/* * linux/arch/arm/lib/io-writesw-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> .Loutsw_bad_alignment: adr r0, .Loutsw_bad_align_msg mov r2, lr b panic .Loutsw_bad_align_msg: .asciz "outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n" .align .Loutsw_align: tst r1, #1 bne .Loutsw_bad_alignment add r1, r1, #2 ldr r3, [r1, #-4] mov r3, r3, lsr #16 orr r3, r3, r3, lsl #16 str r3, [r0] subs r2, r2, #1 moveq pc, lr ENTRY(__raw_writesw) teq r2, #0 @ do we have to check for the zero len? moveq pc, lr tst r1, #3 bne .Loutsw_align stmfd sp!, {r4, r5, r6, lr} subs r2, r2, #8 bmi .Lno_outsw_8 .Loutsw_8_lp: ldmia r1!, {r3, r4, r5, r6} mov ip, r3, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r3, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] mov ip, r4, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r4, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] mov ip, r5, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r5, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] mov ip, r6, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r6, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] subs r2, r2, #8 bpl .Loutsw_8_lp tst r2, #7 ldmeqfd sp!, {r4, r5, r6, pc} .Lno_outsw_8: tst r2, #4 beq .Lno_outsw_4 ldmia r1!, {r3, r4} mov ip, r3, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r3, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] mov ip, r4, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r4, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] .Lno_outsw_4: tst r2, #2 beq .Lno_outsw_2 ldr r3, [r1], #4 mov ip, r3, lsl #16 orr ip, ip, ip, lsr #16 str ip, [r0] mov ip, r3, lsr #16 orr ip, ip, ip, lsl #16 str ip, [r0] .Lno_outsw_2: tst r2, #1 ldrne r3, [r1] movne ip, r3, lsl #16 orrne ip, ip, ip, lsr #16 strne ip, [r0] ldmfd sp!, {r4, r5, r6, pc}