cortex_m: set the debug reason to DBGRQ when NVIC_DFSR indicates EXTERNAL
[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  *                                                                         *
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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 /* Debug Control Block */
42 #define DCB_DHCSR       0xE000EDF0
43 #define DCB_DCRSR       0xE000EDF4
44 #define DCB_DCRDR       0xE000EDF8
45 #define DCB_DEMCR       0xE000EDFC
46
47 #define DCRSR_WnR       (1 << 16)
48
49 #define DWT_CTRL        0xE0001000
50 #define DWT_CYCCNT      0xE0001004
51 #define DWT_PCSR        0xE000101C
52 #define DWT_COMP0       0xE0001020
53 #define DWT_MASK0       0xE0001024
54 #define DWT_FUNCTION0   0xE0001028
55
56 #define FP_CTRL         0xE0002000
57 #define FP_REMAP        0xE0002004
58 #define FP_COMP0        0xE0002008
59 #define FP_COMP1        0xE000200C
60 #define FP_COMP2        0xE0002010
61 #define FP_COMP3        0xE0002014
62 #define FP_COMP4        0xE0002018
63 #define FP_COMP5        0xE000201C
64 #define FP_COMP6        0xE0002020
65 #define FP_COMP7        0xE0002024
66
67 #define FPU_CPACR       0xE000ED88
68 #define FPU_FPCCR       0xE000EF34
69 #define FPU_FPCAR       0xE000EF38
70 #define FPU_FPDSCR      0xE000EF3C
71
72 #define TPIU_SSPSR      0xE0040000
73 #define TPIU_CSPSR      0xE0040004
74 #define TPIU_ACPR       0xE0040010
75 #define TPIU_SPPR       0xE00400F0
76 #define TPIU_FFSR       0xE0040300
77 #define TPIU_FFCR       0xE0040304
78 #define TPIU_FSCR       0xE0040308
79
80 /* DCB_DHCSR bit and field definitions */
81 #define DBGKEY          (0xA05F << 16)
82 #define C_DEBUGEN       (1 << 0)
83 #define C_HALT          (1 << 1)
84 #define C_STEP          (1 << 2)
85 #define C_MASKINTS      (1 << 3)
86 #define S_REGRDY        (1 << 16)
87 #define S_HALT          (1 << 17)
88 #define S_SLEEP         (1 << 18)
89 #define S_LOCKUP        (1 << 19)
90 #define S_RETIRE_ST     (1 << 24)
91 #define S_RESET_ST      (1 << 25)
92
93 /* DCB_DEMCR bit and field definitions */
94 #define TRCENA                  (1 << 24)
95 #define VC_HARDERR              (1 << 10)
96 #define VC_INTERR               (1 << 9)
97 #define VC_BUSERR               (1 << 8)
98 #define VC_STATERR              (1 << 7)
99 #define VC_CHKERR               (1 << 6)
100 #define VC_NOCPERR              (1 << 5)
101 #define VC_MMERR                (1 << 4)
102 #define VC_CORERESET    (1 << 0)
103
104 #define NVIC_ICTR               0xE000E004
105 #define NVIC_ISE0               0xE000E100
106 #define NVIC_ICSR               0xE000ED04
107 #define NVIC_AIRCR              0xE000ED0C
108 #define NVIC_SHCSR              0xE000ED24
109 #define NVIC_CFSR               0xE000ED28
110 #define NVIC_MMFSRb             0xE000ED28
111 #define NVIC_BFSRb              0xE000ED29
112 #define NVIC_USFSRh             0xE000ED2A
113 #define NVIC_HFSR               0xE000ED2C
114 #define NVIC_DFSR               0xE000ED30
115 #define NVIC_MMFAR              0xE000ED34
116 #define NVIC_BFAR               0xE000ED38
117
118 /* NVIC_AIRCR bits */
119 #define AIRCR_VECTKEY           (0x5FA << 16)
120 #define AIRCR_SYSRESETREQ       (1 << 2)
121 #define AIRCR_VECTCLRACTIVE     (1 << 1)
122 #define AIRCR_VECTRESET         (1 << 0)
123 /* NVIC_SHCSR bits */
124 #define SHCSR_BUSFAULTENA       (1 << 17)
125 /* NVIC_DFSR bits */
126 #define DFSR_HALTED                     1
127 #define DFSR_BKPT                       2
128 #define DFSR_DWTTRAP            4
129 #define DFSR_VCATCH                     8
130 #define DFSR_EXTERNAL           16
131
132 #define FPCR_CODE 0
133 #define FPCR_LITERAL 1
134 #define FPCR_REPLACE_REMAP  (0 << 30)
135 #define FPCR_REPLACE_BKPT_LOW  (1 << 30)
136 #define FPCR_REPLACE_BKPT_HIGH  (2 << 30)
137 #define FPCR_REPLACE_BKPT_BOTH  (3 << 30)
138
139 struct cortex_m_fp_comparator {
140         bool used;
141         int type;
142         uint32_t fpcr_value;
143         uint32_t fpcr_address;
144 };
145
146 struct cortex_m_dwt_comparator {
147         bool used;
148         uint32_t comp;
149         uint32_t mask;
150         uint32_t function;
151         uint32_t dwt_comparator_address;
152 };
153
154 enum cortex_m_soft_reset_config {
155         CORTEX_M_RESET_SYSRESETREQ,
156         CORTEX_M_RESET_VECTRESET,
157 };
158
159 enum cortex_m_isrmasking_mode {
160         CORTEX_M_ISRMASK_AUTO,
161         CORTEX_M_ISRMASK_OFF,
162         CORTEX_M_ISRMASK_ON,
163         CORTEX_M_ISRMASK_STEPONLY,
164 };
165
166 struct cortex_m_common {
167         int common_magic;
168
169         /* Context information */
170         uint32_t dcb_dhcsr;
171         uint32_t nvic_dfsr;  /* Debug Fault Status Register - shows reason for debug halt */
172         uint32_t nvic_icsr;  /* Interrupt Control State Register - shows active and pending IRQ */
173
174         /* Flash Patch and Breakpoint (FPB) */
175         int fp_num_lit;
176         int fp_num_code;
177         int fp_rev;
178         bool fpb_enabled;
179         struct cortex_m_fp_comparator *fp_comparator_list;
180
181         /* Data Watchpoint and Trace (DWT) */
182         int dwt_num_comp;
183         int dwt_comp_available;
184         struct cortex_m_dwt_comparator *dwt_comparator_list;
185         struct reg_cache *dwt_cache;
186
187         enum cortex_m_soft_reset_config soft_reset_config;
188         bool vectreset_supported;
189
190         enum cortex_m_isrmasking_mode isrmasking_mode;
191
192         struct armv7m_common armv7m;
193
194         int apsel;
195
196         /* Whether this target has the erratum that makes C_MASKINTS not apply to
197          * already pending interrupts */
198         bool maskints_erratum;
199 };
200
201 static inline struct cortex_m_common *
202 target_to_cm(struct target *target)
203 {
204         return container_of(target->arch_info,
205                         struct cortex_m_common, armv7m);
206 }
207
208 int cortex_m_examine(struct target *target);
209 int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint);
210 int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoint);
211 int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint);
212 int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpoint);
213 int cortex_m_set_watchpoint(struct target *target, struct watchpoint *watchpoint);
214 int cortex_m_unset_watchpoint(struct target *target, struct watchpoint *watchpoint);
215 int cortex_m_add_watchpoint(struct target *target, struct watchpoint *watchpoint);
216 int cortex_m_remove_watchpoint(struct target *target, struct watchpoint *watchpoint);
217 void cortex_m_enable_breakpoints(struct target *target);
218 void cortex_m_enable_watchpoints(struct target *target);
219 void cortex_m_dwt_setup(struct cortex_m_common *cm, struct target *target);
220 void cortex_m_deinit_target(struct target *target);
221 int cortex_m_profiling(struct target *target, uint32_t *samples,
222         uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
223
224 #endif /* OPENOCD_TARGET_CORTEX_M_H */