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Diffstat (limited to 'target/linux/brcm47xx/patches-2.6.23/160-kmap_coherent.patch')
-rw-r--r--target/linux/brcm47xx/patches-2.6.23/160-kmap_coherent.patch63
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.23/160-kmap_coherent.patch b/target/linux/brcm47xx/patches-2.6.23/160-kmap_coherent.patch
new file mode 100644
index 0000000000..8a3bd0ec74
--- /dev/null
+++ b/target/linux/brcm47xx/patches-2.6.23/160-kmap_coherent.patch
@@ -0,0 +1,63 @@
+Index: linux-2.6.23/arch/mips/mm/init.c
+===================================================================
+--- linux-2.6.23.orig/arch/mips/mm/init.c 2007-10-09 22:31:38.000000000 +0200
++++ linux-2.6.23/arch/mips/mm/init.c 2007-10-13 02:57:18.483434538 +0200
+@@ -211,7 +211,7 @@
+ void *vfrom, *vto;
+
+ vto = kmap_atomic(to, KM_USER1);
+- if (cpu_has_dc_aliases && !Page_dcache_dirty(from)) {
++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent && !Page_dcache_dirty(from)) {
+ vfrom = kmap_coherent(from, vaddr);
+ copy_page(vto, vfrom);
+ kunmap_coherent();
+@@ -234,7 +234,7 @@
+ struct page *page, unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+ {
+- if (cpu_has_dc_aliases) {
++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent) {
+ void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ memcpy(vto, src, len);
+ kunmap_coherent();
+@@ -250,7 +250,7 @@
+ struct page *page, unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+ {
+- if (cpu_has_dc_aliases) {
++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent) {
+ void *vfrom =
+ kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ memcpy(dst, vfrom, len);
+Index: linux-2.6.23/include/asm-mips/mach-bcm947xx/cpu-feature-overrides.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.23/include/asm-mips/mach-bcm947xx/cpu-feature-overrides.h 2007-10-13 02:56:22.020216880 +0200
+@@ -0,0 +1,13 @@
++/*
++ * 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 Ralf Baechle (ralf@linux-mips.org)
++ */
++#ifndef __ASM_MACH_BCM947XX_CPU_FEATURE_OVERRIDES_H
++#define __ASM_MACH_BCM947XX_CPU_FEATURE_OVERRIDES_H
++
++#define cpu_use_kmap_coherent 0
++
++#endif /* __ASM_MACH_BCM947XX_CPU_FEATURE_OVERRIDES_H */
+Index: linux-2.6.23/include/asm-mips/cpu-features.h
+===================================================================
+--- linux-2.6.23.orig/include/asm-mips/cpu-features.h 2007-10-09 22:31:38.000000000 +0200
++++ linux-2.6.23/include/asm-mips/cpu-features.h 2007-10-13 02:56:22.028217337 +0200
+@@ -101,6 +101,9 @@
+ #ifndef cpu_has_pindexed_dcache
+ #define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
+ #endif
++#ifndef cpu_use_kmap_coherent
++#define cpu_use_kmap_coherent 1
++#endif
+
+ /*
+ * I-Cache snoops remote store. This only matters on SMP. Some multiprocessors