From 9b791d4766c19ac014a7b81a551efe4a7511e12a Mon Sep 17 00:00:00 2001 From: Hirokazu Takata Date: Fri, 6 Jan 2006 00:18:44 -0800 Subject: [PATCH] m32r: Fix M32104 cache flushing routines This patch fixes cache memory parameter setting for the M32104 target. So far, its performance seemed to have been degraded due to incorrect cache parameter setting. * arch/m32r/boot/setup.S: Set SFR(Special Fuction Registers) region to be non-cachable explicitly. * arch/m32r/mm/cache.c: Fix cache flushing routines not to switch off the M32104 cache. Signed-off-by: Hayato Fujiwara Signed-off-by: Hirokazu Takata Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/mm/cache.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) (limited to 'arch/m32r/mm/cache.c') diff --git a/arch/m32r/mm/cache.c b/arch/m32r/mm/cache.c index c6f72a6..9f54dd9 100644 --- a/arch/m32r/mm/cache.c +++ b/arch/m32r/mm/cache.c @@ -1,7 +1,7 @@ /* * linux/arch/m32r/mm/cache.c * - * Copyright (C) 2002 Hirokazu Takata + * Copyright (C) 2002-2005 Hirokazu Takata, Hayato Fujiwara */ #include @@ -9,7 +9,8 @@ #undef MCCR -#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP) +#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) \ + || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP) /* Cache Control Register */ #define MCCR ((volatile unsigned long*)0xfffffffc) #define MCCR_CC (1UL << 7) /* Cache mode modify bit */ @@ -27,7 +28,7 @@ #define MCCR_IIV (1UL << 0) /* I-cache invalidate */ #define MCCR_ICACHE_INV MCCR_IIV #elif defined(CONFIG_CHIP_M32104) -#define MCCR ((volatile unsigned long*)0xfffffffc) +#define MCCR ((volatile unsigned short*)0xfffffffe) #define MCCR_IIV (1UL << 8) /* I-cache invalidate */ #define MCCR_DIV (1UL << 9) /* D-cache invalidate */ #define MCCR_DCB (1UL << 10) /* D-cache copy back */ @@ -36,7 +37,7 @@ #define MCCR_ICACHE_INV MCCR_IIV #define MCCR_DCACHE_CB MCCR_DCB #define MCCR_DCACHE_CBINV (MCCR_DIV|MCCR_DCB) -#endif /* CONFIG_CHIP_XNUX2 || CONFIG_CHIP_M32700 */ +#endif #ifndef MCCR #error Unknown cache type. @@ -47,29 +48,42 @@ void _flush_cache_all(void) { #if defined(CONFIG_CHIP_M32102) + unsigned char mccr; *MCCR = MCCR_ICACHE_INV; +#elif defined(CONFIG_CHIP_M32104) + unsigned short mccr; + + /* Copyback and invalidate D-cache */ + /* Invalidate I-cache */ + *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV); #else unsigned long mccr; /* Copyback and invalidate D-cache */ /* Invalidate I-cache */ *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV; - while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ #endif + while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ } /* Copy back D-cache and invalidate I-cache all */ void _flush_cache_copyback_all(void) { #if defined(CONFIG_CHIP_M32102) + unsigned char mccr; *MCCR = MCCR_ICACHE_INV; +#elif defined(CONFIG_CHIP_M32104) + unsigned short mccr; + + /* Copyback and invalidate D-cache */ + /* Invalidate I-cache */ + *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB); #else unsigned long mccr; /* Copyback D-cache */ /* Invalidate I-cache */ *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB; - while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ - #endif + while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ } -- cgit v1.1