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|
/*
* arch/alpha/boot/head.S
*
* initial bootloader stuff..
*/
#include "pal.h"
#include <config.h>
.set noreorder
.globl __start
.ent __start
__start:
.prologue 0
bis $31,$31,$31
br 1f
/* room for the initial PCB, which comes here */
.quad 0,0,0,0,0,0,0,0
1: br $27,2f
2: ldgp $29,0($27)
lda $27,main_
jsr $26,($27),main_
call_pal PAL_halt
.end __start
/* these must appear within first 512 bytes: */
.align 3
.quad ABOOT_MAGIC
config_file_partition:
.globl config_file_partition
.quad CONFIG_FILE_PARTITION
raw_initrd_size:
.globl raw_initrd_size
.quad 0
.align 3
.globl wrent
.ent wrent
wrent:
.prologue 0
call_pal PAL_wrent
ret ($26)
.end wrent
.align 3
.globl wrkgp
.ent wrkgp
wrkgp:
.prologue 0
call_pal PAL_wrkgp
ret ($26)
.end wrkgp
.align 3
.globl tbi
.ent tbi
tbi:
.prologue 0
call_pal PAL_tbi
ret ($26)
.end tbi
.align 3
.globl switch_to_osf_pal
.ent switch_to_osf_pal
switch_to_osf_pal:
.prologue 0
subq $30,128,$30
stq $26,0($30)
stq $1,8($30) # regs clobbered by swppal
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)
stq $30,0($17) /* save KSP in PCB (a1) */
bis $30,$30,$20 /* a4 = KSP */
br $17,__do_swppal
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)
__do_swppal:
call_pal PAL_swppal
.end switch_to_osf_pal
.align 3
.globl dispatch
.ent dispatch
dispatch:
.prologue 0
subq $30,80,$30
stq $26,0($30)
stq $29,8($30)
stq $8,16($30) /* OpenVMS save regs */
stq $9,24($30)
stq $10,32($30)
stq $11,40($30)
stq $12,48($30)
stq $13,56($30)
stq $14,64($30)
stq $15,72($30)
lda $1,0x10000000 /* hwrpb */
ldq $2,0xc0($1) /* crb offset */
addq $2,$1,$2 /* crb */
ldq $27,0($2) /* dispatch procedure value */
ldq $2,8($27) /* dispatch call address */
jsr $26,($2) /* call it (weird VMS call seq) */
ldq $26,0($30)
ldq $29,8($30)
ldq $8,16($30)
ldq $9,24($30)
ldq $10,32($30)
ldq $11,40($30)
ldq $12,48($30)
ldq $13,56($30)
ldq $14,64($30)
ldq $15,72($30)
addq $30,80,$30
ret $31,($26)
.end dispatch
.align 3
.globl halt
.ent halt
halt:
.prologue 0
call_pal PAL_halt
.end halt
.ent run_kernel
.globl run_kernel
run_kernel:
.prologue 0
mov $16,$27
mov $17,$30
jmp $31,($27)
.end run_kernel
|
