40 строки
833 B
ArmAsm
40 строки
833 B
ArmAsm
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/*
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* linux/arch/unicore32/lib/copy_page.S
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* ASM optimised string functions
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <generated/asm-offsets.h>
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#include <asm/cache.h>
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#define COPY_COUNT (PAGE_SZ/256)
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.text
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.align 5
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/*
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* UniCore optimised copy_page routine
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*/
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ENTRY(copy_page)
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stm.w (r17 - r19, lr), [sp-]
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mov r17, r0
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mov r18, r1
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mov r19, #COPY_COUNT
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1:
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.rept 4
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ldm.w (r0 - r15), [r18]+
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stm.w (r0 - r15), [r17]+
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.endr
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sub.a r19, r19, #1
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bne 1b
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ldm.w (r17 - r19, pc), [sp]+
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ENDPROC(copy_page)
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