From 62d6b66edc68f906138df7ba01efd41a45981586 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 9 Nov 2007 14:06:24 +0900 Subject: sh: Move sh32 optimized I/O routines to arch/sh/lib/ Signed-off-by: Paul Mundt --- arch/sh/lib/Makefile | 2 +- arch/sh/lib/io.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 arch/sh/lib/io.c (limited to 'arch/sh/lib') diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile index 9dc7b6985052..6f7ac9eeb54f 100644 --- a/arch/sh/lib/Makefile +++ b/arch/sh/lib/Makefile @@ -2,7 +2,7 @@ # Makefile for SuperH-specific library files.. # -lib-y = delay.o memset.o memmove.o memchr.o \ +lib-y = delay.o io.o memset.o memmove.o memchr.o \ checksum.o strlen.o div64.o div64-generic.o memcpy-y := memcpy.o diff --git a/arch/sh/lib/io.c b/arch/sh/lib/io.c new file mode 100644 index 000000000000..4f54ec43516f --- /dev/null +++ b/arch/sh/lib/io.c @@ -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 +#include + +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); -- cgit v1.2.3