| Paul Mundt | 62d6b66 | 2007-11-09 14:06:24 +0900 | [diff] [blame] | 1 | /* |
| 2 | * arch/sh/lib/io.c - SH32 optimized I/O routines |
| 3 | * |
| 4 | * Copyright (C) 2000 Stuart Menefy |
| 5 | * Copyright (C) 2005 Paul Mundt |
| 6 | * |
| 7 | * Provide real functions which expand to whatever the header file defined. |
| 8 | * Also definitions of machine independent IO functions. |
| 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. |
| 13 | */ |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/io.h> |
| 16 | |
| 17 | void __raw_readsl(unsigned long addr, void *datap, int len) |
| 18 | { |
| 19 | u32 *data; |
| 20 | |
| 21 | for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) |
| 22 | *data++ = ctrl_inl(addr); |
| 23 | |
| 24 | if (likely(len >= (0x20 >> 2))) { |
| 25 | int tmp2, tmp3, tmp4, tmp5, tmp6; |
| 26 | |
| 27 | __asm__ __volatile__( |
| 28 | "1: \n\t" |
| 29 | "mov.l @%7, r0 \n\t" |
| 30 | "mov.l @%7, %2 \n\t" |
| 31 | #ifdef CONFIG_CPU_SH4 |
| 32 | "movca.l r0, @%0 \n\t" |
| 33 | #else |
| 34 | "mov.l r0, @%0 \n\t" |
| 35 | #endif |
| 36 | "mov.l @%7, %3 \n\t" |
| 37 | "mov.l @%7, %4 \n\t" |
| 38 | "mov.l @%7, %5 \n\t" |
| 39 | "mov.l @%7, %6 \n\t" |
| 40 | "mov.l @%7, r7 \n\t" |
| 41 | "mov.l @%7, r0 \n\t" |
| 42 | "mov.l %2, @(0x04,%0) \n\t" |
| 43 | "mov #0x20>>2, %2 \n\t" |
| 44 | "mov.l %3, @(0x08,%0) \n\t" |
| 45 | "sub %2, %1 \n\t" |
| 46 | "mov.l %4, @(0x0c,%0) \n\t" |
| 47 | "cmp/hi %1, %2 ! T if 32 > len \n\t" |
| 48 | "mov.l %5, @(0x10,%0) \n\t" |
| 49 | "mov.l %6, @(0x14,%0) \n\t" |
| 50 | "mov.l r7, @(0x18,%0) \n\t" |
| 51 | "mov.l r0, @(0x1c,%0) \n\t" |
| 52 | "bf.s 1b \n\t" |
| 53 | " add #0x20, %0 \n\t" |
| 54 | : "=&r" (data), "=&r" (len), |
| 55 | "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4), |
| 56 | "=&r" (tmp5), "=&r" (tmp6) |
| 57 | : "r"(addr), "0" (data), "1" (len) |
| 58 | : "r0", "r7", "t", "memory"); |
| 59 | } |
| 60 | |
| 61 | for (; len != 0; len--) |
| 62 | *data++ = ctrl_inl(addr); |
| 63 | } |
| 64 | EXPORT_SYMBOL(__raw_readsl); |
| 65 | |
| 66 | void __raw_writesl(unsigned long addr, const void *data, int len) |
| 67 | { |
| 68 | if (likely(len != 0)) { |
| 69 | int tmp1; |
| 70 | |
| 71 | __asm__ __volatile__ ( |
| 72 | "1: \n\t" |
| 73 | "mov.l @%0+, %1 \n\t" |
| 74 | "dt %3 \n\t" |
| 75 | "bf.s 1b \n\t" |
| 76 | " mov.l %1, @%4 \n\t" |
| 77 | : "=&r" (data), "=&r" (tmp1) |
| 78 | : "0" (data), "r" (len), "r"(addr) |
| 79 | : "t", "memory"); |
| 80 | } |
| 81 | } |
| 82 | EXPORT_SYMBOL(__raw_writesl); |