diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1995-11-14 08:00:00 +0000 |
|---|---|---|
| committer | <ralf@linux-mips.org> | 1995-11-14 08:00:00 +0000 |
| commit | e7c2a72e2680827d6a733931273a93461c0d8d1b (patch) | |
| tree | c9abeda78ef7504062bb2e816bcf3e3c9d680112 /arch/alpha/boot/head.S | |
| parent | ec6044459060a8c9ce7f64405c465d141898548c (diff) | |
Import of Linux/MIPS 1.3.0
Diffstat (limited to 'arch/alpha/boot/head.S')
| -rw-r--r-- | arch/alpha/boot/head.S | 76 |
1 files changed, 48 insertions, 28 deletions
diff --git a/arch/alpha/boot/head.S b/arch/alpha/boot/head.S index 03a2a9010..efca165e6 100644 --- a/arch/alpha/boot/head.S +++ b/arch/alpha/boot/head.S @@ -1,44 +1,23 @@ /* - * alpha/head.S + * arch/alpha/boot/head.S * - * initial boot stuff.. + * initial bootloader stuff.. */ #include <asm/system.h> #define halt .long PAL_halt -/* - * NOTE! The console bootstrap will load us at 0x20000000, but this image - * is linked to run at START_ADDR, so the first thing we do is to move - * ourself up to the right address.. We'd better be position-independent - * at that stage :-) - */ .set noreorder .globl __start .ent __start __start: bis $31,$31,$31 - br $1,$200 - .long START_ADDR, START_ADDR >> 32 /* strange bug in the assembler.. duh */ - .long START_SIZE, START_SIZE >> 32 -$200: ldq $30,0($1) /* new stack - below this */ - lda $2,-8($1) /* __start */ - bis $30,$30,$3 /* new address */ - subq $3,$2,$6 /* difference */ - ldq $4,8($1) /* size */ -$201: subq $4,8,$4 - ldq $5,0($2) - addq $2,8,$2 - stq $5,0($3) - addq $3,8,$3 - bne $4,$201 - br $1,$202 -$202: addq $1,$6,$1 - addq $1,12,$1 /* $203 in the new address space */ - jmp $31,($1),$203 -$203: br $27,$100 -$100: ldgp $29,0($27) + 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,start_kernel jsr $26,($27),start_kernel halt @@ -109,3 +88,44 @@ switch_to_osf_pal: __do_swppal: .long PAL_swppal .end switch_to_osf_pal + +.globl dispatch +.ent dispatch +dispatch: + subq $30,80,$30 + stq $26,0($30) + stq $29,8($30) + + stq $8,16($30) + 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 + |