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ARMv7M: use software breakpoints for algorithms

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- armv7m_run_algorithm now requires all algorithms to use
   a software breakpoint at their exit address
 - updated all algorithms to support this

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
This commit is contained in:
Spencer Oliver 2010-02-02 13:22:07 +00:00
parent 0324eb2496
commit a851ce0d6f
5 changed files with 9 additions and 26 deletions
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4
src/flash/nor/at91sam3.c
View File

@ -2046,9 +2046,7 @@ sam3_page_write_opcodes[] = {
0x10,0xf0,0x01,0x0f,
// 41 0024 FBD0 beq .L4
0xfb,0xd0,
// 42 .done:
// 43 0026 FEE7 b .done
0xfe,0xe7
0x00,0xBE /* bkpt #0 */
};

2
src/flash/nor/lpc2000.c
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@ -267,7 +267,7 @@ static int lpc2000_iap_call(struct flash_bank *bank, int code, uint32_t param_ta
target_buffer_set_u32(target, jump_gate,
ARMV4_5_T_BX(12));
target_buffer_set_u32(target, jump_gate + 4,
ARMV4_5_T_B(0xfffffe));
ARMV5_T_BKPT(0));
break;
case lpc2000_v1:
case lpc2000_v2:

3
src/flash/nor/stellaris.c
View File

@ -805,8 +805,7 @@ static const uint8_t stellaris_write_code[] =
0x04,0x36, /* adds r6, r6, #4 */
0x96,0x42, /* cmp r6, r2 */
0xF4,0xD1, /* bne mainloop */
/* exit: */
0xFE,0xE7, /* b exit */
0x00,0xBE, /* bkpt #0 */
/* pFLASH_CTRL_BASE: */
0x00,0xD0,0x0F,0x40, /* .word 0x400FD000 */
/* FLASHWRITECMD: */

3
src/flash/nor/stm32x.c
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@ -459,8 +459,7 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer, uint32_t
0x01, 0xD1, /* bne exit */
0x01, 0x3A, /* subs r2, r2, #1 */
0xED, 0xD1, /* bne write */
/* exit: */
0xFE, 0xE7, /* b exit */
0x00, 0xBE, /* bkpt #0 */
0x10, 0x20, 0x02, 0x40, /* STM32_FLASH_CR: .word 0x40022010 */
0x0C, 0x20, 0x02, 0x40 /* STM32_FLASH_SR: .word 0x4002200C */
};

23
src/target/armv7m.c
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@ -338,6 +338,9 @@ int armv7m_run_algorithm(struct target *target,
int retval = ERROR_OK;
uint32_t context[ARMV7M_NUM_REGS];
/* NOTE: armv7m_run_algorithm requires that each algorithm uses a software breakpoint
* at the exit point */
if (armv7m_algorithm_info->common_magic != ARMV7M_COMMON_MAGIC)
{
LOG_ERROR("current target isn't an ARMV7M target");
@ -395,22 +398,8 @@ int armv7m_run_algorithm(struct target *target,
armv7m->core_cache->reg_list[ARMV7M_CONTROL].valid = 1;
}
/* REVISIT speed things up (3% or so in one case) by requiring
* algorithms to include a BKPT instruction at each exit point.
* This eliminates overheads of adding/removing a breakpoint.
*/
/* ARMV7M always runs in Thumb state */
if ((retval = breakpoint_add(target, exit_point, 2, BKPT_SOFT)) != ERROR_OK)
{
LOG_ERROR("can't add breakpoint to finish algorithm execution");
return ERROR_TARGET_FAILURE;
}
retval = armv7m_run_and_wait(target, entry_point, timeout_ms, exit_point, armv7m);
breakpoint_remove(target, exit_point);
if (retval != ERROR_OK)
{
return retval;
@ -594,8 +583,7 @@ int armv7m_checksum_memory(struct target *target,
/* ncomp: */
0x429C, /* cmp r4, r3 */
0xD1E9, /* bne nbyte */
/* end: */
0xE7FE, /* b end */
0xBE00, /* bkpt #0 */
0x1DB7, 0x04C1 /* CRC32XOR: .word 0x04C11DB7 */
};
@ -659,8 +647,7 @@ int armv7m_blank_check_memory(struct target *target,
0xEA02, 0x0203, /* and r2, r2, r3 */
0x3901, /* subs r1, r1, #1 */
0xD1F9, /* bne loop */
/* end: */
0xE7FE, /* b end */
0xBE00, /* bkpt #0 */
};
/* make sure we have a working area */