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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/arm/lib/io-readsw-armv3.S | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/arm/lib/io-readsw-armv3.S')
-rw-r--r-- | arch/arm/lib/io-readsw-armv3.S | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/arch/arm/lib/io-readsw-armv3.S b/arch/arm/lib/io-readsw-armv3.S new file mode 100644 index 00000000..88487c8c --- /dev/null +++ b/arch/arm/lib/io-readsw-armv3.S @@ -0,0 +1,106 @@ +/* + * linux/arch/arm/lib/io-readsw-armv3.S + * + * Copyright (C) 1995-2000 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. + */ +#include <linux/linkage.h> +#include <asm/assembler.h> + +.Linsw_bad_alignment: + adr r0, .Linsw_bad_align_msg + mov r2, lr + b panic +.Linsw_bad_align_msg: + .asciz "insw: bad buffer alignment (0x%p, lr=0x%08lX)\n" + .align + +.Linsw_align: tst r1, #1 + bne .Linsw_bad_alignment + + ldr r3, [r0] + strb r3, [r1], #1 + mov r3, r3, lsr #8 + strb r3, [r1], #1 + + subs r2, r2, #1 + moveq pc, lr + +ENTRY(__raw_readsw) + teq r2, #0 @ do we have to check for the zero len? + moveq pc, lr + tst r1, #3 + bne .Linsw_align + +.Linsw_aligned: mov ip, #0xff + orr ip, ip, ip, lsl #8 + stmfd sp!, {r4, r5, r6, lr} + + subs r2, r2, #8 + bmi .Lno_insw_8 + +.Linsw_8_lp: ldr r3, [r0] + and r3, r3, ip + ldr r4, [r0] + orr r3, r3, r4, lsl #16 + + ldr r4, [r0] + and r4, r4, ip + ldr r5, [r0] + orr r4, r4, r5, lsl #16 + + ldr r5, [r0] + and r5, r5, ip + ldr r6, [r0] + orr r5, r5, r6, lsl #16 + + ldr r6, [r0] + and r6, r6, ip + ldr lr, [r0] + orr r6, r6, lr, lsl #16 + + stmia r1!, {r3 - r6} + + subs r2, r2, #8 + bpl .Linsw_8_lp + + tst r2, #7 + ldmeqfd sp!, {r4, r5, r6, pc} + +.Lno_insw_8: tst r2, #4 + beq .Lno_insw_4 + + ldr r3, [r0] + and r3, r3, ip + ldr r4, [r0] + orr r3, r3, r4, lsl #16 + + ldr r4, [r0] + and r4, r4, ip + ldr r5, [r0] + orr r4, r4, r5, lsl #16 + + stmia r1!, {r3, r4} + +.Lno_insw_4: tst r2, #2 + beq .Lno_insw_2 + + ldr r3, [r0] + and r3, r3, ip + ldr r4, [r0] + orr r3, r3, r4, lsl #16 + + str r3, [r1], #4 + +.Lno_insw_2: tst r2, #1 + ldrne r3, [r0] + strneb r3, [r1], #1 + movne r3, r3, lsr #8 + strneb r3, [r1] + + ldmfd sp!, {r4, r5, r6, pc} + + |