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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/lib/io-writesl.S | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/lib/io-writesl.S')
-rw-r--r-- | arch/arm/lib/io-writesl.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/arm/lib/io-writesl.S b/arch/arm/lib/io-writesl.S new file mode 100644 index 000000000..89ef7be61 --- /dev/null +++ b/arch/arm/lib/io-writesl.S @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/arch/arm/lib/io-writesl.S + * + * Copyright (C) 1995-2000 Russell King + */ +#include <linux/linkage.h> +#include <asm/assembler.h> + +ENTRY(__raw_writesl) + teq r2, #0 @ do we have to check for the zero len? + reteq lr + ands ip, r1, #3 + bne 3f + + subs r2, r2, #4 + bmi 2f + stmfd sp!, {r4, lr} +1: ldmia r1!, {r3, r4, ip, lr} + subs r2, r2, #4 + str r3, [r0, #0] + str r4, [r0, #0] + str ip, [r0, #0] + str lr, [r0, #0] + bpl 1b + ldmfd sp!, {r4, lr} +2: movs r2, r2, lsl #31 + ldmiacs r1!, {r3, ip} + strcs r3, [r0, #0] + ldrne r3, [r1, #0] + strcs ip, [r0, #0] + strne r3, [r0, #0] + ret lr + +3: bic r1, r1, #3 + ldr r3, [r1], #4 + cmp ip, #2 + blt 5f + bgt 6f + +4: mov ip, r3, lspull #16 + ldr r3, [r1], #4 + subs r2, r2, #1 + orr ip, ip, r3, lspush #16 + str ip, [r0] + bne 4b + ret lr + +5: mov ip, r3, lspull #8 + ldr r3, [r1], #4 + subs r2, r2, #1 + orr ip, ip, r3, lspush #24 + str ip, [r0] + bne 5b + ret lr + +6: mov ip, r3, lspull #24 + ldr r3, [r1], #4 + subs r2, r2, #1 + orr ip, ip, r3, lspush #8 + str ip, [r0] + bne 6b + ret lr +ENDPROC(__raw_writesl) |