1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 /***************************************************************************
4 * Generic Xtensa target API for OpenOCD *
5 * Copyright (C) 2020-2022 Cadence Design Systems, Inc. *
6 * Copyright (C) 2016-2019 Espressif Systems Ltd. *
7 * Derived from esp108.c *
8 * Author: Angus Gratton gus@projectgus.com *
9 ***************************************************************************/
16 #include <helper/time_support.h>
17 #include <helper/align.h>
18 #include <target/register.h>
20 #include "xtensa_chip.h"
23 /* Swap 4-bit Xtensa opcodes and fields */
24 #define XT_NIBSWAP8(V) \
25 ((((V) & 0x0F) << 4) \
26 | (((V) & 0xF0) >> 4))
28 #define XT_NIBSWAP16(V) \
29 ((((V) & 0x000F) << 12) \
30 | (((V) & 0x00F0) << 4) \
31 | (((V) & 0x0F00) >> 4) \
32 | (((V) & 0xF000) >> 12))
34 #define XT_NIBSWAP24(V) \
35 ((((V) & 0x00000F) << 20) \
36 | (((V) & 0x0000F0) << 12) \
37 | (((V) & 0x000F00) << 4) \
38 | (((V) & 0x00F000) >> 4) \
39 | (((V) & 0x0F0000) >> 12) \
40 | (((V) & 0xF00000) >> 20))
43 * Instruction formatting converted from little-endian inputs
44 * and shifted to the MSB-side of DIR for BE systems.
46 #define _XT_INS_FORMAT_RSR(X, OPCODE, SR, T) \
47 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
48 | (((T) & 0x0F) << 16) \
49 | (((SR) & 0xFF) << 8)) << 8 \
51 | (((SR) & 0xFF) << 8) \
52 | (((T) & 0x0F) << 4))
54 #define _XT_INS_FORMAT_RRR(X, OPCODE, ST, R) \
55 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
56 | ((XT_NIBSWAP8((ST) & 0xFF)) << 12) \
57 | (((R) & 0x0F) << 8)) << 8 \
59 | (((ST) & 0xFF) << 4) \
60 | (((R) & 0x0F) << 12))
62 #define _XT_INS_FORMAT_RRRN(X, OPCODE, S, T, IMM4) \
63 (XT_ISBE(X) ? (XT_NIBSWAP16(OPCODE) \
64 | (((T) & 0x0F) << 8) \
65 | (((S) & 0x0F) << 4) \
66 | ((IMM4) & 0x0F)) << 16 \
68 | (((T) & 0x0F) << 4) \
69 | (((S) & 0x0F) << 8) \
70 | (((IMM4) & 0x0F) << 12))
72 #define _XT_INS_FORMAT_RRI8(X, OPCODE, R, S, T, IMM8) \
73 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
74 | (((T) & 0x0F) << 16) \
75 | (((S) & 0x0F) << 12) \
76 | (((R) & 0x0F) << 8) \
77 | ((IMM8) & 0xFF)) << 8 \
79 | (((IMM8) & 0xFF) << 16) \
80 | (((R) & 0x0F) << 12) \
81 | (((S) & 0x0F) << 8) \
82 | (((T) & 0x0F) << 4))
84 #define _XT_INS_FORMAT_RRI4(X, OPCODE, IMM4, R, S, T) \
85 (XT_ISBE(X) ? (XT_NIBSWAP24(OPCODE) \
86 | (((T) & 0x0F) << 16) \
87 | (((S) & 0x0F) << 12) \
88 | (((R) & 0x0F) << 8)) << 8 \
91 | (((IMM4) & 0x0F) << 20) \
92 | (((R) & 0x0F) << 12) \
93 | (((S) & 0x0F) << 8) \
94 | (((T) & 0x0F) << 4))
96 /* Xtensa processor instruction opcodes
98 /* "Return From Debug Operation" to Normal */
99 #define XT_INS_RFDO(X) (XT_ISBE(X) ? 0x000e1f << 8 : 0xf1e000)
100 /* "Return From Debug and Dispatch" - allow sw debugging stuff to take over */
101 #define XT_INS_RFDD(X) (XT_ISBE(X) ? 0x010e1f << 8 : 0xf1e010)
103 /* Load to DDR register, increase addr register */
104 #define XT_INS_LDDR32P(X, S) (XT_ISBE(X) ? (0x0E0700 | ((S) << 12)) << 8 : (0x0070E0 | ((S) << 8)))
105 /* Store from DDR register, increase addr register */
106 #define XT_INS_SDDR32P(X, S) (XT_ISBE(X) ? (0x0F0700 | ((S) << 12)) << 8 : (0x0070F0 | ((S) << 8)))
108 /* Load 32-bit Indirect from A(S)+4*IMM8 to A(T) */
109 #define XT_INS_L32I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x002002, 0, S, T, IMM8)
110 /* Load 16-bit Unsigned from A(S)+2*IMM8 to A(T) */
111 #define XT_INS_L16UI(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x001002, 0, S, T, IMM8)
112 /* Load 8-bit Unsigned from A(S)+IMM8 to A(T) */
113 #define XT_INS_L8UI(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x000002, 0, S, T, IMM8)
115 /* Store 32-bit Indirect to A(S)+4*IMM8 from A(T) */
116 #define XT_INS_S32I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x006002, 0, S, T, IMM8)
117 /* Store 16-bit to A(S)+2*IMM8 from A(T) */
118 #define XT_INS_S16I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x005002, 0, S, T, IMM8)
119 /* Store 8-bit to A(S)+IMM8 from A(T) */
120 #define XT_INS_S8I(X, S, T, IMM8) _XT_INS_FORMAT_RRI8(X, 0x004002, 0, S, T, IMM8)
122 /* Cache Instructions */
123 #define XT_INS_IHI(X, S, IMM8) _XT_INS_FORMAT_RRI8(X, 0x0070E2, 0, S, 0, IMM8)
124 #define XT_INS_DHWBI(X, S, IMM8) _XT_INS_FORMAT_RRI8(X, 0x007052, 0, S, 0, IMM8)
125 #define XT_INS_DHWB(X, S, IMM8) _XT_INS_FORMAT_RRI8(X, 0x007042, 0, S, 0, IMM8)
126 #define XT_INS_ISYNC(X) (XT_ISBE(X) ? 0x000200 << 8 : 0x002000)
128 /* Control Instructions */
129 #define XT_INS_JX(X, S) (XT_ISBE(X) ? (0x050000 | ((S) << 12)) : (0x0000a0 | ((S) << 8)))
130 #define XT_INS_CALL0(X, IMM18) (XT_ISBE(X) ? (0x500000 | ((IMM18) & 0x3ffff)) : (0x000005 | (((IMM18) & 0x3ffff) << 6)))
132 /* Read Special Register */
133 #define XT_INS_RSR(X, SR, T) _XT_INS_FORMAT_RSR(X, 0x030000, SR, T)
134 /* Write Special Register */
135 #define XT_INS_WSR(X, SR, T) _XT_INS_FORMAT_RSR(X, 0x130000, SR, T)
136 /* Swap Special Register */
137 #define XT_INS_XSR(X, SR, T) _XT_INS_FORMAT_RSR(X, 0x610000, SR, T)
139 /* Rotate Window by (-8..7) */
140 #define XT_INS_ROTW(X, N) (XT_ISBE(X) ? ((0x000804) | (((N) & 15) << 16)) << 8 : ((0x408000) | (((N) & 15) << 4)))
142 /* Read User Register */
143 #define XT_INS_RUR(X, UR, T) _XT_INS_FORMAT_RRR(X, 0xE30000, UR, T)
144 /* Write User Register */
145 #define XT_INS_WUR(X, UR, T) _XT_INS_FORMAT_RSR(X, 0xF30000, UR, T)
147 /* Read Floating-Point Register */
148 #define XT_INS_RFR(X, FR, T) _XT_INS_FORMAT_RRR(X, 0xFA0000, ((FR << 4) | 0x4), T)
149 /* Write Floating-Point Register */
150 #define XT_INS_WFR(X, FR, T) _XT_INS_FORMAT_RRR(X, 0xFA0000, ((T << 4) | 0x5), FR)
152 #define XT_INS_L32E(X, R, S, T) _XT_INS_FORMAT_RRI4(X, 0x090000, 0, R, S, T)
153 #define XT_INS_S32E(X, R, S, T) _XT_INS_FORMAT_RRI4(X, 0x490000, 0, R, S, T)
154 #define XT_INS_L32E_S32E_MASK(X) (XT_ISBE(X) ? 0xF000FF << 8 : 0xFF000F)
156 #define XT_INS_RFWO(X) (XT_ISBE(X) ? 0x004300 << 8 : 0x003400)
157 #define XT_INS_RFWU(X) (XT_ISBE(X) ? 0x005300 << 8 : 0x003500)
158 #define XT_INS_RFWO_RFWU_MASK(X) (XT_ISBE(X) ? 0xFFFFFF << 8 : 0xFFFFFF)
160 #define XT_WATCHPOINTS_NUM_MAX 2
162 /* Special register number macro for DDR, PS, WB, A3, A4 registers.
163 * These get used a lot so making a shortcut is useful.
165 #define XT_SR_DDR (xtensa_regs[XT_REG_IDX_DDR].reg_num)
166 #define XT_SR_PS (xtensa_regs[XT_REG_IDX_PS].reg_num)
167 #define XT_SR_WB (xtensa_regs[XT_REG_IDX_WINDOWBASE].reg_num)
168 #define XT_REG_A3 (xtensa_regs[XT_REG_IDX_AR3].reg_num)
169 #define XT_REG_A4 (xtensa_regs[XT_REG_IDX_AR4].reg_num)
171 #define XT_PS_REG_NUM_BASE (0xc0U) /* (EPS2 - 2), for adding DBGLEVEL */
172 #define XT_PC_REG_NUM_BASE (0xb0U) /* (EPC1 - 1), for adding DBGLEVEL */
173 #define XT_PC_REG_NUM_VIRTUAL (0xffU) /* Marker for computing PC (EPC[DBGLEVEL) */
174 #define XT_PC_DBREG_NUM_BASE (0x20U) /* External (i.e., GDB) access */
176 #define XT_SW_BREAKPOINTS_MAX_NUM 32
177 #define XT_HW_IBREAK_MAX_NUM 2
178 #define XT_HW_DBREAK_MAX_NUM 2
180 struct xtensa_reg_desc xtensa_regs[XT_NUM_REGS] = {
181 XT_MK_REG_DESC("pc", XT_PC_REG_NUM_VIRTUAL, XT_REG_SPECIAL, 0),
182 XT_MK_REG_DESC("ar0", 0x00, XT_REG_GENERAL, 0),
183 XT_MK_REG_DESC("ar1", 0x01, XT_REG_GENERAL, 0),
184 XT_MK_REG_DESC("ar2", 0x02, XT_REG_GENERAL, 0),
185 XT_MK_REG_DESC("ar3", 0x03, XT_REG_GENERAL, 0),
186 XT_MK_REG_DESC("ar4", 0x04, XT_REG_GENERAL, 0),
187 XT_MK_REG_DESC("ar5", 0x05, XT_REG_GENERAL, 0),
188 XT_MK_REG_DESC("ar6", 0x06, XT_REG_GENERAL, 0),
189 XT_MK_REG_DESC("ar7", 0x07, XT_REG_GENERAL, 0),
190 XT_MK_REG_DESC("ar8", 0x08, XT_REG_GENERAL, 0),
191 XT_MK_REG_DESC("ar9", 0x09, XT_REG_GENERAL, 0),
192 XT_MK_REG_DESC("ar10", 0x0A, XT_REG_GENERAL, 0),
193 XT_MK_REG_DESC("ar11", 0x0B, XT_REG_GENERAL, 0),
194 XT_MK_REG_DESC("ar12", 0x0C, XT_REG_GENERAL, 0),
195 XT_MK_REG_DESC("ar13", 0x0D, XT_REG_GENERAL, 0),
196 XT_MK_REG_DESC("ar14", 0x0E, XT_REG_GENERAL, 0),
197 XT_MK_REG_DESC("ar15", 0x0F, XT_REG_GENERAL, 0),
198 XT_MK_REG_DESC("ar16", 0x10, XT_REG_GENERAL, 0),
199 XT_MK_REG_DESC("ar17", 0x11, XT_REG_GENERAL, 0),
200 XT_MK_REG_DESC("ar18", 0x12, XT_REG_GENERAL, 0),
201 XT_MK_REG_DESC("ar19", 0x13, XT_REG_GENERAL, 0),
202 XT_MK_REG_DESC("ar20", 0x14, XT_REG_GENERAL, 0),
203 XT_MK_REG_DESC("ar21", 0x15, XT_REG_GENERAL, 0),
204 XT_MK_REG_DESC("ar22", 0x16, XT_REG_GENERAL, 0),
205 XT_MK_REG_DESC("ar23", 0x17, XT_REG_GENERAL, 0),
206 XT_MK_REG_DESC("ar24", 0x18, XT_REG_GENERAL, 0),
207 XT_MK_REG_DESC("ar25", 0x19, XT_REG_GENERAL, 0),
208 XT_MK_REG_DESC("ar26", 0x1A, XT_REG_GENERAL, 0),
209 XT_MK_REG_DESC("ar27", 0x1B, XT_REG_GENERAL, 0),
210 XT_MK_REG_DESC("ar28", 0x1C, XT_REG_GENERAL, 0),
211 XT_MK_REG_DESC("ar29", 0x1D, XT_REG_GENERAL, 0),
212 XT_MK_REG_DESC("ar30", 0x1E, XT_REG_GENERAL, 0),
213 XT_MK_REG_DESC("ar31", 0x1F, XT_REG_GENERAL, 0),
214 XT_MK_REG_DESC("ar32", 0x20, XT_REG_GENERAL, 0),
215 XT_MK_REG_DESC("ar33", 0x21, XT_REG_GENERAL, 0),
216 XT_MK_REG_DESC("ar34", 0x22, XT_REG_GENERAL, 0),
217 XT_MK_REG_DESC("ar35", 0x23, XT_REG_GENERAL, 0),
218 XT_MK_REG_DESC("ar36", 0x24, XT_REG_GENERAL, 0),
219 XT_MK_REG_DESC("ar37", 0x25, XT_REG_GENERAL, 0),
220 XT_MK_REG_DESC("ar38", 0x26, XT_REG_GENERAL, 0),
221 XT_MK_REG_DESC("ar39", 0x27, XT_REG_GENERAL, 0),
222 XT_MK_REG_DESC("ar40", 0x28, XT_REG_GENERAL, 0),
223 XT_MK_REG_DESC("ar41", 0x29, XT_REG_GENERAL, 0),
224 XT_MK_REG_DESC("ar42", 0x2A, XT_REG_GENERAL, 0),
225 XT_MK_REG_DESC("ar43", 0x2B, XT_REG_GENERAL, 0),
226 XT_MK_REG_DESC("ar44", 0x2C, XT_REG_GENERAL, 0),
227 XT_MK_REG_DESC("ar45", 0x2D, XT_REG_GENERAL, 0),
228 XT_MK_REG_DESC("ar46", 0x2E, XT_REG_GENERAL, 0),
229 XT_MK_REG_DESC("ar47", 0x2F, XT_REG_GENERAL, 0),
230 XT_MK_REG_DESC("ar48", 0x30, XT_REG_GENERAL, 0),
231 XT_MK_REG_DESC("ar49", 0x31, XT_REG_GENERAL, 0),
232 XT_MK_REG_DESC("ar50", 0x32, XT_REG_GENERAL, 0),
233 XT_MK_REG_DESC("ar51", 0x33, XT_REG_GENERAL, 0),
234 XT_MK_REG_DESC("ar52", 0x34, XT_REG_GENERAL, 0),
235 XT_MK_REG_DESC("ar53", 0x35, XT_REG_GENERAL, 0),
236 XT_MK_REG_DESC("ar54", 0x36, XT_REG_GENERAL, 0),
237 XT_MK_REG_DESC("ar55", 0x37, XT_REG_GENERAL, 0),
238 XT_MK_REG_DESC("ar56", 0x38, XT_REG_GENERAL, 0),
239 XT_MK_REG_DESC("ar57", 0x39, XT_REG_GENERAL, 0),
240 XT_MK_REG_DESC("ar58", 0x3A, XT_REG_GENERAL, 0),
241 XT_MK_REG_DESC("ar59", 0x3B, XT_REG_GENERAL, 0),
242 XT_MK_REG_DESC("ar60", 0x3C, XT_REG_GENERAL, 0),
243 XT_MK_REG_DESC("ar61", 0x3D, XT_REG_GENERAL, 0),
244 XT_MK_REG_DESC("ar62", 0x3E, XT_REG_GENERAL, 0),
245 XT_MK_REG_DESC("ar63", 0x3F, XT_REG_GENERAL, 0),
246 XT_MK_REG_DESC("windowbase", 0x48, XT_REG_SPECIAL, 0),
247 XT_MK_REG_DESC("windowstart", 0x49, XT_REG_SPECIAL, 0),
248 XT_MK_REG_DESC("ps", 0xE6, XT_REG_SPECIAL, 0), /* PS (not mapped through EPS[]) */
249 XT_MK_REG_DESC("ibreakenable", 0x60, XT_REG_SPECIAL, 0),
250 XT_MK_REG_DESC("ddr", 0x68, XT_REG_DEBUG, XT_REGF_NOREAD),
251 XT_MK_REG_DESC("ibreaka0", 0x80, XT_REG_SPECIAL, 0),
252 XT_MK_REG_DESC("ibreaka1", 0x81, XT_REG_SPECIAL, 0),
253 XT_MK_REG_DESC("dbreaka0", 0x90, XT_REG_SPECIAL, 0),
254 XT_MK_REG_DESC("dbreaka1", 0x91, XT_REG_SPECIAL, 0),
255 XT_MK_REG_DESC("dbreakc0", 0xA0, XT_REG_SPECIAL, 0),
256 XT_MK_REG_DESC("dbreakc1", 0xA1, XT_REG_SPECIAL, 0),
257 XT_MK_REG_DESC("cpenable", 0xE0, XT_REG_SPECIAL, 0),
258 XT_MK_REG_DESC("exccause", 0xE8, XT_REG_SPECIAL, 0),
259 XT_MK_REG_DESC("debugcause", 0xE9, XT_REG_SPECIAL, 0),
260 XT_MK_REG_DESC("icount", 0xEC, XT_REG_SPECIAL, 0),
261 XT_MK_REG_DESC("icountlevel", 0xED, XT_REG_SPECIAL, 0),
263 /* WARNING: For these registers, regnum points to the
264 * index of the corresponding ARx registers, NOT to
265 * the processor register number! */
266 XT_MK_REG_DESC("a0", XT_REG_IDX_AR0, XT_REG_RELGEN, 0),
267 XT_MK_REG_DESC("a1", XT_REG_IDX_AR1, XT_REG_RELGEN, 0),
268 XT_MK_REG_DESC("a2", XT_REG_IDX_AR2, XT_REG_RELGEN, 0),
269 XT_MK_REG_DESC("a3", XT_REG_IDX_AR3, XT_REG_RELGEN, 0),
270 XT_MK_REG_DESC("a4", XT_REG_IDX_AR4, XT_REG_RELGEN, 0),
271 XT_MK_REG_DESC("a5", XT_REG_IDX_AR5, XT_REG_RELGEN, 0),
272 XT_MK_REG_DESC("a6", XT_REG_IDX_AR6, XT_REG_RELGEN, 0),
273 XT_MK_REG_DESC("a7", XT_REG_IDX_AR7, XT_REG_RELGEN, 0),
274 XT_MK_REG_DESC("a8", XT_REG_IDX_AR8, XT_REG_RELGEN, 0),
275 XT_MK_REG_DESC("a9", XT_REG_IDX_AR9, XT_REG_RELGEN, 0),
276 XT_MK_REG_DESC("a10", XT_REG_IDX_AR10, XT_REG_RELGEN, 0),
277 XT_MK_REG_DESC("a11", XT_REG_IDX_AR11, XT_REG_RELGEN, 0),
278 XT_MK_REG_DESC("a12", XT_REG_IDX_AR12, XT_REG_RELGEN, 0),
279 XT_MK_REG_DESC("a13", XT_REG_IDX_AR13, XT_REG_RELGEN, 0),
280 XT_MK_REG_DESC("a14", XT_REG_IDX_AR14, XT_REG_RELGEN, 0),
281 XT_MK_REG_DESC("a15", XT_REG_IDX_AR15, XT_REG_RELGEN, 0),
285 * Types of memory used at xtensa target
287 enum xtensa_mem_region_type {
288 XTENSA_MEM_REG_IROM = 0x0,
297 /* Register definition as union for list allocation */
298 union xtensa_reg_val_u {
299 xtensa_reg_val_t val;
303 const struct xtensa_keyval_info_s xt_qerr[XT_QERR_NUM] = {
304 { .chrval = "E00", .intval = ERROR_FAIL },
305 { .chrval = "E01", .intval = ERROR_FAIL },
306 { .chrval = "E02", .intval = ERROR_COMMAND_ARGUMENT_INVALID },
307 { .chrval = "E03", .intval = ERROR_FAIL },
310 /* Set to true for extra debug logging */
311 static const bool xtensa_extra_debug_log;
314 * Gets a config for the specific mem type
316 static inline const struct xtensa_local_mem_config *xtensa_get_mem_config(
317 struct xtensa *xtensa,
318 enum xtensa_mem_region_type type)
321 case XTENSA_MEM_REG_IROM:
322 return &xtensa->core_config->irom;
323 case XTENSA_MEM_REG_IRAM:
324 return &xtensa->core_config->iram;
325 case XTENSA_MEM_REG_DROM:
326 return &xtensa->core_config->drom;
327 case XTENSA_MEM_REG_DRAM:
328 return &xtensa->core_config->dram;
329 case XTENSA_MEM_REG_SRAM:
330 return &xtensa->core_config->sram;
331 case XTENSA_MEM_REG_SROM:
332 return &xtensa->core_config->srom;
339 * Extracts an exact xtensa_local_mem_region_config from xtensa_local_mem_config
340 * for a given address
341 * Returns NULL if nothing found
343 static inline const struct xtensa_local_mem_region_config *xtensa_memory_region_find(
344 const struct xtensa_local_mem_config *mem,
345 target_addr_t address)
347 for (unsigned int i = 0; i < mem->count; i++) {
348 const struct xtensa_local_mem_region_config *region = &mem->regions[i];
349 if (address >= region->base && address < (region->base + region->size))
356 * Returns a corresponding xtensa_local_mem_region_config from the xtensa target
357 * for a given address
358 * Returns NULL if nothing found
360 static inline const struct xtensa_local_mem_region_config *xtensa_target_memory_region_find(
361 struct xtensa *xtensa,
362 target_addr_t address)
364 const struct xtensa_local_mem_region_config *result;
365 const struct xtensa_local_mem_config *mcgf;
366 for (unsigned int mtype = 0; mtype < XTENSA_MEM_REGS_NUM; mtype++) {
367 mcgf = xtensa_get_mem_config(xtensa, mtype);
368 result = xtensa_memory_region_find(mcgf, address);
375 static inline bool xtensa_is_cacheable(const struct xtensa_cache_config *cache,
376 const struct xtensa_local_mem_config *mem,
377 target_addr_t address)
381 return xtensa_memory_region_find(mem, address);
384 static inline bool xtensa_is_icacheable(struct xtensa *xtensa, target_addr_t address)
386 return xtensa_is_cacheable(&xtensa->core_config->icache, &xtensa->core_config->iram, address) ||
387 xtensa_is_cacheable(&xtensa->core_config->icache, &xtensa->core_config->irom, address) ||
388 xtensa_is_cacheable(&xtensa->core_config->icache, &xtensa->core_config->sram, address) ||
389 xtensa_is_cacheable(&xtensa->core_config->icache, &xtensa->core_config->srom, address);
392 static inline bool xtensa_is_dcacheable(struct xtensa *xtensa, target_addr_t address)
394 return xtensa_is_cacheable(&xtensa->core_config->dcache, &xtensa->core_config->dram, address) ||
395 xtensa_is_cacheable(&xtensa->core_config->dcache, &xtensa->core_config->drom, address) ||
396 xtensa_is_cacheable(&xtensa->core_config->dcache, &xtensa->core_config->sram, address) ||
397 xtensa_is_cacheable(&xtensa->core_config->dcache, &xtensa->core_config->srom, address);
400 static int xtensa_core_reg_get(struct reg *reg)
402 /* We don't need this because we read all registers on halt anyway. */
403 struct xtensa *xtensa = (struct xtensa *)reg->arch_info;
404 struct target *target = xtensa->target;
406 if (target->state != TARGET_HALTED)
407 return ERROR_TARGET_NOT_HALTED;
409 if (strncmp(reg->name, "?0x", 3) == 0) {
410 unsigned int regnum = strtoul(reg->name + 1, 0, 0);
411 LOG_WARNING("Read unknown register 0x%04x ignored", regnum);
414 return ERROR_COMMAND_ARGUMENT_INVALID;
419 static int xtensa_core_reg_set(struct reg *reg, uint8_t *buf)
421 struct xtensa *xtensa = (struct xtensa *)reg->arch_info;
422 struct target *target = xtensa->target;
424 assert(reg->size <= 64 && "up to 64-bit regs are supported only!");
425 if (target->state != TARGET_HALTED)
426 return ERROR_TARGET_NOT_HALTED;
429 if (strncmp(reg->name, "?0x", 3) == 0) {
430 unsigned int regnum = strtoul(reg->name + 1, 0, 0);
431 LOG_WARNING("Write unknown register 0x%04x ignored", regnum);
434 return ERROR_COMMAND_ARGUMENT_INVALID;
437 buf_cpy(buf, reg->value, reg->size);
439 if (xtensa->core_config->windowed) {
440 /* If the user updates a potential scratch register, track for conflicts */
441 for (enum xtensa_ar_scratch_set_e s = 0; s < XT_AR_SCRATCH_NUM; s++) {
442 if (strcmp(reg->name, xtensa->scratch_ars[s].chrval) == 0) {
443 LOG_DEBUG("Scratch reg %s [0x%08" PRIx32 "] set from gdb", reg->name,
444 buf_get_u32(reg->value, 0, 32));
445 LOG_DEBUG("scratch_ars mapping: a3/%s, a4/%s",
446 xtensa->scratch_ars[XT_AR_SCRATCH_AR3].chrval,
447 xtensa->scratch_ars[XT_AR_SCRATCH_AR4].chrval);
448 xtensa->scratch_ars[s].intval = true;
459 static const struct reg_arch_type xtensa_reg_type = {
460 .get = xtensa_core_reg_get,
461 .set = xtensa_core_reg_set,
464 /* Convert a register index that's indexed relative to windowbase, to the real address. */
465 static enum xtensa_reg_id xtensa_windowbase_offset_to_canonical(struct xtensa *xtensa,
466 enum xtensa_reg_id reg_idx,
470 if (reg_idx >= XT_REG_IDX_AR0 && reg_idx <= XT_REG_IDX_ARLAST) {
471 idx = reg_idx - XT_REG_IDX_AR0;
472 } else if (reg_idx >= XT_REG_IDX_A0 && reg_idx <= XT_REG_IDX_A15) {
473 idx = reg_idx - XT_REG_IDX_A0;
475 LOG_ERROR("Error: can't convert register %d to non-windowbased register!", reg_idx);
478 return ((idx + windowbase * 4) & (xtensa->core_config->aregs_num - 1)) + XT_REG_IDX_AR0;
481 static enum xtensa_reg_id xtensa_canonical_to_windowbase_offset(struct xtensa *xtensa,
482 enum xtensa_reg_id reg_idx,
485 return xtensa_windowbase_offset_to_canonical(xtensa, reg_idx, -windowbase);
488 static void xtensa_mark_register_dirty(struct xtensa *xtensa, enum xtensa_reg_id reg_idx)
490 struct reg *reg_list = xtensa->core_cache->reg_list;
491 reg_list[reg_idx].dirty = true;
494 static void xtensa_queue_exec_ins(struct xtensa *xtensa, uint32_t ins)
496 xtensa_queue_dbg_reg_write(xtensa, NARADR_DIR0EXEC, ins);
499 static void xtensa_queue_exec_ins_wide(struct xtensa *xtensa, uint8_t *ops, uint8_t oplen)
501 if ((oplen > 0) && (oplen <= 64)) {
502 uint32_t opsw[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; /* 8 DIRx regs: max width 64B */
503 uint8_t oplenw = (oplen + 3) / 4;
504 if (xtensa->target->endianness == TARGET_BIG_ENDIAN)
505 buf_bswap32((uint8_t *)opsw, ops, oplenw * 4);
507 memcpy(opsw, ops, oplen);
508 for (int32_t i = oplenw - 1; i > 0; i--)
509 xtensa_queue_dbg_reg_write(xtensa, NARADR_DIR0 + i, opsw[i]);
510 /* Write DIR0EXEC last */
511 xtensa_queue_dbg_reg_write(xtensa, NARADR_DIR0EXEC, opsw[0]);
515 static int xtensa_queue_pwr_reg_write(struct xtensa *xtensa, unsigned int reg, uint32_t data)
517 struct xtensa_debug_module *dm = &xtensa->dbg_mod;
518 return dm->pwr_ops->queue_reg_write(dm, reg, data);
521 /* NOTE: Assumes A3 has already been saved */
522 int xtensa_window_state_save(struct target *target, uint32_t *woe)
524 struct xtensa *xtensa = target_to_xtensa(target);
528 if (xtensa->core_config->windowed) {
529 /* Save PS (LX) and disable window overflow exceptions prior to AR save */
530 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_PS, XT_REG_A3));
531 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
532 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, woe_buf);
533 int res = jtag_execute_queue();
534 if (res != ERROR_OK) {
535 LOG_ERROR("Failed to read PS (%d)!", res);
538 xtensa_core_status_check(target);
539 *woe = buf_get_u32(woe_buf, 0, 32);
540 woe_dis = *woe & ~XT_PS_WOE_MSK;
541 LOG_DEBUG("Clearing PS.WOE (0x%08" PRIx32 " -> 0x%08" PRIx32 ")", *woe, woe_dis);
542 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, woe_dis);
543 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
544 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_PS, XT_REG_A3));
549 /* NOTE: Assumes A3 has already been saved */
550 void xtensa_window_state_restore(struct target *target, uint32_t woe)
552 struct xtensa *xtensa = target_to_xtensa(target);
553 if (xtensa->core_config->windowed) {
554 /* Restore window overflow exception state */
555 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, woe);
556 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
557 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_PS, XT_REG_A3));
558 LOG_DEBUG("Restored PS.WOE (0x%08" PRIx32 ")", woe);
562 static bool xtensa_reg_is_readable(int flags, int cpenable)
564 if (flags & XT_REGF_NOREAD)
566 if ((flags & XT_REGF_COPROC0) && (cpenable & BIT(0)) == 0)
571 static bool xtensa_scratch_regs_fixup(struct xtensa *xtensa, struct reg *reg_list, int i, int j, int a_idx, int ar_idx)
573 int a_name = (a_idx == XT_AR_SCRATCH_A3) ? 3 : 4;
574 if (xtensa->scratch_ars[a_idx].intval && !xtensa->scratch_ars[ar_idx].intval) {
575 LOG_DEBUG("AR conflict: a%d -> ar%d", a_name, j - XT_REG_IDX_AR0);
576 memcpy(reg_list[j].value, reg_list[i].value, sizeof(xtensa_reg_val_t));
578 LOG_DEBUG("AR conflict: ar%d -> a%d", j - XT_REG_IDX_AR0, a_name);
579 memcpy(reg_list[i].value, reg_list[j].value, sizeof(xtensa_reg_val_t));
581 return xtensa->scratch_ars[a_idx].intval && xtensa->scratch_ars[ar_idx].intval;
584 static int xtensa_write_dirty_registers(struct target *target)
586 struct xtensa *xtensa = target_to_xtensa(target);
588 xtensa_reg_val_t regval, windowbase = 0;
589 bool scratch_reg_dirty = false, delay_cpenable = false;
590 struct reg *reg_list = xtensa->core_cache->reg_list;
591 unsigned int reg_list_size = xtensa->core_cache->num_regs;
592 bool preserve_a3 = false;
594 xtensa_reg_val_t a3 = 0, woe;
596 LOG_TARGET_DEBUG(target, "start");
598 /* We need to write the dirty registers in the cache list back to the processor.
599 * Start by writing the SFR/user registers. */
600 for (unsigned int i = 0; i < reg_list_size; i++) {
601 struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
602 unsigned int ridx = (i < XT_NUM_REGS) ? i : i - XT_NUM_REGS;
603 if (reg_list[i].dirty) {
604 if (rlist[ridx].type == XT_REG_SPECIAL ||
605 rlist[ridx].type == XT_REG_USER ||
606 rlist[ridx].type == XT_REG_FR) {
607 scratch_reg_dirty = true;
608 if (i == XT_REG_IDX_CPENABLE) {
609 delay_cpenable = true;
612 regval = xtensa_reg_get(target, i);
613 LOG_TARGET_DEBUG(target, "Writing back reg %s (%d) val %08" PRIX32,
617 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, regval);
618 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
619 if (reg_list[i].exist) {
620 unsigned int reg_num = rlist[ridx].reg_num;
621 if (rlist[ridx].type == XT_REG_USER) {
622 xtensa_queue_exec_ins(xtensa, XT_INS_WUR(xtensa, reg_num, XT_REG_A3));
623 } else if (rlist[ridx].type == XT_REG_FR) {
624 xtensa_queue_exec_ins(xtensa, XT_INS_WFR(xtensa, reg_num, XT_REG_A3));
626 if (reg_num == XT_PC_REG_NUM_VIRTUAL)
627 /* reg number of PC for debug interrupt depends on NDEBUGLEVEL
630 (XT_PC_REG_NUM_BASE +
631 xtensa->core_config->debug.irq_level);
632 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, reg_num, XT_REG_A3));
635 reg_list[i].dirty = false;
639 if (scratch_reg_dirty)
640 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A3);
641 if (delay_cpenable) {
642 regval = xtensa_reg_get(target, XT_REG_IDX_CPENABLE);
643 LOG_TARGET_DEBUG(target, "Writing back reg cpenable (224) val %08" PRIX32, regval);
644 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, regval);
645 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
646 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa,
647 xtensa_regs[XT_REG_IDX_CPENABLE].reg_num,
649 reg_list[XT_REG_IDX_CPENABLE].dirty = false;
652 preserve_a3 = (xtensa->core_config->windowed);
654 /* Save (windowed) A3 for scratch use */
655 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
656 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, a3_buf);
657 res = jtag_execute_queue();
660 xtensa_core_status_check(target);
661 a3 = buf_get_u32(a3_buf, 0, 32);
664 if (xtensa->core_config->windowed) {
665 res = xtensa_window_state_save(target, &woe);
668 /* Grab the windowbase, we need it. */
669 windowbase = xtensa_reg_get(target, XT_REG_IDX_WINDOWBASE);
670 /* Check if there are mismatches between the ARx and corresponding Ax registers.
671 * When the user sets a register on a windowed config, xt-gdb may set the ARx
672 * register directly. Thus we take ARx as priority over Ax if both are dirty
673 * and it's unclear if the user set one over the other explicitly.
675 for (unsigned int i = XT_REG_IDX_A0; i <= XT_REG_IDX_A15; i++) {
676 unsigned int j = xtensa_windowbase_offset_to_canonical(xtensa, i, windowbase);
677 if (reg_list[i].dirty && reg_list[j].dirty) {
678 if (memcmp(reg_list[i].value, reg_list[j].value, sizeof(xtensa_reg_val_t)) != 0) {
679 bool show_warning = true;
680 if (i == XT_REG_IDX_A3)
681 show_warning = xtensa_scratch_regs_fixup(xtensa,
682 reg_list, i, j, XT_AR_SCRATCH_A3, XT_AR_SCRATCH_AR3);
683 else if (i == XT_REG_IDX_A4)
684 show_warning = xtensa_scratch_regs_fixup(xtensa,
685 reg_list, i, j, XT_AR_SCRATCH_A4, XT_AR_SCRATCH_AR4);
688 "Warning: Both A%d [0x%08" PRIx32
689 "] as well as its underlying physical register "
690 "(AR%d) [0x%08" PRIx32 "] are dirty and differ in value",
692 buf_get_u32(reg_list[i].value, 0, 32),
694 buf_get_u32(reg_list[j].value, 0, 32));
701 for (unsigned int i = 0; i < 16; i++) {
702 if (reg_list[XT_REG_IDX_A0 + i].dirty) {
703 regval = xtensa_reg_get(target, XT_REG_IDX_A0 + i);
704 LOG_TARGET_DEBUG(target, "Writing back reg %s value %08" PRIX32 ", num =%i",
705 xtensa_regs[XT_REG_IDX_A0 + i].name,
707 xtensa_regs[XT_REG_IDX_A0 + i].reg_num);
708 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, regval);
709 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, i));
710 reg_list[XT_REG_IDX_A0 + i].dirty = false;
712 /* Avoid stomping A3 during restore at end of function */
718 if (xtensa->core_config->windowed) {
719 /* Now write AR registers */
720 for (unsigned int j = 0; j < XT_REG_IDX_ARLAST; j += 16) {
721 /* Write the 16 registers we can see */
722 for (unsigned int i = 0; i < 16; i++) {
723 if (i + j < xtensa->core_config->aregs_num) {
724 enum xtensa_reg_id realadr =
725 xtensa_windowbase_offset_to_canonical(xtensa, XT_REG_IDX_AR0 + i + j,
727 /* Write back any dirty un-windowed registers */
728 if (reg_list[realadr].dirty) {
729 regval = xtensa_reg_get(target, realadr);
732 "Writing back reg %s value %08" PRIX32 ", num =%i",
733 xtensa_regs[realadr].name,
735 xtensa_regs[realadr].reg_num);
736 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, regval);
737 xtensa_queue_exec_ins(xtensa,
738 XT_INS_RSR(xtensa, XT_SR_DDR,
739 xtensa_regs[XT_REG_IDX_AR0 + i].reg_num));
740 reg_list[realadr].dirty = false;
742 /* Avoid stomping AR during A3 restore at end of function */
747 /*Now rotate the window so we'll see the next 16 registers. The final rotate
748 * will wraparound, */
749 /*leaving us in the state we were. */
750 xtensa_queue_exec_ins(xtensa, XT_INS_ROTW(xtensa, 4));
753 xtensa_window_state_restore(target, woe);
755 for (enum xtensa_ar_scratch_set_e s = 0; s < XT_AR_SCRATCH_NUM; s++)
756 xtensa->scratch_ars[s].intval = false;
760 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, a3);
761 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
764 res = jtag_execute_queue();
765 xtensa_core_status_check(target);
770 static inline bool xtensa_is_stopped(struct target *target)
772 struct xtensa *xtensa = target_to_xtensa(target);
773 return xtensa->dbg_mod.core_status.dsr & OCDDSR_STOPPED;
776 int xtensa_examine(struct target *target)
778 struct xtensa *xtensa = target_to_xtensa(target);
779 unsigned int cmd = PWRCTL_DEBUGWAKEUP | PWRCTL_MEMWAKEUP | PWRCTL_COREWAKEUP;
781 LOG_DEBUG("coreid = %d", target->coreid);
783 if (xtensa->core_config->core_type == XT_UNDEF) {
784 LOG_ERROR("XTensa core not configured; is xtensa-core-openocd.cfg missing?");
788 xtensa_queue_pwr_reg_write(xtensa, DMREG_PWRCTL, cmd);
789 xtensa_queue_pwr_reg_write(xtensa, DMREG_PWRCTL, cmd | PWRCTL_JTAGDEBUGUSE);
790 xtensa_dm_queue_enable(&xtensa->dbg_mod);
791 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
792 int res = jtag_execute_queue();
795 if (!xtensa_dm_is_online(&xtensa->dbg_mod)) {
796 LOG_ERROR("Unexpected OCD_ID = %08" PRIx32, xtensa->dbg_mod.device_id);
797 return ERROR_TARGET_FAILURE;
799 LOG_DEBUG("OCD_ID = %08" PRIx32, xtensa->dbg_mod.device_id);
800 if (!target_was_examined(target))
801 target_set_examined(target);
802 xtensa_smpbreak_write(xtensa, xtensa->smp_break);
806 int xtensa_wakeup(struct target *target)
808 struct xtensa *xtensa = target_to_xtensa(target);
809 unsigned int cmd = PWRCTL_DEBUGWAKEUP | PWRCTL_MEMWAKEUP | PWRCTL_COREWAKEUP;
811 if (xtensa->reset_asserted)
812 cmd |= PWRCTL_CORERESET;
813 xtensa_queue_pwr_reg_write(xtensa, DMREG_PWRCTL, cmd);
814 /* TODO: can we join this with the write above? */
815 xtensa_queue_pwr_reg_write(xtensa, DMREG_PWRCTL, cmd | PWRCTL_JTAGDEBUGUSE);
816 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
817 return jtag_execute_queue();
820 int xtensa_smpbreak_write(struct xtensa *xtensa, uint32_t set)
822 uint32_t dsr_data = 0x00110000;
823 uint32_t clear = (set | OCDDCR_ENABLEOCD) ^
824 (OCDDCR_BREAKINEN | OCDDCR_BREAKOUTEN | OCDDCR_RUNSTALLINEN |
825 OCDDCR_DEBUGMODEOUTEN | OCDDCR_ENABLEOCD);
827 LOG_TARGET_DEBUG(xtensa->target, "write smpbreak set=0x%" PRIx32 " clear=0x%" PRIx32, set, clear);
828 xtensa_queue_dbg_reg_write(xtensa, NARADR_DCRSET, set | OCDDCR_ENABLEOCD);
829 xtensa_queue_dbg_reg_write(xtensa, NARADR_DCRCLR, clear);
830 xtensa_queue_dbg_reg_write(xtensa, NARADR_DSR, dsr_data);
831 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
832 return jtag_execute_queue();
835 int xtensa_smpbreak_set(struct target *target, uint32_t set)
837 struct xtensa *xtensa = target_to_xtensa(target);
840 xtensa->smp_break = set;
841 if (target_was_examined(target))
842 res = xtensa_smpbreak_write(xtensa, xtensa->smp_break);
843 LOG_TARGET_DEBUG(target, "set smpbreak=%" PRIx32 ", state=%i", set, target->state);
847 int xtensa_smpbreak_read(struct xtensa *xtensa, uint32_t *val)
849 uint8_t dcr_buf[sizeof(uint32_t)];
851 xtensa_queue_dbg_reg_read(xtensa, NARADR_DCRSET, dcr_buf);
852 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
853 int res = jtag_execute_queue();
854 *val = buf_get_u32(dcr_buf, 0, 32);
859 int xtensa_smpbreak_get(struct target *target, uint32_t *val)
861 struct xtensa *xtensa = target_to_xtensa(target);
862 *val = xtensa->smp_break;
866 static inline xtensa_reg_val_t xtensa_reg_get_value(struct reg *reg)
868 return buf_get_u32(reg->value, 0, 32);
871 static inline void xtensa_reg_set_value(struct reg *reg, xtensa_reg_val_t value)
873 buf_set_u32(reg->value, 0, 32, value);
877 int xtensa_core_status_check(struct target *target)
879 struct xtensa *xtensa = target_to_xtensa(target);
880 int res, needclear = 0;
882 xtensa_dm_core_status_read(&xtensa->dbg_mod);
883 xtensa_dsr_t dsr = xtensa_dm_core_status_get(&xtensa->dbg_mod);
884 LOG_TARGET_DEBUG(target, "DSR (%08" PRIX32 ")", dsr);
885 if (dsr & OCDDSR_EXECBUSY) {
886 if (!xtensa->suppress_dsr_errors)
887 LOG_TARGET_ERROR(target, "DSR (%08" PRIX32 ") indicates target still busy!", dsr);
890 if (dsr & OCDDSR_EXECEXCEPTION) {
891 if (!xtensa->suppress_dsr_errors)
892 LOG_TARGET_ERROR(target,
893 "DSR (%08" PRIX32 ") indicates DIR instruction generated an exception!",
897 if (dsr & OCDDSR_EXECOVERRUN) {
898 if (!xtensa->suppress_dsr_errors)
899 LOG_TARGET_ERROR(target,
900 "DSR (%08" PRIX32 ") indicates DIR instruction generated an overrun!",
905 res = xtensa_dm_core_status_clear(&xtensa->dbg_mod,
906 OCDDSR_EXECEXCEPTION | OCDDSR_EXECOVERRUN);
907 if (res != ERROR_OK && !xtensa->suppress_dsr_errors)
908 LOG_TARGET_ERROR(target, "clearing DSR failed!");
914 xtensa_reg_val_t xtensa_reg_get(struct target *target, enum xtensa_reg_id reg_id)
916 struct xtensa *xtensa = target_to_xtensa(target);
917 struct reg *reg = &xtensa->core_cache->reg_list[reg_id];
918 return xtensa_reg_get_value(reg);
921 void xtensa_reg_set(struct target *target, enum xtensa_reg_id reg_id, xtensa_reg_val_t value)
923 struct xtensa *xtensa = target_to_xtensa(target);
924 struct reg *reg = &xtensa->core_cache->reg_list[reg_id];
925 if (xtensa_reg_get_value(reg) == value)
927 xtensa_reg_set_value(reg, value);
930 /* Set Ax (XT_REG_RELGEN) register along with its underlying ARx (XT_REG_GENERAL) */
931 void xtensa_reg_set_deep_relgen(struct target *target, enum xtensa_reg_id a_idx, xtensa_reg_val_t value)
933 struct xtensa *xtensa = target_to_xtensa(target);
934 uint32_t windowbase = (xtensa->core_config->windowed ?
935 xtensa_reg_get(target, XT_REG_IDX_WINDOWBASE) : 0);
936 int ar_idx = xtensa_windowbase_offset_to_canonical(xtensa, a_idx, windowbase);
937 xtensa_reg_set(target, a_idx, value);
938 xtensa_reg_set(target, ar_idx, value);
941 /* Read cause for entering halted state; return bitmask in DEBUGCAUSE_* format */
942 uint32_t xtensa_cause_get(struct target *target)
944 return xtensa_reg_get(target, XT_REG_IDX_DEBUGCAUSE);
947 void xtensa_cause_clear(struct target *target)
949 struct xtensa *xtensa = target_to_xtensa(target);
950 xtensa_reg_set(target, XT_REG_IDX_DEBUGCAUSE, 0);
951 xtensa->core_cache->reg_list[XT_REG_IDX_DEBUGCAUSE].dirty = false;
954 int xtensa_assert_reset(struct target *target)
956 struct xtensa *xtensa = target_to_xtensa(target);
958 LOG_TARGET_DEBUG(target, "target_number=%i, begin", target->target_number);
959 target->state = TARGET_RESET;
960 xtensa_queue_pwr_reg_write(xtensa,
962 PWRCTL_JTAGDEBUGUSE | PWRCTL_DEBUGWAKEUP | PWRCTL_MEMWAKEUP | PWRCTL_COREWAKEUP |
964 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
965 int res = jtag_execute_queue();
968 xtensa->reset_asserted = true;
972 int xtensa_deassert_reset(struct target *target)
974 struct xtensa *xtensa = target_to_xtensa(target);
976 LOG_TARGET_DEBUG(target, "halt=%d", target->reset_halt);
977 if (target->reset_halt)
978 xtensa_queue_dbg_reg_write(xtensa,
980 OCDDCR_ENABLEOCD | OCDDCR_DEBUGINTERRUPT);
981 xtensa_queue_pwr_reg_write(xtensa,
983 PWRCTL_JTAGDEBUGUSE | PWRCTL_DEBUGWAKEUP | PWRCTL_MEMWAKEUP | PWRCTL_COREWAKEUP);
984 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
985 int res = jtag_execute_queue();
988 target->state = TARGET_RUNNING;
989 xtensa->reset_asserted = false;
993 int xtensa_soft_reset_halt(struct target *target)
995 LOG_TARGET_DEBUG(target, "begin");
996 return xtensa_assert_reset(target);
999 int xtensa_fetch_all_regs(struct target *target)
1001 struct xtensa *xtensa = target_to_xtensa(target);
1002 struct reg *reg_list = xtensa->core_cache->reg_list;
1003 unsigned int reg_list_size = xtensa->core_cache->num_regs;
1004 xtensa_reg_val_t cpenable = 0, windowbase = 0, a3;
1007 bool debug_dsrs = !xtensa->regs_fetched || LOG_LEVEL_IS(LOG_LVL_DEBUG);
1009 union xtensa_reg_val_u *regvals = calloc(reg_list_size, sizeof(*regvals));
1011 LOG_TARGET_ERROR(target, "unable to allocate memory for regvals!");
1014 union xtensa_reg_val_u *dsrs = calloc(reg_list_size, sizeof(*dsrs));
1016 LOG_TARGET_ERROR(target, "unable to allocate memory for dsrs!");
1021 LOG_TARGET_DEBUG(target, "start");
1023 /* Save (windowed) A3 so cache matches physical AR3; A3 usable as scratch */
1024 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
1025 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, a3_buf);
1026 int res = xtensa_window_state_save(target, &woe);
1027 if (res != ERROR_OK)
1028 goto xtensa_fetch_all_regs_done;
1030 /* Assume the CPU has just halted. We now want to fill the register cache with all the
1031 * register contents GDB needs. For speed, we pipeline all the read operations, execute them
1032 * in one go, then sort everything out from the regvals variable. */
1034 /* Start out with AREGS; we can reach those immediately. Grab them per 16 registers. */
1035 for (unsigned int j = 0; j < XT_AREGS_NUM_MAX; j += 16) {
1036 /*Grab the 16 registers we can see */
1037 for (unsigned int i = 0; i < 16; i++) {
1038 if (i + j < xtensa->core_config->aregs_num) {
1039 xtensa_queue_exec_ins(xtensa,
1040 XT_INS_WSR(xtensa, XT_SR_DDR, xtensa_regs[XT_REG_IDX_AR0 + i].reg_num));
1041 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR,
1042 regvals[XT_REG_IDX_AR0 + i + j].buf);
1044 xtensa_queue_dbg_reg_read(xtensa, NARADR_DSR,
1045 dsrs[XT_REG_IDX_AR0 + i + j].buf);
1048 if (xtensa->core_config->windowed)
1049 /* Now rotate the window so we'll see the next 16 registers. The final rotate
1050 * will wraparound, */
1051 /* leaving us in the state we were. */
1052 xtensa_queue_exec_ins(xtensa, XT_INS_ROTW(xtensa, 4));
1054 xtensa_window_state_restore(target, woe);
1056 if (xtensa->core_config->coproc) {
1057 /* As the very first thing after AREGS, go grab CPENABLE */
1058 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, xtensa_regs[XT_REG_IDX_CPENABLE].reg_num, XT_REG_A3));
1059 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
1060 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, regvals[XT_REG_IDX_CPENABLE].buf);
1062 res = jtag_execute_queue();
1063 if (res != ERROR_OK) {
1064 LOG_ERROR("Failed to read ARs (%d)!", res);
1065 goto xtensa_fetch_all_regs_done;
1067 xtensa_core_status_check(target);
1069 a3 = buf_get_u32(a3_buf, 0, 32);
1071 if (xtensa->core_config->coproc) {
1072 cpenable = buf_get_u32(regvals[XT_REG_IDX_CPENABLE].buf, 0, 32);
1074 /* Enable all coprocessors (by setting all bits in CPENABLE) so we can read FP and user registers. */
1075 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, 0xffffffff);
1076 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1077 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, xtensa_regs[XT_REG_IDX_CPENABLE].reg_num, XT_REG_A3));
1079 /* Save CPENABLE; flag dirty later (when regcache updated) so original value is always restored */
1080 LOG_TARGET_DEBUG(target, "CPENABLE: was 0x%" PRIx32 ", all enabled", cpenable);
1081 xtensa_reg_set(target, XT_REG_IDX_CPENABLE, cpenable);
1083 /* We're now free to use any of A0-A15 as scratch registers
1084 * Grab the SFRs and user registers first. We use A3 as a scratch register. */
1085 for (unsigned int i = 0; i < reg_list_size; i++) {
1086 struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
1087 unsigned int ridx = (i < XT_NUM_REGS) ? i : i - XT_NUM_REGS;
1088 if (xtensa_reg_is_readable(rlist[ridx].flags, cpenable) && rlist[ridx].exist) {
1089 bool reg_fetched = true;
1090 unsigned int reg_num = rlist[ridx].reg_num;
1091 switch (rlist[ridx].type) {
1093 xtensa_queue_exec_ins(xtensa, XT_INS_RUR(xtensa, reg_num, XT_REG_A3));
1096 xtensa_queue_exec_ins(xtensa, XT_INS_RFR(xtensa, reg_num, XT_REG_A3));
1098 case XT_REG_SPECIAL:
1099 if (reg_num == XT_PC_REG_NUM_VIRTUAL) {
1100 /* reg number of PC for debug interrupt depends on NDEBUGLEVEL */
1101 reg_num = (XT_PC_REG_NUM_BASE + xtensa->core_config->debug.irq_level);
1102 } else if (reg_num == xtensa_regs[XT_REG_IDX_CPENABLE].reg_num) {
1103 /* CPENABLE already read/updated; don't re-read */
1104 reg_fetched = false;
1107 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, reg_num, XT_REG_A3));
1110 reg_fetched = false;
1113 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
1114 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, regvals[i].buf);
1116 xtensa_queue_dbg_reg_read(xtensa, NARADR_DSR, dsrs[i].buf);
1120 /* Ok, send the whole mess to the CPU. */
1121 res = jtag_execute_queue();
1122 if (res != ERROR_OK) {
1123 LOG_ERROR("Failed to fetch AR regs!");
1124 goto xtensa_fetch_all_regs_done;
1126 xtensa_core_status_check(target);
1129 /* DSR checking: follows order in which registers are requested. */
1130 for (unsigned int i = 0; i < reg_list_size; i++) {
1131 struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
1132 unsigned int ridx = (i < XT_NUM_REGS) ? i : i - XT_NUM_REGS;
1133 if (xtensa_reg_is_readable(rlist[ridx].flags, cpenable) && rlist[ridx].exist &&
1134 (rlist[ridx].type != XT_REG_DEBUG) &&
1135 (rlist[ridx].type != XT_REG_RELGEN) &&
1136 (rlist[ridx].type != XT_REG_TIE) &&
1137 (rlist[ridx].type != XT_REG_OTHER)) {
1138 if (buf_get_u32(dsrs[i].buf, 0, 32) & OCDDSR_EXECEXCEPTION) {
1139 LOG_ERROR("Exception reading %s!", reg_list[i].name);
1141 goto xtensa_fetch_all_regs_done;
1147 if (xtensa->core_config->windowed)
1148 /* We need the windowbase to decode the general addresses. */
1149 windowbase = buf_get_u32(regvals[XT_REG_IDX_WINDOWBASE].buf, 0, 32);
1150 /* Decode the result and update the cache. */
1151 for (unsigned int i = 0; i < reg_list_size; i++) {
1152 struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
1153 unsigned int ridx = (i < XT_NUM_REGS) ? i : i - XT_NUM_REGS;
1154 if (xtensa_reg_is_readable(rlist[ridx].flags, cpenable) && rlist[ridx].exist) {
1155 if ((xtensa->core_config->windowed) && (rlist[ridx].type == XT_REG_GENERAL)) {
1156 /* The 64-value general register set is read from (windowbase) on down.
1157 * We need to get the real register address by subtracting windowbase and
1158 * wrapping around. */
1159 enum xtensa_reg_id realadr = xtensa_canonical_to_windowbase_offset(xtensa, i,
1161 buf_cpy(regvals[realadr].buf, reg_list[i].value, reg_list[i].size);
1162 } else if (rlist[ridx].type == XT_REG_RELGEN) {
1163 buf_cpy(regvals[rlist[ridx].reg_num].buf, reg_list[i].value, reg_list[i].size);
1164 if (xtensa_extra_debug_log) {
1165 xtensa_reg_val_t regval = buf_get_u32(regvals[rlist[ridx].reg_num].buf, 0, 32);
1166 LOG_DEBUG("%s = 0x%x", rlist[ridx].name, regval);
1169 xtensa_reg_val_t regval = buf_get_u32(regvals[i].buf, 0, 32);
1170 bool is_dirty = (i == XT_REG_IDX_CPENABLE);
1171 if (xtensa_extra_debug_log)
1172 LOG_INFO("Register %s: 0x%X", reg_list[i].name, regval);
1173 xtensa_reg_set(target, i, regval);
1174 reg_list[i].dirty = is_dirty; /*always do this _after_ xtensa_reg_set! */
1176 reg_list[i].valid = true;
1178 if ((rlist[ridx].flags & XT_REGF_MASK) == XT_REGF_NOREAD) {
1179 /* Report read-only registers all-zero but valid */
1180 reg_list[i].valid = true;
1181 xtensa_reg_set(target, i, 0);
1183 reg_list[i].valid = false;
1188 if (xtensa->core_config->windowed) {
1189 /* We have used A3 as a scratch register.
1190 * Windowed configs: restore A3's AR (XT_REG_GENERAL) and and flag for write-back.
1192 enum xtensa_reg_id ar3_idx = xtensa_windowbase_offset_to_canonical(xtensa, XT_REG_IDX_A3, windowbase);
1193 xtensa_reg_set(target, ar3_idx, a3);
1194 xtensa_mark_register_dirty(xtensa, ar3_idx);
1196 /* Reset scratch_ars[] on fetch. .chrval tracks AR mapping and changes w/ window */
1197 sprintf(xtensa->scratch_ars[XT_AR_SCRATCH_AR3].chrval, "ar%d", ar3_idx - XT_REG_IDX_AR0);
1198 enum xtensa_reg_id ar4_idx = xtensa_windowbase_offset_to_canonical(xtensa, XT_REG_IDX_A4, windowbase);
1199 sprintf(xtensa->scratch_ars[XT_AR_SCRATCH_AR4].chrval, "ar%d", ar4_idx - XT_REG_IDX_AR0);
1200 for (enum xtensa_ar_scratch_set_e s = 0; s < XT_AR_SCRATCH_NUM; s++)
1201 xtensa->scratch_ars[s].intval = false;
1204 /* We have used A3 (XT_REG_RELGEN) as a scratch register. Restore and flag for write-back. */
1205 xtensa_reg_set(target, XT_REG_IDX_A3, a3);
1206 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A3);
1207 xtensa->regs_fetched = true;
1208 xtensa_fetch_all_regs_done:
1214 int xtensa_get_gdb_reg_list(struct target *target,
1215 struct reg **reg_list[],
1217 enum target_register_class reg_class)
1219 struct xtensa *xtensa = target_to_xtensa(target);
1220 unsigned int num_regs;
1222 if (reg_class == REG_CLASS_GENERAL) {
1223 if ((xtensa->genpkt_regs_num == 0) || !xtensa->contiguous_regs_list) {
1224 LOG_ERROR("reg_class %d unhandled; 'xtgregs' not found", reg_class);
1227 num_regs = xtensa->genpkt_regs_num;
1229 /* Determine whether to return a contiguous or sparse register map */
1230 num_regs = xtensa->regmap_contiguous ? xtensa->total_regs_num : xtensa->dbregs_num;
1233 LOG_DEBUG("reg_class=%i, num_regs=%d", (int)reg_class, num_regs);
1235 *reg_list = calloc(num_regs, sizeof(struct reg *));
1239 *reg_list_size = num_regs;
1240 if (xtensa->regmap_contiguous) {
1241 assert((num_regs <= xtensa->total_regs_num) && "contiguous regmap size internal error!");
1242 for (unsigned int i = 0; i < num_regs; i++)
1243 (*reg_list)[i] = xtensa->contiguous_regs_list[i];
1247 for (unsigned int i = 0; i < num_regs; i++)
1248 (*reg_list)[i] = (struct reg *)&xtensa->empty_regs[i];
1250 for (unsigned int i = 0; i < xtensa->core_cache->num_regs && k < num_regs; i++) {
1251 if (xtensa->core_cache->reg_list[i].exist) {
1252 struct xtensa_reg_desc *rlist = (i < XT_NUM_REGS) ? xtensa_regs : xtensa->optregs;
1253 unsigned int ridx = (i < XT_NUM_REGS) ? i : i - XT_NUM_REGS;
1254 int sparse_idx = rlist[ridx].dbreg_num;
1255 if (i == XT_REG_IDX_PS) {
1256 if (xtensa->eps_dbglevel_idx == 0) {
1257 LOG_ERROR("eps_dbglevel_idx not set\n");
1260 (*reg_list)[sparse_idx] = &xtensa->core_cache->reg_list[xtensa->eps_dbglevel_idx];
1261 if (xtensa_extra_debug_log)
1262 LOG_DEBUG("SPARSE GDB reg 0x%x getting EPS%d 0x%x",
1263 sparse_idx, xtensa->core_config->debug.irq_level,
1264 xtensa_reg_get_value((*reg_list)[sparse_idx]));
1265 } else if (rlist[ridx].type == XT_REG_RELGEN) {
1266 (*reg_list)[sparse_idx - XT_REG_IDX_ARFIRST] = &xtensa->core_cache->reg_list[i];
1268 (*reg_list)[sparse_idx] = &xtensa->core_cache->reg_list[i];
1270 if (i == XT_REG_IDX_PC)
1271 /* Make a duplicate copy of PC for external access */
1272 (*reg_list)[XT_PC_DBREG_NUM_BASE] = &xtensa->core_cache->reg_list[i];
1278 LOG_ERROR("SPARSE GDB reg list full (size %d)", k);
1283 int xtensa_mmu_is_enabled(struct target *target, int *enabled)
1285 struct xtensa *xtensa = target_to_xtensa(target);
1286 *enabled = xtensa->core_config->mmu.itlb_entries_count > 0 ||
1287 xtensa->core_config->mmu.dtlb_entries_count > 0;
1291 int xtensa_halt(struct target *target)
1293 struct xtensa *xtensa = target_to_xtensa(target);
1295 LOG_TARGET_DEBUG(target, "start");
1296 if (target->state == TARGET_HALTED) {
1297 LOG_TARGET_DEBUG(target, "target was already halted");
1300 /* First we have to read dsr and check if the target stopped */
1301 int res = xtensa_dm_core_status_read(&xtensa->dbg_mod);
1302 if (res != ERROR_OK) {
1303 LOG_TARGET_ERROR(target, "Failed to read core status!");
1306 LOG_TARGET_DEBUG(target, "Core status 0x%" PRIx32, xtensa_dm_core_status_get(&xtensa->dbg_mod));
1307 if (!xtensa_is_stopped(target)) {
1308 xtensa_queue_dbg_reg_write(xtensa, NARADR_DCRSET, OCDDCR_ENABLEOCD | OCDDCR_DEBUGINTERRUPT);
1309 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
1310 res = jtag_execute_queue();
1311 if (res != ERROR_OK)
1312 LOG_TARGET_ERROR(target, "Failed to set OCDDCR_DEBUGINTERRUPT. Can't halt.");
1318 int xtensa_prepare_resume(struct target *target,
1320 target_addr_t address,
1321 int handle_breakpoints,
1322 int debug_execution)
1324 struct xtensa *xtensa = target_to_xtensa(target);
1327 LOG_TARGET_DEBUG(target,
1328 "current=%d address=" TARGET_ADDR_FMT ", handle_breakpoints=%i, debug_execution=%i)",
1334 if (target->state != TARGET_HALTED) {
1335 LOG_TARGET_WARNING(target, "target not halted");
1336 return ERROR_TARGET_NOT_HALTED;
1339 if (address && !current) {
1340 xtensa_reg_set(target, XT_REG_IDX_PC, address);
1342 uint32_t cause = xtensa_cause_get(target);
1343 LOG_TARGET_DEBUG(target, "DEBUGCAUSE 0x%x (watchpoint %lu) (break %lu)",
1344 cause, (cause & DEBUGCAUSE_DB), (cause & (DEBUGCAUSE_BI | DEBUGCAUSE_BN)));
1345 if (cause & DEBUGCAUSE_DB)
1346 /* We stopped due to a watchpoint. We can't just resume executing the
1347 * instruction again because */
1348 /* that would trigger the watchpoint again. To fix this, we single-step,
1349 * which ignores watchpoints. */
1350 xtensa_do_step(target, current, address, handle_breakpoints);
1351 if (cause & (DEBUGCAUSE_BI | DEBUGCAUSE_BN))
1352 /* We stopped due to a break instruction. We can't just resume executing the
1353 * instruction again because */
1354 /* that would trigger the break again. To fix this, we single-step, which
1356 xtensa_do_step(target, current, address, handle_breakpoints);
1359 /* Write back hw breakpoints. Current FreeRTOS SMP code can set a hw breakpoint on an
1360 * exception; we need to clear that and return to the breakpoints gdb has set on resume. */
1361 for (unsigned int slot = 0; slot < xtensa->core_config->debug.ibreaks_num; slot++) {
1362 if (xtensa->hw_brps[slot]) {
1363 /* Write IBREAKA[slot] and set bit #slot in IBREAKENABLE */
1364 xtensa_reg_set(target, XT_REG_IDX_IBREAKA0 + slot, xtensa->hw_brps[slot]->address);
1368 xtensa_reg_set(target, XT_REG_IDX_IBREAKENABLE, bpena);
1370 /* Here we write all registers to the targets */
1371 int res = xtensa_write_dirty_registers(target);
1372 if (res != ERROR_OK)
1373 LOG_TARGET_ERROR(target, "Failed to write back register cache.");
1377 int xtensa_do_resume(struct target *target)
1379 struct xtensa *xtensa = target_to_xtensa(target);
1381 LOG_TARGET_DEBUG(target, "start");
1383 xtensa_queue_exec_ins(xtensa, XT_INS_RFDO(xtensa));
1384 int res = jtag_execute_queue();
1385 if (res != ERROR_OK) {
1386 LOG_TARGET_ERROR(target, "Failed to exec RFDO %d!", res);
1389 xtensa_core_status_check(target);
1393 int xtensa_resume(struct target *target,
1395 target_addr_t address,
1396 int handle_breakpoints,
1397 int debug_execution)
1399 LOG_TARGET_DEBUG(target, "start");
1400 int res = xtensa_prepare_resume(target, current, address, handle_breakpoints, debug_execution);
1401 if (res != ERROR_OK) {
1402 LOG_TARGET_ERROR(target, "Failed to prepare for resume!");
1405 res = xtensa_do_resume(target);
1406 if (res != ERROR_OK) {
1407 LOG_TARGET_ERROR(target, "Failed to resume!");
1411 target->debug_reason = DBG_REASON_NOTHALTED;
1412 if (!debug_execution)
1413 target->state = TARGET_RUNNING;
1415 target->state = TARGET_DEBUG_RUNNING;
1417 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1422 static bool xtensa_pc_in_winexc(struct target *target, target_addr_t pc)
1424 struct xtensa *xtensa = target_to_xtensa(target);
1425 uint8_t insn_buf[XT_ISNS_SZ_MAX];
1426 int err = xtensa_read_buffer(target, pc, sizeof(insn_buf), insn_buf);
1427 if (err != ERROR_OK)
1430 xtensa_insn_t insn = buf_get_u32(insn_buf, 0, 24);
1431 xtensa_insn_t masked = insn & XT_INS_L32E_S32E_MASK(xtensa);
1432 if (masked == XT_INS_L32E(xtensa, 0, 0, 0) || masked == XT_INS_S32E(xtensa, 0, 0, 0))
1435 masked = insn & XT_INS_RFWO_RFWU_MASK(xtensa);
1436 if (masked == XT_INS_RFWO(xtensa) || masked == XT_INS_RFWU(xtensa))
1442 int xtensa_do_step(struct target *target, int current, target_addr_t address, int handle_breakpoints)
1444 struct xtensa *xtensa = target_to_xtensa(target);
1446 const uint32_t icount_val = -2; /* ICOUNT value to load for 1 step */
1447 xtensa_reg_val_t dbreakc[XT_WATCHPOINTS_NUM_MAX];
1448 xtensa_reg_val_t icountlvl, cause;
1449 xtensa_reg_val_t oldps, oldpc, cur_pc;
1450 bool ps_lowered = false;
1452 LOG_TARGET_DEBUG(target, "current=%d, address=" TARGET_ADDR_FMT ", handle_breakpoints=%i",
1453 current, address, handle_breakpoints);
1455 if (target->state != TARGET_HALTED) {
1456 LOG_TARGET_WARNING(target, "target not halted");
1457 return ERROR_TARGET_NOT_HALTED;
1460 if (xtensa->eps_dbglevel_idx == 0) {
1461 LOG_ERROR("eps_dbglevel_idx not set\n");
1465 /* Save old ps (EPS[dbglvl] on LX), pc */
1466 oldps = xtensa_reg_get(target, xtensa->eps_dbglevel_idx);
1467 oldpc = xtensa_reg_get(target, XT_REG_IDX_PC);
1469 cause = xtensa_cause_get(target);
1470 LOG_TARGET_DEBUG(target, "oldps=%" PRIx32 ", oldpc=%" PRIx32 " dbg_cause=%" PRIx32 " exc_cause=%" PRIx32,
1474 xtensa_reg_get(target, XT_REG_IDX_EXCCAUSE));
1475 if (handle_breakpoints && (cause & (DEBUGCAUSE_BI | DEBUGCAUSE_BN))) {
1476 /* handle hard-coded SW breakpoints (e.g. syscalls) */
1477 LOG_TARGET_DEBUG(target, "Increment PC to pass break instruction...");
1478 xtensa_cause_clear(target); /* so we don't recurse into the same routine */
1479 /* pretend that we have stepped */
1480 if (cause & DEBUGCAUSE_BI)
1481 xtensa_reg_set(target, XT_REG_IDX_PC, oldpc + 3); /* PC = PC+3 */
1483 xtensa_reg_set(target, XT_REG_IDX_PC, oldpc + 2); /* PC = PC+2 */
1487 /* Xtensa LX has an ICOUNTLEVEL register which sets the maximum interrupt level
1488 * at which the instructions are to be counted while stepping.
1490 * For example, if we need to step by 2 instructions, and an interrupt occurs
1491 * in between, the processor will trigger the interrupt and halt after the 2nd
1492 * instruction within the interrupt vector and/or handler.
1494 * However, sometimes we don't want the interrupt handlers to be executed at all
1495 * while stepping through the code. In this case (XT_STEPPING_ISR_OFF),
1496 * ICOUNTLEVEL can be lowered to the executing code's (level + 1) to prevent ISR
1497 * code from being counted during stepping. Note that C exception handlers must
1498 * run at level 0 and hence will be counted and stepped into, should one occur.
1500 * TODO: Certain instructions should never be single-stepped and should instead
1501 * be emulated (per DUG): RSIL >= DBGLEVEL, RSR/WSR [ICOUNT|ICOUNTLEVEL], and
1504 if (xtensa->stepping_isr_mode == XT_STEPPING_ISR_OFF) {
1505 if (!xtensa->core_config->high_irq.enabled) {
1508 "disabling IRQs while stepping is not implemented w/o high prio IRQs option!");
1511 /* Update ICOUNTLEVEL accordingly */
1512 icountlvl = MIN((oldps & 0xF) + 1, xtensa->core_config->debug.irq_level);
1514 icountlvl = xtensa->core_config->debug.irq_level;
1517 if (cause & DEBUGCAUSE_DB) {
1518 /* We stopped due to a watchpoint. We can't just resume executing the instruction again because
1519 * that would trigger the watchpoint again. To fix this, we remove watchpoints,single-step and
1520 * re-enable the watchpoint. */
1523 "Single-stepping to get past instruction that triggered the watchpoint...");
1524 xtensa_cause_clear(target); /* so we don't recurse into the same routine */
1525 /* Save all DBREAKCx registers and set to 0 to disable watchpoints */
1526 for (unsigned int slot = 0; slot < xtensa->core_config->debug.dbreaks_num; slot++) {
1527 dbreakc[slot] = xtensa_reg_get(target, XT_REG_IDX_DBREAKC0 + slot);
1528 xtensa_reg_set(target, XT_REG_IDX_DBREAKC0 + slot, 0);
1532 if (!handle_breakpoints && (cause & (DEBUGCAUSE_BI | DEBUGCAUSE_BN)))
1533 /* handle normal SW breakpoint */
1534 xtensa_cause_clear(target); /* so we don't recurse into the same routine */
1535 if ((oldps & 0xf) >= icountlvl) {
1536 /* Lower interrupt level to allow stepping, but flag eps[dbglvl] to be restored */
1538 uint32_t newps = (oldps & ~0xf) | (icountlvl - 1);
1539 xtensa_reg_set(target, xtensa->eps_dbglevel_idx, newps);
1540 LOG_TARGET_DEBUG(target,
1541 "Lowering PS.INTLEVEL to allow stepping: %s <- 0x%08" PRIx32 " (was 0x%08" PRIx32 ")",
1542 xtensa->core_cache->reg_list[xtensa->eps_dbglevel_idx].name,
1547 xtensa_reg_set(target, XT_REG_IDX_ICOUNTLEVEL, icountlvl);
1548 xtensa_reg_set(target, XT_REG_IDX_ICOUNT, icount_val);
1550 /* Now ICOUNT is set, we can resume as if we were going to run */
1551 res = xtensa_prepare_resume(target, current, address, 0, 0);
1552 if (res != ERROR_OK) {
1553 LOG_TARGET_ERROR(target, "Failed to prepare resume for single step");
1556 res = xtensa_do_resume(target);
1557 if (res != ERROR_OK) {
1558 LOG_TARGET_ERROR(target, "Failed to resume after setting up single step");
1562 /* Wait for stepping to complete */
1563 long long start = timeval_ms();
1564 while (timeval_ms() < start + 500) {
1565 /* Do not use target_poll here, it also triggers other things... just manually read the DSR
1566 *until stepping is complete. */
1568 res = xtensa_dm_core_status_read(&xtensa->dbg_mod);
1569 if (res != ERROR_OK) {
1570 LOG_TARGET_ERROR(target, "Failed to read core status!");
1573 if (xtensa_is_stopped(target))
1577 LOG_TARGET_DEBUG(target, "Finish stepping. dsr=0x%08" PRIx32,
1578 xtensa_dm_core_status_get(&xtensa->dbg_mod));
1579 if (!xtensa_is_stopped(target)) {
1582 "Timed out waiting for target to finish stepping. dsr=0x%08" PRIx32,
1583 xtensa_dm_core_status_get(&xtensa->dbg_mod));
1584 target->debug_reason = DBG_REASON_NOTHALTED;
1585 target->state = TARGET_RUNNING;
1588 target->debug_reason = DBG_REASON_SINGLESTEP;
1589 target->state = TARGET_HALTED;
1591 xtensa_fetch_all_regs(target);
1593 cur_pc = xtensa_reg_get(target, XT_REG_IDX_PC);
1595 LOG_TARGET_DEBUG(target,
1596 "cur_ps=%" PRIx32 ", cur_pc=%" PRIx32 " dbg_cause=%" PRIx32 " exc_cause=%" PRIx32,
1597 xtensa_reg_get(target, XT_REG_IDX_PS),
1599 xtensa_cause_get(target),
1600 xtensa_reg_get(target, XT_REG_IDX_EXCCAUSE));
1602 /* Do not step into WindowOverflow if ISRs are masked.
1603 If we stop in WindowOverflow at breakpoint with masked ISRs and
1604 try to do a step it will get us out of that handler */
1605 if (xtensa->core_config->windowed &&
1606 xtensa->stepping_isr_mode == XT_STEPPING_ISR_OFF &&
1607 xtensa_pc_in_winexc(target, cur_pc)) {
1608 /* isrmask = on, need to step out of the window exception handler */
1609 LOG_DEBUG("Stepping out of window exception, PC=%" PRIX32, cur_pc);
1611 address = oldpc + 3;
1615 if (oldpc == cur_pc)
1616 LOG_TARGET_WARNING(target, "Stepping doesn't seem to change PC! dsr=0x%08" PRIx32,
1617 xtensa_dm_core_status_get(&xtensa->dbg_mod));
1619 LOG_DEBUG("Stepped from %" PRIX32 " to %" PRIX32, oldpc, cur_pc);
1622 LOG_DEBUG("Done stepping, PC=%" PRIX32, cur_pc);
1624 if (cause & DEBUGCAUSE_DB) {
1625 LOG_TARGET_DEBUG(target, "...Done, re-installing watchpoints.");
1626 /* Restore the DBREAKCx registers */
1627 for (unsigned int slot = 0; slot < xtensa->core_config->debug.dbreaks_num; slot++)
1628 xtensa_reg_set(target, XT_REG_IDX_DBREAKC0 + slot, dbreakc[slot]);
1631 /* Restore int level */
1633 LOG_DEBUG("Restoring %s after stepping: 0x%08" PRIx32,
1634 xtensa->core_cache->reg_list[xtensa->eps_dbglevel_idx].name,
1636 xtensa_reg_set(target, xtensa->eps_dbglevel_idx, oldps);
1639 /* write ICOUNTLEVEL back to zero */
1640 xtensa_reg_set(target, XT_REG_IDX_ICOUNTLEVEL, 0);
1641 /* TODO: can we skip writing dirty registers and re-fetching them? */
1642 res = xtensa_write_dirty_registers(target);
1643 xtensa_fetch_all_regs(target);
1647 int xtensa_step(struct target *target, int current, target_addr_t address, int handle_breakpoints)
1649 return xtensa_do_step(target, current, address, handle_breakpoints);
1653 * Returns true if two ranges are overlapping
1655 static inline bool xtensa_memory_regions_overlap(target_addr_t r1_start,
1656 target_addr_t r1_end,
1657 target_addr_t r2_start,
1658 target_addr_t r2_end)
1660 if ((r2_start >= r1_start) && (r2_start < r1_end))
1661 return true; /* r2_start is in r1 region */
1662 if ((r2_end > r1_start) && (r2_end <= r1_end))
1663 return true; /* r2_end is in r1 region */
1668 * Returns a size of overlapped region of two ranges.
1670 static inline target_addr_t xtensa_get_overlap_size(target_addr_t r1_start,
1671 target_addr_t r1_end,
1672 target_addr_t r2_start,
1673 target_addr_t r2_end)
1675 if (xtensa_memory_regions_overlap(r1_start, r1_end, r2_start, r2_end)) {
1676 target_addr_t ov_start = r1_start < r2_start ? r2_start : r1_start;
1677 target_addr_t ov_end = r1_end > r2_end ? r2_end : r1_end;
1678 return ov_end - ov_start;
1684 * Check if the address gets to memory regions, and its access mode
1686 static bool xtensa_memory_op_validate_range(struct xtensa *xtensa, target_addr_t address, size_t size, int access)
1688 target_addr_t adr_pos = address; /* address cursor set to the beginning start */
1689 target_addr_t adr_end = address + size; /* region end */
1690 target_addr_t overlap_size;
1691 const struct xtensa_local_mem_region_config *cm; /* current mem region */
1693 while (adr_pos < adr_end) {
1694 cm = xtensa_target_memory_region_find(xtensa, adr_pos);
1695 if (!cm) /* address is not belong to anything */
1697 if ((cm->access & access) != access) /* access check */
1699 overlap_size = xtensa_get_overlap_size(cm->base, (cm->base + cm->size), adr_pos, adr_end);
1700 assert(overlap_size != 0);
1701 adr_pos += overlap_size;
1706 int xtensa_read_memory(struct target *target, target_addr_t address, uint32_t size, uint32_t count, uint8_t *buffer)
1708 struct xtensa *xtensa = target_to_xtensa(target);
1709 /* We are going to read memory in 32-bit increments. This may not be what the calling
1710 * function expects, so we may need to allocate a temp buffer and read into that first. */
1711 target_addr_t addrstart_al = ALIGN_DOWN(address, 4);
1712 target_addr_t addrend_al = ALIGN_UP(address + size * count, 4);
1713 target_addr_t adr = addrstart_al;
1715 bool bswap = xtensa->target->endianness == TARGET_BIG_ENDIAN;
1717 if (target->state != TARGET_HALTED) {
1718 LOG_TARGET_WARNING(target, "target not halted");
1719 return ERROR_TARGET_NOT_HALTED;
1722 if (!xtensa->permissive_mode) {
1723 if (!xtensa_memory_op_validate_range(xtensa, address, (size * count),
1724 XT_MEM_ACCESS_READ)) {
1725 LOG_DEBUG("address " TARGET_ADDR_FMT " not readable", address);
1730 if (addrstart_al == address && addrend_al == address + (size * count)) {
1733 albuff = malloc(addrend_al - addrstart_al);
1735 LOG_TARGET_ERROR(target, "Out of memory allocating %" TARGET_PRIdADDR " bytes!",
1736 addrend_al - addrstart_al);
1737 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1741 /* We're going to use A3 here */
1742 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A3);
1743 /* Write start address to A3 */
1744 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, addrstart_al);
1745 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1746 /* Now we can safely read data from addrstart_al up to addrend_al into albuff */
1747 if (xtensa->probe_lsddr32p != 0) {
1748 xtensa_queue_exec_ins(xtensa, XT_INS_LDDR32P(xtensa, XT_REG_A3));
1749 for (unsigned int i = 0; adr != addrend_al; i += sizeof(uint32_t), adr += sizeof(uint32_t))
1750 xtensa_queue_dbg_reg_read(xtensa,
1751 (adr + sizeof(uint32_t) == addrend_al) ? NARADR_DDR : NARADR_DDREXEC,
1754 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A4);
1755 for (unsigned int i = 0; adr != addrend_al; i += sizeof(uint32_t), adr += sizeof(uint32_t)) {
1756 xtensa_queue_exec_ins(xtensa, XT_INS_L32I(xtensa, XT_REG_A3, XT_REG_A4, 0));
1757 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A4));
1758 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, &albuff[i]);
1759 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, adr + sizeof(uint32_t));
1760 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1763 int res = jtag_execute_queue();
1764 if (res == ERROR_OK) {
1765 bool prev_suppress = xtensa->suppress_dsr_errors;
1766 xtensa->suppress_dsr_errors = true;
1767 res = xtensa_core_status_check(target);
1768 if (xtensa->probe_lsddr32p == -1)
1769 xtensa->probe_lsddr32p = 1;
1770 xtensa->suppress_dsr_errors = prev_suppress;
1772 if (res != ERROR_OK) {
1773 if (xtensa->probe_lsddr32p != 0) {
1774 /* Disable fast memory access instructions and retry before reporting an error */
1775 LOG_TARGET_INFO(target, "Disabling LDDR32.P/SDDR32.P");
1776 xtensa->probe_lsddr32p = 0;
1777 res = xtensa_read_memory(target, address, size, count, buffer);
1780 LOG_TARGET_WARNING(target, "Failed reading %d bytes at address "TARGET_ADDR_FMT,
1781 count * size, address);
1786 buf_bswap32(albuff, albuff, addrend_al - addrstart_al);
1787 if (albuff != buffer) {
1788 memcpy(buffer, albuff + (address & 3), (size * count));
1795 int xtensa_read_buffer(struct target *target, target_addr_t address, uint32_t count, uint8_t *buffer)
1797 /* xtensa_read_memory can also read unaligned stuff. Just pass through to that routine. */
1798 return xtensa_read_memory(target, address, 1, count, buffer);
1801 int xtensa_write_memory(struct target *target,
1802 target_addr_t address,
1805 const uint8_t *buffer)
1807 /* This memory write function can get thrown nigh everything into it, from
1808 * aligned uint32 writes to unaligned uint8ths. The Xtensa memory doesn't always
1809 * accept anything but aligned uint32 writes, though. That is why we convert
1810 * everything into that. */
1811 struct xtensa *xtensa = target_to_xtensa(target);
1812 target_addr_t addrstart_al = ALIGN_DOWN(address, 4);
1813 target_addr_t addrend_al = ALIGN_UP(address + size * count, 4);
1814 target_addr_t adr = addrstart_al;
1817 bool fill_head_tail = false;
1819 if (target->state != TARGET_HALTED) {
1820 LOG_TARGET_WARNING(target, "target not halted");
1821 return ERROR_TARGET_NOT_HALTED;
1824 if (!xtensa->permissive_mode) {
1825 if (!xtensa_memory_op_validate_range(xtensa, address, (size * count), XT_MEM_ACCESS_WRITE)) {
1826 LOG_WARNING("address " TARGET_ADDR_FMT " not writable", address);
1831 if (size == 0 || count == 0 || !buffer)
1832 return ERROR_COMMAND_SYNTAX_ERROR;
1834 /* Allocate a temporary buffer to put the aligned bytes in, if needed. */
1835 if (addrstart_al == address && addrend_al == address + (size * count)) {
1836 if (xtensa->target->endianness == TARGET_BIG_ENDIAN)
1837 /* Need a buffer for byte-swapping */
1838 albuff = malloc(addrend_al - addrstart_al);
1840 /* We discard the const here because albuff can also be non-const */
1841 albuff = (uint8_t *)buffer;
1843 fill_head_tail = true;
1844 albuff = malloc(addrend_al - addrstart_al);
1847 LOG_TARGET_ERROR(target, "Out of memory allocating %" TARGET_PRIdADDR " bytes!",
1848 addrend_al - addrstart_al);
1849 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1852 /* We're going to use A3 here */
1853 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A3);
1855 /* If we're using a temp aligned buffer, we need to fill the head and/or tail bit of it. */
1856 if (fill_head_tail) {
1857 /* See if we need to read the first and/or last word. */
1859 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, addrstart_al);
1860 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1861 if (xtensa->probe_lsddr32p == 1) {
1862 xtensa_queue_exec_ins(xtensa, XT_INS_LDDR32P(xtensa, XT_REG_A3));
1864 xtensa_queue_exec_ins(xtensa, XT_INS_L32I(xtensa, XT_REG_A3, XT_REG_A3, 0));
1865 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
1867 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR, &albuff[0]);
1869 if ((address + (size * count)) & 3) {
1870 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, addrend_al - 4);
1871 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1872 if (xtensa->probe_lsddr32p == 1) {
1873 xtensa_queue_exec_ins(xtensa, XT_INS_LDDR32P(xtensa, XT_REG_A3));
1875 xtensa_queue_exec_ins(xtensa, XT_INS_L32I(xtensa, XT_REG_A3, XT_REG_A3, 0));
1876 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa, XT_SR_DDR, XT_REG_A3));
1878 xtensa_queue_dbg_reg_read(xtensa, NARADR_DDR,
1879 &albuff[addrend_al - addrstart_al - 4]);
1882 res = jtag_execute_queue();
1883 if (res != ERROR_OK) {
1884 LOG_ERROR("Error issuing unaligned memory write context instruction(s): %d", res);
1885 if (albuff != buffer)
1889 xtensa_core_status_check(target);
1890 if (xtensa->target->endianness == TARGET_BIG_ENDIAN) {
1891 bool swapped_w0 = false;
1893 buf_bswap32(&albuff[0], &albuff[0], 4);
1896 if ((address + (size * count)) & 3) {
1897 if ((addrend_al - addrstart_al - 4 == 0) && swapped_w0) {
1898 /* Don't double-swap if buffer start/end are within the same word */
1900 buf_bswap32(&albuff[addrend_al - addrstart_al - 4],
1901 &albuff[addrend_al - addrstart_al - 4], 4);
1905 /* Copy data to be written into the aligned buffer (in host-endianness) */
1906 memcpy(&albuff[address & 3], buffer, size * count);
1907 /* Now we can write albuff in aligned uint32s. */
1910 if (xtensa->target->endianness == TARGET_BIG_ENDIAN)
1911 buf_bswap32(albuff, fill_head_tail ? albuff : buffer, addrend_al - addrstart_al);
1913 /* Write start address to A3 */
1914 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, addrstart_al);
1915 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1916 /* Write the aligned buffer */
1917 if (xtensa->probe_lsddr32p != 0) {
1918 for (unsigned int i = 0; adr != addrend_al; i += sizeof(uint32_t), adr += sizeof(uint32_t)) {
1920 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, buf_get_u32(&albuff[i], 0, 32));
1921 xtensa_queue_exec_ins(xtensa, XT_INS_SDDR32P(xtensa, XT_REG_A3));
1923 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDREXEC, buf_get_u32(&albuff[i], 0, 32));
1927 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A4);
1928 for (unsigned int i = 0; adr != addrend_al; i += sizeof(uint32_t), adr += sizeof(uint32_t)) {
1929 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, buf_get_u32(&albuff[i], 0, 32));
1930 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A4));
1931 xtensa_queue_exec_ins(xtensa, XT_INS_S32I(xtensa, XT_REG_A3, XT_REG_A4, 0));
1932 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, adr + sizeof(uint32_t));
1933 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1937 res = jtag_execute_queue();
1938 if (res == ERROR_OK) {
1939 bool prev_suppress = xtensa->suppress_dsr_errors;
1940 xtensa->suppress_dsr_errors = true;
1941 res = xtensa_core_status_check(target);
1942 if (xtensa->probe_lsddr32p == -1)
1943 xtensa->probe_lsddr32p = 1;
1944 xtensa->suppress_dsr_errors = prev_suppress;
1946 if (res != ERROR_OK) {
1947 if (xtensa->probe_lsddr32p != 0) {
1948 /* Disable fast memory access instructions and retry before reporting an error */
1949 LOG_TARGET_INFO(target, "Disabling LDDR32.P/SDDR32.P");
1950 xtensa->probe_lsddr32p = 0;
1951 res = xtensa_write_memory(target, address, size, count, buffer);
1953 LOG_TARGET_WARNING(target, "Failed writing %d bytes at address "TARGET_ADDR_FMT,
1954 count * size, address);
1957 /* Invalidate ICACHE, writeback DCACHE if present */
1958 uint32_t issue_ihi = xtensa_is_icacheable(xtensa, address);
1959 uint32_t issue_dhwb = xtensa_is_dcacheable(xtensa, address);
1960 if (issue_ihi || issue_dhwb) {
1961 uint32_t ilinesize = issue_ihi ? xtensa->core_config->icache.line_size : UINT32_MAX;
1962 uint32_t dlinesize = issue_dhwb ? xtensa->core_config->dcache.line_size : UINT32_MAX;
1963 uint32_t linesize = MIN(ilinesize, dlinesize);
1967 while ((adr + off) < addrend_al) {
1969 /* Write start address to A3 */
1970 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, adr);
1971 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
1974 xtensa_queue_exec_ins(xtensa, XT_INS_IHI(xtensa, XT_REG_A3, off));
1976 xtensa_queue_exec_ins(xtensa, XT_INS_DHWBI(xtensa, XT_REG_A3, off));
1979 /* IHI, DHWB have 8-bit immediate operands (0..1020) */
1985 /* Execute cache WB/INV instructions */
1986 res = jtag_execute_queue();
1987 xtensa_core_status_check(target);
1988 if (res != ERROR_OK)
1989 LOG_TARGET_ERROR(target,
1990 "Error issuing cache writeback/invaldate instruction(s): %d",
1994 if (albuff != buffer)
2000 int xtensa_write_buffer(struct target *target, target_addr_t address, uint32_t count, const uint8_t *buffer)
2002 /* xtensa_write_memory can handle everything. Just pass on to that. */
2003 return xtensa_write_memory(target, address, 1, count, buffer);
2006 int xtensa_checksum_memory(struct target *target, target_addr_t address, uint32_t count, uint32_t *checksum)
2008 LOG_WARNING("not implemented yet");
2012 int xtensa_poll(struct target *target)
2014 struct xtensa *xtensa = target_to_xtensa(target);
2016 int res = xtensa_dm_power_status_read(&xtensa->dbg_mod, PWRSTAT_DEBUGWASRESET | PWRSTAT_COREWASRESET);
2017 if (xtensa->dbg_mod.power_status.stat != xtensa->dbg_mod.power_status.stath)
2018 LOG_TARGET_DEBUG(target, "PWRSTAT: read 0x%08" PRIx32 ", clear 0x%08lx, reread 0x%08" PRIx32,
2019 xtensa->dbg_mod.power_status.stat,
2020 PWRSTAT_DEBUGWASRESET | PWRSTAT_COREWASRESET,
2021 xtensa->dbg_mod.power_status.stath);
2022 if (res != ERROR_OK)
2025 if (xtensa_dm_tap_was_reset(&xtensa->dbg_mod)) {
2026 LOG_TARGET_INFO(target, "Debug controller was reset.");
2027 res = xtensa_smpbreak_write(xtensa, xtensa->smp_break);
2028 if (res != ERROR_OK)
2031 if (xtensa_dm_core_was_reset(&xtensa->dbg_mod))
2032 LOG_TARGET_INFO(target, "Core was reset.");
2033 xtensa_dm_power_status_cache(&xtensa->dbg_mod);
2034 /* Enable JTAG, set reset if needed */
2035 res = xtensa_wakeup(target);
2036 if (res != ERROR_OK)
2039 uint32_t prev_dsr = xtensa->dbg_mod.core_status.dsr;
2040 res = xtensa_dm_core_status_read(&xtensa->dbg_mod);
2041 if (res != ERROR_OK)
2043 if (prev_dsr != xtensa->dbg_mod.core_status.dsr)
2044 LOG_TARGET_DEBUG(target,
2045 "DSR has changed: was 0x%08" PRIx32 " now 0x%08" PRIx32,
2047 xtensa->dbg_mod.core_status.dsr);
2048 if (xtensa->dbg_mod.power_status.stath & PWRSTAT_COREWASRESET) {
2049 /* if RESET state is persitent */
2050 target->state = TARGET_RESET;
2051 } else if (!xtensa_dm_is_powered(&xtensa->dbg_mod)) {
2052 LOG_TARGET_DEBUG(target, "not powered 0x%" PRIX32 "%ld",
2053 xtensa->dbg_mod.core_status.dsr,
2054 xtensa->dbg_mod.core_status.dsr & OCDDSR_STOPPED);
2055 target->state = TARGET_UNKNOWN;
2056 if (xtensa->come_online_probes_num == 0)
2057 target->examined = false;
2059 xtensa->come_online_probes_num--;
2060 } else if (xtensa_is_stopped(target)) {
2061 if (target->state != TARGET_HALTED) {
2062 enum target_state oldstate = target->state;
2063 target->state = TARGET_HALTED;
2064 /* Examine why the target has been halted */
2065 target->debug_reason = DBG_REASON_DBGRQ;
2066 xtensa_fetch_all_regs(target);
2067 /* When setting debug reason DEBUGCAUSE events have the following
2068 * priorities: watchpoint == breakpoint > single step > debug interrupt. */
2069 /* Watchpoint and breakpoint events at the same time results in special
2070 * debug reason: DBG_REASON_WPTANDBKPT. */
2071 uint32_t halt_cause = xtensa_cause_get(target);
2072 /* TODO: Add handling of DBG_REASON_EXC_CATCH */
2073 if (halt_cause & DEBUGCAUSE_IC)
2074 target->debug_reason = DBG_REASON_SINGLESTEP;
2075 if (halt_cause & (DEBUGCAUSE_IB | DEBUGCAUSE_BN | DEBUGCAUSE_BI)) {
2076 if (halt_cause & DEBUGCAUSE_DB)
2077 target->debug_reason = DBG_REASON_WPTANDBKPT;
2079 target->debug_reason = DBG_REASON_BREAKPOINT;
2080 } else if (halt_cause & DEBUGCAUSE_DB) {
2081 target->debug_reason = DBG_REASON_WATCHPOINT;
2083 LOG_TARGET_DEBUG(target, "Target halted, pc=0x%08" PRIx32
2084 ", debug_reason=%08" PRIx32 ", oldstate=%08" PRIx32,
2085 xtensa_reg_get(target, XT_REG_IDX_PC),
2086 target->debug_reason,
2088 LOG_TARGET_DEBUG(target, "Halt reason=0x%08" PRIX32 ", exc_cause=%" PRId32 ", dsr=0x%08" PRIx32,
2090 xtensa_reg_get(target, XT_REG_IDX_EXCCAUSE),
2091 xtensa->dbg_mod.core_status.dsr);
2092 xtensa_dm_core_status_clear(
2094 OCDDSR_DEBUGPENDBREAK | OCDDSR_DEBUGINTBREAK | OCDDSR_DEBUGPENDTRAX |
2095 OCDDSR_DEBUGINTTRAX |
2096 OCDDSR_DEBUGPENDHOST | OCDDSR_DEBUGINTHOST);
2099 target->debug_reason = DBG_REASON_NOTHALTED;
2100 if (target->state != TARGET_RUNNING && target->state != TARGET_DEBUG_RUNNING) {
2101 target->state = TARGET_RUNNING;
2102 target->debug_reason = DBG_REASON_NOTHALTED;
2105 if (xtensa->trace_active) {
2106 /* Detect if tracing was active but has stopped. */
2107 struct xtensa_trace_status trace_status;
2108 res = xtensa_dm_trace_status_read(&xtensa->dbg_mod, &trace_status);
2109 if (res == ERROR_OK) {
2110 if (!(trace_status.stat & TRAXSTAT_TRACT)) {
2111 LOG_INFO("Detected end of trace.");
2112 if (trace_status.stat & TRAXSTAT_PCMTG)
2113 LOG_TARGET_INFO(target, "Trace stop triggered by PC match");
2114 if (trace_status.stat & TRAXSTAT_PTITG)
2115 LOG_TARGET_INFO(target, "Trace stop triggered by Processor Trigger Input");
2116 if (trace_status.stat & TRAXSTAT_CTITG)
2117 LOG_TARGET_INFO(target, "Trace stop triggered by Cross-trigger Input");
2118 xtensa->trace_active = false;
2125 static int xtensa_update_instruction(struct target *target, target_addr_t address, uint32_t size, const uint8_t *buffer)
2127 struct xtensa *xtensa = target_to_xtensa(target);
2128 unsigned int issue_ihi = xtensa_is_icacheable(xtensa, address);
2129 unsigned int issue_dhwbi = xtensa_is_dcacheable(xtensa, address);
2130 uint32_t icache_line_size = issue_ihi ? xtensa->core_config->icache.line_size : UINT32_MAX;
2131 uint32_t dcache_line_size = issue_dhwbi ? xtensa->core_config->dcache.line_size : UINT32_MAX;
2132 unsigned int same_ic_line = ((address & (icache_line_size - 1)) + size) <= icache_line_size;
2133 unsigned int same_dc_line = ((address & (dcache_line_size - 1)) + size) <= dcache_line_size;
2136 if (size > icache_line_size)
2139 if (issue_ihi || issue_dhwbi) {
2140 /* We're going to use A3 here */
2141 xtensa_mark_register_dirty(xtensa, XT_REG_IDX_A3);
2143 /* Write start address to A3 and invalidate */
2144 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, address);
2145 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
2146 LOG_TARGET_DEBUG(target, "DHWBI, IHI for address "TARGET_ADDR_FMT, address);
2148 xtensa_queue_exec_ins(xtensa, XT_INS_DHWBI(xtensa, XT_REG_A3, 0));
2149 if (!same_dc_line) {
2150 LOG_TARGET_DEBUG(target,
2151 "DHWBI second dcache line for address "TARGET_ADDR_FMT,
2153 xtensa_queue_exec_ins(xtensa, XT_INS_DHWBI(xtensa, XT_REG_A3, 4));
2157 xtensa_queue_exec_ins(xtensa, XT_INS_IHI(xtensa, XT_REG_A3, 0));
2158 if (!same_ic_line) {
2159 LOG_TARGET_DEBUG(target,
2160 "IHI second icache line for address "TARGET_ADDR_FMT,
2162 xtensa_queue_exec_ins(xtensa, XT_INS_IHI(xtensa, XT_REG_A3, 4));
2166 /* Execute invalidate instructions */
2167 ret = jtag_execute_queue();
2168 xtensa_core_status_check(target);
2169 if (ret != ERROR_OK) {
2170 LOG_ERROR("Error issuing cache invaldate instruction(s): %d", ret);
2175 /* Write new instructions to memory */
2176 ret = target_write_buffer(target, address, size, buffer);
2177 if (ret != ERROR_OK) {
2178 LOG_TARGET_ERROR(target, "Error writing instruction to memory: %d", ret);
2183 /* Flush dcache so instruction propagates. A3 may be corrupted during memory write */
2184 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, address);
2185 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
2186 xtensa_queue_exec_ins(xtensa, XT_INS_DHWB(xtensa, XT_REG_A3, 0));
2187 LOG_DEBUG("DHWB dcache line for address "TARGET_ADDR_FMT, address);
2188 if (!same_dc_line) {
2189 LOG_TARGET_DEBUG(target, "DHWB second dcache line for address "TARGET_ADDR_FMT, address + 4);
2190 xtensa_queue_exec_ins(xtensa, XT_INS_DHWB(xtensa, XT_REG_A3, 4));
2193 /* Execute invalidate instructions */
2194 ret = jtag_execute_queue();
2195 xtensa_core_status_check(target);
2198 /* TODO: Handle L2 cache if present */
2202 static int xtensa_sw_breakpoint_add(struct target *target,
2203 struct breakpoint *breakpoint,
2204 struct xtensa_sw_breakpoint *sw_bp)
2206 struct xtensa *xtensa = target_to_xtensa(target);
2207 int ret = target_read_buffer(target, breakpoint->address, XT_ISNS_SZ_MAX, sw_bp->insn);
2208 if (ret != ERROR_OK) {
2209 LOG_TARGET_ERROR(target, "Failed to read original instruction (%d)!", ret);
2213 sw_bp->insn_sz = MIN(XT_ISNS_SZ_MAX, breakpoint->length);
2214 sw_bp->oocd_bp = breakpoint;
2216 uint32_t break_insn = sw_bp->insn_sz == XT_ISNS_SZ_MAX ? XT_INS_BREAK(xtensa, 0, 0) : XT_INS_BREAKN(xtensa, 0);
2218 /* Underlying memory write will convert instruction endianness, don't do that here */
2219 ret = xtensa_update_instruction(target, breakpoint->address, sw_bp->insn_sz, (uint8_t *)&break_insn);
2220 if (ret != ERROR_OK) {
2221 LOG_TARGET_ERROR(target, "Failed to write breakpoint instruction (%d)!", ret);
2228 static int xtensa_sw_breakpoint_remove(struct target *target, struct xtensa_sw_breakpoint *sw_bp)
2230 int ret = xtensa_update_instruction(target, sw_bp->oocd_bp->address, sw_bp->insn_sz, sw_bp->insn);
2231 if (ret != ERROR_OK) {
2232 LOG_TARGET_ERROR(target, "Failed to write insn (%d)!", ret);
2235 sw_bp->oocd_bp = NULL;
2239 int xtensa_breakpoint_add(struct target *target, struct breakpoint *breakpoint)
2241 struct xtensa *xtensa = target_to_xtensa(target);
2244 if (breakpoint->type == BKPT_SOFT) {
2245 for (slot = 0; slot < XT_SW_BREAKPOINTS_MAX_NUM; slot++) {
2246 if (!xtensa->sw_brps[slot].oocd_bp ||
2247 xtensa->sw_brps[slot].oocd_bp == breakpoint)
2250 if (slot == XT_SW_BREAKPOINTS_MAX_NUM) {
2251 LOG_TARGET_WARNING(target, "No free slots to add SW breakpoint!");
2252 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2254 int ret = xtensa_sw_breakpoint_add(target, breakpoint, &xtensa->sw_brps[slot]);
2255 if (ret != ERROR_OK) {
2256 LOG_TARGET_ERROR(target, "Failed to add SW breakpoint!");
2259 LOG_TARGET_DEBUG(target, "placed SW breakpoint %u @ " TARGET_ADDR_FMT,
2261 breakpoint->address);
2265 for (slot = 0; slot < xtensa->core_config->debug.ibreaks_num; slot++) {
2266 if (!xtensa->hw_brps[slot] || xtensa->hw_brps[slot] == breakpoint)
2269 if (slot == xtensa->core_config->debug.ibreaks_num) {
2270 LOG_TARGET_ERROR(target, "No free slots to add HW breakpoint!");
2271 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2274 xtensa->hw_brps[slot] = breakpoint;
2275 /* We will actually write the breakpoints when we resume the target. */
2276 LOG_TARGET_DEBUG(target, "placed HW breakpoint %u @ " TARGET_ADDR_FMT,
2278 breakpoint->address);
2283 int xtensa_breakpoint_remove(struct target *target, struct breakpoint *breakpoint)
2285 struct xtensa *xtensa = target_to_xtensa(target);
2288 if (breakpoint->type == BKPT_SOFT) {
2289 for (slot = 0; slot < XT_SW_BREAKPOINTS_MAX_NUM; slot++) {
2290 if (xtensa->sw_brps[slot].oocd_bp && xtensa->sw_brps[slot].oocd_bp == breakpoint)
2293 if (slot == XT_SW_BREAKPOINTS_MAX_NUM) {
2294 LOG_TARGET_WARNING(target, "Max SW breakpoints slot reached, slot=%u!", slot);
2295 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2297 int ret = xtensa_sw_breakpoint_remove(target, &xtensa->sw_brps[slot]);
2298 if (ret != ERROR_OK) {
2299 LOG_TARGET_ERROR(target, "Failed to remove SW breakpoint (%d)!", ret);
2302 LOG_TARGET_DEBUG(target, "cleared SW breakpoint %u @ " TARGET_ADDR_FMT, slot, breakpoint->address);
2306 for (slot = 0; slot < xtensa->core_config->debug.ibreaks_num; slot++) {
2307 if (xtensa->hw_brps[slot] == breakpoint)
2310 if (slot == xtensa->core_config->debug.ibreaks_num) {
2311 LOG_TARGET_ERROR(target, "HW breakpoint not found!");
2312 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2314 xtensa->hw_brps[slot] = NULL;
2315 LOG_TARGET_DEBUG(target, "cleared HW breakpoint %u @ " TARGET_ADDR_FMT, slot, breakpoint->address);
2319 int xtensa_watchpoint_add(struct target *target, struct watchpoint *watchpoint)
2321 struct xtensa *xtensa = target_to_xtensa(target);
2323 xtensa_reg_val_t dbreakcval;
2325 if (target->state != TARGET_HALTED) {
2326 LOG_TARGET_WARNING(target, "target not halted");
2327 return ERROR_TARGET_NOT_HALTED;
2330 if (watchpoint->mask != ~(uint32_t)0) {
2331 LOG_TARGET_ERROR(target, "watchpoint value masks not supported");
2332 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2335 for (slot = 0; slot < xtensa->core_config->debug.dbreaks_num; slot++) {
2336 if (!xtensa->hw_wps[slot] || xtensa->hw_wps[slot] == watchpoint)
2339 if (slot == xtensa->core_config->debug.dbreaks_num) {
2340 LOG_TARGET_WARNING(target, "No free slots to add HW watchpoint!");
2341 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2344 /* Figure out value for dbreakc5..0
2345 * It's basically 0x3F with an incremental bit removed from the LSB for each extra length power of 2. */
2346 if (watchpoint->length < 1 || watchpoint->length > 64 ||
2347 !IS_PWR_OF_2(watchpoint->length) ||
2348 !IS_ALIGNED(watchpoint->address, watchpoint->length)) {
2351 "Watchpoint with length %d on address " TARGET_ADDR_FMT
2352 " not supported by hardware.",
2354 watchpoint->address);
2355 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2357 dbreakcval = ALIGN_DOWN(0x3F, watchpoint->length);
2359 if (watchpoint->rw == WPT_READ)
2360 dbreakcval |= BIT(30);
2361 if (watchpoint->rw == WPT_WRITE)
2362 dbreakcval |= BIT(31);
2363 if (watchpoint->rw == WPT_ACCESS)
2364 dbreakcval |= BIT(30) | BIT(31);
2366 /* Write DBREAKA[slot] and DBCREAKC[slot] */
2367 xtensa_reg_set(target, XT_REG_IDX_DBREAKA0 + slot, watchpoint->address);
2368 xtensa_reg_set(target, XT_REG_IDX_DBREAKC0 + slot, dbreakcval);
2369 xtensa->hw_wps[slot] = watchpoint;
2370 LOG_TARGET_DEBUG(target, "placed HW watchpoint @ " TARGET_ADDR_FMT,
2371 watchpoint->address);
2375 int xtensa_watchpoint_remove(struct target *target, struct watchpoint *watchpoint)
2377 struct xtensa *xtensa = target_to_xtensa(target);
2380 for (slot = 0; slot < xtensa->core_config->debug.dbreaks_num; slot++) {
2381 if (xtensa->hw_wps[slot] == watchpoint)
2384 if (slot == xtensa->core_config->debug.dbreaks_num) {
2385 LOG_TARGET_WARNING(target, "HW watchpoint " TARGET_ADDR_FMT " not found!", watchpoint->address);
2386 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2388 xtensa_reg_set(target, XT_REG_IDX_DBREAKC0 + slot, 0);
2389 xtensa->hw_wps[slot] = NULL;
2390 LOG_TARGET_DEBUG(target, "cleared HW watchpoint @ " TARGET_ADDR_FMT,
2391 watchpoint->address);
2395 static int xtensa_build_reg_cache(struct target *target)
2397 struct xtensa *xtensa = target_to_xtensa(target);
2398 struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
2399 unsigned int last_dbreg_num = 0;
2401 if (xtensa->core_regs_num + xtensa->num_optregs != xtensa->total_regs_num)
2402 LOG_TARGET_WARNING(target, "Register count MISMATCH: %d core regs, %d extended regs; %d expected",
2403 xtensa->core_regs_num, xtensa->num_optregs, xtensa->total_regs_num);
2405 struct reg_cache *reg_cache = calloc(1, sizeof(struct reg_cache));
2408 LOG_ERROR("Failed to alloc reg cache!");
2411 reg_cache->name = "Xtensa registers";
2412 reg_cache->next = NULL;
2414 unsigned int reg_list_size = XT_NUM_REGS + xtensa->num_optregs;
2415 struct reg *reg_list = calloc(reg_list_size, sizeof(struct reg));
2417 LOG_ERROR("Failed to alloc reg list!");
2420 xtensa->dbregs_num = 0;
2421 unsigned int didx = 0;
2422 for (unsigned int whichlist = 0; whichlist < 2; whichlist++) {
2423 struct xtensa_reg_desc *rlist = (whichlist == 0) ? xtensa_regs : xtensa->optregs;
2424 unsigned int listsize = (whichlist == 0) ? XT_NUM_REGS : xtensa->num_optregs;
2425 for (unsigned int i = 0; i < listsize; i++, didx++) {
2426 reg_list[didx].exist = rlist[i].exist;
2427 reg_list[didx].name = rlist[i].name;
2428 reg_list[didx].size = 32;
2429 reg_list[didx].value = calloc(1, 4 /*XT_REG_LEN*/); /* make Clang Static Analyzer happy */
2430 if (!reg_list[didx].value) {
2431 LOG_ERROR("Failed to alloc reg list value!");
2434 reg_list[didx].dirty = false;
2435 reg_list[didx].valid = false;
2436 reg_list[didx].type = &xtensa_reg_type;
2437 reg_list[didx].arch_info = xtensa;
2438 if (rlist[i].exist && (rlist[i].dbreg_num > last_dbreg_num))
2439 last_dbreg_num = rlist[i].dbreg_num;
2441 if (xtensa_extra_debug_log) {
2442 LOG_TARGET_DEBUG(target,
2443 "POPULATE %-16s list %d exist %d, idx %d, type %d, dbreg_num 0x%04x",
2444 reg_list[didx].name,
2446 reg_list[didx].exist,
2449 rlist[i].dbreg_num);
2454 xtensa->dbregs_num = last_dbreg_num + 1;
2455 reg_cache->reg_list = reg_list;
2456 reg_cache->num_regs = reg_list_size;
2458 LOG_TARGET_DEBUG(target, "xtensa->total_regs_num %d reg_list_size %d xtensa->dbregs_num %d",
2459 xtensa->total_regs_num, reg_list_size, xtensa->dbregs_num);
2461 /* Construct empty-register list for handling unknown register requests */
2462 xtensa->empty_regs = calloc(xtensa->dbregs_num, sizeof(struct reg));
2463 if (!xtensa->empty_regs) {
2464 LOG_TARGET_ERROR(target, "ERROR: Out of memory");
2467 for (unsigned int i = 0; i < xtensa->dbregs_num; i++) {
2468 xtensa->empty_regs[i].name = calloc(8, sizeof(char));
2469 if (!xtensa->empty_regs[i].name) {
2470 LOG_TARGET_ERROR(target, "ERROR: Out of memory");
2473 sprintf((char *)xtensa->empty_regs[i].name, "?0x%04x", i & 0x0000FFFF);
2474 xtensa->empty_regs[i].size = 32;
2475 xtensa->empty_regs[i].type = &xtensa_reg_type;
2476 xtensa->empty_regs[i].value = calloc(1, 4 /*XT_REG_LEN*/); /* make Clang Static Analyzer happy */
2477 if (!xtensa->empty_regs[i].value) {
2478 LOG_ERROR("Failed to alloc empty reg list value!");
2481 xtensa->empty_regs[i].arch_info = xtensa;
2484 /* Construct contiguous register list from contiguous descriptor list */
2485 if (xtensa->regmap_contiguous && xtensa->contiguous_regs_desc) {
2486 xtensa->contiguous_regs_list = calloc(xtensa->total_regs_num, sizeof(struct reg *));
2487 if (!xtensa->contiguous_regs_list) {
2488 LOG_TARGET_ERROR(target, "ERROR: Out of memory");
2491 for (unsigned int i = 0; i < xtensa->total_regs_num; i++) {
2493 for (j = 0; j < reg_cache->num_regs; j++) {
2494 if (!strcmp(reg_cache->reg_list[j].name, xtensa->contiguous_regs_desc[i]->name)) {
2495 xtensa->contiguous_regs_list[i] = &(reg_cache->reg_list[j]);
2496 LOG_TARGET_DEBUG(target,
2497 "POPULATE contiguous regs list: %-16s, dbreg_num 0x%04x",
2498 xtensa->contiguous_regs_list[i]->name,
2499 xtensa->contiguous_regs_desc[i]->dbreg_num);
2503 if (j == reg_cache->num_regs)
2504 LOG_TARGET_WARNING(target, "contiguous register %s not found",
2505 xtensa->contiguous_regs_desc[i]->name);
2509 xtensa->algo_context_backup = calloc(reg_cache->num_regs, sizeof(void *));
2510 if (!xtensa->algo_context_backup) {
2511 LOG_ERROR("Failed to alloc mem for algorithm context backup!");
2514 for (unsigned int i = 0; i < reg_cache->num_regs; i++) {
2515 struct reg *reg = ®_cache->reg_list[i];
2516 xtensa->algo_context_backup[i] = calloc(1, reg->size / 8);
2517 if (!xtensa->algo_context_backup[i]) {
2518 LOG_ERROR("Failed to alloc mem for algorithm context!");
2522 xtensa->core_cache = reg_cache;
2524 *cache_p = reg_cache;
2529 for (unsigned int i = 0; i < reg_list_size; i++)
2530 free(reg_list[i].value);
2533 if (xtensa->empty_regs) {
2534 for (unsigned int i = 0; i < xtensa->dbregs_num; i++) {
2535 free((void *)xtensa->empty_regs[i].name);
2536 free(xtensa->empty_regs[i].value);
2538 free(xtensa->empty_regs);
2540 if (xtensa->algo_context_backup) {
2541 for (unsigned int i = 0; i < reg_cache->num_regs; i++)
2542 free(xtensa->algo_context_backup[i]);
2543 free(xtensa->algo_context_backup);
2550 static int32_t xtensa_gdbqc_parse_exec_tie_ops(struct target *target, char *opstr)
2552 struct xtensa *xtensa = target_to_xtensa(target);
2553 int32_t status = ERROR_COMMAND_ARGUMENT_INVALID;
2554 /* Process op[] list */
2555 while (opstr && (*opstr == ':')) {
2557 unsigned int oplen = strtoul(opstr + 1, &opstr, 16);
2559 LOG_TARGET_ERROR(target, "TIE access instruction too long (%d)\n", oplen);
2563 while ((i < oplen) && opstr && (*opstr == ':'))
2564 ops[i++] = strtoul(opstr + 1, &opstr, 16);
2566 LOG_TARGET_ERROR(target, "TIE access instruction malformed (%d)\n", i);
2571 sprintf(insn_buf, "Exec %d-byte TIE sequence: ", oplen);
2572 for (i = 0; i < oplen; i++)
2573 sprintf(insn_buf + strlen(insn_buf), "%02x:", ops[i]);
2574 LOG_TARGET_DEBUG(target, "%s", insn_buf);
2575 xtensa_queue_exec_ins_wide(xtensa, ops, oplen); /* Handles endian-swap */
2581 static int xtensa_gdbqc_qxtreg(struct target *target, const char *packet, char **response_p)
2583 struct xtensa *xtensa = target_to_xtensa(target);
2584 bool iswrite = (packet[0] == 'Q');
2585 enum xtensa_qerr_e error;
2587 /* Read/write TIE register. Requires spill location.
2588 * qxtreg<num>:<len>:<oplen>:<op[0]>:<...>[:<oplen>:<op[0]>:<...>]
2589 * Qxtreg<num>:<len>:<oplen>:<op[0]>:<...>[:<oplen>:<op[0]>:<...>]=<value>
2591 if (!(xtensa->spill_buf)) {
2592 LOG_ERROR("Spill location not specified. Try 'target remote <host>:3333 &spill_location0'");
2593 error = XT_QERR_FAIL;
2594 goto xtensa_gdbqc_qxtreg_fail;
2598 uint32_t regnum = strtoul(packet + 6, &delim, 16);
2599 if (*delim != ':') {
2600 LOG_ERROR("Malformed qxtreg packet");
2601 error = XT_QERR_INVAL;
2602 goto xtensa_gdbqc_qxtreg_fail;
2604 uint32_t reglen = strtoul(delim + 1, &delim, 16);
2605 if (*delim != ':') {
2606 LOG_ERROR("Malformed qxtreg packet");
2607 error = XT_QERR_INVAL;
2608 goto xtensa_gdbqc_qxtreg_fail;
2610 uint8_t regbuf[XT_QUERYPKT_RESP_MAX];
2611 memset(regbuf, 0, XT_QUERYPKT_RESP_MAX);
2612 LOG_DEBUG("TIE reg 0x%08" PRIx32 " %s (%d bytes)", regnum, iswrite ? "write" : "read", reglen);
2613 if (reglen * 2 + 1 > XT_QUERYPKT_RESP_MAX) {
2614 LOG_ERROR("TIE register too large");
2615 error = XT_QERR_MEM;
2616 goto xtensa_gdbqc_qxtreg_fail;
2619 /* (1) Save spill memory, (1.5) [if write then store value to spill location],
2620 * (2) read old a4, (3) write spill address to a4.
2621 * NOTE: ensure a4 is restored properly by all error handling logic
2623 unsigned int memop_size = (xtensa->spill_loc & 3) ? 1 : 4;
2624 int status = xtensa_read_memory(target, xtensa->spill_loc, memop_size,
2625 xtensa->spill_bytes / memop_size, xtensa->spill_buf);
2626 if (status != ERROR_OK) {
2627 LOG_ERROR("Spill memory save");
2628 error = XT_QERR_MEM;
2629 goto xtensa_gdbqc_qxtreg_fail;
2632 /* Extract value and store in spill memory */
2634 char *valbuf = strchr(delim, '=');
2635 if (!(valbuf && (*valbuf == '='))) {
2636 LOG_ERROR("Malformed Qxtreg packet");
2637 error = XT_QERR_INVAL;
2638 goto xtensa_gdbqc_qxtreg_fail;
2641 while (*valbuf && *(valbuf + 1)) {
2642 char bytestr[3] = { 0, 0, 0 };
2643 strncpy(bytestr, valbuf, 2);
2644 regbuf[b++] = strtoul(bytestr, NULL, 16);
2648 LOG_ERROR("Malformed Qxtreg packet");
2649 error = XT_QERR_INVAL;
2650 goto xtensa_gdbqc_qxtreg_fail;
2652 status = xtensa_write_memory(target, xtensa->spill_loc, memop_size,
2653 reglen / memop_size, regbuf);
2654 if (status != ERROR_OK) {
2655 LOG_ERROR("TIE value store");
2656 error = XT_QERR_MEM;
2657 goto xtensa_gdbqc_qxtreg_fail;
2660 xtensa_reg_val_t orig_a4 = xtensa_reg_get(target, XT_REG_IDX_A4);
2661 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, xtensa->spill_loc);
2662 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A4));
2664 int32_t tieop_status = xtensa_gdbqc_parse_exec_tie_ops(target, delim);
2666 /* Restore a4 but not yet spill memory. Execute it all... */
2667 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, orig_a4);
2668 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A4));
2669 status = jtag_execute_queue();
2670 if (status != ERROR_OK) {
2671 LOG_TARGET_ERROR(target, "TIE queue execute: %d\n", status);
2672 tieop_status = status;
2674 status = xtensa_core_status_check(target);
2675 if (status != ERROR_OK) {
2676 LOG_TARGET_ERROR(target, "TIE instr execute: %d\n", status);
2677 tieop_status = status;
2680 if (tieop_status == ERROR_OK) {
2682 /* TIE write succeeded; send OK */
2683 strcpy(*response_p, "OK");
2685 /* TIE read succeeded; copy result from spill memory */
2686 status = xtensa_read_memory(target, xtensa->spill_loc, memop_size, reglen, regbuf);
2687 if (status != ERROR_OK) {
2688 LOG_TARGET_ERROR(target, "TIE result read");
2689 tieop_status = status;
2692 for (i = 0; i < reglen; i++)
2693 sprintf(*response_p + 2 * i, "%02x", regbuf[i]);
2694 *(*response_p + 2 * i) = '\0';
2695 LOG_TARGET_DEBUG(target, "TIE response: %s", *response_p);
2699 /* Restore spill memory first, then report any previous errors */
2700 status = xtensa_write_memory(target, xtensa->spill_loc, memop_size,
2701 xtensa->spill_bytes / memop_size, xtensa->spill_buf);
2702 if (status != ERROR_OK) {
2703 LOG_ERROR("Spill memory restore");
2704 error = XT_QERR_MEM;
2705 goto xtensa_gdbqc_qxtreg_fail;
2707 if (tieop_status != ERROR_OK) {
2708 LOG_ERROR("TIE execution");
2709 error = XT_QERR_FAIL;
2710 goto xtensa_gdbqc_qxtreg_fail;
2714 xtensa_gdbqc_qxtreg_fail:
2715 strcpy(*response_p, xt_qerr[error].chrval);
2716 return xt_qerr[error].intval;
2719 int xtensa_gdb_query_custom(struct target *target, const char *packet, char **response_p)
2721 struct xtensa *xtensa = target_to_xtensa(target);
2722 enum xtensa_qerr_e error;
2723 if (!packet || !response_p) {
2724 LOG_TARGET_ERROR(target, "invalid parameter: packet %p response_p %p", packet, response_p);
2728 *response_p = xtensa->qpkt_resp;
2729 if (strncmp(packet, "qxtn", 4) == 0) {
2730 strcpy(*response_p, "OpenOCD");
2732 } else if (strncasecmp(packet, "qxtgdbversion=", 14) == 0) {
2734 } else if ((strncmp(packet, "Qxtsis=", 7) == 0) || (strncmp(packet, "Qxtsds=", 7) == 0)) {
2735 /* Confirm host cache params match core .cfg file */
2736 struct xtensa_cache_config *cachep = (packet[4] == 'i') ?
2737 &xtensa->core_config->icache : &xtensa->core_config->dcache;
2738 unsigned int line_size = 0, size = 0, way_count = 0;
2739 sscanf(&packet[7], "%x,%x,%x", &line_size, &size, &way_count);
2740 if ((cachep->line_size != line_size) ||
2741 (cachep->size != size) ||
2742 (cachep->way_count != way_count)) {
2743 LOG_TARGET_WARNING(target, "%cCache mismatch; check xtensa-core-XXX.cfg file",
2744 cachep == &xtensa->core_config->icache ? 'I' : 'D');
2746 strcpy(*response_p, "OK");
2748 } else if ((strncmp(packet, "Qxtiram=", 8) == 0) || (strncmp(packet, "Qxtirom=", 8) == 0)) {
2749 /* Confirm host IRAM/IROM params match core .cfg file */
2750 struct xtensa_local_mem_config *memp = (packet[5] == 'a') ?
2751 &xtensa->core_config->iram : &xtensa->core_config->irom;
2752 unsigned int base = 0, size = 0, i;
2753 char *pkt = (char *)&packet[7];
2756 size = strtoul(pkt, &pkt, 16);
2758 base = strtoul(pkt, &pkt, 16);
2759 LOG_TARGET_DEBUG(target, "memcheck: %dB @ 0x%08x", size, base);
2760 for (i = 0; i < memp->count; i++) {
2761 if ((memp->regions[i].base == base) && (memp->regions[i].size == size))
2764 if (i == memp->count) {
2765 LOG_TARGET_WARNING(target, "%s mismatch; check xtensa-core-XXX.cfg file",
2766 memp == &xtensa->core_config->iram ? "IRAM" : "IROM");
2769 for (i = 0; i < 11; i++) {
2771 strtoul(pkt, &pkt, 16);
2773 } while (pkt && (pkt[0] == ','));
2774 strcpy(*response_p, "OK");
2776 } else if (strncmp(packet, "Qxtexcmlvl=", 11) == 0) {
2777 /* Confirm host EXCM_LEVEL matches core .cfg file */
2778 unsigned int excm_level = strtoul(&packet[11], NULL, 0);
2779 if (!xtensa->core_config->high_irq.enabled ||
2780 (excm_level != xtensa->core_config->high_irq.excm_level))
2781 LOG_TARGET_WARNING(target, "EXCM_LEVEL mismatch; check xtensa-core-XXX.cfg file");
2782 strcpy(*response_p, "OK");
2784 } else if ((strncmp(packet, "Qxtl2cs=", 8) == 0) ||
2785 (strncmp(packet, "Qxtl2ca=", 8) == 0) ||
2786 (strncmp(packet, "Qxtdensity=", 11) == 0)) {
2787 strcpy(*response_p, "OK");
2789 } else if (strncmp(packet, "Qxtspill=", 9) == 0) {
2791 uint32_t spill_loc = strtoul(packet + 9, &delim, 16);
2792 if (*delim != ':') {
2793 LOG_ERROR("Malformed Qxtspill packet");
2794 error = XT_QERR_INVAL;
2795 goto xtensa_gdb_query_custom_fail;
2797 xtensa->spill_loc = spill_loc;
2798 xtensa->spill_bytes = strtoul(delim + 1, NULL, 16);
2799 if (xtensa->spill_buf)
2800 free(xtensa->spill_buf);
2801 xtensa->spill_buf = calloc(1, xtensa->spill_bytes);
2802 if (!xtensa->spill_buf) {
2803 LOG_ERROR("Spill buf alloc");
2804 error = XT_QERR_MEM;
2805 goto xtensa_gdb_query_custom_fail;
2807 LOG_TARGET_DEBUG(target, "Set spill 0x%08" PRIx32 " (%d)", xtensa->spill_loc, xtensa->spill_bytes);
2808 strcpy(*response_p, "OK");
2810 } else if (strncasecmp(packet, "qxtreg", 6) == 0) {
2811 return xtensa_gdbqc_qxtreg(target, packet, response_p);
2812 } else if ((strncmp(packet, "qTStatus", 8) == 0) ||
2813 (strncmp(packet, "qxtftie", 7) == 0) ||
2814 (strncmp(packet, "qxtstie", 7) == 0)) {
2815 /* Return empty string to indicate trace, TIE wire debug are unsupported */
2816 strcpy(*response_p, "");
2820 /* Warn for all other queries, but do not return errors */
2821 LOG_TARGET_WARNING(target, "Unknown target-specific query packet: %s", packet);
2822 strcpy(*response_p, "");
2825 xtensa_gdb_query_custom_fail:
2826 strcpy(*response_p, xt_qerr[error].chrval);
2827 return xt_qerr[error].intval;
2830 int xtensa_init_arch_info(struct target *target, struct xtensa *xtensa,
2831 const struct xtensa_debug_module_config *dm_cfg)
2833 target->arch_info = xtensa;
2834 xtensa->common_magic = XTENSA_COMMON_MAGIC;
2835 xtensa->target = target;
2836 xtensa->stepping_isr_mode = XT_STEPPING_ISR_ON;
2838 xtensa->core_config = calloc(1, sizeof(struct xtensa_config));
2839 if (!xtensa->core_config) {
2840 LOG_ERROR("Xtensa configuration alloc failed\n");
2844 /* Default cache settings are disabled with 1 way */
2845 xtensa->core_config->icache.way_count = 1;
2846 xtensa->core_config->dcache.way_count = 1;
2848 /* chrval: AR3/AR4 register names will change with window mapping.
2849 * intval: tracks whether scratch register was set through gdb P packet.
2851 for (enum xtensa_ar_scratch_set_e s = 0; s < XT_AR_SCRATCH_NUM; s++) {
2852 xtensa->scratch_ars[s].chrval = calloc(8, sizeof(char));
2853 if (!xtensa->scratch_ars[s].chrval) {
2854 for (enum xtensa_ar_scratch_set_e f = 0; f < s; f++)
2855 free(xtensa->scratch_ars[f].chrval);
2856 free(xtensa->core_config);
2857 LOG_ERROR("Xtensa scratch AR alloc failed\n");
2860 xtensa->scratch_ars[s].intval = false;
2861 sprintf(xtensa->scratch_ars[s].chrval, "%s%d",
2862 ((s == XT_AR_SCRATCH_A3) || (s == XT_AR_SCRATCH_A4)) ? "a" : "ar",
2863 ((s == XT_AR_SCRATCH_A3) || (s == XT_AR_SCRATCH_AR3)) ? 3 : 4);
2866 return xtensa_dm_init(&xtensa->dbg_mod, dm_cfg);
2869 void xtensa_set_permissive_mode(struct target *target, bool state)
2871 target_to_xtensa(target)->permissive_mode = state;
2874 int xtensa_target_init(struct command_context *cmd_ctx, struct target *target)
2876 struct xtensa *xtensa = target_to_xtensa(target);
2878 xtensa->come_online_probes_num = 3;
2879 xtensa->hw_brps = calloc(XT_HW_IBREAK_MAX_NUM, sizeof(struct breakpoint *));
2880 if (!xtensa->hw_brps) {
2881 LOG_ERROR("Failed to alloc memory for HW breakpoints!");
2884 xtensa->hw_wps = calloc(XT_HW_DBREAK_MAX_NUM, sizeof(struct watchpoint *));
2885 if (!xtensa->hw_wps) {
2886 free(xtensa->hw_brps);
2887 LOG_ERROR("Failed to alloc memory for HW watchpoints!");
2890 xtensa->sw_brps = calloc(XT_SW_BREAKPOINTS_MAX_NUM, sizeof(struct xtensa_sw_breakpoint));
2891 if (!xtensa->sw_brps) {
2892 free(xtensa->hw_brps);
2893 free(xtensa->hw_wps);
2894 LOG_ERROR("Failed to alloc memory for SW breakpoints!");
2898 xtensa->spill_loc = 0xffffffff;
2899 xtensa->spill_bytes = 0;
2900 xtensa->spill_buf = NULL;
2901 xtensa->probe_lsddr32p = -1; /* Probe for fast load/store operations */
2903 return xtensa_build_reg_cache(target);
2906 static void xtensa_free_reg_cache(struct target *target)
2908 struct xtensa *xtensa = target_to_xtensa(target);
2909 struct reg_cache *cache = xtensa->core_cache;
2912 register_unlink_cache(&target->reg_cache, cache);
2913 for (unsigned int i = 0; i < cache->num_regs; i++) {
2914 free(xtensa->algo_context_backup[i]);
2915 free(cache->reg_list[i].value);
2917 free(xtensa->algo_context_backup);
2918 free(cache->reg_list);
2921 xtensa->core_cache = NULL;
2922 xtensa->algo_context_backup = NULL;
2924 if (xtensa->empty_regs) {
2925 for (unsigned int i = 0; i < xtensa->dbregs_num; i++) {
2926 free((void *)xtensa->empty_regs[i].name);
2927 free(xtensa->empty_regs[i].value);
2929 free(xtensa->empty_regs);
2931 xtensa->empty_regs = NULL;
2932 if (xtensa->optregs) {
2933 for (unsigned int i = 0; i < xtensa->num_optregs; i++)
2934 free((void *)xtensa->optregs[i].name);
2935 free(xtensa->optregs);
2937 xtensa->optregs = NULL;
2940 void xtensa_target_deinit(struct target *target)
2942 struct xtensa *xtensa = target_to_xtensa(target);
2946 if (target_was_examined(target)) {
2947 int ret = xtensa_queue_dbg_reg_write(xtensa, NARADR_DCRCLR, OCDDCR_ENABLEOCD);
2948 if (ret != ERROR_OK) {
2949 LOG_ERROR("Failed to queue OCDDCR_ENABLEOCD clear operation!");
2952 xtensa_dm_queue_tdi_idle(&xtensa->dbg_mod);
2953 ret = jtag_execute_queue();
2954 if (ret != ERROR_OK) {
2955 LOG_ERROR("Failed to clear OCDDCR_ENABLEOCD!");
2959 xtensa_free_reg_cache(target);
2960 free(xtensa->hw_brps);
2961 free(xtensa->hw_wps);
2962 free(xtensa->sw_brps);
2963 if (xtensa->spill_buf) {
2964 free(xtensa->spill_buf);
2965 xtensa->spill_buf = NULL;
2967 for (enum xtensa_ar_scratch_set_e s = 0; s < XT_AR_SCRATCH_NUM; s++)
2968 free(xtensa->scratch_ars[s].chrval);
2969 free(xtensa->core_config);
2972 const char *xtensa_get_gdb_arch(struct target *target)
2977 /* exe <ascii-encoded hexadecimal instruction bytes> */
2978 COMMAND_HELPER(xtensa_cmd_exe_do, struct target *target)
2980 struct xtensa *xtensa = target_to_xtensa(target);
2983 return ERROR_COMMAND_SYNTAX_ERROR;
2985 /* Process ascii-encoded hex byte string */
2986 const char *parm = CMD_ARGV[0];
2987 unsigned int parm_len = strlen(parm);
2988 if ((parm_len >= 64) || (parm_len & 1)) {
2989 LOG_ERROR("Invalid parameter length (%d): must be even, < 64 characters", parm_len);
2995 unsigned int oplen = parm_len / 2;
2996 char encoded_byte[3] = { 0, 0, 0 };
2997 for (unsigned int i = 0; i < oplen; i++) {
2998 encoded_byte[0] = *parm++;
2999 encoded_byte[1] = *parm++;
3000 ops[i] = strtoul(encoded_byte, NULL, 16);
3003 /* GDB must handle state save/restore.
3004 * Flush reg cache in case spill location is in an AR
3005 * Update CPENABLE only for this execution; later restore cached copy
3006 * Keep a copy of exccause in case executed code triggers an exception
3008 int status = xtensa_write_dirty_registers(target);
3009 if (status != ERROR_OK) {
3010 LOG_ERROR("%s: Failed to write back register cache.", target_name(target));
3013 xtensa_reg_val_t exccause = xtensa_reg_get(target, XT_REG_IDX_EXCCAUSE);
3014 xtensa_reg_val_t cpenable = xtensa_reg_get(target, XT_REG_IDX_CPENABLE);
3015 xtensa_reg_val_t a3 = xtensa_reg_get(target, XT_REG_IDX_A3);
3016 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, 0xffffffff);
3017 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
3018 xtensa_queue_exec_ins(xtensa, XT_INS_WSR(xtensa,
3019 xtensa_regs[XT_REG_IDX_CPENABLE].reg_num, XT_REG_A3));
3020 xtensa_queue_dbg_reg_write(xtensa, NARADR_DDR, a3);
3021 xtensa_queue_exec_ins(xtensa, XT_INS_RSR(xtensa, XT_SR_DDR, XT_REG_A3));
3023 /* Queue instruction list and execute everything */
3024 LOG_TARGET_DEBUG(target, "execute stub: %s", CMD_ARGV[0]);
3025 xtensa_queue_exec_ins_wide(xtensa, ops, oplen); /* Handles endian-swap */
3026 status = jtag_execute_queue();
3027 if (status != ERROR_OK)
3028 LOG_TARGET_ERROR(target, "TIE queue execute: %d\n", status);
3029 status = xtensa_core_status_check(target);
3030 if (status != ERROR_OK)
3031 LOG_TARGET_ERROR(target, "TIE instr execute: %d\n", status);
3033 /* Reread register cache and restore saved regs after instruction execution */
3034 if (xtensa_fetch_all_regs(target) != ERROR_OK)
3035 LOG_TARGET_ERROR(target, "%s: Failed to fetch register cache (post-exec).", target_name(target));
3036 xtensa_reg_set(target, XT_REG_IDX_EXCCAUSE, exccause);
3037 xtensa_reg_set(target, XT_REG_IDX_CPENABLE, cpenable);
3041 COMMAND_HANDLER(xtensa_cmd_exe)
3043 return CALL_COMMAND_HANDLER(xtensa_cmd_exe_do, get_current_target(CMD_CTX));
3047 COMMAND_HELPER(xtensa_cmd_xtdef_do, struct xtensa *xtensa)
3050 return ERROR_COMMAND_SYNTAX_ERROR;
3052 const char *core_name = CMD_ARGV[0];
3053 if (strcasecmp(core_name, "LX") == 0) {
3054 xtensa->core_config->core_type = XT_LX;
3056 LOG_ERROR("xtdef [LX]\n");
3057 return ERROR_COMMAND_SYNTAX_ERROR;
3062 COMMAND_HANDLER(xtensa_cmd_xtdef)
3064 return CALL_COMMAND_HANDLER(xtensa_cmd_xtdef_do,
3065 target_to_xtensa(get_current_target(CMD_CTX)));
3068 static inline bool xtensa_cmd_xtopt_legal_val(char *opt, int val, int min, int max)
3070 if ((val < min) || (val > max)) {
3071 LOG_ERROR("xtopt %s (%d) out of range [%d..%d]\n", opt, val, min, max);
3077 /* xtopt <name> <value> */
3078 COMMAND_HELPER(xtensa_cmd_xtopt_do, struct xtensa *xtensa)
3081 return ERROR_COMMAND_SYNTAX_ERROR;
3083 const char *opt_name = CMD_ARGV[0];
3084 int opt_val = strtol(CMD_ARGV[1], NULL, 0);
3085 if (strcasecmp(opt_name, "arnum") == 0) {
3086 if (!xtensa_cmd_xtopt_legal_val("arnum", opt_val, 0, 64))
3087 return ERROR_COMMAND_ARGUMENT_INVALID;
3088 xtensa->core_config->aregs_num = opt_val;
3089 } else if (strcasecmp(opt_name, "windowed") == 0) {
3090 if (!xtensa_cmd_xtopt_legal_val("windowed", opt_val, 0, 1))
3091 return ERROR_COMMAND_ARGUMENT_INVALID;
3092 xtensa->core_config->windowed = opt_val;
3093 } else if (strcasecmp(opt_name, "cpenable") == 0) {
3094 if (!xtensa_cmd_xtopt_legal_val("cpenable", opt_val, 0, 1))
3095 return ERROR_COMMAND_ARGUMENT_INVALID;
3096 xtensa->core_config->coproc = opt_val;
3097 } else if (strcasecmp(opt_name, "exceptions") == 0) {
3098 if (!xtensa_cmd_xtopt_legal_val("exceptions", opt_val, 0, 1))
3099 return ERROR_COMMAND_ARGUMENT_INVALID;
3100 xtensa->core_config->exceptions = opt_val;
3101 } else if (strcasecmp(opt_name, "intnum") == 0) {
3102 if (!xtensa_cmd_xtopt_legal_val("intnum", opt_val, 0, 32))
3103 return ERROR_COMMAND_ARGUMENT_INVALID;
3104 xtensa->core_config->irq.enabled = (opt_val > 0);
3105 xtensa->core_config->irq.irq_num = opt_val;
3106 } else if (strcasecmp(opt_name, "hipriints") == 0) {
3107 if (!xtensa_cmd_xtopt_legal_val("hipriints", opt_val, 0, 1))
3108 return ERROR_COMMAND_ARGUMENT_INVALID;
3109 xtensa->core_config->high_irq.enabled = opt_val;
3110 } else if (strcasecmp(opt_name, "excmlevel") == 0) {
3111 if (!xtensa_cmd_xtopt_legal_val("excmlevel", opt_val, 1, 6))
3112 return ERROR_COMMAND_ARGUMENT_INVALID;
3113 if (!xtensa->core_config->high_irq.enabled) {
3114 LOG_ERROR("xtopt excmlevel requires hipriints\n");
3115 return ERROR_COMMAND_ARGUMENT_INVALID;
3117 xtensa->core_config->high_irq.excm_level = opt_val;
3118 } else if (strcasecmp(opt_name, "intlevels") == 0) {
3119 if (xtensa->core_config->core_type == XT_LX) {
3120 if (!xtensa_cmd_xtopt_legal_val("intlevels", opt_val, 2, 6))
3121 return ERROR_COMMAND_ARGUMENT_INVALID;
3123 if (!xtensa_cmd_xtopt_legal_val("intlevels", opt_val, 1, 255))
3124 return ERROR_COMMAND_ARGUMENT_INVALID;
3126 if (!xtensa->core_config->high_irq.enabled) {
3127 LOG_ERROR("xtopt intlevels requires hipriints\n");
3128 return ERROR_COMMAND_ARGUMENT_INVALID;
3130 xtensa->core_config->high_irq.level_num = opt_val;
3131 } else if (strcasecmp(opt_name, "debuglevel") == 0) {
3132 if (xtensa->core_config->core_type == XT_LX) {
3133 if (!xtensa_cmd_xtopt_legal_val("debuglevel", opt_val, 2, 6))
3134 return ERROR_COMMAND_ARGUMENT_INVALID;
3136 if (!xtensa_cmd_xtopt_legal_val("debuglevel", opt_val, 0, 0))
3137 return ERROR_COMMAND_ARGUMENT_INVALID;
3139 xtensa->core_config->debug.enabled = 1;
3140 xtensa->core_config->debug.irq_level = opt_val;
3141 } else if (strcasecmp(opt_name, "ibreaknum") == 0) {
3142 if (!xtensa_cmd_xtopt_legal_val("ibreaknum", opt_val, 0, 2))
3143 return ERROR_COMMAND_ARGUMENT_INVALID;
3144 xtensa->core_config->debug.ibreaks_num = opt_val;
3145 } else if (strcasecmp(opt_name, "dbreaknum") == 0) {
3146 if (!xtensa_cmd_xtopt_legal_val("dbreaknum", opt_val, 0, 2))
3147 return ERROR_COMMAND_ARGUMENT_INVALID;
3148 xtensa->core_config->debug.dbreaks_num = opt_val;
3149 } else if (strcasecmp(opt_name, "tracemem") == 0) {
3150 if (!xtensa_cmd_xtopt_legal_val("tracemem", opt_val, 0, 256 * 1024))
3151 return ERROR_COMMAND_ARGUMENT_INVALID;
3152 xtensa->core_config->trace.mem_sz = opt_val;
3153 xtensa->core_config->trace.enabled = (opt_val > 0);
3154 } else if (strcasecmp(opt_name, "tracememrev") == 0) {
3155 if (!xtensa_cmd_xtopt_legal_val("tracememrev", opt_val, 0, 1))
3156 return ERROR_COMMAND_ARGUMENT_INVALID;
3157 xtensa->core_config->trace.reversed_mem_access = opt_val;
3158 } else if (strcasecmp(opt_name, "perfcount") == 0) {
3159 if (!xtensa_cmd_xtopt_legal_val("perfcount", opt_val, 0, 8))
3160 return ERROR_COMMAND_ARGUMENT_INVALID;
3161 xtensa->core_config->debug.perfcount_num = opt_val;
3163 LOG_WARNING("Unknown xtensa command ignored: \"xtopt %s %s\"", CMD_ARGV[0], CMD_ARGV[1]);
3170 COMMAND_HANDLER(xtensa_cmd_xtopt)
3172 return CALL_COMMAND_HANDLER(xtensa_cmd_xtopt_do,
3173 target_to_xtensa(get_current_target(CMD_CTX)));
3176 /* xtmem <type> [parameters] */
3177 COMMAND_HELPER(xtensa_cmd_xtmem_do, struct xtensa *xtensa)
3179 struct xtensa_cache_config *cachep = NULL;
3180 struct xtensa_local_mem_config *memp = NULL;
3182 bool is_dcache = false;
3184 if (CMD_ARGC == 0) {
3185 LOG_ERROR("xtmem <type> [parameters]\n");
3186 return ERROR_COMMAND_SYNTAX_ERROR;
3189 const char *mem_name = CMD_ARGV[0];
3190 if (strcasecmp(mem_name, "icache") == 0) {
3191 cachep = &xtensa->core_config->icache;
3192 } else if (strcasecmp(mem_name, "dcache") == 0) {
3193 cachep = &xtensa->core_config->dcache;
3195 } else if (strcasecmp(mem_name, "l2cache") == 0) {
3196 /* TODO: support L2 cache */
3197 } else if (strcasecmp(mem_name, "l2addr") == 0) {
3198 /* TODO: support L2 cache */
3199 } else if (strcasecmp(mem_name, "iram") == 0) {
3200 memp = &xtensa->core_config->iram;
3201 mem_access = XT_MEM_ACCESS_READ | XT_MEM_ACCESS_WRITE;
3202 } else if (strcasecmp(mem_name, "dram") == 0) {
3203 memp = &xtensa->core_config->dram;
3204 mem_access = XT_MEM_ACCESS_READ | XT_MEM_ACCESS_WRITE;
3205 } else if (strcasecmp(mem_name, "sram") == 0) {
3206 memp = &xtensa->core_config->sram;
3207 mem_access = XT_MEM_ACCESS_READ | XT_MEM_ACCESS_WRITE;
3208 } else if (strcasecmp(mem_name, "irom") == 0) {
3209 memp = &xtensa->core_config->irom;
3210 mem_access = XT_MEM_ACCESS_READ;
3211 } else if (strcasecmp(mem_name, "drom") == 0) {
3212 memp = &xtensa->core_config->drom;
3213 mem_access = XT_MEM_ACCESS_READ;
3214 } else if (strcasecmp(mem_name, "srom") == 0) {
3215 memp = &xtensa->core_config->srom;
3216 mem_access = XT_MEM_ACCESS_READ;
3218 LOG_ERROR("xtmem types: <icache|dcache|l2cache|l2addr|iram|irom|dram|drom|sram|srom>\n");
3219 return ERROR_COMMAND_ARGUMENT_INVALID;
3223 if ((CMD_ARGC != 4) && (CMD_ARGC != 5)) {
3224 LOG_ERROR("xtmem <cachetype> <linebytes> <cachebytes> <ways> [writeback]\n");
3225 return ERROR_COMMAND_SYNTAX_ERROR;
3227 cachep->line_size = strtoul(CMD_ARGV[1], NULL, 0);
3228 cachep->size = strtoul(CMD_ARGV[2], NULL, 0);
3229 cachep->way_count = strtoul(CMD_ARGV[3], NULL, 0);
3230 cachep->writeback = ((CMD_ARGC == 5) && is_dcache) ?
3231 strtoul(CMD_ARGV[4], NULL, 0) : 0;
3233 if (CMD_ARGC != 3) {
3234 LOG_ERROR("xtmem <memtype> <baseaddr> <bytes>\n");
3235 return ERROR_COMMAND_SYNTAX_ERROR;
3237 struct xtensa_local_mem_region_config *memcfgp = &memp->regions[memp->count];
3238 memcfgp->base = strtoul(CMD_ARGV[1], NULL, 0);
3239 memcfgp->size = strtoul(CMD_ARGV[2], NULL, 0);
3240 memcfgp->access = mem_access;
3247 COMMAND_HANDLER(xtensa_cmd_xtmem)
3249 return CALL_COMMAND_HANDLER(xtensa_cmd_xtmem_do,
3250 target_to_xtensa(get_current_target(CMD_CTX)));
3253 /* xtmpu <num FG seg> <min seg size> <lockable> <executeonly> */
3254 COMMAND_HELPER(xtensa_cmd_xtmpu_do, struct xtensa *xtensa)
3256 if (CMD_ARGC != 4) {
3257 LOG_ERROR("xtmpu <num FG seg> <min seg size> <lockable> <executeonly>\n");
3258 return ERROR_COMMAND_SYNTAX_ERROR;
3261 unsigned int nfgseg = strtoul(CMD_ARGV[0], NULL, 0);
3262 unsigned int minsegsize = strtoul(CMD_ARGV[1], NULL, 0);
3263 unsigned int lockable = strtoul(CMD_ARGV[2], NULL, 0);
3264 unsigned int execonly = strtoul(CMD_ARGV[3], NULL, 0);
3266 if ((nfgseg > 32)) {
3267 LOG_ERROR("<nfgseg> must be within [0..32]\n");
3268 return ERROR_COMMAND_ARGUMENT_INVALID;
3269 } else if (minsegsize & (minsegsize - 1)) {
3270 LOG_ERROR("<minsegsize> must be a power of 2 >= 32\n");
3271 return ERROR_COMMAND_ARGUMENT_INVALID;
3272 } else if (lockable > 1) {
3273 LOG_ERROR("<lockable> must be 0 or 1\n");
3274 return ERROR_COMMAND_ARGUMENT_INVALID;
3275 } else if (execonly > 1) {
3276 LOG_ERROR("<execonly> must be 0 or 1\n");
3277 return ERROR_COMMAND_ARGUMENT_INVALID;
3280 xtensa->core_config->mpu.enabled = true;
3281 xtensa->core_config->mpu.nfgseg = nfgseg;
3282 xtensa->core_config->mpu.minsegsize = minsegsize;
3283 xtensa->core_config->mpu.lockable = lockable;
3284 xtensa->core_config->mpu.execonly = execonly;
3288 COMMAND_HANDLER(xtensa_cmd_xtmpu)
3290 return CALL_COMMAND_HANDLER(xtensa_cmd_xtmpu_do,
3291 target_to_xtensa(get_current_target(CMD_CTX)));
3294 /* xtmmu <NIREFILLENTRIES> <NDREFILLENTRIES> <IVARWAY56> <DVARWAY56> */
3295 COMMAND_HELPER(xtensa_cmd_xtmmu_do, struct xtensa *xtensa)
3297 if (CMD_ARGC != 2) {
3298 LOG_ERROR("xtmmu <NIREFILLENTRIES> <NDREFILLENTRIES>\n");
3299 return ERROR_COMMAND_SYNTAX_ERROR;
3302 unsigned int nirefillentries = strtoul(CMD_ARGV[0], NULL, 0);
3303 unsigned int ndrefillentries = strtoul(CMD_ARGV[1], NULL, 0);
3304 if ((nirefillentries != 16) && (nirefillentries != 32)) {
3305 LOG_ERROR("<nirefillentries> must be 16 or 32\n");
3306 return ERROR_COMMAND_ARGUMENT_INVALID;
3307 } else if ((ndrefillentries != 16) && (ndrefillentries != 32)) {
3308 LOG_ERROR("<ndrefillentries> must be 16 or 32\n");
3309 return ERROR_COMMAND_ARGUMENT_INVALID;
3312 xtensa->core_config->mmu.enabled = true;
3313 xtensa->core_config->mmu.itlb_entries_count = nirefillentries;
3314 xtensa->core_config->mmu.dtlb_entries_count = ndrefillentries;
3318 COMMAND_HANDLER(xtensa_cmd_xtmmu)
3320 return CALL_COMMAND_HANDLER(xtensa_cmd_xtmmu_do,
3321 target_to_xtensa(get_current_target(CMD_CTX)));
3325 * xtreg <regname> <regnum> */
3326 COMMAND_HELPER(xtensa_cmd_xtreg_do, struct xtensa *xtensa)
3328 if (CMD_ARGC == 1) {
3329 int32_t numregs = strtoul(CMD_ARGV[0], NULL, 0);
3330 if ((numregs <= 0) || (numregs > UINT16_MAX)) {
3331 LOG_ERROR("xtreg <numregs>: Invalid 'numregs' (%d)", numregs);
3332 return ERROR_COMMAND_SYNTAX_ERROR;
3334 if ((xtensa->genpkt_regs_num > 0) && (numregs < (int32_t)xtensa->genpkt_regs_num)) {
3335 LOG_ERROR("xtregs (%d) must be larger than numgenregs (%d) (if xtregfmt specified)",
3336 numregs, xtensa->genpkt_regs_num);
3337 return ERROR_COMMAND_SYNTAX_ERROR;
3339 xtensa->total_regs_num = numregs;
3340 xtensa->core_regs_num = 0;
3341 xtensa->num_optregs = 0;
3342 /* A little more memory than required, but saves a second initialization pass */
3343 xtensa->optregs = calloc(xtensa->total_regs_num, sizeof(struct xtensa_reg_desc));
3344 if (!xtensa->optregs) {
3345 LOG_ERROR("Failed to allocate xtensa->optregs!");
3349 } else if (CMD_ARGC != 2)
3350 return ERROR_COMMAND_SYNTAX_ERROR;
3352 /* "xtregfmt contiguous" must be specified prior to the first "xtreg" definition
3353 * if general register (g-packet) requests or contiguous register maps are supported */
3354 if (xtensa->regmap_contiguous && !xtensa->contiguous_regs_desc) {
3355 xtensa->contiguous_regs_desc = calloc(xtensa->total_regs_num, sizeof(struct xtensa_reg_desc *));
3356 if (!xtensa->contiguous_regs_desc) {
3357 LOG_ERROR("Failed to allocate xtensa->contiguous_regs_desc!");
3362 const char *regname = CMD_ARGV[0];
3363 unsigned int regnum = strtoul(CMD_ARGV[1], NULL, 0);
3364 if (regnum > UINT16_MAX) {
3365 LOG_ERROR("<regnum> must be a 16-bit number");
3366 return ERROR_COMMAND_ARGUMENT_INVALID;
3369 if ((xtensa->num_optregs + xtensa->core_regs_num) >= xtensa->total_regs_num) {
3370 if (xtensa->total_regs_num)
3371 LOG_ERROR("'xtreg %s 0x%04x': Too many registers (%d expected, %d core %d extended)",
3373 xtensa->total_regs_num, xtensa->core_regs_num, xtensa->num_optregs);
3375 LOG_ERROR("'xtreg %s 0x%04x': Number of registers unspecified",
3380 /* Determine whether register belongs in xtensa_regs[] or xtensa->xtensa_spec_regs[] */
3381 struct xtensa_reg_desc *rptr = &xtensa->optregs[xtensa->num_optregs];
3382 bool is_extended_reg = true;
3384 for (ridx = 0; ridx < XT_NUM_REGS; ridx++) {
3385 if (strcmp(CMD_ARGV[0], xtensa_regs[ridx].name) == 0) {
3386 /* Flag core register as defined */
3387 rptr = &xtensa_regs[ridx];
3388 xtensa->core_regs_num++;
3389 is_extended_reg = false;
3395 if (is_extended_reg) {
3396 /* Register ID, debugger-visible register ID */
3397 rptr->name = strdup(CMD_ARGV[0]);
3398 rptr->dbreg_num = regnum;
3399 rptr->reg_num = (regnum & XT_REG_INDEX_MASK);
3400 xtensa->num_optregs++;
3403 if ((regnum & XT_REG_GENERAL_MASK) == XT_REG_GENERAL_VAL) {
3404 rptr->type = XT_REG_GENERAL;
3405 } else if ((regnum & XT_REG_USER_MASK) == XT_REG_USER_VAL) {
3406 rptr->type = XT_REG_USER;
3407 } else if ((regnum & XT_REG_FR_MASK) == XT_REG_FR_VAL) {
3408 rptr->type = XT_REG_FR;
3409 } else if ((regnum & XT_REG_SPECIAL_MASK) == XT_REG_SPECIAL_VAL) {
3410 rptr->type = XT_REG_SPECIAL;
3411 } else if ((regnum & XT_REG_RELGEN_MASK) == XT_REG_RELGEN_VAL) {
3412 /* WARNING: For these registers, regnum points to the
3413 * index of the corresponding ARx registers, NOT to
3414 * the processor register number! */
3415 rptr->type = XT_REG_RELGEN;
3416 rptr->reg_num += XT_REG_IDX_ARFIRST;
3417 rptr->dbreg_num += XT_REG_IDX_ARFIRST;
3418 } else if ((regnum & XT_REG_TIE_MASK) != 0) {
3419 rptr->type = XT_REG_TIE;
3421 rptr->type = XT_REG_OTHER;
3424 /* Register flags */
3425 if ((strcmp(rptr->name, "mmid") == 0) || (strcmp(rptr->name, "eraccess") == 0) ||
3426 (strcmp(rptr->name, "ddr") == 0) || (strcmp(rptr->name, "intset") == 0) ||
3427 (strcmp(rptr->name, "intclear") == 0))
3428 rptr->flags = XT_REGF_NOREAD;
3432 if ((rptr->reg_num == (XT_PS_REG_NUM_BASE + xtensa->core_config->debug.irq_level)) &&
3433 (xtensa->core_config->core_type == XT_LX) && (rptr->type == XT_REG_SPECIAL)) {
3434 xtensa->eps_dbglevel_idx = XT_NUM_REGS + xtensa->num_optregs - 1;
3435 LOG_DEBUG("Setting PS (%s) index to %d", rptr->name, xtensa->eps_dbglevel_idx);
3437 } else if (strcmp(rptr->name, "cpenable") == 0) {
3438 xtensa->core_config->coproc = true;
3441 /* Build out list of contiguous registers in specified order */
3442 unsigned int running_reg_count = xtensa->num_optregs + xtensa->core_regs_num;
3443 if (xtensa->contiguous_regs_desc) {
3444 assert((running_reg_count <= xtensa->total_regs_num) && "contiguous register address internal error!");
3445 xtensa->contiguous_regs_desc[running_reg_count - 1] = rptr;
3447 if (xtensa_extra_debug_log)
3448 LOG_DEBUG("Added %s register %-16s: 0x%04x/0x%02x t%d (%d of %d)",
3449 is_extended_reg ? "config-specific" : "core",
3450 rptr->name, rptr->dbreg_num, rptr->reg_num, rptr->type,
3451 is_extended_reg ? xtensa->num_optregs : ridx,
3452 is_extended_reg ? xtensa->total_regs_num : XT_NUM_REGS);
3456 COMMAND_HANDLER(xtensa_cmd_xtreg)
3458 return CALL_COMMAND_HANDLER(xtensa_cmd_xtreg_do,
3459 target_to_xtensa(get_current_target(CMD_CTX)));
3462 /* xtregfmt <contiguous|sparse> [numgregs] */
3463 COMMAND_HELPER(xtensa_cmd_xtregfmt_do, struct xtensa *xtensa)
3465 if ((CMD_ARGC == 1) || (CMD_ARGC == 2)) {
3466 if (!strcasecmp(CMD_ARGV[0], "sparse")) {
3468 } else if (!strcasecmp(CMD_ARGV[0], "contiguous")) {
3469 xtensa->regmap_contiguous = true;
3470 if (CMD_ARGC == 2) {
3471 unsigned int numgregs = strtoul(CMD_ARGV[1], NULL, 0);
3472 if ((numgregs <= 0) ||
3473 ((numgregs > xtensa->total_regs_num) &&
3474 (xtensa->total_regs_num > 0))) {
3475 LOG_ERROR("xtregfmt: if specified, numgregs (%d) must be <= numregs (%d)",
3476 numgregs, xtensa->total_regs_num);
3477 return ERROR_COMMAND_SYNTAX_ERROR;
3479 xtensa->genpkt_regs_num = numgregs;
3484 return ERROR_COMMAND_SYNTAX_ERROR;
3487 COMMAND_HANDLER(xtensa_cmd_xtregfmt)
3489 return CALL_COMMAND_HANDLER(xtensa_cmd_xtregfmt_do,
3490 target_to_xtensa(get_current_target(CMD_CTX)));
3493 COMMAND_HELPER(xtensa_cmd_permissive_mode_do, struct xtensa *xtensa)
3495 return CALL_COMMAND_HANDLER(handle_command_parse_bool,
3496 &xtensa->permissive_mode, "xtensa permissive mode");
3499 COMMAND_HANDLER(xtensa_cmd_permissive_mode)
3501 return CALL_COMMAND_HANDLER(xtensa_cmd_permissive_mode_do,
3502 target_to_xtensa(get_current_target(CMD_CTX)));
3505 /* perfmon_enable <counter_id> <select> [mask] [kernelcnt] [tracelevel] */
3506 COMMAND_HELPER(xtensa_cmd_perfmon_enable_do, struct xtensa *xtensa)
3508 struct xtensa_perfmon_config config = {
3511 .tracelevel = -1 /* use DEBUGLEVEL by default */
3514 if (CMD_ARGC < 2 || CMD_ARGC > 6)
3515 return ERROR_COMMAND_SYNTAX_ERROR;
3517 unsigned int counter_id = strtoul(CMD_ARGV[0], NULL, 0);
3518 if (counter_id >= XTENSA_MAX_PERF_COUNTERS) {
3519 command_print(CMD, "counter_id should be < %d", XTENSA_MAX_PERF_COUNTERS);
3520 return ERROR_COMMAND_ARGUMENT_INVALID;
3523 config.select = strtoul(CMD_ARGV[1], NULL, 0);
3524 if (config.select > XTENSA_MAX_PERF_SELECT) {
3525 command_print(CMD, "select should be < %d", XTENSA_MAX_PERF_SELECT);
3526 return ERROR_COMMAND_ARGUMENT_INVALID;
3529 if (CMD_ARGC >= 3) {
3530 config.mask = strtoul(CMD_ARGV[2], NULL, 0);
3531 if (config.mask > XTENSA_MAX_PERF_MASK) {
3532 command_print(CMD, "mask should be < %d", XTENSA_MAX_PERF_MASK);
3533 return ERROR_COMMAND_ARGUMENT_INVALID;
3537 if (CMD_ARGC >= 4) {
3538 config.kernelcnt = strtoul(CMD_ARGV[3], NULL, 0);
3539 if (config.kernelcnt > 1) {
3540 command_print(CMD, "kernelcnt should be 0 or 1");
3541 return ERROR_COMMAND_ARGUMENT_INVALID;
3545 if (CMD_ARGC >= 5) {
3546 config.tracelevel = strtoul(CMD_ARGV[4], NULL, 0);
3547 if (config.tracelevel > 7) {
3548 command_print(CMD, "tracelevel should be <=7");
3549 return ERROR_COMMAND_ARGUMENT_INVALID;
3553 if (config.tracelevel == -1)
3554 config.tracelevel = xtensa->core_config->debug.irq_level;
3556 return xtensa_dm_perfmon_enable(&xtensa->dbg_mod, counter_id, &config);
3559 COMMAND_HANDLER(xtensa_cmd_perfmon_enable)
3561 return CALL_COMMAND_HANDLER(xtensa_cmd_perfmon_enable_do,
3562 target_to_xtensa(get_current_target(CMD_CTX)));
3565 /* perfmon_dump [counter_id] */
3566 COMMAND_HELPER(xtensa_cmd_perfmon_dump_do, struct xtensa *xtensa)
3569 return ERROR_COMMAND_SYNTAX_ERROR;
3571 int counter_id = -1;
3572 if (CMD_ARGC == 1) {
3573 counter_id = strtol(CMD_ARGV[0], NULL, 0);
3574 if (counter_id > XTENSA_MAX_PERF_COUNTERS) {
3575 command_print(CMD, "counter_id should be < %d", XTENSA_MAX_PERF_COUNTERS);
3576 return ERROR_COMMAND_ARGUMENT_INVALID;
3580 unsigned int counter_start = (counter_id < 0) ? 0 : counter_id;
3581 unsigned int counter_end = (counter_id < 0) ? XTENSA_MAX_PERF_COUNTERS : counter_id + 1;
3582 for (unsigned int counter = counter_start; counter < counter_end; ++counter) {
3583 char result_buf[128] = { 0 };
3584 size_t result_pos = snprintf(result_buf, sizeof(result_buf), "Counter %d: ", counter);
3585 struct xtensa_perfmon_result result;
3586 int res = xtensa_dm_perfmon_dump(&xtensa->dbg_mod, counter, &result);
3587 if (res != ERROR_OK)
3589 snprintf(result_buf + result_pos, sizeof(result_buf) - result_pos,
3592 result.overflow ? " (overflow)" : "");
3593 LOG_INFO("%s", result_buf);
3599 COMMAND_HANDLER(xtensa_cmd_perfmon_dump)
3601 return CALL_COMMAND_HANDLER(xtensa_cmd_perfmon_dump_do,
3602 target_to_xtensa(get_current_target(CMD_CTX)));
3605 COMMAND_HELPER(xtensa_cmd_mask_interrupts_do, struct xtensa *xtensa)
3611 state = xtensa->stepping_isr_mode;
3612 if (state == XT_STEPPING_ISR_ON)
3614 else if (state == XT_STEPPING_ISR_OFF)
3618 command_print(CMD, "Current ISR step mode: %s", st);
3621 /* Masking is ON -> interrupts during stepping are OFF, and vice versa */
3622 if (!strcasecmp(CMD_ARGV[0], "off"))
3623 state = XT_STEPPING_ISR_ON;
3624 else if (!strcasecmp(CMD_ARGV[0], "on"))
3625 state = XT_STEPPING_ISR_OFF;
3628 command_print(CMD, "Argument unknown. Please pick one of ON, OFF");
3631 xtensa->stepping_isr_mode = state;
3635 COMMAND_HANDLER(xtensa_cmd_mask_interrupts)
3637 return CALL_COMMAND_HANDLER(xtensa_cmd_mask_interrupts_do,
3638 target_to_xtensa(get_current_target(CMD_CTX)));
3641 COMMAND_HELPER(xtensa_cmd_smpbreak_do, struct target *target)
3646 if (CMD_ARGC >= 1) {
3647 for (unsigned int i = 0; i < CMD_ARGC; i++) {
3648 if (!strcasecmp(CMD_ARGV[0], "none")) {
3650 } else if (!strcasecmp(CMD_ARGV[i], "BreakIn")) {
3651 val |= OCDDCR_BREAKINEN;
3652 } else if (!strcasecmp(CMD_ARGV[i], "BreakOut")) {
3653 val |= OCDDCR_BREAKOUTEN;
3654 } else if (!strcasecmp(CMD_ARGV[i], "RunStallIn")) {
3655 val |= OCDDCR_RUNSTALLINEN;
3656 } else if (!strcasecmp(CMD_ARGV[i], "DebugModeOut")) {
3657 val |= OCDDCR_DEBUGMODEOUTEN;
3658 } else if (!strcasecmp(CMD_ARGV[i], "BreakInOut")) {
3659 val |= OCDDCR_BREAKINEN | OCDDCR_BREAKOUTEN;
3660 } else if (!strcasecmp(CMD_ARGV[i], "RunStall")) {
3661 val |= OCDDCR_RUNSTALLINEN | OCDDCR_DEBUGMODEOUTEN;
3663 command_print(CMD, "Unknown arg %s", CMD_ARGV[i]);
3666 "use either BreakInOut, None or RunStall as arguments, or any combination of BreakIn, BreakOut, RunStallIn and DebugModeOut.");
3670 res = xtensa_smpbreak_set(target, val);
3671 if (res != ERROR_OK)
3672 command_print(CMD, "Failed to set smpbreak config %d", res);
3674 struct xtensa *xtensa = target_to_xtensa(target);
3675 res = xtensa_smpbreak_read(xtensa, &val);
3676 if (res == ERROR_OK)
3677 command_print(CMD, "Current bits set:%s%s%s%s",
3678 (val & OCDDCR_BREAKINEN) ? " BreakIn" : "",
3679 (val & OCDDCR_BREAKOUTEN) ? " BreakOut" : "",
3680 (val & OCDDCR_RUNSTALLINEN) ? " RunStallIn" : "",
3681 (val & OCDDCR_DEBUGMODEOUTEN) ? " DebugModeOut" : ""
3684 command_print(CMD, "Failed to get smpbreak config %d", res);
3689 COMMAND_HANDLER(xtensa_cmd_smpbreak)
3691 return CALL_COMMAND_HANDLER(xtensa_cmd_smpbreak_do,
3692 get_current_target(CMD_CTX));
3695 COMMAND_HELPER(xtensa_cmd_tracestart_do, struct xtensa *xtensa)
3697 struct xtensa_trace_status trace_status;
3698 struct xtensa_trace_start_config cfg = {
3700 .stopmask = XTENSA_STOPMASK_DISABLED,
3702 .after_is_words = false
3705 /* Parse arguments */
3706 for (unsigned int i = 0; i < CMD_ARGC; i++) {
3707 if ((!strcasecmp(CMD_ARGV[i], "pc")) && CMD_ARGC > i) {
3710 cfg.stoppc = strtol(CMD_ARGV[i], &e, 0);
3713 cfg.stopmask = strtol(e, NULL, 0);
3714 } else if ((!strcasecmp(CMD_ARGV[i], "after")) && CMD_ARGC > i) {
3716 cfg.after = strtol(CMD_ARGV[i], NULL, 0);
3717 } else if (!strcasecmp(CMD_ARGV[i], "ins")) {
3718 cfg.after_is_words = 0;
3719 } else if (!strcasecmp(CMD_ARGV[i], "words")) {
3720 cfg.after_is_words = 1;
3722 command_print(CMD, "Did not understand %s", CMD_ARGV[i]);
3727 int res = xtensa_dm_trace_status_read(&xtensa->dbg_mod, &trace_status);
3728 if (res != ERROR_OK)
3730 if (trace_status.stat & TRAXSTAT_TRACT) {
3731 LOG_WARNING("Silently stop active tracing!");
3732 res = xtensa_dm_trace_stop(&xtensa->dbg_mod, false);
3733 if (res != ERROR_OK)
3737 res = xtensa_dm_trace_start(&xtensa->dbg_mod, &cfg);
3738 if (res != ERROR_OK)
3741 xtensa->trace_active = true;
3742 command_print(CMD, "Trace started.");
3746 COMMAND_HANDLER(xtensa_cmd_tracestart)
3748 return CALL_COMMAND_HANDLER(xtensa_cmd_tracestart_do,
3749 target_to_xtensa(get_current_target(CMD_CTX)));
3752 COMMAND_HELPER(xtensa_cmd_tracestop_do, struct xtensa *xtensa)
3754 struct xtensa_trace_status trace_status;
3756 int res = xtensa_dm_trace_status_read(&xtensa->dbg_mod, &trace_status);
3757 if (res != ERROR_OK)
3760 if (!(trace_status.stat & TRAXSTAT_TRACT)) {
3761 command_print(CMD, "No trace is currently active.");
3765 res = xtensa_dm_trace_stop(&xtensa->dbg_mod, true);
3766 if (res != ERROR_OK)
3769 xtensa->trace_active = false;
3770 command_print(CMD, "Trace stop triggered.");
3774 COMMAND_HANDLER(xtensa_cmd_tracestop)
3776 return CALL_COMMAND_HANDLER(xtensa_cmd_tracestop_do,
3777 target_to_xtensa(get_current_target(CMD_CTX)));
3780 COMMAND_HELPER(xtensa_cmd_tracedump_do, struct xtensa *xtensa, const char *fname)
3782 struct xtensa_trace_config trace_config;
3783 struct xtensa_trace_status trace_status;
3784 uint32_t memsz, wmem;
3786 int res = xtensa_dm_trace_status_read(&xtensa->dbg_mod, &trace_status);
3787 if (res != ERROR_OK)
3790 if (trace_status.stat & TRAXSTAT_TRACT) {
3791 command_print(CMD, "Tracing is still active. Please stop it first.");
3795 res = xtensa_dm_trace_config_read(&xtensa->dbg_mod, &trace_config);
3796 if (res != ERROR_OK)
3799 if (!(trace_config.ctrl & TRAXCTRL_TREN)) {
3800 command_print(CMD, "No active trace found; nothing to dump.");
3804 memsz = trace_config.memaddr_end - trace_config.memaddr_start + 1;
3805 LOG_INFO("Total trace memory: %d words", memsz);
3806 if ((trace_config.addr &
3807 ((TRAXADDR_TWRAP_MASK << TRAXADDR_TWRAP_SHIFT) | TRAXADDR_TWSAT)) == 0) {
3808 /*Memory hasn't overwritten itself yet. */
3809 wmem = trace_config.addr & TRAXADDR_TADDR_MASK;
3810 LOG_INFO("...but trace is only %d words", wmem);
3814 if (trace_config.addr & TRAXADDR_TWSAT) {
3815 LOG_INFO("Real trace is many times longer than that (overflow)");
3817 uint32_t trc_sz = (trace_config.addr >> TRAXADDR_TWRAP_SHIFT) & TRAXADDR_TWRAP_MASK;
3818 trc_sz = (trc_sz * memsz) + (trace_config.addr & TRAXADDR_TADDR_MASK);
3819 LOG_INFO("Real trace is %d words, but the start has been truncated.", trc_sz);
3823 uint8_t *tracemem = malloc(memsz * 4);
3825 command_print(CMD, "Failed to alloc memory for trace data!");
3828 res = xtensa_dm_trace_data_read(&xtensa->dbg_mod, tracemem, memsz * 4);
3829 if (res != ERROR_OK) {
3834 int f = open(fname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
3837 command_print(CMD, "Unable to open file %s", fname);
3840 if (write(f, tracemem, memsz * 4) != (int)memsz * 4)
3841 command_print(CMD, "Unable to write to file %s", fname);
3843 command_print(CMD, "Written %d bytes of trace data to %s", memsz * 4, fname);
3846 bool is_all_zeroes = true;
3847 for (unsigned int i = 0; i < memsz * 4; i++) {
3848 if (tracemem[i] != 0) {
3849 is_all_zeroes = false;
3857 "WARNING: File written is all zeroes. Are you sure you enabled trace memory?");
3862 COMMAND_HANDLER(xtensa_cmd_tracedump)
3864 if (CMD_ARGC != 1) {
3865 command_print(CMD, "Command takes exactly 1 parameter.Need filename to dump to as output!");
3869 return CALL_COMMAND_HANDLER(xtensa_cmd_tracedump_do,
3870 target_to_xtensa(get_current_target(CMD_CTX)), CMD_ARGV[0]);
3873 static const struct command_registration xtensa_any_command_handlers[] = {
3876 .handler = xtensa_cmd_xtdef,
3877 .mode = COMMAND_CONFIG,
3878 .help = "Configure Xtensa core type",
3883 .handler = xtensa_cmd_xtopt,
3884 .mode = COMMAND_CONFIG,
3885 .help = "Configure Xtensa core option",
3886 .usage = "<name> <value>",
3890 .handler = xtensa_cmd_xtmem,
3891 .mode = COMMAND_CONFIG,
3892 .help = "Configure Xtensa memory/cache option",
3893 .usage = "<type> [parameters]",
3897 .handler = xtensa_cmd_xtmmu,
3898 .mode = COMMAND_CONFIG,
3899 .help = "Configure Xtensa MMU option",
3900 .usage = "<NIREFILLENTRIES> <NDREFILLENTRIES> <IVARWAY56> <DVARWAY56>",
3904 .handler = xtensa_cmd_xtmpu,
3905 .mode = COMMAND_CONFIG,
3906 .help = "Configure Xtensa MPU option",
3907 .usage = "<num FG seg> <min seg size> <lockable> <executeonly>",
3911 .handler = xtensa_cmd_xtreg,
3912 .mode = COMMAND_CONFIG,
3913 .help = "Configure Xtensa register",
3914 .usage = "<regname> <regnum>",
3918 .handler = xtensa_cmd_xtreg,
3919 .mode = COMMAND_CONFIG,
3920 .help = "Configure number of Xtensa registers",
3921 .usage = "<numregs>",
3925 .handler = xtensa_cmd_xtregfmt,
3926 .mode = COMMAND_CONFIG,
3927 .help = "Configure format of Xtensa register map",
3928 .usage = "<contiguous|sparse> [numgregs]",
3931 .name = "set_permissive",
3932 .handler = xtensa_cmd_permissive_mode,
3933 .mode = COMMAND_ANY,
3934 .help = "When set to 1, enable Xtensa permissive mode (fewer client-side checks)",
3939 .handler = xtensa_cmd_mask_interrupts,
3940 .mode = COMMAND_ANY,
3941 .help = "mask Xtensa interrupts at step",
3942 .usage = "['on'|'off']",
3946 .handler = xtensa_cmd_smpbreak,
3947 .mode = COMMAND_ANY,
3948 .help = "Set the way the CPU chains OCD breaks",
3949 .usage = "[none|breakinout|runstall] | [BreakIn] [BreakOut] [RunStallIn] [DebugModeOut]",
3952 .name = "perfmon_enable",
3953 .handler = xtensa_cmd_perfmon_enable,
3954 .mode = COMMAND_EXEC,
3955 .help = "Enable and start performance counter",
3956 .usage = "<counter_id> <select> [mask] [kernelcnt] [tracelevel]",
3959 .name = "perfmon_dump",
3960 .handler = xtensa_cmd_perfmon_dump,
3961 .mode = COMMAND_EXEC,
3962 .help = "Dump performance counter value. If no argument specified, dumps all counters.",
3963 .usage = "[counter_id]",
3966 .name = "tracestart",
3967 .handler = xtensa_cmd_tracestart,
3968 .mode = COMMAND_EXEC,
3970 "Tracing: Set up and start a trace. Optionally set stop trigger address and amount of data captured after.",
3971 .usage = "[pc <pcval>/[maskbitcount]] [after <n> [ins|words]]",
3974 .name = "tracestop",
3975 .handler = xtensa_cmd_tracestop,
3976 .mode = COMMAND_EXEC,
3977 .help = "Tracing: Stop current trace as started by the tracestart command",
3981 .name = "tracedump",
3982 .handler = xtensa_cmd_tracedump,
3983 .mode = COMMAND_EXEC,
3984 .help = "Tracing: Dump trace memory to a files. One file per core.",
3985 .usage = "<outfile>",
3989 .handler = xtensa_cmd_exe,
3990 .mode = COMMAND_ANY,
3991 .help = "Xtensa stub execution",
3992 .usage = "<ascii-encoded hexadecimal instruction bytes>",
3994 COMMAND_REGISTRATION_DONE
3997 const struct command_registration xtensa_command_handlers[] = {
4000 .mode = COMMAND_ANY,
4001 .help = "Xtensa command group",
4003 .chain = xtensa_any_command_handlers,
4005 COMMAND_REGISTRATION_DONE