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_set_status_for_prot(int reg1, int reg2)
{
/* Lock physical flash operations */
flash_lock_mapped_storage(1);
/* Disable tri-state */
TRISTATE_FLASH(0);
/* Enable write */
flash_write_enable();
NPCX_UMA_DB0 = reg1;
NPCX_UMA_DB1 = reg2;
/* Write status register 1/2 */
flash_execute_cmd(CMD_WRITE_STATUS_REG, MASK_CMD_WR_2BYTE);
/* Enable tri-state */
TRISTATE_FLASH(1);
/* Unlock physical flash operations */
flash_lock_mapped_storage(0);
reg_to_protect(reg1, reg2, &addr_prot_start, &addr_prot_length);
return EC_SUCCESS;
}