78 lines
2.6 KiB
Diff
78 lines
2.6 KiB
Diff
--- a/arch/mips/include/asm/cpu-features.h
|
|
+++ b/arch/mips/include/asm/cpu-features.h
|
|
@@ -110,6 +110,9 @@
|
|
#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
|
|
--- /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 */
|
|
--- a/arch/mips/mm/c-r4k.c
|
|
+++ b/arch/mips/mm/c-r4k.c
|
|
@@ -507,7 +507,7 @@ static inline void local_r4k_flush_cache
|
|
*/
|
|
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);
|
|
@@ -530,7 +530,7 @@ static inline void local_r4k_flush_cache
|
|
}
|
|
|
|
if (vaddr) {
|
|
- if (map_coherent)
|
|
+ if (map_coherent && cpu_use_kmap_coherent)
|
|
kunmap_coherent();
|
|
else
|
|
kunmap_atomic(vaddr, KM_USER0);
|
|
--- a/arch/mips/mm/init.c
|
|
+++ b/arch/mips/mm/init.c
|
|
@@ -210,7 +210,7 @@ void copy_user_highpage(struct page *to,
|
|
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);
|
|
@@ -232,7 +232,7 @@ void copy_to_user_page(struct vm_area_st
|
|
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);
|
|
@@ -250,7 +250,7 @@ void copy_from_user_page(struct vm_area_
|
|
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);
|