diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-2.6.28/160-kmap_coherent.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-2.6.28/160-kmap_coherent.patch | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.28/160-kmap_coherent.patch b/target/linux/brcm47xx/patches-2.6.28/160-kmap_coherent.patch new file mode 100644 index 0000000000..383aabf17d --- /dev/null +++ b/target/linux/brcm47xx/patches-2.6.28/160-kmap_coherent.patch @@ -0,0 +1,81 @@ +diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h +--- a/arch/mips/include/asm/cpu-features.h ++++ b/arch/mips/include/asm/cpu-features.h +@@ -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 +diff --git a/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h b/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h +--- /dev/null ++++ b/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h +@@ -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_BCM47XX_CPU_FEATURE_OVERRIDES_H ++#define __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H ++ ++#define cpu_use_kmap_coherent 0 ++ ++#endif /* __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H */ +diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c +--- a/arch/mips/mm/c-r4k.c ++++ b/arch/mips/mm/c-r4k.c +@@ -494,7 +494,7 @@ static inline void local_r4k_flush_cache_page(void *args) + */ + map_coherent = (cpu_has_dc_aliases && + page_mapped(page) && !Page_dcache_dirty(page)); +- if (map_coherent) ++ if (map_coherent && cpu_use_kmap_coherent) + vaddr = kmap_coherent(page, addr); + else + vaddr = kmap_atomic(page, KM_USER0); +@@ -517,7 +517,7 @@ static inline void local_r4k_flush_cache_page(void *args) + } + + if (vaddr) { +- if (map_coherent) ++ if (map_coherent && cpu_use_kmap_coherent) + kunmap_coherent(); + else + kunmap_atomic(vaddr, KM_USER0); +diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c +--- a/arch/mips/mm/init.c ++++ b/arch/mips/mm/init.c +@@ -212,7 +212,7 @@ void copy_user_highpage(struct page *to, struct page *from, + void *vfrom, *vto; + + vto = kmap_atomic(to, KM_USER1); +- if (cpu_has_dc_aliases && ++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent && + page_mapped(from) && !Page_dcache_dirty(from)) { + vfrom = kmap_coherent(from, vaddr); + copy_page(vto, vfrom); +@@ -234,7 +234,7 @@ void copy_to_user_page(struct vm_area_struct *vma, + 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 && + page_mapped(page) && !Page_dcache_dirty(page)) { + void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); + memcpy(vto, src, len); +@@ -252,7 +252,7 @@ void copy_from_user_page(struct vm_area_struct *vma, + 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 && + page_mapped(page) && !Page_dcache_dirty(page)) { + void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); + memcpy(dst, vfrom, len); |