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#ifndef __ASM_SH_UNCACHED_H
#define __ASM_SH_UNCACHED_H
#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 */