1 files changed, 24 insertions, 5 deletions

diff --git a/arch/sh/include/asm/fixmap.h b/arch/sh/include/asm/fixmap.h
index 721fcc4d5e98..bd7e79a12653 100644
--- a/arch/sh/include/asm/fixmap.h
+++ b/arch/sh/include/asm/fixmap.h
@@ -14,9 +14,9 @@
 #define _ASM_FIXMAP_H
 
 #include <linux/kernel.h>
+#include <linux/threads.h>
 #include <asm/page.h>
 #ifdef CONFIG_HIGHMEM
-#include <linux/threads.h>
 #include <asm/kmap_types.h>
 #endif
 
@@ -46,19 +46,38 @@
  * fix-mapped?
  */
 enum fixed_addresses {
-#define FIX_N_COLOURS 16
+        /*
+         * The FIX_CMAP entries are used by kmap_coherent() to get virtual
+         * addresses which are of a known color, and so their values are
+         * important. __fix_to_virt(FIX_CMAP_END - n) must give an address
+         * which is the same color as a page (n<<PAGE_SHIFT).
+         */
+#define FIX_N_COLOURS 8
         FIX_CMAP_BEGIN,
-        FIX_CMAP_END = FIX_CMAP_BEGIN + FIX_N_COLOURS,
-        FIX_UNCACHED,
+        FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS) - 1,
+
 #ifdef CONFIG_HIGHMEM
         FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
-        FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
+        FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS) - 1,
 #endif
+
+#ifdef CONFIG_IOREMAP_FIXED
+        /*
+         * FIX_IOREMAP entries are useful for mapping physical address
+         * space before ioremap() is useable, e.g. really early in boot
+         * before kmalloc() is working.
+         */
+#define FIX_N_IOREMAPS  32
+        FIX_IOREMAP_BEGIN,
+        FIX_IOREMAP_END = FIX_IOREMAP_BEGIN + FIX_N_IOREMAPS - 1,
+#endif
+
         __end_of_fixed_addresses
 };
 
 extern void __set_fixmap(enum fixed_addresses idx,
                          unsigned long phys, pgprot_t flags);
+extern void __clear_fixmap(enum fixed_addresses idx, pgprot_t flags);
 
 #define set_fixmap(idx, phys) \
                 __set_fixmap(idx, phys, PAGE_KERNEL)