diff options
Diffstat (limited to 'src/target')
| -rw-r--r-- | src/target/image.c | 2 | ||||
| -rw-r--r-- | src/target/riscv/riscv.c | 81 |
2 files changed, 81 insertions, 2 deletions
diff --git a/src/target/image.c b/src/target/image.c index 20c6d77..e63cd0f 100644 --- a/src/target/image.c +++ b/src/target/image.c @@ -1052,7 +1052,7 @@ int image_calculate_checksum(const uint8_t *buffer, uint32_t nbytes, uint32_t *c keep_alive(); } - LOG_DEBUG("Calculating checksum done"); + LOG_DEBUG("Calculating checksum done; checksum=0x%" PRIx32, crc); *checksum = crc; return ERROR_OK; diff --git a/src/target/riscv/riscv.c b/src/target/riscv/riscv.c index c26e635..c883b42 100644 --- a/src/target/riscv/riscv.c +++ b/src/target/riscv/riscv.c @@ -1853,7 +1853,86 @@ static int riscv_checksum_memory(struct target *target, target_addr_t address, uint32_t count, uint32_t *checksum) { - return ERROR_FAIL; + struct working_area *crc_algorithm; + struct reg_param reg_params[2]; + int retval; + + LOG_DEBUG("address=0x%" TARGET_PRIxADDR "; count=0x%" PRIx32, address, count); + + static const uint8_t riscv32_crc_code[] = { +#include "../../contrib/loaders/checksum/riscv32_crc.inc" + }; + static const uint8_t riscv64_crc_code[] = { +#include "../../contrib/loaders/checksum/riscv64_crc.inc" + }; + + static const uint8_t *crc_code; + + unsigned xlen = riscv_xlen(target); + unsigned crc_code_size; + if (xlen == 32) { + crc_code = riscv32_crc_code; + crc_code_size = sizeof(riscv32_crc_code); + } else { + crc_code = riscv64_crc_code; + crc_code_size = sizeof(riscv64_crc_code); + } + + if (count < crc_code_size * 4) { + /* Don't use the algorithm for relatively small buffers. It's faster + * just to read the memory. target_checksum_memory() will take care of + * that if we fail. */ + return ERROR_FAIL; + } + + retval = target_alloc_working_area(target, crc_code_size, &crc_algorithm); + if (retval != ERROR_OK) + return retval; + + if (crc_algorithm->address + crc_algorithm->size > address && + crc_algorithm->address < address + count) { + /* Region to checksum overlaps with the work area we've been assigned. + * Bail. (Would be better to manually checksum what we read there, and + * use the algorithm for the rest.) */ + target_free_working_area(target, crc_algorithm); + return ERROR_FAIL; + } + + retval = target_write_buffer(target, crc_algorithm->address, crc_code_size, + crc_code); + if (retval != ERROR_OK) { + LOG_ERROR("Failed to write code to " TARGET_ADDR_FMT ": %d", + crc_algorithm->address, retval); + target_free_working_area(target, crc_algorithm); + return retval; + } + + init_reg_param(®_params[0], "a0", xlen, PARAM_IN_OUT); + init_reg_param(®_params[1], "a1", xlen, PARAM_OUT); + buf_set_u64(reg_params[0].value, 0, xlen, address); + buf_set_u64(reg_params[1].value, 0, xlen, count); + + /* 20 second timeout/megabyte */ + int timeout = 20000 * (1 + (count / (1024 * 1024))); + + retval = target_run_algorithm(target, 0, NULL, 2, reg_params, + crc_algorithm->address, + 0, /* Leave exit point unspecified because we don't know. */ + timeout, NULL); + + if (retval == ERROR_OK) + *checksum = buf_get_u32(reg_params[0].value, 0, 32); + else + LOG_ERROR("error executing RISC-V CRC algorithm"); + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + + target_free_working_area(target, crc_algorithm); + + LOG_DEBUG("checksum=0x%" PRIx32 ", result=%d", *checksum, retval); + + return retval; } /*** OpenOCD Helper Functions ***/ |