Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[pandora-kernel.git] / arch / sh / include / asm / uncached.h

diff --git a/arch/sh/include/asm/uncached.h b/arch/sh/include/asm/uncached.h
index e3419f9..6f8816b 100644 (file)
--- a/arch/sh/include/asm/uncached.h
+++ b/arch/sh/include/asm/uncached.h
@@ -4,15 +4,55 @@
 #include <linux/bug.h>
 
 #ifdef CONFIG_UNCACHED_MAPPING
+extern unsigned long cached_to_uncached;
+extern unsigned long uncached_size;
 extern unsigned long uncached_start, uncached_end;
 
 extern int virt_addr_uncached(unsigned long kaddr);
 extern void uncached_init(void);
 extern void uncached_resize(unsigned long size);
+
+/*
+ * Jump to uncached area.
+ * When handling TLB or caches, we need to do it from an uncached area.
+ */
+#define jump_to_uncached()                     \
+do {                                           \
+       unsigned long __dummy;                  \
+                                               \
+       __asm__ __volatile__(                   \
+               "mova   1f, %0\n\t"             \
+               "add    %1, %0\n\t"             \
+               "jmp    @%0\n\t"                \
+               " nop\n\t"                      \
+               ".balign 4\n"                   \
+               "1:"                            \
+               : "=&z" (__dummy)               \
+               : "r" (cached_to_uncached));    \
+} while (0)
+
+/*
+ * Back to cached area.
+ */
+#define back_to_cached()                               \
+do {                                                   \
+       unsigned long __dummy;                          \
+       ctrl_barrier();                                 \
+       __asm__ __volatile__(                           \
+               "mov.l  1f, %0\n\t"                     \
+               "jmp    @%0\n\t"                        \
+               " nop\n\t"                              \
+               ".balign 4\n"                           \
+               "1:     .long 2f\n"                     \
+               "2:"                                    \
+               : "=&r" (__dummy));                     \
+} while (0)
 #else
 #define virt_addr_uncached(kaddr)      (0)
 #define uncached_init()                        do { } while (0)
 #define uncached_resize(size)          BUG()
+#define jump_to_uncached()             do { } while (0)
+#define back_to_cached()               do { } while (0)
 #endif
 
 #endif /* __ASM_SH_UNCACHED_H */