lkml.org 
[lkml]   [2010]   [Oct]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 20/43] MN10300: SMP: Differentiate local cache flushing
From
Date
From: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>

Differentiate local cache flushing from global cache flushing so that they can
be done differently on SMP systems.

Rename the cache functions from:

mn10300_[id]cache_*()

to:

mn10300_[id]_localcache_*()

and on a UP system, assign the global labels to the local labels.

Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
---
arch/mn10300/include/asm/cacheflush.h | 50 ++++++
arch/mn10300/mm/cache-flush-by-tag.S | 143 +++++++++++-----
arch/mn10300/mm/cache-inv-by-tag.S | 199 ++++++++++++++--------
arch/mn10300/proc-mn103e010/include/proc/cache.h | 9 +
4 files changed, 289 insertions(+), 112 deletions(-)

diff --git a/arch/mn10300/include/asm/cacheflush.h b/arch/mn10300/include/asm/cacheflush.h
index a9f4168..748143f 100644
--- a/arch/mn10300/include/asm/cacheflush.h
+++ b/arch/mn10300/include/asm/cacheflush.h
@@ -20,12 +20,31 @@
* Primitive routines
*/
#ifdef CONFIG_MN10300_CACHE_ENABLED
+extern void mn10300_local_icache_inv(void);
+extern void mn10300_local_icache_inv_page(unsigned long start);
+extern void mn10300_local_icache_inv_range(unsigned long start, unsigned long end);
+extern void mn10300_local_icache_inv_range2(unsigned long start, unsigned long size);
+extern void mn10300_local_dcache_inv(void);
+extern void mn10300_local_dcache_inv_page(unsigned long start);
+extern void mn10300_local_dcache_inv_range(unsigned long start, unsigned long end);
+extern void mn10300_local_dcache_inv_range2(unsigned long start, unsigned long size);
extern void mn10300_icache_inv(void);
+extern void mn10300_icache_inv_page(unsigned long start);
+extern void mn10300_icache_inv_range(unsigned long start, unsigned long end);
+extern void mn10300_icache_inv_range2(unsigned long start, unsigned long size);
extern void mn10300_dcache_inv(void);
extern void mn10300_dcache_inv_page(unsigned long start);
extern void mn10300_dcache_inv_range(unsigned long start, unsigned long end);
extern void mn10300_dcache_inv_range2(unsigned long start, unsigned long size);
#ifdef CONFIG_MN10300_CACHE_WBACK
+extern void mn10300_local_dcache_flush(void);
+extern void mn10300_local_dcache_flush_page(unsigned long start);
+extern void mn10300_local_dcache_flush_range(unsigned long start, unsigned long end);
+extern void mn10300_local_dcache_flush_range2(unsigned long start, unsigned long size);
+extern void mn10300_local_dcache_flush_inv(void);
+extern void mn10300_local_dcache_flush_inv_page(unsigned long start);
+extern void mn10300_local_dcache_flush_inv_range(unsigned long start, unsigned long end);
+extern void mn10300_local_dcache_flush_inv_range2(unsigned long start, unsigned long size);
extern void mn10300_dcache_flush(void);
extern void mn10300_dcache_flush_page(unsigned long start);
extern void mn10300_dcache_flush_range(unsigned long start, unsigned long end);
@@ -35,6 +54,18 @@ extern void mn10300_dcache_flush_inv_page(unsigned long start);
extern void mn10300_dcache_flush_inv_range(unsigned long start, unsigned long end);
extern void mn10300_dcache_flush_inv_range2(unsigned long start, unsigned long size);
#else
+#define mn10300_local_dcache_flush() do {} while (0)
+#define mn10300_local_dcache_flush_page(start) do {} while (0)
+#define mn10300_local_dcache_flush_range(start, end) do {} while (0)
+#define mn10300_local_dcache_flush_range2(start, size) do {} while (0)
+#define mn10300_local_dcache_flush_inv() \
+ mn10300_local_dcache_inv()
+#define mn10300_local_dcache_flush_inv_page(start) \
+ mn10300_local_dcache_inv_page(start)
+#define mn10300_local_dcache_flush_inv_range(start, end) \
+ mn10300_local_dcache_inv_range(start, end)
+#define mn10300_local_dcache_flush_inv_range2(start, size) \
+ mn10300_local_dcache_inv_range2(start, size)
#define mn10300_dcache_flush() do {} while (0)
#define mn10300_dcache_flush_page(start) do {} while (0)
#define mn10300_dcache_flush_range(start, end) do {} while (0)
@@ -48,7 +79,26 @@ extern void mn10300_dcache_flush_inv_range2(unsigned long start, unsigned long s
mn10300_dcache_inv_range2((start), (size))
#endif /* CONFIG_MN10300_CACHE_WBACK */
#else
+#define mn10300_local_icache_inv() do {} while (0)
+#define mn10300_local_icache_inv_page(start) do {} while (0)
+#define mn10300_local_icache_inv_range(start, end) do {} while (0)
+#define mn10300_local_icache_inv_range2(start, size) do {} while (0)
+#define mn10300_local_dcache_inv() do {} while (0)
+#define mn10300_local_dcache_inv_page(start) do {} while (0)
+#define mn10300_local_dcache_inv_range(start, end) do {} while (0)
+#define mn10300_local_dcache_inv_range2(start, size) do {} while (0)
+#define mn10300_local_dcache_flush() do {} while (0)
+#define mn10300_local_dcache_flush_inv_page(start) do {} while (0)
+#define mn10300_local_dcache_flush_inv() do {} while (0)
+#define mn10300_local_dcache_flush_inv_range(start, end)do {} while (0)
+#define mn10300_local_dcache_flush_inv_range2(start, size) do {} while (0)
+#define mn10300_local_dcache_flush_page(start) do {} while (0)
+#define mn10300_local_dcache_flush_range(start, end) do {} while (0)
+#define mn10300_local_dcache_flush_range2(start, size) do {} while (0)
#define mn10300_icache_inv() do {} while (0)
+#define mn10300_icache_inv_page(start) do {} while (0)
+#define mn10300_icache_inv_range(start, end) do {} while (0)
+#define mn10300_icache_inv_range2(start, size) do {} while (0)
#define mn10300_dcache_inv() do {} while (0)
#define mn10300_dcache_inv_page(start) do {} while (0)
#define mn10300_dcache_inv_range(start, end) do {} while (0)
diff --git a/arch/mn10300/mm/cache-flush-by-tag.S b/arch/mn10300/mm/cache-flush-by-tag.S
index 8fe90e4..5cd6a27 100644
--- a/arch/mn10300/mm/cache-flush-by-tag.S
+++ b/arch/mn10300/mm/cache-flush-by-tag.S
@@ -1,4 +1,4 @@
-/* MN10300 CPU core caching routines
+/* MN10300 CPU core caching routines, using direct tag flushing
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -14,8 +14,11 @@
#include <asm/smp.h>
#include <asm/page.h>
#include <asm/cache.h>
+#include <asm/irqflags.h>

.am33_2
+
+#ifndef CONFIG_SMP
.globl mn10300_dcache_flush
.globl mn10300_dcache_flush_page
.globl mn10300_dcache_flush_range
@@ -25,17 +28,30 @@
.globl mn10300_dcache_flush_inv_range
.globl mn10300_dcache_flush_inv_range2

+mn10300_dcache_flush = mn10300_local_dcache_flush
+mn10300_dcache_flush_page = mn10300_local_dcache_flush_page
+mn10300_dcache_flush_range = mn10300_local_dcache_flush_range
+mn10300_dcache_flush_range2 = mn10300_local_dcache_flush_range2
+mn10300_dcache_flush_inv = mn10300_local_dcache_flush_inv
+mn10300_dcache_flush_inv_page = mn10300_local_dcache_flush_inv_page
+mn10300_dcache_flush_inv_range = mn10300_local_dcache_flush_inv_range
+mn10300_dcache_flush_inv_range2 = mn10300_local_dcache_flush_inv_range2
+
+#endif /* !CONFIG_SMP */
+
###############################################################################
#
-# void mn10300_dcache_flush(void)
+# void mn10300_local_dcache_flush(void)
# Flush the entire data cache back to RAM
#
###############################################################################
ALIGN
-mn10300_dcache_flush:
+ .globl mn10300_local_dcache_flush
+ .type mn10300_local_dcache_flush,@function
+mn10300_local_dcache_flush:
movhu (CHCTR),d0
btst CHCTR_DCEN,d0
- beq mn10300_dcache_flush_end
+ beq mn10300_local_dcache_flush_end

# read the addresses tagged in the cache's tag RAM and attempt to flush
# those addresses specifically
@@ -44,41 +60,56 @@ mn10300_dcache_flush:
mov DCACHE_PURGE(0,0),a1 # dcache purge request address
mov L1_CACHE_NWAYS*L1_CACHE_NENTRIES,d1 # total number of entries

-mn10300_dcache_flush_loop:
+mn10300_local_dcache_flush_loop:
mov (a0),d0
and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d0
or L1_CACHE_TAG_VALID,d0 # retain valid entries in the
# cache
mov d0,(a1) # conditional purge

-mn10300_dcache_flush_skip:
add L1_CACHE_BYTES,a0
add L1_CACHE_BYTES,a1
add -1,d1
- bne mn10300_dcache_flush_loop
+ bne mn10300_local_dcache_flush_loop

-mn10300_dcache_flush_end:
+mn10300_local_dcache_flush_end:
ret [],0
+ .size mn10300_local_dcache_flush,.-mn10300_local_dcache_flush

###############################################################################
#
-# void mn10300_dcache_flush_page(unsigned long start)
-# void mn10300_dcache_flush_range(unsigned long start, unsigned long end)
-# void mn10300_dcache_flush_range2(unsigned long start, unsigned long size)
+# void mn10300_local_dcache_flush_page(unsigned long start)
+# void mn10300_local_dcache_flush_range(unsigned long start, unsigned long end)
+# void mn10300_local_dcache_flush_range2(unsigned long start, unsigned long size)
# Flush a range of addresses on a page in the dcache
#
###############################################################################
ALIGN
-mn10300_dcache_flush_page:
+ .globl mn10300_local_dcache_flush_page
+ .globl mn10300_local_dcache_flush_range
+ .globl mn10300_local_dcache_flush_range2
+ .type mn10300_local_dcache_flush_page,@function
+ .type mn10300_local_dcache_flush_range,@function
+ .type mn10300_local_dcache_flush_range2,@function
+mn10300_local_dcache_flush_page:
+ and ~(PAGE_SIZE-1),d0
mov PAGE_SIZE,d1
-mn10300_dcache_flush_range2:
+mn10300_local_dcache_flush_range2:
add d0,d1
-mn10300_dcache_flush_range:
- movm [d2,d3],(sp)
+mn10300_local_dcache_flush_range:
+ movm [d2],(sp)

movhu (CHCTR),d2
btst CHCTR_DCEN,d2
- beq mn10300_dcache_flush_range_end
+ beq mn10300_local_dcache_flush_range_end
+
+ sub d0,d1,a0
+ cmp MN10300_DCACHE_FLUSH_BORDER,a0
+ ble 1f
+
+ movm (sp),[d2]
+ bra mn10300_local_dcache_flush
+1:

# round start addr down
and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d0
@@ -101,7 +132,7 @@ mn10300_dcache_flush_range:
or L1_CACHE_TAG_VALID,a1 # retain valid entries in the
# cache

-mn10300_dcache_flush_range_loop:
+mn10300_local_dcache_flush_range_loop:
mov a1,(L1_CACHE_WAYDISP*0,a0) # conditionally purge this line
# all ways

@@ -109,55 +140,80 @@ mn10300_dcache_flush_range_loop:
add L1_CACHE_BYTES,a1
and ~L1_CACHE_WAYDISP,a0 # make sure way stay on way 0
add -1,d1
- bne mn10300_dcache_flush_range_loop
+ bne mn10300_local_dcache_flush_range_loop
+
+mn10300_local_dcache_flush_range_end:
+ ret [d2],4

-mn10300_dcache_flush_range_end:
- ret [d2,d3],8
+ .size mn10300_local_dcache_flush_page,.-mn10300_local_dcache_flush_page
+ .size mn10300_local_dcache_flush_range,.-mn10300_local_dcache_flush_range
+ .size mn10300_local_dcache_flush_range2,.-mn10300_local_dcache_flush_range2

###############################################################################
#
-# void mn10300_dcache_flush_inv(void)
+# void mn10300_local_dcache_flush_inv(void)
# Flush the entire data cache and invalidate all entries
#
###############################################################################
ALIGN
-mn10300_dcache_flush_inv:
+ .globl mn10300_local_dcache_flush_inv
+ .type mn10300_local_dcache_flush_inv,@function
+mn10300_local_dcache_flush_inv:
movhu (CHCTR),d0
btst CHCTR_DCEN,d0
- beq mn10300_dcache_flush_inv_end
+ beq mn10300_local_dcache_flush_inv_end

- # hit each line in the dcache with an unconditional purge
- mov DCACHE_PURGE(0,0),a1 # dcache purge request address
- mov L1_CACHE_NWAYS*L1_CACHE_NENTRIES,d1 # total number of entries
+ mov L1_CACHE_NENTRIES,d1
+ clr a1

-mn10300_dcache_flush_inv_loop:
- mov (a1),d0 # unconditional purge
+mn10300_local_dcache_flush_inv_loop:
+ mov (DCACHE_PURGE_WAY0(0),a1),d0 # unconditional purge
+ mov (DCACHE_PURGE_WAY1(0),a1),d0 # unconditional purge
+ mov (DCACHE_PURGE_WAY2(0),a1),d0 # unconditional purge
+ mov (DCACHE_PURGE_WAY3(0),a1),d0 # unconditional purge

add L1_CACHE_BYTES,a1
add -1,d1
- bne mn10300_dcache_flush_inv_loop
+ bne mn10300_local_dcache_flush_inv_loop

-mn10300_dcache_flush_inv_end:
+mn10300_local_dcache_flush_inv_end:
ret [],0
+ .size mn10300_local_dcache_flush_inv,.-mn10300_local_dcache_flush_inv

###############################################################################
#
-# void mn10300_dcache_flush_inv_page(unsigned long start)
-# void mn10300_dcache_flush_inv_range(unsigned long start, unsigned long end)
-# void mn10300_dcache_flush_inv_range2(unsigned long start, unsigned long size)
+# void mn10300_local_dcache_flush_inv_page(unsigned long start)
+# void mn10300_local_dcache_flush_inv_range(unsigned long start, unsigned long end)
+# void mn10300_local_dcache_flush_inv_range2(unsigned long start, unsigned long size)
# Flush and invalidate a range of addresses on a page in the dcache
#
###############################################################################
ALIGN
-mn10300_dcache_flush_inv_page:
+ .globl mn10300_local_dcache_flush_inv_page
+ .globl mn10300_local_dcache_flush_inv_range
+ .globl mn10300_local_dcache_flush_inv_range2
+ .type mn10300_local_dcache_flush_inv_page,@function
+ .type mn10300_local_dcache_flush_inv_range,@function
+ .type mn10300_local_dcache_flush_inv_range2,@function
+mn10300_local_dcache_flush_inv_page:
+ and ~(PAGE_SIZE-1),d0
mov PAGE_SIZE,d1
-mn10300_dcache_flush_inv_range2:
+mn10300_local_dcache_flush_inv_range2:
add d0,d1
-mn10300_dcache_flush_inv_range:
- movm [d2,d3],(sp)
+mn10300_local_dcache_flush_inv_range:
+ movm [d2],(sp)
+
movhu (CHCTR),d2
btst CHCTR_DCEN,d2
- beq mn10300_dcache_flush_inv_range_end
+ beq mn10300_local_dcache_flush_inv_range_end
+
+ sub d0,d1,a0
+ cmp MN10300_DCACHE_FLUSH_INV_BORDER,a0
+ ble 1f
+
+ movm (sp),[d2]
+ bra mn10300_local_dcache_flush_inv
+1:

and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d0 # round start
# addr down
@@ -178,7 +234,7 @@ mn10300_dcache_flush_inv_range:
lsr L1_CACHE_SHIFT,d1 # total number of entries to
# examine

-mn10300_dcache_flush_inv_range_loop:
+mn10300_local_dcache_flush_inv_range_loop:
mov a1,(L1_CACHE_WAYDISP*0,a0) # conditionally purge this line
# in all ways

@@ -186,7 +242,10 @@ mn10300_dcache_flush_inv_range_loop:
add L1_CACHE_BYTES,a1
and ~L1_CACHE_WAYDISP,a0 # make sure way stay on way 0
add -1,d1
- bne mn10300_dcache_flush_inv_range_loop
+ bne mn10300_local_dcache_flush_inv_range_loop

-mn10300_dcache_flush_inv_range_end:
- ret [d2,d3],8
+mn10300_local_dcache_flush_inv_range_end:
+ ret [d2],4
+ .size mn10300_local_dcache_flush_inv_page,.-mn10300_local_dcache_flush_inv_page
+ .size mn10300_local_dcache_flush_inv_range,.-mn10300_local_dcache_flush_inv_range
+ .size mn10300_local_dcache_flush_inv_range2,.-mn10300_local_dcache_flush_inv_range2
diff --git a/arch/mn10300/mm/cache-inv-by-tag.S b/arch/mn10300/mm/cache-inv-by-tag.S
index e839d0a..e9713b4 100644
--- a/arch/mn10300/mm/cache-inv-by-tag.S
+++ b/arch/mn10300/mm/cache-inv-by-tag.S
@@ -13,40 +13,65 @@
#include <asm/smp.h>
#include <asm/page.h>
#include <asm/cache.h>
+#include <asm/irqflags.h>
+#include <asm/cacheflush.h>

-#define mn10300_dcache_inv_range_intr_interval \
+#define mn10300_local_dcache_inv_range_intr_interval \
+((1 << MN10300_DCACHE_INV_RANGE_INTR_LOG2_INTERVAL) - 1)

-#if mn10300_dcache_inv_range_intr_interval > 0xff
+#if mn10300_local_dcache_inv_range_intr_interval > 0xff
#error MN10300_DCACHE_INV_RANGE_INTR_LOG2_INTERVAL must be 8 or less
#endif

.am33_2

- .globl mn10300_icache_inv
- .globl mn10300_dcache_inv
- .globl mn10300_dcache_inv_range
- .globl mn10300_dcache_inv_range2
- .globl mn10300_dcache_inv_page
+ .globl mn10300_local_icache_inv_page
+ .globl mn10300_local_icache_inv_range
+ .globl mn10300_local_icache_inv_range2
+
+mn10300_local_icache_inv_page = mn10300_local_icache_inv
+mn10300_local_icache_inv_range = mn10300_local_icache_inv
+mn10300_local_icache_inv_range2 = mn10300_local_icache_inv
+
+#ifndef CONFIG_SMP
+ .globl mn10300_icache_inv
+ .globl mn10300_icache_inv_page
+ .globl mn10300_icache_inv_range
+ .globl mn10300_icache_inv_range2
+ .globl mn10300_dcache_inv
+ .globl mn10300_dcache_inv_page
+ .globl mn10300_dcache_inv_range
+ .globl mn10300_dcache_inv_range2
+
+mn10300_icache_inv = mn10300_local_icache_inv
+mn10300_icache_inv_page = mn10300_local_icache_inv_page
+mn10300_icache_inv_range = mn10300_local_icache_inv_range
+mn10300_icache_inv_range2 = mn10300_local_icache_inv_range2
+mn10300_dcache_inv = mn10300_local_dcache_inv
+mn10300_dcache_inv_page = mn10300_local_dcache_inv_page
+mn10300_dcache_inv_range = mn10300_local_dcache_inv_range
+mn10300_dcache_inv_range2 = mn10300_local_dcache_inv_range2
+
+#endif /* !CONFIG_SMP */

###############################################################################
#
-# void mn10300_icache_inv(void)
+# void mn10300_local_icache_inv(void)
# Invalidate the entire icache
#
###############################################################################
ALIGN
-mn10300_icache_inv:
+ .globl mn10300_local_icache_inv
+ .type mn10300_local_icache_inv,@function
+mn10300_local_icache_inv:
mov CHCTR,a0

movhu (a0),d0
btst CHCTR_ICEN,d0
- beq mn10300_icache_inv_end
+ beq mn10300_local_icache_inv_end

- mov epsw,d1
- and ~EPSW_IE,epsw
- nop
- nop
+#if defined(CONFIG_AM33_2) || defined(CONFIG_AM33_3)
+ LOCAL_CLI_SAVE(d1)

# disable the icache
and ~CHCTR_ICEN,d0
@@ -75,29 +100,36 @@ mn10300_icache_inv:
movhu d0,(a0)
movhu (a0),d0

- mov d1,epsw
+ LOCAL_IRQ_RESTORE(d1)
+#else /* CONFIG_AM33_2 || CONFIG_AM33_3 */
+ # invalidate
+ or CHCTR_ICINV,d0
+ movhu d0,(a0)
+ movhu (a0),d0
+#endif /* CONFIG_AM33_2 || CONFIG_AM33_3 */

-mn10300_icache_inv_end:
+mn10300_local_icache_inv_end:
ret [],0
+ .size mn10300_local_icache_inv,.-mn10300_local_icache_inv

###############################################################################
#
-# void mn10300_dcache_inv(void)
+# void mn10300_local_dcache_inv(void)
# Invalidate the entire dcache
#
###############################################################################
ALIGN
-mn10300_dcache_inv:
+ .globl mn10300_local_dcache_inv
+ .type mn10300_local_dcache_inv,@function
+mn10300_local_dcache_inv:
mov CHCTR,a0

movhu (a0),d0
btst CHCTR_DCEN,d0
- beq mn10300_dcache_inv_end
+ beq mn10300_local_dcache_inv_end

- mov epsw,d1
- and ~EPSW_IE,epsw
- nop
- nop
+#if defined(CONFIG_AM33_2) || defined(CONFIG_AM33_3)
+ LOCAL_CLI_SAVE(d1)

# disable the dcache
and ~CHCTR_DCEN,d0
@@ -126,40 +158,69 @@ mn10300_dcache_inv:
movhu d0,(a0)
movhu (a0),d0

- mov d1,epsw
+ LOCAL_IRQ_RESTORE(d1)
+#else /* CONFIG_AM33_2 || CONFIG_AM33_3 */
+ # invalidate
+ or CHCTR_DCINV,d0
+ movhu d0,(a0)
+ movhu (a0),d0
+#endif /* CONFIG_AM33_2 || CONFIG_AM33_3 */

-mn10300_dcache_inv_end:
+mn10300_local_dcache_inv_end:
ret [],0
+ .size mn10300_local_dcache_inv,.-mn10300_local_dcache_inv

###############################################################################
#
-# void mn10300_dcache_inv_range(unsigned start, unsigned end)
-# void mn10300_dcache_inv_range2(unsigned start, unsigned size)
-# void mn10300_dcache_inv_page(unsigned start)
+# void mn10300_local_dcache_inv_range(unsigned long start, unsigned long end)
+# void mn10300_local_dcache_inv_range2(unsigned long start, unsigned long size)
+# void mn10300_local_dcache_inv_page(unsigned long start)
# Invalidate a range of addresses on a page in the dcache
#
###############################################################################
ALIGN
-mn10300_dcache_inv_page:
+ .globl mn10300_local_dcache_inv_page
+ .globl mn10300_local_dcache_inv_range
+ .globl mn10300_local_dcache_inv_range2
+ .type mn10300_local_dcache_inv_page,@function
+ .type mn10300_local_dcache_inv_range,@function
+ .type mn10300_local_dcache_inv_range2,@function
+mn10300_local_dcache_inv_page:
+ and ~(PAGE_SIZE-1),d0
mov PAGE_SIZE,d1
-mn10300_dcache_inv_range2:
+mn10300_local_dcache_inv_range2:
add d0,d1
-mn10300_dcache_inv_range:
+mn10300_local_dcache_inv_range:
+ # If we are in writeback mode we check the start and end alignments,
+ # and if they're not cacheline-aligned, we must flush any bits outside
+ # the range that share cachelines with stuff inside the range
+#ifdef CONFIG_MN10300_CACHE_WBACK
+ btst ~(L1_CACHE_BYTES-1),d0
+ bne 1f
+ btst ~(L1_CACHE_BYTES-1),d1
+ beq 2f
+1:
+ bra mn10300_local_dcache_flush_inv_range
+2:
+#endif /* CONFIG_MN10300_CACHE_WBACK */
+
movm [d2,d3,a2],(sp)
- mov CHCTR,a2

+ mov CHCTR,a2
movhu (a2),d2
btst CHCTR_DCEN,d2
- beq mn10300_dcache_inv_range_end
+ beq mn10300_local_dcache_inv_range_end

+#ifndef CONFIG_MN10300_CACHE_WBACK
and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d0 # round start
# addr down
- mov d0,a1

- add L1_CACHE_BYTES,d1 # round end addr up
+ add L1_CACHE_BYTES,d1 # round end addr up
and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d1
+#endif /* !CONFIG_MN10300_CACHE_WBACK */
+ mov d0,a1

- clr d2 # we're going to clear tag ram
+ clr d2 # we're going to clear tag RAM
# entries

# read the tags from the tag RAM, and if they indicate a valid dirty
@@ -176,14 +237,8 @@ mn10300_dcache_inv_range:

and ~(L1_CACHE_DISPARITY-1),a1 # determine comparator base

-mn10300_dcache_inv_range_outer_loop:
- # disable interrupts
- mov epsw,d3
- and ~EPSW_IE,epsw
- nop # note that reading CHCTR and
- # AND'ing D0 occupy two delay
- # slots after disabling
- # interrupts
+mn10300_local_dcache_inv_range_outer_loop:
+ LOCAL_CLI_SAVE(d3)

# disable the dcache
movhu (a2),d0
@@ -196,63 +251,63 @@ mn10300_dcache_inv_range_outer_loop:
btst CHCTR_DCBUSY,d0
lne

-mn10300_dcache_inv_range_loop:
+mn10300_local_dcache_inv_range_loop:

# process the way 0 slot
mov (L1_CACHE_WAYDISP*0,a0),d0 # read the tag in the way 0 slot
btst L1_CACHE_TAG_VALID,d0
- beq mn10300_dcache_inv_range_skip_0 # jump if this cacheline is not
- # valid
+ beq mn10300_local_dcache_inv_range_skip_0 # jump if this cacheline
+ # is not valid

xor a1,d0
lsr 12,d0
- bne mn10300_dcache_inv_range_skip_0 # jump if not this cacheline
+ bne mn10300_local_dcache_inv_range_skip_0 # jump if not this cacheline

- mov d2,(a0) # kill the tag
+ mov d2,(L1_CACHE_WAYDISP*0,a0) # kill the tag

-mn10300_dcache_inv_range_skip_0:
+mn10300_local_dcache_inv_range_skip_0:

# process the way 1 slot
mov (L1_CACHE_WAYDISP*1,a0),d0 # read the tag in the way 1 slot
btst L1_CACHE_TAG_VALID,d0
- beq mn10300_dcache_inv_range_skip_1 # jump if this cacheline is not
- # valid
+ beq mn10300_local_dcache_inv_range_skip_1 # jump if this cacheline
+ # is not valid

xor a1,d0
lsr 12,d0
- bne mn10300_dcache_inv_range_skip_1 # jump if not this cacheline
+ bne mn10300_local_dcache_inv_range_skip_1 # jump if not this cacheline

- mov d2,(a0) # kill the tag
+ mov d2,(L1_CACHE_WAYDISP*1,a0) # kill the tag

-mn10300_dcache_inv_range_skip_1:
+mn10300_local_dcache_inv_range_skip_1:

# process the way 2 slot
mov (L1_CACHE_WAYDISP*2,a0),d0 # read the tag in the way 2 slot
btst L1_CACHE_TAG_VALID,d0
- beq mn10300_dcache_inv_range_skip_2 # jump if this cacheline is not
- # valid
+ beq mn10300_local_dcache_inv_range_skip_2 # jump if this cacheline
+ # is not valid

xor a1,d0
lsr 12,d0
- bne mn10300_dcache_inv_range_skip_2 # jump if not this cacheline
+ bne mn10300_local_dcache_inv_range_skip_2 # jump if not this cacheline

- mov d2,(a0) # kill the tag
+ mov d2,(L1_CACHE_WAYDISP*2,a0) # kill the tag

-mn10300_dcache_inv_range_skip_2:
+mn10300_local_dcache_inv_range_skip_2:

# process the way 3 slot
mov (L1_CACHE_WAYDISP*3,a0),d0 # read the tag in the way 3 slot
btst L1_CACHE_TAG_VALID,d0
- beq mn10300_dcache_inv_range_skip_3 # jump if this cacheline is not
- # valid
+ beq mn10300_local_dcache_inv_range_skip_3 # jump if this cacheline
+ # is not valid

xor a1,d0
lsr 12,d0
- bne mn10300_dcache_inv_range_skip_3 # jump if not this cacheline
+ bne mn10300_local_dcache_inv_range_skip_3 # jump if not this cacheline

- mov d2,(a0) # kill the tag
+ mov d2,(L1_CACHE_WAYDISP*3,a0) # kill the tag

-mn10300_dcache_inv_range_skip_3:
+mn10300_local_dcache_inv_range_skip_3:

# approx every N steps we re-enable the cache and see if there are any
# interrupts to be processed
@@ -260,9 +315,10 @@ mn10300_dcache_inv_range_skip_3:
# (the bottom nibble of the count is zero in both cases)
add L1_CACHE_BYTES,a0
add L1_CACHE_BYTES,a1
+ and ~L1_CACHE_WAYDISP,a0
add -1,d1
- btst mn10300_dcache_inv_range_intr_interval,d1
- bne mn10300_dcache_inv_range_loop
+ btst mn10300_local_dcache_inv_range_intr_interval,d1
+ bne mn10300_local_dcache_inv_range_loop

# wait for the cache to finish what it's doing
setlb
@@ -279,11 +335,14 @@ mn10300_dcache_inv_range_skip_3:
# - we don't bother with delay NOPs as we'll have enough instructions
# before we disable interrupts again to give the interrupts a chance
# to happen
- mov d3,epsw
+ LOCAL_IRQ_RESTORE(d3)

# go around again if the counter hasn't yet reached zero
add 0,d1
- bne mn10300_dcache_inv_range_outer_loop
+ bne mn10300_local_dcache_inv_range_outer_loop

-mn10300_dcache_inv_range_end:
+mn10300_local_dcache_inv_range_end:
ret [d2,d3,a2],12
+ .size mn10300_local_dcache_inv_page,.-mn10300_local_dcache_inv_page
+ .size mn10300_local_dcache_inv_range,.-mn10300_local_dcache_inv_range
+ .size mn10300_local_dcache_inv_range2,.-mn10300_local_dcache_inv_range2
diff --git a/arch/mn10300/proc-mn103e010/include/proc/cache.h b/arch/mn10300/proc-mn103e010/include/proc/cache.h
index bdc1f9a..c152800 100644
--- a/arch/mn10300/proc-mn103e010/include/proc/cache.h
+++ b/arch/mn10300/proc-mn103e010/include/proc/cache.h
@@ -30,4 +30,13 @@
*/
#define MN10300_DCACHE_INV_RANGE_INTR_LOG2_INTERVAL 4

+/*
+ * The size of range at which it becomes more economical to just flush the
+ * whole cache rather than trying to flush the specified range.
+ */
+#define MN10300_DCACHE_FLUSH_BORDER \
+ +(L1_CACHE_NWAYS * L1_CACHE_NENTRIES * L1_CACHE_BYTES)
+#define MN10300_DCACHE_FLUSH_INV_BORDER \
+ +(L1_CACHE_NWAYS * L1_CACHE_NENTRIES * L1_CACHE_BYTES)
+
#endif /* _ASM_PROC_CACHE_H */


\
 
 \ /
  Last update: 2010-10-26 04:59    [from the cache]
©2003-2011 Jasper Spaans