int flash_check_prot_reg(unsigned int offset, unsigned int bytes)
{
unsigned int start;
unsigned int len;
uint8_t sr1 = 0, sr2 = 0;
int rv = EC_SUCCESS;
sr1 = flash_get_status1();
sr2 = flash_get_status2();
/* Invalid value */
if (offset + bytes > CONFIG_FLASH_PHYSICAL_SIZE)
return EC_ERROR_INVAL;
/* Compute current protect range */
rv = reg_to_protect(sr1, sr2, &start, &len);
if (rv)
return rv;
/* Check if ranges overlap */
if (MAX(start, offset) < MIN(start + len, offset + bytes))
return EC_ERROR_ACCESS_DENIED;
return EC_SUCCESS;
}
static int flash_command_spi_info(struct host_cmd_handler_args *args)
{
struct ec_response_flash_spi_info *r = args->response;
flash_get_jedec_id(r->jedec);
r->reserved0 = 0;
flash_get_mfr_dev_id(r->mfr_dev_id);
r->sr1 = flash_get_status1();
r->sr2 = flash_get_status2();
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
int flash_write_prot_reg(unsigned int offset, unsigned int bytes)
{
int rv;
uint8_t sr1 = flash_get_status1();
uint8_t sr2 = flash_get_status2();
/* Invalid values */
if (offset + bytes > CONFIG_FLASH_SIZE)
return EC_ERROR_INVAL;
/* Compute desired protect range */
rv = protect_to_reg(offset, bytes, &sr1, &sr2);
if (rv)
return rv;
return flash_set_status_for_prot(sr1, sr2);
}
