IBM SA14-2339-04 Manual Do Utilizador
3-6
PPC405 Core User’s Manual
mtspr(EVPR, prefix_addr);
/* initialize exception vector prefix
*/
/* Initialize vector table and interrupt handlers if not already done */
/* Initialize and configure timer facilities
*/
mtspr(PIT, 0);
/* clear PIT so no PIT indication after TSR cleared*/
mtspr(TSR, 0xFFFFFFFF);
/* clear TSR
*/
mtspr(TCR, timer_enable);
/* enable desired timers
*/
mtspr(TBL, 0);
/* reset time base low first to avoid ripple
*/
mtspr(TBU, time_base_u);
/* set time base, hi first to catch possible ripple */
mtspr(TBL, time_base_l);
/* set time base, low
*/
mtspr(PIT, pit_count);
/* set desired PIT count
*/
/* Initialize the MSR
*/
/*————————————————————————————————————
*/
/* Exceptions must be enabled immediately after timer facilities to avoid missing a
*/
/* timer exception.
*/
/*
*/
/* The MSR also controls privileged/user mode, translation, and the wait state.
*/
/* These must be initialized by the operating system or application code.
*/
/* If enabling translation, code must initialize the TLB.
*/
/*————————————————————————————————————
*/
mtmsr(machine_state);
/*————————————————————————————————————
*/
/* Initialization of other processor facilities should be performed at this time.
*/
/*————————————————————————————————————
*/
/*————————————————————————————————————
*/
/* Initialization of non-processor facilities should be performed at this time.
*/
/*————————————————————————————————————
*/
/*————————————————————————————————————
*/
/* Branch to operating system or application code can occur at this time.
*/
/*————————————————————————————————————
*/