94 lines
2.6 KiB
ArmAsm
94 lines
2.6 KiB
ArmAsm
/* $NetBSD: entry.S,v 1.1 2011/03/03 05:59:37 kiyohara Exp $ */
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/*
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* Copyright (c) 2011 KIYOHARA Takashi
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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
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sh3/asm.h>
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#include <sh3/locore.h>
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#include <sh3/mmu_sh3.h>
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#include <sh3/mmu_sh4.h>
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#if defined(SH3) && defined(SH4)
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#error "mmeye port don't support SH3,SH4 common kernel."
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#elif defined(SH3)
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#define RAM_BEGIN 0x8c000000 /* Area3 */
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#define RAM_SIZE 0x01000000 /* 16M */
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#elif defined(SH4)
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#define RAM_BEGIN 0x88000000 /* Area2 */
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#define RAM_SIZE 0x04000000 /* 64M */
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#endif
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#define INIT_STACK (RAM_BEGIN + RAM_SIZE - 0x00001000)
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NENTRY(start)
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/* Set SP to initial position */
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mov.l XLtmpstk, r15
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__INTR_MASK(r0, r1)
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/* Set Register Bank to Bank 0 */
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mov.l SR_init, r0
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ldc r0, sr
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xor r0, r0
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MOV (MMUCR, r2)
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mov.l r0, @r2 /* MMU OFF */
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bra start1
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nop
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.align 2
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SR_init: .long 0x500000F0
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REG_SYMBOL(MMUCR)
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start1:
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#if defined(SH4)
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/* Copy boot image from _LOADADDR to ___start */
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mov.l _LOADADDR, r1
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mov.l ___end, r0
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mov.l ___start, r3
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sub r3, r0
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add #4, r0 /* size of bytes to be copied */
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shlr2 r0 /* number of long word */
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1:
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mov.l @r1+, r4
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mov.l r4, @r3
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add #4, r3
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dt r0 /* decrement and Test */
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bf 1b
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/* boot image copy end */
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#endif
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mov.l XLmain, r0
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jmp @r0 /* jump to main() */
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nop
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.align 2
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_LOADADDR: .long 0x88010000 /* loaded here by 1st loader. */
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___start: .long start
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___end: .long _end
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XLtmpstk: .long INIT_STACK
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XLmain: .long _C_LABEL(main)
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