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authorHirokazu Takata <takata@linux-m32r.org>2006-01-06 00:18:44 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:44 -0800
commit9b791d4766c19ac014a7b81a551efe4a7511e12a (patch)
treeac8aaaf5042fb0e6f9cd05e073f7e5d60823445f
parent46ea178b7a5162405bf70954d769165cf2161309 (diff)
downloadlinux-linaro-stable-9b791d4766c19ac014a7b81a551efe4a7511e12a.tar.gz
[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 <fujiwara@linux-m32r.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/m32r/boot/setup.S15
-rw-r--r--arch/m32r/mm/cache.c28
2 files changed, 33 insertions, 10 deletions
diff --git a/arch/m32r/boot/setup.S b/arch/m32r/boot/setup.S
index 742669fab8a9..398542507d84 100644
--- a/arch/m32r/boot/setup.S
+++ b/arch/m32r/boot/setup.S
@@ -1,11 +1,10 @@
/*
* linux/arch/m32r/boot/setup.S -- A setup code.
*
- * Copyright (C) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata,
- * and Hitoshi Yamamoto
+ * Copyright (C) 2001-2005 Hiroyuki Kondo, Hirokazu Takata,
+ * Hitoshi Yamamoto, Hayato Fujiwara
*
*/
-/* $Id$ */
#include <linux/linkage.h>
#include <asm/segment.h>
@@ -81,6 +80,16 @@ ENTRY(boot)
; ldi r1, #0x00 ; cache off
st r1, @r0
#elif defined(CONFIG_CHIP_M32104)
+ ldi r0, #-96 ; DNCR0
+ seth r1, #0x0060 ; from 0x00600000
+ or3 r1, r1, #0x0005 ; size 2MB
+ st r1, @r0
+ seth r1, #0x0100 ; from 0x01000000
+ or3 r1, r1, #0x0003 ; size 16MB
+ st r1, @+r0
+ seth r1, #0x0200 ; from 0x02000000
+ or3 r1, r1, #0x0002 ; size 32MB
+ st r1, @+r0
ldi r0, #-4 ;LDIMM (r0, M32R_MCCR)
ldi r1, #0x703 ; cache on (with invalidation)
st r1, @r0
diff --git a/arch/m32r/mm/cache.c b/arch/m32r/mm/cache.c
index c6f72a64ae12..9f54dd937013 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 <linux/config.h>
@@ -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... */
}