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(const void __iomem *addr, void *datap, int len) 18 { 19 u32 *data; 20 21 for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) 22 *data++ = __raw_readl(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++ = __raw_readl(addr); 63 } 64 EXPORT_SYMBOL(__raw_readsl); 65 66 void __raw_writesl(void __iomem *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); 83