openocd: src/target: replace the GPL-2.0-or-later license tag
[fw/openocd] / src / target / cortex_m.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2
3 /***************************************************************************
4  *   Copyright (C) 2005 by Dominic Rath                                    *
5  *   Dominic.Rath@gmx.de                                                   *
6  *                                                                         *
7  *   Copyright (C) 2006 by Magnus Lundin                                   *
8  *   lundin@mlu.mine.nu                                                    *
9  *                                                                         *
10  *   Copyright (C) 2008 by Spencer Oliver                                  *
11  *   spen@spen-soft.co.uk                                                  *
12  ***************************************************************************/
13
14 #ifndef OPENOCD_TARGET_CORTEX_M_H
15 #define OPENOCD_TARGET_CORTEX_M_H
16
17 #include "armv7m.h"
18 #include "helper/bits.h"
19
20 #define CORTEX_M_COMMON_MAGIC 0x1A451A45
21
22 #define SYSTEM_CONTROL_BASE 0x400FE000
23
24 #define ITM_TER0        0xE0000E00
25 #define ITM_TPR         0xE0000E40
26 #define ITM_TCR         0xE0000E80
27 #define ITM_TCR_ITMENA_BIT      BIT(0)
28 #define ITM_TCR_BUSY_BIT        BIT(23)
29 #define ITM_LAR         0xE0000FB0
30 #define ITM_LAR_KEY     0xC5ACCE55
31
32 #define CPUID           0xE000ED00
33
34 #define ARM_CPUID_PARTNO_POS    4
35 #define ARM_CPUID_PARTNO_MASK   (0xFFF << ARM_CPUID_PARTNO_POS)
36
37 enum cortex_m_partno {
38         CORTEX_M_PARTNO_INVALID,
39         CORTEX_M0_PARTNO   = 0xC20,
40         CORTEX_M1_PARTNO   = 0xC21,
41         CORTEX_M3_PARTNO   = 0xC23,
42         CORTEX_M4_PARTNO   = 0xC24,
43         CORTEX_M7_PARTNO   = 0xC27,
44         CORTEX_M0P_PARTNO  = 0xC60,
45         CORTEX_M23_PARTNO  = 0xD20,
46         CORTEX_M33_PARTNO  = 0xD21,
47         CORTEX_M35P_PARTNO = 0xD31,
48         CORTEX_M55_PARTNO  = 0xD22,
49 };
50
51 /* Relevant Cortex-M flags, used in struct cortex_m_part_info.flags */
52 #define CORTEX_M_F_HAS_FPV4               BIT(0)
53 #define CORTEX_M_F_HAS_FPV5               BIT(1)
54 #define CORTEX_M_F_TAR_AUTOINCR_BLOCK_4K  BIT(2)
55
56 struct cortex_m_part_info {
57         enum cortex_m_partno partno;
58         const char *name;
59         enum arm_arch arch;
60         uint32_t flags;
61 };
62
63 /* Debug Control Block */
64 #define DCB_DHCSR       0xE000EDF0
65 #define DCB_DCRSR       0xE000EDF4
66 #define DCB_DCRDR       0xE000EDF8
67 #define DCB_DEMCR       0xE000EDFC
68 #define DCB_DSCSR       0xE000EE08
69
70 #define DCRSR_WNR       BIT(16)
71
72 #define DWT_CTRL        0xE0001000
73 #define DWT_CYCCNT      0xE0001004
74 #define DWT_PCSR        0xE000101C
75 #define DWT_COMP0       0xE0001020
76 #define DWT_MASK0       0xE0001024
77 #define DWT_FUNCTION0   0xE0001028
78 #define DWT_DEVARCH             0xE0001FBC
79
80 #define DWT_DEVARCH_ARMV8M      0x101A02
81
82 #define FP_CTRL         0xE0002000
83 #define FP_REMAP        0xE0002004
84 #define FP_COMP0        0xE0002008
85 #define FP_COMP1        0xE000200C
86 #define FP_COMP2        0xE0002010
87 #define FP_COMP3        0xE0002014
88 #define FP_COMP4        0xE0002018
89 #define FP_COMP5        0xE000201C
90 #define FP_COMP6        0xE0002020
91 #define FP_COMP7        0xE0002024
92
93 #define FPU_CPACR       0xE000ED88
94 #define FPU_FPCCR       0xE000EF34
95 #define FPU_FPCAR       0xE000EF38
96 #define FPU_FPDSCR      0xE000EF3C
97
98 #define TPIU_SSPSR      0xE0040000
99 #define TPIU_CSPSR      0xE0040004
100 #define TPIU_ACPR       0xE0040010
101 #define TPIU_SPPR       0xE00400F0
102 #define TPIU_FFSR       0xE0040300
103 #define TPIU_FFCR       0xE0040304
104 #define TPIU_FSCR       0xE0040308
105
106 /* Maximum SWO prescaler value. */
107 #define TPIU_ACPR_MAX_SWOSCALER 0x1fff
108
109 /* DCB_DHCSR bit and field definitions */
110 #define DBGKEY          (0xA05Ful << 16)
111 #define C_DEBUGEN       BIT(0)
112 #define C_HALT          BIT(1)
113 #define C_STEP          BIT(2)
114 #define C_MASKINTS      BIT(3)
115 #define S_REGRDY        BIT(16)
116 #define S_HALT          BIT(17)
117 #define S_SLEEP         BIT(18)
118 #define S_LOCKUP        BIT(19)
119 #define S_RETIRE_ST     BIT(24)
120 #define S_RESET_ST      BIT(25)
121
122 /* DCB_DEMCR bit and field definitions */
123 #define TRCENA                  BIT(24)
124 #define VC_HARDERR              BIT(10)
125 #define VC_INTERR               BIT(9)
126 #define VC_BUSERR               BIT(8)
127 #define VC_STATERR              BIT(7)
128 #define VC_CHKERR               BIT(6)
129 #define VC_NOCPERR              BIT(5)
130 #define VC_MMERR                BIT(4)
131 #define VC_CORERESET    BIT(0)
132
133 /* DCB_DSCSR bit and field definitions */
134 #define DSCSR_CDS               BIT(16)
135
136 /* NVIC registers */
137 #define NVIC_ICTR               0xE000E004
138 #define NVIC_ISE0               0xE000E100
139 #define NVIC_ICSR               0xE000ED04
140 #define NVIC_AIRCR              0xE000ED0C
141 #define NVIC_SHCSR              0xE000ED24
142 #define NVIC_CFSR               0xE000ED28
143 #define NVIC_MMFSRB             0xE000ED28
144 #define NVIC_BFSRB              0xE000ED29
145 #define NVIC_USFSRH             0xE000ED2A
146 #define NVIC_HFSR               0xE000ED2C
147 #define NVIC_DFSR               0xE000ED30
148 #define NVIC_MMFAR              0xE000ED34
149 #define NVIC_BFAR               0xE000ED38
150 #define NVIC_SFSR               0xE000EDE4
151 #define NVIC_SFAR               0xE000EDE8
152
153 /* NVIC_AIRCR bits */
154 #define AIRCR_VECTKEY           (0x5FAul << 16)
155 #define AIRCR_SYSRESETREQ       BIT(2)
156 #define AIRCR_VECTCLRACTIVE     BIT(1)
157 #define AIRCR_VECTRESET         BIT(0)
158 /* NVIC_SHCSR bits */
159 #define SHCSR_BUSFAULTENA       BIT(17)
160 /* NVIC_DFSR bits */
161 #define DFSR_HALTED                     1
162 #define DFSR_BKPT                       2
163 #define DFSR_DWTTRAP            4
164 #define DFSR_VCATCH                     8
165 #define DFSR_EXTERNAL           16
166
167 #define FPCR_CODE 0
168 #define FPCR_LITERAL 1
169 #define FPCR_REPLACE_REMAP  (0ul << 30)
170 #define FPCR_REPLACE_BKPT_LOW  (1ul << 30)
171 #define FPCR_REPLACE_BKPT_HIGH  (2ul << 30)
172 #define FPCR_REPLACE_BKPT_BOTH  (3ul << 30)
173
174 struct cortex_m_fp_comparator {
175         bool used;
176         int type;
177         uint32_t fpcr_value;
178         uint32_t fpcr_address;
179 };
180
181 struct cortex_m_dwt_comparator {
182         bool used;
183         uint32_t comp;
184         uint32_t mask;
185         uint32_t function;
186         uint32_t dwt_comparator_address;
187 };
188
189 enum cortex_m_soft_reset_config {
190         CORTEX_M_RESET_SYSRESETREQ,
191         CORTEX_M_RESET_VECTRESET,
192 };
193
194 enum cortex_m_isrmasking_mode {
195         CORTEX_M_ISRMASK_AUTO,
196         CORTEX_M_ISRMASK_OFF,
197         CORTEX_M_ISRMASK_ON,
198         CORTEX_M_ISRMASK_STEPONLY,
199 };
200
201 struct cortex_m_common {
202         int common_magic;
203
204         /* Context information */
205         uint32_t dcb_dhcsr;
206         uint32_t dcb_dhcsr_cumulated_sticky;
207         uint32_t nvic_dfsr;  /* Debug Fault Status Register - shows reason for debug halt */
208         uint32_t nvic_icsr;  /* Interrupt Control State Register - shows active and pending IRQ */
209
210         /* Flash Patch and Breakpoint (FPB) */
211         unsigned int fp_num_lit;
212         unsigned int fp_num_code;
213         int fp_rev;
214         bool fpb_enabled;
215         struct cortex_m_fp_comparator *fp_comparator_list;
216
217         /* Data Watchpoint and Trace (DWT) */
218         unsigned int dwt_num_comp;
219         unsigned int dwt_comp_available;
220         uint32_t dwt_devarch;
221         struct cortex_m_dwt_comparator *dwt_comparator_list;
222         struct reg_cache *dwt_cache;
223
224         enum cortex_m_soft_reset_config soft_reset_config;
225         bool vectreset_supported;
226         enum cortex_m_isrmasking_mode isrmasking_mode;
227
228         const struct cortex_m_part_info *core_info;
229         struct armv7m_common armv7m;
230
231         bool slow_register_read;        /* A register has not been ready, poll S_REGRDY */
232
233         uint64_t apsel;
234
235         /* Whether this target has the erratum that makes C_MASKINTS not apply to
236          * already pending interrupts */
237         bool maskints_erratum;
238 };
239
240 static inline bool is_cortex_m_or_hla(const struct cortex_m_common *cortex_m)
241 {
242         return cortex_m->common_magic == CORTEX_M_COMMON_MAGIC;
243 }
244
245 static inline bool is_cortex_m_with_dap_access(const struct cortex_m_common *cortex_m)
246 {
247         if (!is_cortex_m_or_hla(cortex_m))
248                 return false;
249
250         return !cortex_m->armv7m.is_hla_target;
251 }
252
253 /**
254  * @returns the pointer to the target specific struct
255  * without matching a magic number.
256  * Use in target specific service routines, where the correct
257  * type of arch_info is certain.
258  */
259 static inline struct cortex_m_common *
260 target_to_cm(struct target *target)
261 {
262         return container_of(target->arch_info,
263                         struct cortex_m_common, armv7m.arm);
264 }
265
266 /**
267  * @returns the pointer to the target specific struct
268  * or NULL if the magic number does not match.
269  * Use in a flash driver or any place where mismatch of the arch_info
270  * type can happen.
271  */
272 static inline struct cortex_m_common *
273 target_to_cortex_m_safe(struct target *target)
274 {
275         /* Check the parent types first to prevent peeking memory too far
276          * from arch_info pointer */
277         if (!target_to_armv7m_safe(target))
278                 return NULL;
279
280         struct cortex_m_common *cortex_m = target_to_cm(target);
281         if (!is_cortex_m_or_hla(cortex_m))
282                 return NULL;
283
284         return cortex_m;
285 }
286
287 /**
288  * @returns cached value of Cortex-M part number
289  * or CORTEX_M_PARTNO_INVALID if the magic number does not match
290  * or core_info is not initialised.
291  */
292 static inline enum cortex_m_partno cortex_m_get_partno_safe(struct target *target)
293 {
294         struct cortex_m_common *cortex_m = target_to_cortex_m_safe(target);
295         if (!cortex_m)
296                 return CORTEX_M_PARTNO_INVALID;
297
298         if (!cortex_m->core_info)
299                 return CORTEX_M_PARTNO_INVALID;
300
301         return cortex_m->core_info->partno;
302 }
303
304 int cortex_m_examine(struct target *target);
305 int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint);
306 int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoint);
307 int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint);
308 int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpoint);
309 int cortex_m_add_watchpoint(struct target *target, struct watchpoint *watchpoint);
310 int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpoint);
311 void cortex_m_enable_breakpoints(struct target *target);
312 void cortex_m_enable_watchpoints(struct target *target);
313 void cortex_m_deinit_target(struct target *target);
314 int cortex_m_profiling(struct target *target, uint32_t *samples,
315         uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
316
317 #endif /* OPENOCD_TARGET_CORTEX_M_H */