163 lines
3.3 KiB
ArmAsm
163 lines
3.3 KiB
ArmAsm
/* $NetBSD: bootxx.S,v 1.2 2012/01/21 19:44:30 nonaka Exp $ */
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/*-
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* Copyright (C) 2005 NONAKA Kimihiro <nonaka@netbsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#include <sys/bootblock.h>
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ENTRY(bootxx_start)
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bra bootxx_start1
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nop
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.balign 4
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ENTRY(bootxx_magic)
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.long LANDISK_BOOT_MAGIC_1
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boot_params:
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.long 1f - boot_params
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#include <boot_params.S>
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. = bootxx_start + 0x80
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bootxx_start1:
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mov.l .L._end, r0 /* zero bss */
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mov.l .L.__bss_start, r1
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sub r1, r0
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shlr2 r0 /* _end and __bss_start are aligned */
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mov #0, r2
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1: mov.l r2, @r1
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dt r0
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bf/s 1b
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add #4, r1
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mov.l .L.2nd_loadaddr, r15 /* new stack pointer */
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mov.l r4, @-r15
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mov.l .L.boot1, r0
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jsr @r0
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mov r15, r4
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tst r0, r0
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bf/s boot_fail
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mov.l @r15+, r5 /* pass boot sector to boot */
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/* flush cache */
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mov #0, r4
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mov #6, r0
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trapa #0x3f
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mov.l .L.2nd_loadaddr, r0
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mov.l .L.boot_params, r4
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jmp @r0
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nop
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boot_fail:
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mov r0, r1
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mova .L.errtxt, r0
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mov r0, r4
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mov #32, r0
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trapa #0x3f
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mov r1, r4
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mov #32, r0
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trapa #0x3f
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mova .L.crlf, r0
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mov r0, r4
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mov #32, r0
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trapa #0x3f
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99: bra 99b
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nop
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.align 2
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.L._end:
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.long _end
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.L.__bss_start:
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.long __bss_start
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.L.boot1:
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.long _C_LABEL(boot1)
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.L.2nd_loadaddr:
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.long SECONDARY_LOAD_ADDRESS
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.L.boot_params:
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.long boot_params
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.align 2
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.L.errtxt: .asciz "Error: "
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.align 2
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.L.crlf: .asciz "\r\n"
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/*
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* Vector the fs calls through here so we can support multiple
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* file system types with one copy of the library code and
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* multiple copies of this file.
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*/
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ENTRY(xxfs_open)
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mov.l 1f, r0
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jmp @r0
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nop
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.align 2
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1: .long _C_LABEL(XXfs_open)
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ENTRY(xxfs_close)
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mov.l 1f, r0
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jmp @r0
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nop
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.align 2
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1: .long _C_LABEL(XXfs_close)
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ENTRY(xxfs_read)
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mov.l 1f, r0
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jmp @r0
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nop
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.align 2
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1: .long _C_LABEL(XXfs_read)
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ENTRY(xxfs_stat)
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mov.l 1f, r0
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jmp @r0
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nop
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.align 2
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1: .long _C_LABEL(XXfs_stat)
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/*
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* int readsects(int dev, uint32_t lba, void *buf, size_t size);
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*/
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ENTRY(readsects)
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mov #2, r0
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trapa #0x3f
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rts
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nop
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argerror:
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rts
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mov #-1, r0
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/*
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* void putstr(const char *str);
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*/
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ENTRY(putstr)
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mov #32, r0
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trapa #0x3f
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rts
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nop
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