I want to use MPC5554 chip ECSM module software watchdog, related documents?
ECSM's software watchdog timer is not recommended to use on MPC5554 device.
For core watchdog you may see following appnote:
https://www.nxp.com/docs/en/application-note/AN2817.pdf
If you want only disable core watchdog, you may use following function:
asm
{
mfhid0 r11 /* Move from spr HID0 to r11 (copies HID0) */
li r12, 0xBFFF /* Load immed. data of ~0x4000 to r12 */
oris r12, r12, 0xFFFF
and r11, r12, r11 /* OR r12 (~0x00004000) with r11 (HID0 value) */
mthid0 r11 /* Move result to HID0 */
lis r12, 0x00
mtspr tcr, r12 /* clear SPR TCR register */
}