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sh: Move sh32 optimized I/O routines to arch/sh/lib/
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Paul Mundt
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Jan 28, 2008
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| /* | ||
| * 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(unsigned long addr, void *datap, int len) | ||
| { | ||
| u32 *data; | ||
|
|
||
| for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--) | ||
| *data++ = ctrl_inl(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++ = ctrl_inl(addr); | ||
| } | ||
| EXPORT_SYMBOL(__raw_readsl); | ||
|
|
||
| void __raw_writesl(unsigned long 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); |