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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/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 printk
56
57@ Purpose: write a memc register
58@ Proto : void memc_write(int register, int value);
59@ Returns: nothing
60
61ENTRY(memc_write)
62 cmp r0, #7
63 RETINSTR(movgt,pc,lr)
64 mov r0, r0, lsl #17
65 mov r1, r1, lsl #15
66 mov r1, r1, lsr #17
67 orr r0, r0, r1, lsl #2
68 add r0, r0, #0x03600000
69 strb r0, [r0]
70 RETINSTR(mov,pc,lr)
71