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/* $OpenBSD: srt0.S,v 1.3 2006/10/29 14:47:59 drahn Exp $ */
/* $NetBSD: boot.S,v 1.1 2006/09/01 21:26:18 uwe Exp $ */
/*-
* Copyright (c) 2005 NONAKA Kimihiro
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <machine/asm.h>
ENTRY(start)
bra boot_start1
nop
.balign 4
ENTRY(boot_magic)
.long 0x20041110
ENTRY(boot_params)
.long boot_start1 - boot_params
. = start + 0x80
boot_start1:
mov r4, r0
add #-4, r0
mov.l @(0, r0), r0
mov.l .L.boot_magic1, r1
cmp/eq r0, r1
bf 2f
mov r4, r0
mov.l .L.boot_params_size, r3
mov.l @r0, r2
mov.l .L.boot_params, r1
cmp/hi r3, r2
bf 1f
mov r3, r2
1: mov.b @r0+, r3
mov.b r3, @r1
dt r2
bf/s 1b
add #1, r1
2:
mov.l .L._end, r0 /* zero bss */
mov.l .L.__bss_start, r1
sub r1, r0
shlr2 r0 /* _end and __bss_start are aligned */
mov #0, r2
1: mov.l r2, @r1
dt r0
bf/s 1b
add #4, r1
mov.l .L.boot, r0
jsr @r0
mov r5, r4
boot_fail:
mov r0, r1
mova .L.errtxt, r0
mov r0, r4
mov #32, r0
trapa #0x3f
mov r1, r4
mov #32, r0
trapa #0x3f
mova .L.crlf, r0
mov r0, r4
mov #32, r0
trapa #0x3f
99: bra 99b
nop
ENTRY(halt)
mova .L.pwrctl, r0
mov #1, r1
mov.b @r1, r0
rts
nop
ENTRY(reboot)
ENTRY(_rtt)
mov #1, r4 /* reboot */
mov #11, r0
trapa #0x3f
mov.l .L.start, r0
jmp @r0
nop
/*
* int raise(int sig);
*/
ENTRY(raise)
rts
nop
/*
*
*/
ENTRY(cnset)
rts
nop
/*
* int readsects(int dev, uint32_t lba, void *buf, size_t size);
*/
ENTRY(readsects)
mov #2, r0
trapa #0x3f
rts
nop
/*
* void cache_flush(void);
*/
ENTRY(cache_flush)
/* flush cache */
mov #0, r4
mov #6, r0
trapa #0x3f
rts
nop
/*
* void cache_disable(void);
*/
ENTRY(cache_disable)
mov #1, r4
mov #6, r0
trapa #0x3f
rts
nop
.align 2
.L.boot_magic1:
.long 0x20031125
.L.boot_params:
.long boot_params
.L.boot_params_size:
.long boot_start1 - boot_params
.L._end:
.long _end
.L.__bss_start:
.long __bss_start
.L.boot:
.long _C_LABEL(boot)
.L.start:
.long 0xc0000000
.L.pwrctl:
.long 0xb0000003
.align 2
.L.errtxt: .asciz ">>BOOT FAILED: "
.align 2
.L.crlf: .asciz "\r\n"
|
