diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/target/cortex_a.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/target/cortex_a.c b/src/target/cortex_a.c index 3da58701..c1293e20 100644 --- a/src/target/cortex_a.c +++ b/src/target/cortex_a.c @@ -2753,6 +2753,74 @@ static int cortex_a_write_memory(struct target *target, uint32_t address, return retval; } +static int cortex_a_read_buffer(struct target *target, uint32_t address, + uint32_t count, uint8_t *buffer) +{ + uint32_t size; + + /* Align up to maximum 4 bytes. The loop condition makes sure the next pass + * will have something to do with the size we leave to it. */ + for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) { + if (address & size) { + int retval = target_read_memory(target, address, size, 1, buffer); + if (retval != ERROR_OK) + return retval; + address += size; + count -= size; + buffer += size; + } + } + + /* Read the data with as large access size as possible. */ + for (; size > 0; size /= 2) { + uint32_t aligned = count - count % size; + if (aligned > 0) { + int retval = target_read_memory(target, address, size, aligned / size, buffer); + if (retval != ERROR_OK) + return retval; + address += aligned; + count -= aligned; + buffer += aligned; + } + } + + return ERROR_OK; +} + +static int cortex_a_write_buffer(struct target *target, uint32_t address, + uint32_t count, const uint8_t *buffer) +{ + uint32_t size; + + /* Align up to maximum 4 bytes. The loop condition makes sure the next pass + * will have something to do with the size we leave to it. */ + for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) { + if (address & size) { + int retval = target_write_memory(target, address, size, 1, buffer); + if (retval != ERROR_OK) + return retval; + address += size; + count -= size; + buffer += size; + } + } + + /* Write the data with as large access size as possible. */ + for (; size > 0; size /= 2) { + uint32_t aligned = count - count % size; + if (aligned > 0) { + int retval = target_write_memory(target, address, size, aligned / size, buffer); + if (retval != ERROR_OK) + return retval; + address += aligned; + count -= aligned; + buffer += aligned; + } + } + + return ERROR_OK; +} + static int cortex_a_handle_target_request(void *priv) { struct target *target = priv; @@ -3285,6 +3353,9 @@ struct target_type cortexa_target = { .read_memory = cortex_a_read_memory, .write_memory = cortex_a_write_memory, + .read_buffer = cortex_a_read_buffer, + .write_buffer = cortex_a_write_buffer, + .checksum_memory = arm_checksum_memory, .blank_check_memory = arm_blank_check_memory, |