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fdd85e04df
Commit 2ee1503e54 ("MIPS: zboot: head.S clean up").
After .noreorder removed, clear BSS fall into endless loop. The bne
instruction will add nop to the delay slot at compile time. So a0
register will not increment by 4. Fix it and clear BSS from _edata
to (_end - 1).
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
53 lines
1.1 KiB
ArmAsm
53 lines
1.1 KiB
ArmAsm
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994, 1995 Waldorf Electronics
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* Written by Ralf Baechle and Andreas Busse
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* Copyright (C) 1995 - 1999 Ralf Baechle
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* Copyright (C) 1996 Paul M. Antoine
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* Modified for DECStation and hence R3000 support by Paul M. Antoine
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* Further modifications by David S. Miller and Harald Koerfgen
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* Copyright (C) 1999 Silicon Graphics, Inc.
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*/
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#include <asm/asm.h>
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#include <asm/regdef.h>
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LEAF(start)
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/* Save boot rom start args */
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move s0, a0
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move s1, a1
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move s2, a2
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move s3, a3
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/* Clear BSS */
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PTR_LA a0, _edata
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PTR_LA a2, _end
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1: sw zero, 0(a0)
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addiu a0, a0, 4
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bne a2, a0, 1b
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PTR_LA a0, (.heap) /* heap address */
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PTR_LA sp, (.stack + 8192) /* stack address */
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PTR_LA t9, decompress_kernel
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jalr t9
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2:
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move a0, s0
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move a1, s1
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move a2, s2
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move a3, s3
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PTR_LI t9, KERNEL_ENTRY
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jalr t9
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3:
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b 3b
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END(start)
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.comm .heap,BOOT_HEAP_SIZE,4
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.comm .stack,4096*2,4
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