Introduce new functions in struct bcache_ops to enable & disable L2
cache prefetching, and to retrieve the current state of L2 prefetching.
This will be used in later patches.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx>
---
arch/mips/include/asm/bcache.h | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/mips/include/asm/bcache.h b/arch/mips/include/asm/bcache.h
index 8c34484..a00857b 100644
--- a/arch/mips/include/asm/bcache.h
+++ b/arch/mips/include/asm/bcache.h
@@ -9,6 +9,7 @@
#ifndef _ASM_BCACHE_H
#define _ASM_BCACHE_H
+#include <linux/types.h>
/* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
chipset implemented caches. On machines with other CPUs the CPU does the
@@ -18,6 +19,9 @@ struct bcache_ops {
void (*bc_disable)(void);
void (*bc_wback_inv)(unsigned long page, unsigned long size);
void (*bc_inv)(unsigned long page, unsigned long size);
+ void (*bc_prefetch_enable)(void);
+ void (*bc_prefetch_disable)(void);
+ bool (*bc_prefetch_is_enabled)(void);
};
extern void indy_sc_init(void);
@@ -46,6 +50,26 @@ static inline void bc_inv(unsigned long page, unsigned long size)
bcops->bc_inv(page, size);
}
+static inline void bc_prefetch_enable(void)
+{
+ if (bcops->bc_prefetch_enable)
+ bcops->bc_prefetch_enable();
+}
+
+static inline void bc_prefetch_disable(void)
+{
+ if (bcops->bc_prefetch_disable)
+ bcops->bc_prefetch_disable();
+}
+
+static inline bool bc_prefetch_is_enabled(void)
+{
+ if (bcops->bc_prefetch_is_enabled)
+ return bcops->bc_prefetch_is_enabled();
+
+ return false;
+}
+
#else /* !defined(CONFIG_BOARD_SCACHE) */
/* Not R4000 / R4400 / R4600 / R5000. */
@@ -54,6 +78,9 @@ static inline void bc_inv(unsigned long page, unsigned long size)
#define bc_disable() do { } while (0)
#define bc_wback_inv(page, size) do { } while (0)
#define bc_inv(page, size) do { } while (0)
+#define bc_prefetch_enable() do { } while (0)
+#define bc_prefetch_disable() do { } while (0)
+#define bc_prefetch_is_enabled() 0
#endif /* !defined(CONFIG_BOARD_SCACHE) */
--
2.5.3
