- 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 <[email protected]> --- src/flash/nor/at91sam3.c | 4 +--- src/flash/nor/lpc2000.c | 2 +- src/flash/nor/stellaris.c | 3 +-- src/flash/nor/stm32x.c | 3 +-- src/target/armv7m.c | 23 +++++------------------ 5 files changed, 9 insertions(+), 26 deletions(-) seemed crazy to not make use of the armv7m bkpt instruction. tested on stm32 and luminary Cheers Spen
>From 1aaa0e0a2a16340bcda81e9b0a8541d565be66f7 Mon Sep 17 00:00:00 2001 From: Spencer Oliver <[email protected]> Date: Wed, 13 Jan 2010 11:32:12 +0000 Subject: [PATCH] ARMv7: use software breakpoints for algorithms - 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 <[email protected]> --- src/flash/nor/at91sam3.c | 4 +--- src/flash/nor/lpc2000.c | 2 +- src/flash/nor/stellaris.c | 3 +-- src/flash/nor/stm32x.c | 3 +-- src/target/armv7m.c | 23 +++++------------------ 5 files changed, 9 insertions(+), 26 deletions(-) diff --git a/src/flash/nor/at91sam3.c b/src/flash/nor/at91sam3.c index 5dacf6f..699f493 100644 --- a/src/flash/nor/at91sam3.c +++ b/src/flash/nor/at91sam3.c @@ -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 */ }; diff --git a/src/flash/nor/lpc2000.c b/src/flash/nor/lpc2000.c index ae0a384..ac76493 100644 --- a/src/flash/nor/lpc2000.c +++ b/src/flash/nor/lpc2000.c @@ -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: diff --git a/src/flash/nor/stellaris.c b/src/flash/nor/stellaris.c index 8d35f9b..8083f60 100644 --- a/src/flash/nor/stellaris.c +++ b/src/flash/nor/stellaris.c @@ -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: */ diff --git a/src/flash/nor/stm32x.c b/src/flash/nor/stm32x.c index 75dcf3b..d45df9c 100644 --- a/src/flash/nor/stm32x.c +++ b/src/flash/nor/stm32x.c @@ -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 */ }; diff --git a/src/target/armv7m.c b/src/target/armv7m.c index 233fb95..3972df5 100644 --- a/src/target/armv7m.c +++ b/src/target/armv7m.c @@ -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; @@ -582,8 +571,7 @@ 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 */ }; @@ -647,8 +635,7 @@ 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 */ -- 1.6.5.1.1367.gcd48
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