| /* |
| * arch/sh/lib/io.c - SH32 optimized I/O routines |
| * |
| * Copyright (C) 2000 Stuart Menefy |
| * Copyright (C) 2005 Paul Mundt |
| * |
| * Provide real functions which expand to whatever the header file defined. |
| * Also definitions of machine independent IO functions. |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| #include <linux/module.h> |
| #include <linux/io.h> |
| |
| void __raw_readsl(const void __iomem *addr, void *datap, int len) |
| { |
| u32 *data; |
| |
| for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) |
| *data++ = __raw_readl(addr); |
| |
| if (likely(len >= (0x20 >> 2))) { |
| int tmp2, tmp3, tmp4, tmp5, tmp6; |
| |
| __asm__ __volatile__( |
| "1: \n\t" |
| "mov.l @%7, r0 \n\t" |
| "mov.l @%7, %2 \n\t" |
| #ifdef CONFIG_CPU_SH4 |
| "movca.l r0, @%0 \n\t" |
| #else |
| "mov.l r0, @%0 \n\t" |
| #endif |
| "mov.l @%7, %3 \n\t" |
| "mov.l @%7, %4 \n\t" |
| "mov.l @%7, %5 \n\t" |
| "mov.l @%7, %6 \n\t" |
| "mov.l @%7, r7 \n\t" |
| "mov.l @%7, r0 \n\t" |
| "mov.l %2, @(0x04,%0) \n\t" |
| "mov #0x20>>2, %2 \n\t" |
| "mov.l %3, @(0x08,%0) \n\t" |
| "sub %2, %1 \n\t" |
| "mov.l %4, @(0x0c,%0) \n\t" |
| "cmp/hi %1, %2 ! T if 32 > len \n\t" |
| "mov.l %5, @(0x10,%0) \n\t" |
| "mov.l %6, @(0x14,%0) \n\t" |
| "mov.l r7, @(0x18,%0) \n\t" |
| "mov.l r0, @(0x1c,%0) \n\t" |
| "bf.s 1b \n\t" |
| " add #0x20, %0 \n\t" |
| : "=&r" (data), "=&r" (len), |
| "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4), |
| "=&r" (tmp5), "=&r" (tmp6) |
| : "r"(addr), "0" (data), "1" (len) |
| : "r0", "r7", "t", "memory"); |
| } |
| |
| for (; len != 0; len--) |
| *data++ = __raw_readl(addr); |
| } |
| EXPORT_SYMBOL(__raw_readsl); |
| |
| void __raw_writesl(void __iomem *addr, const void *data, int len) |
| { |
| if (likely(len != 0)) { |
| int tmp1; |
| |
| __asm__ __volatile__ ( |
| "1: \n\t" |
| "mov.l @%0+, %1 \n\t" |
| "dt %3 \n\t" |
| "bf.s 1b \n\t" |
| " mov.l %1, @%4 \n\t" |
| : "=&r" (data), "=&r" (tmp1) |
| : "0" (data), "r" (len), "r"(addr) |
| : "t", "memory"); |
| } |
| } |
| EXPORT_SYMBOL(__raw_writesl); |