powerpc: Disable flush or invalidate dcache by range for some SoCs
Commit ac337168a unified functions to flush and invalidate dcache by
range. These two functions were no-op for SoCs other than 4xx and
MPC86xx. Adding these functions seemed to be correct but introduced
issues when the dcache is flushed. While the root cause is under
investigation, disable these functions for affected SoCs so various
drivers can work.
Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/powerpc/lib/ppccache.S b/arch/powerpc/lib/ppccache.S
index b96dbc6..66cf02d 100644
--- a/arch/powerpc/lib/ppccache.S
+++ b/arch/powerpc/lib/ppccache.S
@@ -65,6 +65,7 @@
* flush_dcache_range(unsigned long start, unsigned long stop)
*/
_GLOBAL(flush_dcache_range)
+#if defined(CONFIG_4xx) || defined(CONFIG_MPC86xx)
li r5,L1_CACHE_BYTES-1
andc r3,r3,r5
subf r4,r3,r4
@@ -77,6 +78,7 @@
addi r3,r3,L1_CACHE_BYTES
bdnz 1b
sync /* wait for dcbst's to get to ram */
+#endif
blr
/*
@@ -87,6 +89,7 @@
* invalidate_dcache_range(unsigned long start, unsigned long stop)
*/
_GLOBAL(invalidate_dcache_range)
+#if defined(CONFIG_4xx) || defined(CONFIG_MPC86xx)
li r5,L1_CACHE_BYTES-1
andc r3,r3,r5
subf r4,r3,r4
@@ -100,5 +103,6 @@
addi r3,r3,L1_CACHE_BYTES
bdnz 1b
sync /* wait for dcbi's to get to ram */
+#endif
blr