From 69903d6500c73af8329a5fba7153b0d50748981c Mon Sep 17 00:00:00 2001 From: Thiemo Seufer Date: Wed, 8 Dec 2004 10:32:45 +0000 Subject: Fix typos and formatting. Signed-off-by: Thiemo Seufer Signed-off-by: Ralf Baechle --- arch/mips/lib/csum_partial_copy.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/mips/lib') diff --git a/arch/mips/lib/csum_partial_copy.c b/arch/mips/lib/csum_partial_copy.c index ffed0a6a1c16..2f26ff99c715 100644 --- a/arch/mips/lib/csum_partial_copy.c +++ b/arch/mips/lib/csum_partial_copy.c @@ -16,8 +16,8 @@ /* * copy while checksumming, otherwise like csum_partial */ -unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst, - int len, unsigned int sum) +unsigned int csum_partial_copy_nocheck(const unsigned char *src, + unsigned char *dst, int len, unsigned int sum) { /* * It's 2:30 am and I don't feel like doing it real ... @@ -33,8 +33,8 @@ unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char * * Copy from userspace and compute checksum. If we catch an exception * then zero the rest of the buffer. */ -unsigned int csum_partial_copy_from_user (const unsigned char *src, unsigned char *dst, - int len, unsigned int sum, int *err_ptr) +unsigned int csum_partial_copy_from_user (const unsigned char *src, + unsigned char *dst, int len, unsigned int sum, int *err_ptr) { int missing; -- cgit From fe00f943e0ef98b4057abcc2940d631a975b43cd Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 1 Mar 2005 19:22:29 +0000 Subject: Sparseify MIPS. Signed-off-by: Ralf Baechle --- arch/mips/lib/csum_partial_copy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/mips/lib') diff --git a/arch/mips/lib/csum_partial_copy.c b/arch/mips/lib/csum_partial_copy.c index 2f26ff99c715..6e9f366f961d 100644 --- a/arch/mips/lib/csum_partial_copy.c +++ b/arch/mips/lib/csum_partial_copy.c @@ -33,7 +33,7 @@ unsigned int csum_partial_copy_nocheck(const unsigned char *src, * Copy from userspace and compute checksum. If we catch an exception * then zero the rest of the buffer. */ -unsigned int csum_partial_copy_from_user (const unsigned char *src, +unsigned int csum_partial_copy_from_user (const unsigned char __user *src, unsigned char *dst, int len, unsigned int sum, int *err_ptr) { int missing; -- cgit From ba5187dbb4b2eac99d6fa1d6bbece67e0066bf51 Mon Sep 17 00:00:00 2001 From: Thiemo Seufer Date: Mon, 25 Apr 2005 16:36:23 +0000 Subject: Better interface to run uncached cache setup code. Signed-off-by: Thiemo Seufer Signed-off-by: Ralf Baechle --- arch/mips/lib/Makefile | 4 +-- arch/mips/lib/uncached.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+), 2 deletions(-) create mode 100644 arch/mips/lib/uncached.c (limited to 'arch/mips/lib') diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile index 037303412909..cf12caf80774 100644 --- a/arch/mips/lib/Makefile +++ b/arch/mips/lib/Makefile @@ -2,8 +2,8 @@ # Makefile for MIPS-specific library files.. # -lib-y += csum_partial_copy.o memcpy.o promlib.o \ - strlen_user.o strncpy_user.o strnlen_user.o +lib-y += csum_partial_copy.o memcpy.o promlib.o strlen_user.o strncpy_user.o \ + strnlen_user.o uncached.o obj-y += iomap.o diff --git a/arch/mips/lib/uncached.c b/arch/mips/lib/uncached.c new file mode 100644 index 000000000000..98ce89f8068b --- /dev/null +++ b/arch/mips/lib/uncached.c @@ -0,0 +1,76 @@ +/* + * 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. + * + * Copyright (C) 2005 Thiemo Seufer + * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved. + * Author: Maciej W. Rozycki + */ + +#include + +#include +#include + +#ifndef CKSEG2 +#define CKSEG2 CKSSEG +#endif +#ifndef TO_PHYS_MASK +#define TO_PHYS_MASK -1 +#endif + +/* + * FUNC is executed in one of the uncached segments, depending on its + * original address as follows: + * + * 1. If the original address is in CKSEG0 or CKSEG1, then the uncached + * segment used is CKSEG1. + * 2. If the original address is in XKPHYS, then the uncached segment + * used is XKPHYS(2). + * 3. Otherwise it's a bug. + * + * The same remapping is done with the stack pointer. Stack handling + * works because we don't handle stack arguments or more complex return + * values, so we can avoid sharing the same stack area between a cached + * and the uncached mode. + */ +unsigned long __init run_uncached(void *func) +{ + register long sp __asm__("$sp"); + register long ret __asm__("$2"); + long lfunc = (long)func, ufunc; + long usp; + + if (sp >= (long)CKSEG0 && sp < (long)CKSEG2) + usp = CKSEG1ADDR(sp); + else if ((long long)sp >= (long long)PHYS_TO_XKPHYS(0LL, 0) && + (long long)sp < (long long)PHYS_TO_XKPHYS(8LL, 0)) + usp = PHYS_TO_XKPHYS((long long)K_CALG_UNCACHED, + XKPHYS_TO_PHYS((long long)sp)); + else { + BUG(); + usp = sp; + } + if (lfunc >= (long)CKSEG0 && lfunc < (long)CKSEG2) + ufunc = CKSEG1ADDR(lfunc); + else if ((long long)lfunc >= (long long)PHYS_TO_XKPHYS(0LL, 0) && + (long long)lfunc < (long long)PHYS_TO_XKPHYS(8LL, 0)) + ufunc = PHYS_TO_XKPHYS((long long)K_CALG_UNCACHED, + XKPHYS_TO_PHYS((long long)lfunc)); + else { + BUG(); + ufunc = lfunc; + } + + __asm__ __volatile__ ( + " move $16, $sp\n" + " move $sp, %1\n" + " jalr %2\n" + " move $sp, $16" + : "=r" (ret) + : "r" (usp), "r" (ufunc) + : "$16", "$31"); + + return ret; +} -- cgit From e5adb8770e12169a6595a3ad5682541441bd1052 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 20 Oct 2005 22:55:26 +0100 Subject: Hack to resolve longstanding prefetch issue Prefetching may be fatal on some systems if we're prefetching beyond the end of memory on some systems. It's also a seriously bad idea on non dma-coherent systems. Signed-off-by: Ralf Baechle --- arch/mips/lib/memcpy.S | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'arch/mips/lib') diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S index a78865f76547..7f9aafa4d80e 100644 --- a/arch/mips/lib/memcpy.S +++ b/arch/mips/lib/memcpy.S @@ -13,6 +13,21 @@ * Mnemonic names for arguments to memcpy/__copy_user */ #include + +/* + * Hack to resolve longstanding prefetch issue + * + * Prefetching may be fatal on some systems if we're prefetching beyond the + * end of memory on some systems. It's also a seriously bad idea on non + * dma-coherent systems. + */ +#if !defined(CONFIG_DMA_COHERENT) || !defined(CONFIG_DMA_IP27) +#undef CONFIG_CPU_HAS_PREFETCH +#endif +#ifdef CONFIG_MIPS_MALTA +#undef CONFIG_CPU_HAS_PREFETCH +#endif + #include #include #include -- cgit