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133 lines
2.9 KiB
ArmAsm
133 lines
2.9 KiB
ArmAsm
/* $NetBSD: boot.S,v 1.1 2006/09/01 21:26:18 uwe Exp $ */
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/*-
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* Copyright (c) 2005 NONAKA Kimihiro
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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 REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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(boot_start)
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bra boot_start1
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nop
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.balign 4
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ENTRY(boot_magic)
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.long LANDISK_BOOT_MAGIC_2
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ENTRY(boot_params)
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.long boot_start1 - boot_params
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#include <boot_params.S>
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. = boot_start + 0x80
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boot_start1:
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mov r4, r0
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add #-4, r0
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mov.l @(0, r0), r0
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mov.l .L.boot_magic1, r1
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cmp/eq r0, r1
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bf 2f
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mov r4, r0
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mov.l .L.boot_params_size, r3
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mov.l @r0, r2
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mov.l .L.boot_params, r1
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cmp/hi r3, r2
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bf 1f
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mov r3, r2
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1: mov.b @r0+, r3
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mov.b r3, @r1
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dt r2
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bf/s 1b
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add #1, r1
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2:
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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.boot2, r0
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jsr @r0
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mov r5, r4
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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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ENTRY(halt)
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mova .L.pwrctl, r0
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mov #1, r1
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mov.b @r1, r0
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rts
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nop
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ENTRY(reboot)
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ENTRY(_rtt)
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mov #1, r4 /* reboot */
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mov #11, r0
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trapa #0x3f
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mov.l .L.start, r0
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jmp @r0
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nop
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.align 2
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.L.boot_magic1:
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.long LANDISK_BOOT_MAGIC_1
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.L.boot_params:
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.long boot_params
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.L.boot_params_size:
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.long boot_start1 - boot_params
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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.boot2:
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.long _C_LABEL(boot2)
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.L.start:
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.long 0xc0000000
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.L.pwrctl:
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.long 0xb0000003
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.align 2
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.L.errtxt: .asciz "Boot2 failed: "
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.align 2
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.L.crlf: .asciz "\r\n"
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