Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
46
arch/arm/lib/copy_page.S
Normal file
46
arch/arm/lib/copy_page.S
Normal file
@@ -0,0 +1,46 @@
|
||||
/*
|
||||
* linux/arch/arm/lib/copypage.S
|
||||
*
|
||||
* Copyright (C) 1995-1999 Russell King
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* ASM optimised string functions
|
||||
*/
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/assembler.h>
|
||||
#include <asm/constants.h>
|
||||
|
||||
#define COPY_COUNT (PAGE_SZ/64 PLD( -1 ))
|
||||
|
||||
.text
|
||||
.align 5
|
||||
/*
|
||||
* StrongARM optimised copy_page routine
|
||||
* now 1.78bytes/cycle, was 1.60 bytes/cycle (50MHz bus -> 89MB/s)
|
||||
* Note that we probably achieve closer to the 100MB/s target with
|
||||
* the core clock switching.
|
||||
*/
|
||||
ENTRY(copy_page)
|
||||
stmfd sp!, {r4, lr} @ 2
|
||||
PLD( pld [r1, #0] )
|
||||
PLD( pld [r1, #32] )
|
||||
mov r2, #COPY_COUNT @ 1
|
||||
ldmia r1!, {r3, r4, ip, lr} @ 4+1
|
||||
1: PLD( pld [r1, #64] )
|
||||
PLD( pld [r1, #96] )
|
||||
2: stmia r0!, {r3, r4, ip, lr} @ 4
|
||||
ldmia r1!, {r3, r4, ip, lr} @ 4+1
|
||||
stmia r0!, {r3, r4, ip, lr} @ 4
|
||||
ldmia r1!, {r3, r4, ip, lr} @ 4+1
|
||||
stmia r0!, {r3, r4, ip, lr} @ 4
|
||||
ldmia r1!, {r3, r4, ip, lr} @ 4
|
||||
subs r2, r2, #1 @ 1
|
||||
stmia r0!, {r3, r4, ip, lr} @ 4
|
||||
ldmgtia r1!, {r3, r4, ip, lr} @ 4
|
||||
bgt 1b @ 1
|
||||
PLD( ldmeqia r1!, {r3, r4, ip, lr} )
|
||||
PLD( beq 2b )
|
||||
LOADREGS(fd, sp!, {r4, pc}) @ 3
|
Reference in New Issue
Block a user