Compaq 21264 Hardware Reference Manual page 305

Restriction 1 : Reset Sequence Required by Retire Logic and Mapper
mtpr r31,EV6__PCTR_CTL /* 2nd buffer fetch block for above map-stall
bis r31,1,r0
bis r31,1,r0
mulq r31,r31,r0
lda r0,0x780(r31)
mb
whint r0
mb
bis r31,1,r0
ldq_p r1,0x780(r31)
ldq_p r0,0x788(r31)
mb
mb
stq_p r1,0x780(r31)
stq_p r0,0x788(r31)
bis r31, 32, r0
jsr_init_loop:
bsr r31,jsr_init_loop_nxt
jsr_init_loop_nxt:
stq_p r1,0x780(r31)
subq r0,1,r0
beq r0,jsr_init_done
br r31,jsr_init_loop /* continue loop*/
jsr_init_done:
lda r0,0x03FF(r31)
sll r0,52,r0
itoft r0,f0
addq r31,r31,r1
mult f0,f0,f0
addt f0,f0,f0
divt f0,f0,f0
sqrtt f0,f0
cvtqt f0,f0
perr r31,r31,r0
maxuw4 r31,r31,r0
pkwb r31,r0
rc r0
addq r31,r31,r1
addq r31,r31,r1
addq r31,r31,r1
/*
* This palbase init exists for the rare cases
* when this code is loaded into upper memory.
* That is the case when this code is loaded
* and executed in memory on a system that has
* already been initialized. This technique
* can sometimes be used to debug snippets of
* this code.
*/
Alpha 21264/EV67 Hardware Reference Manual
/* and 2nd clear PCTR_CTL (SCRBRD=4)*/
/* set up value for demon write*/
/* set up value for demon write*/
/* nop*/
/* this is new initialization stuff to
prevent*/
/* ld/st below from going off-chip */
/* set up value for demon write*/
/* flush Pipe 0 LD logic*/
/* flush Pipe 1 LD logic*/
/* wait for LD's to complete*/
/* wait for LD's to complete*/
/* flush Pipe 0 ST logic*/
/* flush Pipe 1 ST logic*/
/* load loop count of 32*/
/* JSR to PC+4*/
/* flush Pipe 0 ST logic*/
/* decrement loop count*/
/* done?*/
/* create FP one..... */
/* .....value = 0x3FF0000000000000 */
/* put it into F0 reg */
/* nop (also clears R1) */
/* flush mul-pipe */
/* flush add-pipe */
/* flush div-pipe */
/* flush div-pipe */
/* flush add-pipe (integer logic) */
/* flush MVI logic */
/* flush MVI logic */
/* flush MVI logic */
/* clear interrupt flag*/
/* nop (also clears R1)*/
/* nop (also clears R1)*/
/* nop (also clears R1)*/
PALcode Restrictions and Guidelines
D–7