Commit 37f2a174 authored by Paul Burton's avatar Paul Burton Committed by Ralf Baechle

MIPS: Introduce API for enabling & disabling L2 prefetch

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: default avatarPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11179/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent c1a0e9bc
...@@ -9,6 +9,7 @@ ...@@ -9,6 +9,7 @@
#ifndef _ASM_BCACHE_H #ifndef _ASM_BCACHE_H
#define _ASM_BCACHE_H #define _ASM_BCACHE_H
#include <linux/types.h>
/* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent, /* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
chipset implemented caches. On machines with other CPUs the CPU does the chipset implemented caches. On machines with other CPUs the CPU does the
...@@ -18,6 +19,9 @@ struct bcache_ops { ...@@ -18,6 +19,9 @@ struct bcache_ops {
void (*bc_disable)(void); void (*bc_disable)(void);
void (*bc_wback_inv)(unsigned long page, unsigned long size); void (*bc_wback_inv)(unsigned long page, unsigned long size);
void (*bc_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); extern void indy_sc_init(void);
...@@ -46,6 +50,26 @@ static inline void bc_inv(unsigned long page, unsigned long size) ...@@ -46,6 +50,26 @@ static inline void bc_inv(unsigned long page, unsigned long size)
bcops->bc_inv(page, 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) */ #else /* !defined(CONFIG_BOARD_SCACHE) */
/* Not R4000 / R4400 / R4600 / R5000. */ /* Not R4000 / R4400 / R4600 / R5000. */
...@@ -54,6 +78,9 @@ static inline void bc_inv(unsigned long page, unsigned long size) ...@@ -54,6 +78,9 @@ static inline void bc_inv(unsigned long page, unsigned long size)
#define bc_disable() do { } while (0) #define bc_disable() do { } while (0)
#define bc_wback_inv(page, size) do { } while (0) #define bc_wback_inv(page, size) do { } while (0)
#define bc_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) */ #endif /* !defined(CONFIG_BOARD_SCACHE) */
......
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