1/*
2 *  linux/arch/arm/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/config.h> /* for CONFIG_CPU_nn */
11#include <linux/linkage.h>
12#include <asm/assembler.h>
13#include <asm/hardware.h>
14
15		.text
16		.align
17
18		.equ	diff_pcio_base, PCIO_BASE - IO_BASE
19
20		.macro	outw2	rd
21		mov	r8, \rd, lsl #16
22		orr	r8, r8, r8, lsr #16
23		str	r8, [r3, r0, lsl #2]
24		mov	r8, \rd, lsr #16
25		orr	r8, r8, r8, lsl #16
26		str	r8, [r3, r0, lsl #2]
27		.endm
28
29		.macro	inw2	rd, mask, temp
30		ldr	\rd, [r0]
31		and	\rd, \rd, \mask
32		ldr	\temp, [r0]
33		orr	\rd, \rd, \temp, lsl #16
34		.endm
35
36		.macro	addr	rd
37		tst	\rd, #0x80000000
38		mov	\rd, \rd, lsl #2
39		add	\rd, \rd, #IO_BASE
40		addeq	\rd, \rd, #diff_pcio_base
41		.endm
42
43.iosl_warning:
44		.ascii	"<4>insl/outsl not implemented, called from %08lX\0"
45		.align
46
47/*
48 * These make no sense on Acorn machines.
49 * Print a warning message.
50 */
51ENTRY(insl)
52ENTRY(outsl)
53		adr	r0, .iosl_warning
54		mov	r1, lr
55		b	SYMBOL_NAME(printk)
56
57@ Purpose: write a memc register
58@ Proto  : void memc_write(int register, int value);
59@ Returns: nothing
60
61#ifdef CONFIG_CPU_26
62ENTRY(memc_write)
63		cmp	r0, #7
64		RETINSTR(movgt,pc,lr)
65		mov	r0, r0, lsl #17
66		mov	r1, r1, lsl #15
67		mov	r1, r1, lsr #17
68		orr	r0, r0, r1, lsl #2
69		add	r0, r0, #0x03600000
70		strb	r0, [r0]
71		RETINSTR(mov,pc,lr)
72#endif
73
74