Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/sh/kernel/io.c |
| 3 | * |
| 4 | * Copyright (C) 2000 Stuart Menefy |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 5 | * Copyright (C) 2005 Paul Mundt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * Provide real functions which expand to whatever the header file defined. |
| 8 | * Also definitions of machine independent IO functions. |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 9 | * |
| 10 | * This file is subject to the terms and conditions of the GNU General Public |
| 11 | * License. See the file "COPYING" in the main directory of this archive |
| 12 | * for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 15 | #include <asm/machvec.h> |
| 16 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | /* |
| 19 | * Copy data from IO memory space to "real" memory space. |
| 20 | * This needs to be optimized. |
| 21 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 22 | void memcpy_fromio(void *to, volatile void __iomem *from, unsigned long count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | { |
| 24 | char *p = to; |
| 25 | while (count) { |
| 26 | count--; |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 27 | *p = readb((void __iomem *)from); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | p++; |
| 29 | from++; |
| 30 | } |
| 31 | } |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 32 | EXPORT_SYMBOL(memcpy_fromio); |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | /* |
| 35 | * Copy data from "real" memory space to IO memory space. |
| 36 | * This needs to be optimized. |
| 37 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 38 | void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | const char *p = from; |
| 41 | while (count) { |
| 42 | count--; |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 43 | writeb(*p, (void __iomem *)to); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | p++; |
| 45 | to++; |
| 46 | } |
| 47 | } |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 48 | EXPORT_SYMBOL(memcpy_toio); |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | /* |
| 51 | * "memset" on IO memory space. |
| 52 | * This needs to be optimized. |
| 53 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 54 | void memset_io(volatile void __iomem *dst, int c, unsigned long count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | { |
| 56 | while (count) { |
| 57 | count--; |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 58 | writeb(c, (void __iomem *)dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | dst++; |
| 60 | } |
| 61 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | EXPORT_SYMBOL(memset_io); |
| 63 | |
Paul Mundt | 05ae915 | 2006-09-27 18:25:24 +0900 | [diff] [blame] | 64 | void __raw_readsl(unsigned long addr, void *datap, int len) |
| 65 | { |
| 66 | u32 *data; |
| 67 | |
| 68 | for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) |
| 69 | *data++ = ctrl_inl(addr); |
| 70 | |
| 71 | if (likely(len >= (0x20 >> 2))) { |
| 72 | int tmp2, tmp3, tmp4, tmp5, tmp6; |
| 73 | |
| 74 | __asm__ __volatile__( |
| 75 | "1: \n\t" |
| 76 | "mov.l @%7, r0 \n\t" |
| 77 | "mov.l @%7, %2 \n\t" |
| 78 | #ifdef CONFIG_CPU_SH4 |
| 79 | "movca.l r0, @%0 \n\t" |
| 80 | #else |
| 81 | "mov.l r0, @%0 \n\t" |
| 82 | #endif |
| 83 | "mov.l @%7, %3 \n\t" |
| 84 | "mov.l @%7, %4 \n\t" |
| 85 | "mov.l @%7, %5 \n\t" |
| 86 | "mov.l @%7, %6 \n\t" |
| 87 | "mov.l @%7, r7 \n\t" |
| 88 | "mov.l @%7, r0 \n\t" |
| 89 | "mov.l %2, @(0x04,%0) \n\t" |
| 90 | "mov #0x20>>2, %2 \n\t" |
| 91 | "mov.l %3, @(0x08,%0) \n\t" |
| 92 | "sub %2, %1 \n\t" |
| 93 | "mov.l %4, @(0x0c,%0) \n\t" |
| 94 | "cmp/hi %1, %2 ! T if 32 > len \n\t" |
| 95 | "mov.l %5, @(0x10,%0) \n\t" |
| 96 | "mov.l %6, @(0x14,%0) \n\t" |
| 97 | "mov.l r7, @(0x18,%0) \n\t" |
| 98 | "mov.l r0, @(0x1c,%0) \n\t" |
| 99 | "bf.s 1b \n\t" |
| 100 | " add #0x20, %0 \n\t" |
| 101 | : "=&r" (data), "=&r" (len), |
| 102 | "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4), |
| 103 | "=&r" (tmp5), "=&r" (tmp6) |
| 104 | : "r"(addr), "0" (data), "1" (len) |
| 105 | : "r0", "r7", "t", "memory"); |
| 106 | } |
| 107 | |
| 108 | for (; len != 0; len--) |
| 109 | *data++ = ctrl_inl(addr); |
| 110 | } |
| 111 | EXPORT_SYMBOL(__raw_readsl); |
| 112 | |
| 113 | void __raw_writesl(unsigned long addr, const void *data, int len) |
| 114 | { |
| 115 | if (likely(len != 0)) { |
| 116 | int tmp1; |
| 117 | |
| 118 | __asm__ __volatile__ ( |
| 119 | "1: \n\t" |
| 120 | "mov.l @%0+, %1 \n\t" |
| 121 | "dt %3 \n\t" |
| 122 | "bf.s 1b \n\t" |
| 123 | " mov.l %1, @%4 \n\t" |
| 124 | : "=&r" (data), "=&r" (tmp1) |
| 125 | : "0" (data), "r" (len), "r"(addr) |
| 126 | : "t", "memory"); |
| 127 | } |
| 128 | } |
| 129 | EXPORT_SYMBOL(__raw_writesl); |
| 130 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 131 | void __iomem *ioport_map(unsigned long port, unsigned int nr) |
| 132 | { |
| 133 | return sh_mv.mv_ioport_map(port, nr); |
| 134 | } |
| 135 | EXPORT_SYMBOL(ioport_map); |
| 136 | |
| 137 | void ioport_unmap(void __iomem *addr) |
| 138 | { |
| 139 | sh_mv.mv_ioport_unmap(addr); |
| 140 | } |
| 141 | EXPORT_SYMBOL(ioport_unmap); |