mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-29 17:22:07 +00:00
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
92 lines
1.5 KiB
ArmAsm
92 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/arch/arm/lib/io-writesb.S
|
|
*
|
|
* Copyright (C) 1995-2000 Russell King
|
|
*/
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
.macro outword, rd
|
|
#ifndef __ARMEB__
|
|
strb \rd, [r0]
|
|
mov \rd, \rd, lsr #8
|
|
strb \rd, [r0]
|
|
mov \rd, \rd, lsr #8
|
|
strb \rd, [r0]
|
|
mov \rd, \rd, lsr #8
|
|
strb \rd, [r0]
|
|
#else
|
|
mov lr, \rd, lsr #24
|
|
strb lr, [r0]
|
|
mov lr, \rd, lsr #16
|
|
strb lr, [r0]
|
|
mov lr, \rd, lsr #8
|
|
strb lr, [r0]
|
|
strb \rd, [r0]
|
|
#endif
|
|
.endm
|
|
|
|
.Loutsb_align: rsb ip, ip, #4
|
|
cmp ip, r2
|
|
movgt ip, r2
|
|
cmp ip, #2
|
|
ldrb r3, [r1], #1
|
|
strb r3, [r0]
|
|
ldrbge r3, [r1], #1
|
|
strbge r3, [r0]
|
|
ldrbgt r3, [r1], #1
|
|
strbgt r3, [r0]
|
|
subs r2, r2, ip
|
|
bne .Loutsb_aligned
|
|
|
|
ENTRY(__raw_writesb)
|
|
teq r2, #0 @ do we have to check for the zero len?
|
|
reteq lr
|
|
ands ip, r1, #3
|
|
bne .Loutsb_align
|
|
|
|
.Loutsb_aligned:
|
|
stmfd sp!, {r4, r5, lr}
|
|
|
|
subs r2, r2, #16
|
|
bmi .Loutsb_no_16
|
|
|
|
.Loutsb_16_lp: ldmia r1!, {r3, r4, r5, ip}
|
|
outword r3
|
|
outword r4
|
|
outword r5
|
|
outword ip
|
|
subs r2, r2, #16
|
|
bpl .Loutsb_16_lp
|
|
|
|
tst r2, #15
|
|
ldmfdeq sp!, {r4, r5, pc}
|
|
|
|
.Loutsb_no_16: tst r2, #8
|
|
beq .Loutsb_no_8
|
|
|
|
ldmia r1!, {r3, r4}
|
|
outword r3
|
|
outword r4
|
|
|
|
.Loutsb_no_8: tst r2, #4
|
|
beq .Loutsb_no_4
|
|
|
|
ldr r3, [r1], #4
|
|
outword r3
|
|
|
|
.Loutsb_no_4: ands r2, r2, #3
|
|
ldmfdeq sp!, {r4, r5, pc}
|
|
|
|
cmp r2, #2
|
|
ldrb r3, [r1], #1
|
|
strb r3, [r0]
|
|
ldrbge r3, [r1], #1
|
|
strbge r3, [r0]
|
|
ldrbgt r3, [r1]
|
|
strbgt r3, [r0]
|
|
|
|
ldmfd sp!, {r4, r5, pc}
|
|
ENDPROC(__raw_writesb)
|