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authorGreg Watson <jarrah@users.sourceforge.net>2004-03-07 17:28:59 +0000
committerGreg Watson <jarrah@users.sourceforge.net>2004-03-07 17:28:59 +0000
commitac00a0a7e2a4a7dccf4cde3f4d7550c07df216a2 (patch)
tree39c236f7df74b5cdfa5ad2db5832fefc287cf2ae /src/cpu/ppc
parentdd9651017a39bbe64ed7de8f91df7e51ce7b374d (diff)
downloadcoreboot-ac00a0a7e2a4a7dccf4cde3f4d7550c07df216a2.tar.xz
fix caching problem
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1380 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/ppc')
-rw-r--r--src/cpu/ppc/mpc74xx/Config.lb3
-rw-r--r--src/cpu/ppc/mpc74xx/cache.S23
2 files changed, 25 insertions, 1 deletions
diff --git a/src/cpu/ppc/mpc74xx/Config.lb b/src/cpu/ppc/mpc74xx/Config.lb
index 3c74233845..6005d9855c 100644
--- a/src/cpu/ppc/mpc74xx/Config.lb
+++ b/src/cpu/ppc/mpc74xx/Config.lb
@@ -17,6 +17,7 @@ default DCACHE_RAM_SIZE=0x8000
initinclude "FAMILY_INIT" cpu/ppc/mpc74xx/mpc74xx.inc
object clock.o
+object cache.S
initobject clock.o
-initobject cache.o
+initobject cache.S
diff --git a/src/cpu/ppc/mpc74xx/cache.S b/src/cpu/ppc/mpc74xx/cache.S
new file mode 100644
index 0000000000..237b178bdf
--- /dev/null
+++ b/src/cpu/ppc/mpc74xx/cache.S
@@ -0,0 +1,23 @@
+#define ASM
+#include "ppcreg.h"
+#include <ppc_asm.tmpl>
+
+#define NUM_CACHE_LINES 128*8
+#define L1_CACHE_LINE_SIZE 32
+#define cache_flush_buffer 0x1000
+
+/*
+ * Flush data cache
+ * Do this by just reading lots of stuff into the cache.
+ */
+.globl flush_dcache
+flush_dcache:
+ lis r3,cache_flush_buffer@h
+ ori r3,r3,cache_flush_buffer@l
+ li r4,NUM_CACHE_LINES
+ mtctr r4
+0: lwz r4,0(r3)
+ addi r3,r3,L1_CACHE_LINE_SIZE
+ bdnz 0b
+ blr
+