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/* $OpenBSD: bootxx.S,v 1.1 2006/10/06 21:48:50 mickey Exp $ */
/* $NetBSD: bootxx.S,v 1.1 2006/09/01 21:26:19 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(bootxx_start)
bra bootxx_start1
nop
.balign 4
ENTRY(bootxx_magic)
.long 0x20031125
boot_params:
.long 1f - boot_params
. = bootxx_start + 0x80
bootxx_start1:
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.2nd_loadaddr, r15 /* new stack pointer */
mov.l r4, @-r15
mov.l .L.boot1, r0
jsr @r0
mov r15, r4
tst r0, r0
bf/s boot_fail
mov.l @r15+, r5 /* pass boot sector to boot */
/* flush cache */
mov #0, r4
mov #6, r0
trapa #0x3f
mov.l .L.2nd_loadaddr, r0
mov.l .L.boot_params, r4
jmp @r0
nop
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
.align 2
.L._end:
.long _end
.L.__bss_start:
.long __bss_start
.L.boot1:
.long _C_LABEL(boot1)
.L.2nd_loadaddr:
.long LOADADDRESS
.L.boot_params:
.long boot_params
.align 2
.L.errtxt: .asciz "Error: "
.align 2
.L.crlf: .asciz "\r\n"
/*
* int readsects(int dev, uint32_t lba, void *buf, size_t size);
*/
ENTRY(readsects)
mov #2, r0
trapa #0x3f
rts
nop
argerror:
rts
mov #-1, r0
/*
* void putstr(const char *str);
*/
ENTRY(putstr)
mov #32, r0
trapa #0x3f
rts
nop
/*
* void putchar(int c);
*/
ENTRY(putchar)
mov #31, r0
trapa #0x3f
rts
nop
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