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authorJens Arnold <amiconn@rockbox.org>2007-10-17 20:45:13 +0000
committerJens Arnold <amiconn@rockbox.org>2007-10-17 20:45:13 +0000
commit3674af64417b911ce69539abeb6b99e3875b1a90 (patch)
tree6125777a6e6852fc4e5e7bf75fba77b1a404f060 /firmware/target/coldfire/crt0.S
parent702600cbdb2a5ecf381c5e9533b302443eb45dce (diff)
downloadrockbox-3674af64417b911ce69539abeb6b99e3875b1a90.tar.gz
rockbox-3674af64417b911ce69539abeb6b99e3875b1a90.zip
Coldfire: Partially revert buffered writes, and enable them explicitly for the LCD only. Turned out that with buffered writes enabled, reads after writes are not always serialized, which is a bad thing for I/O. Buffered writes to the LCD are safe because that's write-only. Fixes FS #7985. How come I didn't notice this earlier? :>
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15173 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/coldfire/crt0.S')
-rw-r--r--firmware/target/coldfire/crt0.S7
1 files changed, 4 insertions, 3 deletions
diff --git a/firmware/target/coldfire/crt0.S b/firmware/target/coldfire/crt0.S
index 1393bc8bbd..cb9846a63b 100644
--- a/firmware/target/coldfire/crt0.S
+++ b/firmware/target/coldfire/crt0.S
@@ -218,14 +218,15 @@ start:
move.l #0x01000000,%d0
movec.l %d0,%cacr
- /* Enable cache, default=non-cacheable, buffered writes */
- move.l #0x80000100,%d0
+ /* Enable cache, default=non-cacheable, no buffered writes */
+ move.l #0x80000000,%d0
movec.l %d0,%cacr
/* Cache enabled in SDRAM only, buffered writes enabled */
move.l #0x3103c020,%d0
movec.l %d0,%acr0
- moveq.l #0,%d0
+ /* Buffered writes enabled for the LCD */
+ move.l #0xf000c060,%d0
movec.l %d0,%acr1
#ifndef BOOTLOADER