This patch fixes I-cache invalidation operation for M32102 chip, which is one of m32r MMU-less targets.
Before this fix, the m32r kernel for M32102 chip missed I-cache invalidation operation and switched off I-cache unintentionally. This bug caused awful performance degradation. Signed-off-by: Mamoru Sakugawa <[EMAIL PROTECTED]> Signed-off-by: Hirokazu Takata <[EMAIL PROTECTED]> --- diff -ruNp a/arch/m32r/mm/cache.c b/arch/m32r/mm/cache.c --- a/arch/m32r/mm/cache.c 2004-12-25 06:35:50.000000000 +0900 +++ b/arch/m32r/mm/cache.c 2005-03-10 21:43:07.708321535 +0900 @@ -4,8 +4,6 @@ * Copyright (C) 2002 Hirokazu Takata */ -/* $Id$ */ - #include <linux/config.h> #include <asm/pgtable.h> @@ -25,8 +23,8 @@ #define MCCR_DCACHE_CBINV (MCCR_CC|MCCR_DIV|MCCR_DCB) #define CHECK_MCCR(mccr) (mccr = *MCCR) #elif defined(CONFIG_CHIP_M32102) -#define MCCR ((volatile unsigned long*)0xfffffffc) -#define MCCR_IIV (1UL << 8) /* I-cache invalidate */ +#define MCCR ((volatile unsigned char*)0xfffffffe) +#define MCCR_IIV (1UL << 0) /* I-cache invalidate */ #define MCCR_ICACHE_INV MCCR_IIV #endif /* CONFIG_CHIP_XNUX2 || CONFIG_CHIP_M32700 */ @@ -65,4 +63,3 @@ void _flush_cache_copyback_all(void) #endif } - -- Hirokazu Takata <[EMAIL PROTECTED]> Linux/M32R Project: http://www.linux-m32r.org/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
