71 lines
1.4 KiB
ArmAsm
71 lines
1.4 KiB
ArmAsm
/*
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* linux/arch/arm26/lib/io-acorn.S
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*
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* Copyright (C) 1995, 1996 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <asm/hardware.h>
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.text
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.align
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.equ diff_pcio_base, PCIO_BASE - IO_BASE
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.macro outw2 rd
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mov r8, \rd, lsl #16
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orr r8, r8, r8, lsr #16
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str r8, [r3, r0, lsl #2]
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mov r8, \rd, lsr #16
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orr r8, r8, r8, lsl #16
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str r8, [r3, r0, lsl #2]
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.endm
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.macro inw2 rd, mask, temp
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ldr \rd, [r0]
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and \rd, \rd, \mask
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ldr \temp, [r0]
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orr \rd, \rd, \temp, lsl #16
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.endm
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.macro addr rd
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tst \rd, #0x80000000
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mov \rd, \rd, lsl #2
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add \rd, \rd, #IO_BASE
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addeq \rd, \rd, #diff_pcio_base
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.endm
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.iosl_warning:
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.ascii "<4>insl/outsl not implemented, called from %08lX\0"
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.align
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/*
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* These make no sense on Acorn machines.
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* Print a warning message.
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*/
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ENTRY(insl)
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ENTRY(outsl)
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adr r0, .iosl_warning
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mov r1, lr
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b printk
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@ Purpose: write a memc register
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@ Proto : void memc_write(int register, int value);
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@ Returns: nothing
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ENTRY(memc_write)
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cmp r0, #7
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RETINSTR(movgt,pc,lr)
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mov r0, r0, lsl #17
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mov r1, r1, lsl #15
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mov r1, r1, lsr #17
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orr r0, r0, r1, lsl #2
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add r0, r0, #0x03600000
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strb r0, [r0]
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RETINSTR(mov,pc,lr)
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