1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * arch/sh/lib/io.c - SH32 optimized I/O routines 4 * 5 * Copyright (C) 2000 Stuart Menefy 6 * Copyright (C) 2005 Paul Mundt 7 * 8 * Provide real functions which expand to whatever the header file defined. 9 * Also definitions of machine independent IO functions. 10 */ 11 #include <linux/module.h> 12 #include <linux/io.h> 13 14 void __raw_readsl(const void __iomem *addr, void *datap, int len) 15 { 16 u32 *data; 17 18 for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) 19 *data++ = __raw_readl(addr); 20 21 if (likely(len >= (0x20 >> 2))) { 22 int tmp2, tmp3, tmp4, tmp5, tmp6; 23 24 __asm__ __volatile__( 25 "1: \n\t" 26 "mov.l @%7, r0 \n\t" 27 "mov.l @%7, %2 \n\t" 28 #ifdef CONFIG_CPU_SH4 29 "movca.l r0, @%0 \n\t" 30 #else 31 "mov.l r0, @%0 \n\t" 32 #endif 33 "mov.l @%7, %3 \n\t" 34 "mov.l @%7, %4 \n\t" 35 "mov.l @%7, %5 \n\t" 36 "mov.l @%7, %6 \n\t" 37 "mov.l @%7, r7 \n\t" 38 "mov.l @%7, r0 \n\t" 39 "mov.l %2, @(0x04,%0) \n\t" 40 "mov #0x20>>2, %2 \n\t" 41 "mov.l %3, @(0x08,%0) \n\t" 42 "sub %2, %1 \n\t" 43 "mov.l %4, @(0x0c,%0) \n\t" 44 "cmp/hi %1, %2 ! T if 32 > len \n\t" 45 "mov.l %5, @(0x10,%0) \n\t" 46 "mov.l %6, @(0x14,%0) \n\t" 47 "mov.l r7, @(0x18,%0) \n\t" 48 "mov.l r0, @(0x1c,%0) \n\t" 49 "bf.s 1b \n\t" 50 " add #0x20, %0 \n\t" 51 : "=&r" (data), "=&r" (len), 52 "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4), 53 "=&r" (tmp5), "=&r" (tmp6) 54 : "r"(addr), "0" (data), "1" (len) 55 : "r0", "r7", "t", "memory"); 56 } 57 58 for (; len != 0; len--) 59 *data++ = __raw_readl(addr); 60 } 61 EXPORT_SYMBOL(__raw_readsl); 62 63 void __raw_writesl(void __iomem *addr, const void *data, int len) 64 { 65 if (likely(len != 0)) { 66 int tmp1; 67 68 __asm__ __volatile__ ( 69 "1: \n\t" 70 "mov.l @%0+, %1 \n\t" 71 "dt %3 \n\t" 72 "bf.s 1b \n\t" 73 " mov.l %1, @%4 \n\t" 74 : "=&r" (data), "=&r" (tmp1) 75 : "0" (data), "r" (len), "r"(addr) 76 : "t", "memory"); 77 } 78 } 79 EXPORT_SYMBOL(__raw_writesl); 80