Support for debugging on ARMv8-M CPUs
[fw/openocd] / src / target / cortex_m.h
1 /***************************************************************************
2  *   Copyright (C) 2005 by Dominic Rath                                    *
3  *   Dominic.Rath@gmx.de                                                   *
4  *                                                                         *
5  *   Copyright (C) 2006 by Magnus Lundin                                   *
6  *   lundin@mlu.mine.nu                                                    *
7  *                                                                         *
8  *   Copyright (C) 2008 by Spencer Oliver                                  *
9  *   spen@spen-soft.co.uk                                                  *
10  *                                                                         *
11  *   This program is free software; you can redistribute it and/or modify  *
12  *   it under the terms of the GNU General Public License as published by  *
13  *   the Free Software Foundation; either version 2 of the License, or     *
14  *   (at your option) any later version.                                   *
15  *                                                                         *
16  *   This program is distributed in the hope that it will be useful,       *
17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
19  *   GNU General Public License for more details.                          *
20  *                                                                         *
21  *   You should have received a copy of the GNU General Public License     *
22  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
23  ***************************************************************************/
24
25 #ifndef OPENOCD_TARGET_CORTEX_M_H
26 #define OPENOCD_TARGET_CORTEX_M_H
27
28 #include "armv7m.h"
29
30 #define CORTEX_M_COMMON_MAGIC 0x1A451A45
31
32 #define SYSTEM_CONTROL_BASE 0x400FE000
33
34 #define ITM_TER0        0xE0000E00
35 #define ITM_TPR         0xE0000E40
36 #define ITM_TCR         0xE0000E80
37 #define ITM_LAR         0xE0000FB0
38 #define ITM_LAR_KEY     0xC5ACCE55
39
40 #define CPUID           0xE000ED00
41
42 #define ARM_CPUID_PARTNO_MASK   0xFFF0
43
44 #define CORTEX_M23_PARTNO       0xD200
45 #define CORTEX_M33_PARTNO       0xD210
46
47 /* Debug Control Block */
48 #define DCB_DHCSR       0xE000EDF0
49 #define DCB_DCRSR       0xE000EDF4
50 #define DCB_DCRDR       0xE000EDF8
51 #define DCB_DEMCR       0xE000EDFC
52
53 #define DCRSR_WnR       (1 << 16)
54
55 #define DWT_CTRL        0xE0001000
56 #define DWT_CYCCNT      0xE0001004
57 #define DWT_PCSR        0xE000101C
58 #define DWT_COMP0       0xE0001020
59 #define DWT_MASK0       0xE0001024
60 #define DWT_FUNCTION0   0xE0001028
61 #define DWT_DEVARCH             0xE0001FBC
62
63 #define DWT_DEVARCH_ARMV8M      0x101A02
64
65 #define FP_CTRL         0xE0002000
66 #define FP_REMAP        0xE0002004
67 #define FP_COMP0        0xE0002008
68 #define FP_COMP1        0xE000200C
69 #define FP_COMP2        0xE0002010
70 #define FP_COMP3        0xE0002014
71 #define FP_COMP4        0xE0002018
72 #define FP_COMP5        0xE000201C
73 #define FP_COMP6        0xE0002020
74 #define FP_COMP7        0xE0002024
75
76 #define FPU_CPACR       0xE000ED88
77 #define FPU_FPCCR       0xE000EF34
78 #define FPU_FPCAR       0xE000EF38
79 #define FPU_FPDSCR      0xE000EF3C
80
81 #define TPIU_SSPSR      0xE0040000
82 #define TPIU_CSPSR      0xE0040004
83 #define TPIU_ACPR       0xE0040010
84 #define TPIU_SPPR       0xE00400F0
85 #define TPIU_FFSR       0xE0040300
86 #define TPIU_FFCR       0xE0040304
87 #define TPIU_FSCR       0xE0040308
88
89 /* DCB_DHCSR bit and field definitions */
90 #define DBGKEY          (0xA05F << 16)
91 #define C_DEBUGEN       (1 << 0)
92 #define C_HALT          (1 << 1)
93 #define C_STEP          (1 << 2)
94 #define C_MASKINTS      (1 << 3)
95 #define S_REGRDY        (1 << 16)
96 #define S_HALT          (1 << 17)
97 #define S_SLEEP         (1 << 18)
98 #define S_LOCKUP        (1 << 19)
99 #define S_RETIRE_ST     (1 << 24)
100 #define S_RESET_ST      (1 << 25)
101
102 /* DCB_DEMCR bit and field definitions */
103 #define TRCENA                  (1 << 24)
104 #define VC_HARDERR              (1 << 10)
105 #define VC_INTERR               (1 << 9)
106 #define VC_BUSERR               (1 << 8)
107 #define VC_STATERR              (1 << 7)
108 #define VC_CHKERR               (1 << 6)
109 #define VC_NOCPERR              (1 << 5)
110 #define VC_MMERR                (1 << 4)
111 #define VC_CORERESET    (1 << 0)
112
113 #define NVIC_ICTR               0xE000E004
114 #define NVIC_ISE0               0xE000E100
115 #define NVIC_ICSR               0xE000ED04
116 #define NVIC_AIRCR              0xE000ED0C
117 #define NVIC_SHCSR              0xE000ED24
118 #define NVIC_CFSR               0xE000ED28
119 #define NVIC_MMFSRb             0xE000ED28
120 #define NVIC_BFSRb              0xE000ED29
121 #define NVIC_USFSRh             0xE000ED2A
122 #define NVIC_HFSR               0xE000ED2C
123 #define NVIC_DFSR               0xE000ED30
124 #define NVIC_MMFAR              0xE000ED34
125 #define NVIC_BFAR               0xE000ED38
126
127 /* NVIC_AIRCR bits */
128 #define AIRCR_VECTKEY           (0x5FA << 16)
129 #define AIRCR_SYSRESETREQ       (1 << 2)
130 #define AIRCR_VECTCLRACTIVE     (1 << 1)
131 #define AIRCR_VECTRESET         (1 << 0)
132 /* NVIC_SHCSR bits */
133 #define SHCSR_BUSFAULTENA       (1 << 17)
134 /* NVIC_DFSR bits */
135 #define DFSR_HALTED                     1
136 #define DFSR_BKPT                       2
137 #define DFSR_DWTTRAP            4
138 #define DFSR_VCATCH                     8
139 #define DFSR_EXTERNAL           16
140
141 #define FPCR_CODE 0
142 #define FPCR_LITERAL 1
143 #define FPCR_REPLACE_REMAP  (0 << 30)
144 #define FPCR_REPLACE_BKPT_LOW  (1 << 30)
145 #define FPCR_REPLACE_BKPT_HIGH  (2 << 30)
146 #define FPCR_REPLACE_BKPT_BOTH  (3 << 30)
147
148 struct cortex_m_fp_comparator {
149         bool used;
150         int type;
151         uint32_t fpcr_value;
152         uint32_t fpcr_address;
153 };
154
155 struct cortex_m_dwt_comparator {
156         bool used;
157         uint32_t comp;
158         uint32_t mask;
159         uint32_t function;
160         uint32_t dwt_comparator_address;
161 };
162
163 enum cortex_m_soft_reset_config {
164         CORTEX_M_RESET_SYSRESETREQ,
165         CORTEX_M_RESET_VECTRESET,
166 };
167
168 enum cortex_m_isrmasking_mode {
169         CORTEX_M_ISRMASK_AUTO,
170         CORTEX_M_ISRMASK_OFF,
171         CORTEX_M_ISRMASK_ON,
172         CORTEX_M_ISRMASK_STEPONLY,
173 };
174
175 struct cortex_m_common {
176         int common_magic;
177
178         /* Context information */
179         uint32_t dcb_dhcsr;
180         uint32_t nvic_dfsr;  /* Debug Fault Status Register - shows reason for debug halt */
181         uint32_t nvic_icsr;  /* Interrupt Control State Register - shows active and pending IRQ */
182
183         /* Flash Patch and Breakpoint (FPB) */
184         int fp_num_lit;
185         int fp_num_code;
186         int fp_rev;
187         bool fpb_enabled;
188         struct cortex_m_fp_comparator *fp_comparator_list;
189
190         /* Data Watchpoint and Trace (DWT) */
191         int dwt_num_comp;
192         int dwt_comp_available;
193         uint32_t dwt_devarch;
194         struct cortex_m_dwt_comparator *dwt_comparator_list;
195         struct reg_cache *dwt_cache;
196
197         enum cortex_m_soft_reset_config soft_reset_config;
198         bool vectreset_supported;
199
200         enum cortex_m_isrmasking_mode isrmasking_mode;
201
202         struct armv7m_common armv7m;
203
204         int apsel;
205
206         /* Whether this target has the erratum that makes C_MASKINTS not apply to
207          * already pending interrupts */
208         bool maskints_erratum;
209 };
210
211 static inline struct cortex_m_common *
212 target_to_cm(struct target *target)
213 {
214         return container_of(target->arch_info,
215                         struct cortex_m_common, armv7m);
216 }
217
218 int cortex_m_examine(struct target *target);
219 int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint);
220 int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoint);
221 int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint);
222 int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpoint);
223 int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint);
224 int cortex_m_unset_watchpoint(struct target *target, struct watchpoint *watchpoint);
225 int cortex_m_add_watchpoint(struct target *target, struct watchpoint *watchpoint);
226 int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpoint);
227 void cortex_m_enable_breakpoints(struct target *target);
228 void cortex_m_enable_watchpoints(struct target *target);
229 void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target);
230 void cortex_m_deinit_target(struct target *target);
231 int cortex_m_profiling(struct target *target, uint32_t *samples,
232         uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
233
234 #endif /* OPENOCD_TARGET_CORTEX_M_H */