1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2006 by Magnus Lundin *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2007,2008 Øyvind Harboe *
12 * oyvind.harboe@zylin.com *
14 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program; if not, write to the *
26 * Free Software Foundation, Inc., *
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
29 * ARMv7-M Architecture, Application Level Reference Manual *
30 * ARM DDI 0405C (September 2008) *
32 ***************************************************************************/
37 #include "breakpoints.h"
40 #include "algorithm.h"
45 #define _DEBUG_INSTRUCTION_EXECUTION_
48 /** Maps from enum armv7m_mode (except ARMV7M_MODE_ANY) to name. */
49 char *armv7m_mode_strings
[] =
51 "Thread", "Thread (User)", "Handler",
54 static char *armv7m_exception_strings
[] =
56 "", "Reset", "NMI", "HardFault",
57 "MemManage", "BusFault", "UsageFault", "RESERVED",
58 "RESERVED", "RESERVED", "RESERVED", "SVCall",
59 "DebugMonitor", "RESERVED", "PendSV", "SysTick"
62 /* FIXME these dummies are IDENTICAL to the armv4_5, arm11, and armv7a
63 * ones... except for naming/scoping
65 static uint8_t armv7m_gdb_dummy_fp_value
[12];
67 static struct reg armv7m_gdb_dummy_fp_reg
=
69 .name
= "GDB dummy floating-point register",
70 .value
= armv7m_gdb_dummy_fp_value
,
78 static uint8_t armv7m_gdb_dummy_fps_value
[4];
80 static struct reg armv7m_gdb_dummy_fps_reg
=
82 .name
= "GDB dummy floating-point status register",
83 .value
= armv7m_gdb_dummy_fps_value
,
91 #ifdef ARMV7_GDB_HACKS
92 uint8_t armv7m_gdb_dummy_cpsr_value
[] = {0, 0, 0, 0};
94 struct reg armv7m_gdb_dummy_cpsr_reg
=
96 .name
= "GDB dummy cpsr register",
97 .value
= armv7m_gdb_dummy_cpsr_value
,
107 * These registers are not memory-mapped. The ARMv7-M profile includes
108 * memory mapped registers too, such as for the NVIC (interrupt controller)
109 * and SysTick (timer) modules; those can mostly be treated as peripherals.
111 * The ARMv6-M profile is almost identical in this respect, except that it
112 * doesn't include basepri or faultmask registers.
114 static const struct {
119 { ARMV7M_R0
, "r0", 32 },
120 { ARMV7M_R1
, "r1", 32 },
121 { ARMV7M_R2
, "r2", 32 },
122 { ARMV7M_R3
, "r3", 32 },
124 { ARMV7M_R4
, "r4", 32 },
125 { ARMV7M_R5
, "r5", 32 },
126 { ARMV7M_R6
, "r6", 32 },
127 { ARMV7M_R7
, "r7", 32 },
129 { ARMV7M_R8
, "r8", 32 },
130 { ARMV7M_R9
, "r9", 32 },
131 { ARMV7M_R10
, "r10", 32 },
132 { ARMV7M_R11
, "r11", 32 },
134 { ARMV7M_R12
, "r12", 32 },
135 { ARMV7M_R13
, "sp", 32 },
136 { ARMV7M_R14
, "lr", 32 },
137 { ARMV7M_PC
, "pc", 32 },
139 { ARMV7M_xPSR
, "xPSR", 32 },
140 { ARMV7M_MSP
, "msp", 32 },
141 { ARMV7M_PSP
, "psp", 32 },
143 { ARMV7M_PRIMASK
, "primask", 1 },
144 { ARMV7M_BASEPRI
, "basepri", 8 },
145 { ARMV7M_FAULTMASK
, "faultmask", 1 },
146 { ARMV7M_CONTROL
, "control", 2 },
149 #define ARMV7M_NUM_REGS ARRAY_SIZE(armv7m_regs)
151 static int armv7m_core_reg_arch_type
= -1;
154 * Restores target context using the cache of core registers set up
155 * by armv7m_build_reg_cache(), calling optional core-specific hooks.
157 int armv7m_restore_context(struct target
*target
)
160 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
164 if (armv7m
->pre_restore_context
)
165 armv7m
->pre_restore_context(target
);
167 for (i
= ARMV7M_NUM_REGS
- 1; i
>= 0; i
--)
169 if (armv7m
->core_cache
->reg_list
[i
].dirty
)
171 armv7m
->write_core_reg(target
, i
);
175 if (armv7m
->post_restore_context
)
176 armv7m
->post_restore_context(target
);
181 /* Core state functions */
184 * Maps ISR number (from xPSR) to name.
185 * Note that while names and meanings for the first sixteen are standardized
186 * (with zero not a true exception), external interrupts are only numbered.
187 * They are assigned by vendors, which generally assign different numbers to
188 * peripherals (such as UART0 or a USB peripheral controller).
190 char *armv7m_exception_string(int number
)
192 static char enamebuf
[32];
194 if ((number
< 0) | (number
> 511))
195 return "Invalid exception";
197 return armv7m_exception_strings
[number
];
198 sprintf(enamebuf
, "External Interrupt(%i)", number
- 16);
202 static int armv7m_get_core_reg(struct reg
*reg
)
205 struct armv7m_core_reg
*armv7m_reg
= reg
->arch_info
;
206 struct target
*target
= armv7m_reg
->target
;
207 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
209 if (target
->state
!= TARGET_HALTED
)
211 return ERROR_TARGET_NOT_HALTED
;
214 retval
= armv7m
->read_core_reg(target
, armv7m_reg
->num
);
219 static int armv7m_set_core_reg(struct reg
*reg
, uint8_t *buf
)
221 struct armv7m_core_reg
*armv7m_reg
= reg
->arch_info
;
222 struct target
*target
= armv7m_reg
->target
;
223 uint32_t value
= buf_get_u32(buf
, 0, 32);
225 if (target
->state
!= TARGET_HALTED
)
227 return ERROR_TARGET_NOT_HALTED
;
230 buf_set_u32(reg
->value
, 0, 32, value
);
237 static int armv7m_read_core_reg(struct target
*target
, unsigned num
)
241 struct armv7m_core_reg
* armv7m_core_reg
;
242 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
244 if (num
>= ARMV7M_NUM_REGS
)
245 return ERROR_INVALID_ARGUMENTS
;
247 armv7m_core_reg
= armv7m
->core_cache
->reg_list
[num
].arch_info
;
248 retval
= armv7m
->load_core_reg_u32(target
, armv7m_core_reg
->type
, armv7m_core_reg
->num
, ®_value
);
249 buf_set_u32(armv7m
->core_cache
->reg_list
[num
].value
, 0, 32, reg_value
);
250 armv7m
->core_cache
->reg_list
[num
].valid
= 1;
251 armv7m
->core_cache
->reg_list
[num
].dirty
= 0;
256 static int armv7m_write_core_reg(struct target
*target
, unsigned num
)
260 struct armv7m_core_reg
*armv7m_core_reg
;
261 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
263 if (num
>= ARMV7M_NUM_REGS
)
264 return ERROR_INVALID_ARGUMENTS
;
266 reg_value
= buf_get_u32(armv7m
->core_cache
->reg_list
[num
].value
, 0, 32);
267 armv7m_core_reg
= armv7m
->core_cache
->reg_list
[num
].arch_info
;
268 retval
= armv7m
->store_core_reg_u32(target
, armv7m_core_reg
->type
, armv7m_core_reg
->num
, reg_value
);
269 if (retval
!= ERROR_OK
)
271 LOG_ERROR("JTAG failure");
272 armv7m
->core_cache
->reg_list
[num
].dirty
= armv7m
->core_cache
->reg_list
[num
].valid
;
273 return ERROR_JTAG_DEVICE_ERROR
;
275 LOG_DEBUG("write core reg %i value 0x%" PRIx32
"", num
, reg_value
);
276 armv7m
->core_cache
->reg_list
[num
].valid
= 1;
277 armv7m
->core_cache
->reg_list
[num
].dirty
= 0;
282 /** Invalidates cache of core registers set up by armv7m_build_reg_cache(). */
283 int armv7m_invalidate_core_regs(struct target
*target
)
285 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
288 for (i
= 0; i
< armv7m
->core_cache
->num_regs
; i
++)
290 armv7m
->core_cache
->reg_list
[i
].valid
= 0;
291 armv7m
->core_cache
->reg_list
[i
].dirty
= 0;
298 * Returns generic ARM userspace registers to GDB.
299 * GDB doesn't quite understand that most ARMs don't have floating point
300 * hardware, so this also fakes a set of long-obsolete FPA registers that
301 * are not used in EABI based software stacks.
303 int armv7m_get_gdb_reg_list(struct target
*target
, struct reg
**reg_list
[], int *reg_list_size
)
305 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
309 *reg_list
= malloc(sizeof(struct reg
*) * (*reg_list_size
));
312 * GDB register packet format for ARM:
313 * - the first 16 registers are r0..r15
314 * - (obsolete) 8 FPA registers
315 * - (obsolete) FPA status
318 for (i
= 0; i
< 16; i
++)
320 (*reg_list
)[i
] = &armv7m
->core_cache
->reg_list
[i
];
323 for (i
= 16; i
< 24; i
++)
325 (*reg_list
)[i
] = &armv7m_gdb_dummy_fp_reg
;
328 (*reg_list
)[24] = &armv7m_gdb_dummy_fps_reg
;
330 #ifdef ARMV7_GDB_HACKS
331 /* use dummy cpsr reg otherwise gdb may try and set the thumb bit */
332 (*reg_list
)[25] = &armv7m_gdb_dummy_cpsr_reg
;
334 /* ARMV7M is always in thumb mode, try to make GDB understand this
335 * if it does not support this arch */
336 *((char*)armv7m
->core_cache
->reg_list
[15].value
) |= 1;
338 (*reg_list
)[25] = &armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
];
344 /* run to exit point. return error if exit point was not reached. */
345 static int armv7m_run_and_wait(struct target
*target
, uint32_t entry_point
, int timeout_ms
, uint32_t exit_point
, struct armv7m_common
*armv7m
)
349 /* This code relies on the target specific resume() and poll()->debug_entry()
350 * sequence to write register values to the processor and the read them back */
351 if ((retval
= target_resume(target
, 0, entry_point
, 1, 1)) != ERROR_OK
)
356 retval
= target_wait_state(target
, TARGET_HALTED
, timeout_ms
);
357 /* If the target fails to halt due to the breakpoint, force a halt */
358 if (retval
!= ERROR_OK
|| target
->state
!= TARGET_HALTED
)
360 if ((retval
= target_halt(target
)) != ERROR_OK
)
362 if ((retval
= target_wait_state(target
, TARGET_HALTED
, 500)) != ERROR_OK
)
366 return ERROR_TARGET_TIMEOUT
;
369 armv7m
->load_core_reg_u32(target
, ARMV7M_REGISTER_CORE_GP
, 15, &pc
);
370 if (pc
!= exit_point
)
372 LOG_DEBUG("failed algoritm halted at 0x%" PRIx32
" ", pc
);
373 return ERROR_TARGET_TIMEOUT
;
379 /** Runs a Thumb algorithm in the target. */
380 int armv7m_run_algorithm(struct target
*target
,
381 int num_mem_params
, struct mem_param
*mem_params
,
382 int num_reg_params
, struct reg_param
*reg_params
,
383 uint32_t entry_point
, uint32_t exit_point
,
384 int timeout_ms
, void *arch_info
)
386 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
387 struct armv7m_algorithm
*armv7m_algorithm_info
= arch_info
;
388 enum armv7m_mode core_mode
= armv7m
->core_mode
;
389 int retval
= ERROR_OK
;
390 uint32_t context
[ARMV7M_NUM_REGS
];
392 if (armv7m_algorithm_info
->common_magic
!= ARMV7M_COMMON_MAGIC
)
394 LOG_ERROR("current target isn't an ARMV7M target");
395 return ERROR_TARGET_INVALID
;
398 if (target
->state
!= TARGET_HALTED
)
400 LOG_WARNING("target not halted");
401 return ERROR_TARGET_NOT_HALTED
;
404 /* refresh core register cache */
405 /* Not needed if core register cache is always consistent with target process state */
406 for (unsigned i
= 0; i
< ARMV7M_NUM_REGS
; i
++)
408 if (!armv7m
->core_cache
->reg_list
[i
].valid
)
409 armv7m
->read_core_reg(target
, i
);
410 context
[i
] = buf_get_u32(armv7m
->core_cache
->reg_list
[i
].value
, 0, 32);
413 for (int i
= 0; i
< num_mem_params
; i
++)
415 if ((retval
= target_write_buffer(target
, mem_params
[i
].address
, mem_params
[i
].size
, mem_params
[i
].value
)) != ERROR_OK
)
419 for (int i
= 0; i
< num_reg_params
; i
++)
421 struct reg
*reg
= register_get_by_name(armv7m
->core_cache
, reg_params
[i
].reg_name
, 0);
422 // uint32_t regvalue;
426 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
430 if (reg
->size
!= reg_params
[i
].size
)
432 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params
[i
].reg_name
);
436 // regvalue = buf_get_u32(reg_params[i].value, 0, 32);
437 armv7m_set_core_reg(reg
, reg_params
[i
].value
);
440 if (armv7m_algorithm_info
->core_mode
!= ARMV7M_MODE_ANY
)
442 LOG_DEBUG("setting core_mode: 0x%2.2x", armv7m_algorithm_info
->core_mode
);
443 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].value
,
444 0, 1, armv7m_algorithm_info
->core_mode
);
445 armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].dirty
= 1;
446 armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].valid
= 1;
449 /* REVISIT speed things up (3% or so in one case) by requiring
450 * algorithms to include a BKPT instruction at each exit point.
451 * This eliminates overheads of adding/removing a breakpoint.
454 /* ARMV7M always runs in Thumb state */
455 if ((retval
= breakpoint_add(target
, exit_point
, 2, BKPT_SOFT
)) != ERROR_OK
)
457 LOG_ERROR("can't add breakpoint to finish algorithm execution");
458 return ERROR_TARGET_FAILURE
;
461 retval
= armv7m_run_and_wait(target
, entry_point
, timeout_ms
, exit_point
, armv7m
);
463 breakpoint_remove(target
, exit_point
);
465 if (retval
!= ERROR_OK
)
470 /* Read memory values to mem_params[] */
471 for (int i
= 0; i
< num_mem_params
; i
++)
473 if (mem_params
[i
].direction
!= PARAM_OUT
)
474 if ((retval
= target_read_buffer(target
, mem_params
[i
].address
, mem_params
[i
].size
, mem_params
[i
].value
)) != ERROR_OK
)
480 /* Copy core register values to reg_params[] */
481 for (int i
= 0; i
< num_reg_params
; i
++)
483 if (reg_params
[i
].direction
!= PARAM_OUT
)
485 struct reg
*reg
= register_get_by_name(armv7m
->core_cache
, reg_params
[i
].reg_name
, 0);
489 LOG_ERROR("BUG: register '%s' not found", reg_params
[i
].reg_name
);
493 if (reg
->size
!= reg_params
[i
].size
)
495 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params
[i
].reg_name
);
499 buf_set_u32(reg_params
[i
].value
, 0, 32, buf_get_u32(reg
->value
, 0, 32));
503 for (int i
= ARMV7M_NUM_REGS
- 1; i
>= 0; i
--)
506 regvalue
= buf_get_u32(armv7m
->core_cache
->reg_list
[i
].value
, 0, 32);
507 if (regvalue
!= context
[i
])
509 LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32
,
510 armv7m
->core_cache
->reg_list
[i
].name
, context
[i
]);
511 buf_set_u32(armv7m
->core_cache
->reg_list
[i
].value
,
513 armv7m
->core_cache
->reg_list
[i
].valid
= 1;
514 armv7m
->core_cache
->reg_list
[i
].dirty
= 1;
518 armv7m
->core_mode
= core_mode
;
523 /** Logs summary of ARMv7-M state for a halted target. */
524 int armv7m_arch_state(struct target
*target
)
526 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
529 ctrl
= buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_CONTROL
].value
, 0, 32);
530 sp
= buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_R13
].value
, 0, 32);
532 LOG_USER("target halted due to %s, current mode: %s %s\n"
533 "xPSR: %#8.8" PRIx32
" pc: %#8.8" PRIx32
" %csp: %#8.8" PRIx32
,
534 Jim_Nvp_value2name_simple(nvp_target_debug_reason
,
535 target
->debug_reason
)->name
,
536 armv7m_mode_strings
[armv7m
->core_mode
],
537 armv7m_exception_string(armv7m
->exception_number
),
538 buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32),
539 buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_PC
].value
, 0, 32),
540 (ctrl
& 0x02) ? 'p' : 'm',
546 /** Builds cache of architecturally defined registers. */
547 struct reg_cache
*armv7m_build_reg_cache(struct target
*target
)
549 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
550 int num_regs
= ARMV7M_NUM_REGS
;
551 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
552 struct reg_cache
*cache
= malloc(sizeof(struct reg_cache
));
553 struct reg
*reg_list
= calloc(num_regs
, sizeof(struct reg
));
554 struct armv7m_core_reg
*arch_info
= calloc(num_regs
, sizeof(struct armv7m_core_reg
));
557 if (armv7m_core_reg_arch_type
== -1)
559 armv7m_core_reg_arch_type
= register_reg_arch_type(armv7m_get_core_reg
, armv7m_set_core_reg
);
562 register_init_dummy(&armv7m_gdb_dummy_fps_reg
);
563 #ifdef ARMV7_GDB_HACKS
564 register_init_dummy(&armv7m_gdb_dummy_cpsr_reg
);
566 register_init_dummy(&armv7m_gdb_dummy_fp_reg
);
568 /* Build the process context cache */
569 cache
->name
= "arm v7m registers";
571 cache
->reg_list
= reg_list
;
572 cache
->num_regs
= num_regs
;
574 armv7m
->core_cache
= cache
;
576 for (i
= 0; i
< num_regs
; i
++)
578 arch_info
[i
].num
= armv7m_regs
[i
].id
;
579 arch_info
[i
].target
= target
;
580 arch_info
[i
].armv7m_common
= armv7m
;
581 reg_list
[i
].name
= armv7m_regs
[i
].name
;
582 reg_list
[i
].size
= armv7m_regs
[i
].bits
;
583 reg_list
[i
].value
= calloc(1, 4);
584 reg_list
[i
].dirty
= 0;
585 reg_list
[i
].valid
= 0;
586 reg_list
[i
].arch_type
= armv7m_core_reg_arch_type
;
587 reg_list
[i
].arch_info
= &arch_info
[i
];
593 /** Sets up target as a generic ARMv7-M core */
594 int armv7m_init_arch_info(struct target
*target
, struct armv7m_common
*armv7m
)
596 /* register arch-specific functions */
598 target
->arch_info
= armv7m
;
599 armv7m
->read_core_reg
= armv7m_read_core_reg
;
600 armv7m
->write_core_reg
= armv7m_write_core_reg
;
605 /** Generates a CRC32 checksum of a memory region. */
606 int armv7m_checksum_memory(struct target
*target
,
607 uint32_t address
, uint32_t count
, uint32_t* checksum
)
609 struct working_area
*crc_algorithm
;
610 struct armv7m_algorithm armv7m_info
;
611 struct reg_param reg_params
[2];
614 static const uint16_t cortex_m3_crc_code
[] = {
615 0x4602, /* mov r2, r0 */
616 0xF04F, 0x30FF, /* mov r0, #0xffffffff */
617 0x460B, /* mov r3, r1 */
618 0xF04F, 0x0400, /* mov r4, #0 */
619 0xE013, /* b ncomp */
621 0x5D11, /* ldrb r1, [r2, r4] */
622 0xF8DF, 0x7028, /* ldr r7, CRC32XOR */
623 0xEA80, 0x6001, /* eor r0, r0, r1, asl #24 */
625 0xF04F, 0x0500, /* mov r5, #0 */
627 0x2800, /* cmp r0, #0 */
628 0xEA4F, 0x0640, /* mov r6, r0, asl #1 */
629 0xF105, 0x0501, /* add r5, r5, #1 */
630 0x4630, /* mov r0, r6 */
632 0xEA86, 0x0007, /* eor r0, r6, r7 */
633 0x2D08, /* cmp r5, #8 */
634 0xD1F4, /* bne loop */
636 0xF104, 0x0401, /* add r4, r4, #1 */
638 0x429C, /* cmp r4, r3 */
639 0xD1E9, /* bne nbyte */
642 0x1DB7, 0x04C1 /* CRC32XOR: .word 0x04C11DB7 */
647 if (target_alloc_working_area(target
, sizeof(cortex_m3_crc_code
), &crc_algorithm
) != ERROR_OK
)
649 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
652 /* convert flash writing code into a buffer in target endianness */
653 for (i
= 0; i
< (sizeof(cortex_m3_crc_code
)/sizeof(uint16_t)); i
++)
654 if ((retval
= target_write_u16(target
, crc_algorithm
->address
+ i
*sizeof(uint16_t), cortex_m3_crc_code
[i
])) != ERROR_OK
)
659 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
660 armv7m_info
.core_mode
= ARMV7M_MODE_ANY
;
662 init_reg_param(®_params
[0], "r0", 32, PARAM_IN_OUT
);
663 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
665 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
666 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
668 if ((retval
= target_run_algorithm(target
, 0, NULL
, 2, reg_params
,
669 crc_algorithm
->address
, crc_algorithm
->address
+ (sizeof(cortex_m3_crc_code
)-6), 20000, &armv7m_info
)) != ERROR_OK
)
671 LOG_ERROR("error executing cortex_m3 crc algorithm");
672 destroy_reg_param(®_params
[0]);
673 destroy_reg_param(®_params
[1]);
674 target_free_working_area(target
, crc_algorithm
);
678 *checksum
= buf_get_u32(reg_params
[0].value
, 0, 32);
680 destroy_reg_param(®_params
[0]);
681 destroy_reg_param(®_params
[1]);
683 target_free_working_area(target
, crc_algorithm
);
688 /** Checks whether a memory region is zeroed. */
689 int armv7m_blank_check_memory(struct target
*target
,
690 uint32_t address
, uint32_t count
, uint32_t* blank
)
692 struct working_area
*erase_check_algorithm
;
693 struct reg_param reg_params
[3];
694 struct armv7m_algorithm armv7m_info
;
698 static const uint16_t erase_check_code
[] =
701 0xF810, 0x3B01, /* ldrb r3, [r0], #1 */
702 0xEA02, 0x0203, /* and r2, r2, r3 */
703 0x3901, /* subs r1, r1, #1 */
704 0xD1F9, /* bne loop */
709 /* make sure we have a working area */
710 if (target_alloc_working_area(target
, sizeof(erase_check_code
), &erase_check_algorithm
) != ERROR_OK
)
712 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
715 /* convert flash writing code into a buffer in target endianness */
716 for (i
= 0; i
< (sizeof(erase_check_code
)/sizeof(uint16_t)); i
++)
717 target_write_u16(target
, erase_check_algorithm
->address
+ i
*sizeof(uint16_t), erase_check_code
[i
]);
719 armv7m_info
.common_magic
= ARMV7M_COMMON_MAGIC
;
720 armv7m_info
.core_mode
= ARMV7M_MODE_ANY
;
722 init_reg_param(®_params
[0], "r0", 32, PARAM_OUT
);
723 buf_set_u32(reg_params
[0].value
, 0, 32, address
);
725 init_reg_param(®_params
[1], "r1", 32, PARAM_OUT
);
726 buf_set_u32(reg_params
[1].value
, 0, 32, count
);
728 init_reg_param(®_params
[2], "r2", 32, PARAM_IN_OUT
);
729 buf_set_u32(reg_params
[2].value
, 0, 32, 0xff);
731 if ((retval
= target_run_algorithm(target
, 0, NULL
, 3, reg_params
,
732 erase_check_algorithm
->address
, erase_check_algorithm
->address
+ (sizeof(erase_check_code
)-2), 10000, &armv7m_info
)) != ERROR_OK
)
734 destroy_reg_param(®_params
[0]);
735 destroy_reg_param(®_params
[1]);
736 destroy_reg_param(®_params
[2]);
737 target_free_working_area(target
, erase_check_algorithm
);
741 *blank
= buf_get_u32(reg_params
[2].value
, 0, 32);
743 destroy_reg_param(®_params
[0]);
744 destroy_reg_param(®_params
[1]);
745 destroy_reg_param(®_params
[2]);
747 target_free_working_area(target
, erase_check_algorithm
);
752 /*--------------------------------------------------------------------------*/
755 * Only stuff below this line should need to verify that its target
756 * is an ARMv7-M node.
758 * FIXME yet none of it _does_ verify target types yet!
763 * Return the debug ap baseaddress in hexadecimal;
764 * no extra output to simplify script processing
766 COMMAND_HANDLER(handle_dap_baseaddr_command
)
768 struct target
*target
= get_current_target(cmd_ctx
);
769 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
770 struct swjdp_common
*swjdp
= &armv7m
->swjdp_info
;
771 uint32_t apsel
, apselsave
, baseaddr
;
774 apselsave
= swjdp
->apsel
;
777 apsel
= swjdp
->apsel
;
780 COMMAND_PARSE_NUMBER(u32
, args
[0], apsel
);
783 return ERROR_COMMAND_SYNTAX_ERROR
;
786 if (apselsave
!= apsel
)
787 dap_ap_select(swjdp
, apsel
);
789 dap_ap_read_reg_u32(swjdp
, 0xF8, &baseaddr
);
790 retval
= swjdp_transaction_endcheck(swjdp
);
791 command_print(cmd_ctx
, "0x%8.8" PRIx32
"", baseaddr
);
793 if (apselsave
!= apsel
)
794 dap_ap_select(swjdp
, apselsave
);
800 * Return the debug ap id in hexadecimal;
801 * no extra output to simplify script processing
803 COMMAND_HANDLER(handle_dap_apid_command
)
805 struct target
*target
= get_current_target(cmd_ctx
);
806 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
807 struct swjdp_common
*swjdp
= &armv7m
->swjdp_info
;
809 return CALL_COMMAND_HANDLER(dap_apid_command
, swjdp
);
812 COMMAND_HANDLER(handle_dap_apsel_command
)
814 struct target
*target
= get_current_target(cmd_ctx
);
815 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
816 struct swjdp_common
*swjdp
= &armv7m
->swjdp_info
;
818 return CALL_COMMAND_HANDLER(dap_apsel_command
, swjdp
);
821 COMMAND_HANDLER(handle_dap_memaccess_command
)
823 struct target
*target
= get_current_target(cmd_ctx
);
824 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
825 struct swjdp_common
*swjdp
= &armv7m
->swjdp_info
;
827 return CALL_COMMAND_HANDLER(dap_memaccess_command
, swjdp
);
831 COMMAND_HANDLER(handle_dap_info_command
)
833 struct target
*target
= get_current_target(cmd_ctx
);
834 struct armv7m_common
*armv7m
= target_to_armv7m(target
);
835 struct swjdp_common
*swjdp
= &armv7m
->swjdp_info
;
840 apsel
= swjdp
->apsel
;
843 COMMAND_PARSE_NUMBER(u32
, args
[0], apsel
);
846 return ERROR_COMMAND_SYNTAX_ERROR
;
849 return dap_info_command(cmd_ctx
, swjdp
, apsel
);
852 /** Registers commands used to access DAP resources. */
853 int armv7m_register_commands(struct command_context
*cmd_ctx
)
855 struct command
*arm_adi_v5_dap_cmd
;
857 arm_adi_v5_dap_cmd
= register_command(cmd_ctx
, NULL
, "dap",
859 "cortex dap specific commands");
861 register_command(cmd_ctx
, arm_adi_v5_dap_cmd
, "info",
862 handle_dap_info_command
, COMMAND_EXEC
,
863 "Displays dap info for ap [num],"
864 "default currently selected AP");
865 register_command(cmd_ctx
, arm_adi_v5_dap_cmd
, "apsel",
866 handle_dap_apsel_command
, COMMAND_EXEC
,
867 "Select a different AP [num] (default 0)");
868 register_command(cmd_ctx
, arm_adi_v5_dap_cmd
, "apid",
869 handle_dap_apid_command
, COMMAND_EXEC
,
870 "Displays id reg from AP [num], "
871 "default currently selected AP");
872 register_command(cmd_ctx
, arm_adi_v5_dap_cmd
, "baseaddr",
873 handle_dap_baseaddr_command
, COMMAND_EXEC
,
874 "Displays debug base address from AP [num],"
875 "default currently selected AP");
876 register_command(cmd_ctx
, arm_adi_v5_dap_cmd
, "memaccess",
877 handle_dap_memaccess_command
, COMMAND_EXEC
,
878 "set/get number of extra tck for mem-ap "
879 "memory bus access [0-255]");
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