diff options
| -rw-r--r-- | src/target/armv4_5.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/src/target/armv4_5.c b/src/target/armv4_5.c index 1a84a5f4..d950af36 100644 --- a/src/target/armv4_5.c +++ b/src/target/armv4_5.c @@ -1286,16 +1286,17 @@ int armv4_5_run_algorithm(struct target *target, int num_mem_params, struct mem_ /** * Runs ARM code in the target to calculate a CRC32 checksum. * - * \todo On ARMv5+, rely on BKPT termination for reduced overhead. */ int arm_checksum_memory(struct target *target, uint32_t address, uint32_t count, uint32_t *checksum) { struct working_area *crc_algorithm; struct arm_algorithm armv4_5_info; + struct arm *armv4_5 = target_to_arm(target); struct reg_param reg_params[2]; int retval; uint32_t i; + uint32_t exit_var = 0; static const uint32_t arm_crc_code[] = { 0xE1A02000, /* mov r2, r0 */ @@ -1321,7 +1322,7 @@ int arm_checksum_memory(struct target *target, 0xE1540003, /* cmp r4, r3 */ 0x1AFFFFF1, /* bne nbyte */ /* end: */ - 0xEAFFFFFE, /* b end */ + 0xe1200070, /* bkpt #0 */ /* CRC32XOR: */ 0x04C11DB7 /* .word 0x04C11DB7 */ }; @@ -1353,9 +1354,13 @@ int arm_checksum_memory(struct target *target, /* 20 second timeout/megabyte */ int timeout = 20000 * (1 + (count / (1024 * 1024))); + /* armv4 must exit using a hardware breakpoint */ + if (armv4_5->is_armv4) + exit_var = crc_algorithm->address + sizeof(arm_crc_code) - 8; + retval = target_run_algorithm(target, 0, NULL, 2, reg_params, crc_algorithm->address, - crc_algorithm->address + sizeof(arm_crc_code) - 8, + exit_var, timeout, &armv4_5_info); if (retval != ERROR_OK) { LOG_ERROR("error executing ARM crc algorithm"); @@ -1380,7 +1385,6 @@ int arm_checksum_memory(struct target *target, * all ones. NOR flash which has been erased, and thus may be written, * holds all ones. * - * \todo On ARMv5+, rely on BKPT termination for reduced overhead. */ int arm_blank_check_memory(struct target *target, uint32_t address, uint32_t count, uint32_t *blank) @@ -1388,8 +1392,10 @@ int arm_blank_check_memory(struct target *target, struct working_area *check_algorithm; struct reg_param reg_params[3]; struct arm_algorithm armv4_5_info; + struct arm *armv4_5 = target_to_arm(target); int retval; uint32_t i; + uint32_t exit_var = 0; static const uint32_t check_code[] = { /* loop: */ @@ -1398,7 +1404,7 @@ int arm_blank_check_memory(struct target *target, 0xe2511001, /* subs r1, r1, #1 */ 0x1afffffb, /* bne loop */ /* end: */ - 0xeafffffe /* b end */ + 0xe1200070, /* bkpt #0 */ }; /* make sure we have a working area */ @@ -1430,9 +1436,13 @@ int arm_blank_check_memory(struct target *target, init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT); buf_set_u32(reg_params[2].value, 0, 32, 0xff); + /* armv4 must exit using a hardware breakpoint */ + if (armv4_5->is_armv4) + exit_var = check_algorithm->address + sizeof(check_code) - 4; + retval = target_run_algorithm(target, 0, NULL, 3, reg_params, check_algorithm->address, - check_algorithm->address + sizeof(check_code) - 4, + exit_var, 10000, &armv4_5_info); if (retval != ERROR_OK) { destroy_reg_param(®_params[0]); |