mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 04:05:18 +07:00
93ed397011
This declaration specifies the "function" type and size for various assembly functions, mainly needed for generating the correct branch instructions in Thumb-2. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
48 lines
1.3 KiB
ArmAsm
48 lines
1.3 KiB
ArmAsm
/*
|
|
* 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/asm-offsets.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 )
|
|
ldmfd sp!, {r4, pc} @ 3
|
|
ENDPROC(copy_page)
|