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- /* SPDX-License-Identifier: GPL-2.0 */
- #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 */
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