1/*
2 *  linux/arch/arm26/lib/io-acorn.S
3 *
4 *  Copyright (C) 1995, 1996 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#include <linux/linkage.h>
11#include <asm/assembler.h>
12#include <asm/hardware.h>
13
14		.text
15		.align
16
17		.equ	diff_pcio_base, PCIO_BASE - IO_BASE
18
19		.macro	outw2	rd
20		mov	r8, \rd, lsl #16
21		orr	r8, r8, r8, lsr #16
22		str	r8, [r3, r0, lsl #2]
23		mov	r8, \rd, lsr #16
24		orr	r8, r8, r8, lsl #16
25		str	r8, [r3, r0, lsl #2]
26		.endm
27
28		.macro	inw2	rd, mask, temp
29		ldr	\rd, [r0]
30		and	\rd, \rd, \mask
31		ldr	\temp, [r0]
32		orr	\rd, \rd, \temp, lsl #16
33		.endm
34
35		.macro	addr	rd
36		tst	\rd, #0x80000000
37		mov	\rd, \rd, lsl #2
38		add	\rd, \rd, #IO_BASE
39		addeq	\rd, \rd, #diff_pcio_base
40		.endm
41
42.iosl_warning:
43		.ascii	"<4>insl/outsl not implemented, called from %08lX\0"
44		.align
45
46/*
47 * These make no sense on Acorn machines.
48 * Print a warning message.
49 */
50ENTRY(insl)
51ENTRY(outsl)
52		adr	r0, .iosl_warning
53		mov	r1, lr
54		b	printk
55
56@ Purpose: write a memc register
57@ Proto  : void memc_write(int register, int value);
58@ Returns: nothing
59
60ENTRY(memc_write)
61		cmp	r0, #7
62		RETINSTR(movgt,pc,lr)
63		mov	r0, r0, lsl #17
64		mov	r1, r1, lsl #15
65		mov	r1, r1, lsr #17
66		orr	r0, r0, r1, lsl #2
67		add	r0, r0, #0x03600000
68		strb	r0, [r0]
69		RETINSTR(mov,pc,lr)
70