/* SPDX-License-Identifier: GPL-2.0 */
/*
* arch/alpha/boot/head.S
*
* initial bootloader stuff..
*/
#include <asm/pal.h>
.set noreorder
.globl __start
.ent __start
__start:
br $29,2f
2: ldgp $29,0($29)
jsr $26,start_kernel
call_pal PAL_halt
.end __start
.align 5
.globl wrent
.ent wrent
wrent:
.prologue 0
call_pal PAL_wrent
ret ($26)
.end wrent
.align 5
.globl wrkgp
.ent wrkgp
wrkgp:
.prologue 0
call_pal PAL_wrkgp
ret ($26)
.end wrkgp
.align 5
.globl switch_to_osf_pal
.ent switch_to_osf_pal
switch_to_osf_pal:
subq $30,128,$30
.frame $30,128,$26
stq $26,0($30)
stq $1,8($30)
stq $2,16($30)
stq $3,24($30)
stq $4,32($30)
stq $5,40($30)
stq $6,48($30)
stq $7,56($30)
stq $8,64($30)
stq $9,72($30)
stq $10,80($30)
stq $11,88($30)
stq $12,96($30)
stq $13,104($30)
stq $14,112($30)
stq $15,120($30)
.prologue 0
stq $30,0($17) /* save KSP in PCB */
bis $30,$30,$20 /* a4 = KSP */
br $17,1f
ldq $26,0($30)
ldq $1,8($30)
ldq $2,16($30)
ldq $3,24($30)
ldq $4,32($30)
ldq $5,40($30)
ldq $6,48($30)
ldq $7,56($30)
ldq $8,64($30)
ldq $9,72($30)
ldq $10,80($30)
ldq $11,88($30)
ldq $12,96($30)
ldq $13,104($30)
ldq $14,112($30)
ldq $15,120($30)
addq $30,128,$30
ret ($26)
1: call_pal PAL_swppal
.end switch_to_osf_pal
.align 3
.globl tbi
.ent tbi
tbi:
.prologue 0
call_pal PAL_tbi
ret ($26)
.end tbi
.align 3
.globl halt
.ent halt
halt:
.prologue 0
call_pal PAL_halt
.end halt
/* $16 - new stack page */
.align 3
.globl move_stack
.ent move_stack
move_stack:
.prologue 0
lda $0, 0x1fff($31)
and $0, $30, $1 /* Stack offset */
or $1, $16, $16 /* New stack pointer */
mov $30, $1
mov $16, $2
1: ldq $3, 0($1) /* Move the stack */
addq $1, 8, $1
stq $3, 0($2)
and $0, $1, $4
addq $2, 8, $2
bne $4, 1b
mov $16, $30
ret ($26)
.end move_stack
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