[rtems commit] bsp/qoriq: Fix L1 cache flush
Sebastian Huber
sebh at rtems.org
Mon Apr 3 12:09:16 UTC 2017
Module: rtems
Branch: master
Commit: d2a45a58aa9b2d739daa3768af2864effc8f3660
Changeset: http://git.rtems.org/rtems/commit/?id=d2a45a58aa9b2d739daa3768af2864effc8f3660
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Thu Mar 23 10:07:52 2017 +0100
bsp/qoriq: Fix L1 cache flush
---
c/src/lib/libbsp/powerpc/qoriq/start/start.S | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/c/src/lib/libbsp/powerpc/qoriq/start/start.S b/c/src/lib/libbsp/powerpc/qoriq/start/start.S
index 481b664..d9a8a39 100644
--- a/c/src/lib/libbsp/powerpc/qoriq/start/start.S
+++ b/c/src/lib/libbsp/powerpc/qoriq/start/start.S
@@ -54,14 +54,21 @@ _start:
bl bsp_fdt_copy
#ifdef QORIQ_HAS_WRITE_BACK_L1_CACHE
- LWI r3, bsp_section_start_begin
- LWI r4, bsp_section_data_load_end
- sub r4, r4, r3
- bl rtems_cache_flush_multiple_data_lines
-#else
- bl qoriq_l1cache_invalidate
+ /*
+ * See PowerPC e500 Core Family Reference Manual, 11.5, L1 Data Cache
+ * Flushing.
+ */
+ LWI r3, 12 * 128
+ mtctr r3
+ LWI r4, bsp_section_bss_begin
+1:
+ dcbz r0, r4
+ addi r4, r4, 32
+ bdnz 1b
#endif
+ bl qoriq_l1cache_invalidate
+
#ifdef QORIQ_CLUSTER_1_L2CSR0
LWI r3, QORIQ_CLUSTER_1_L2CSR0
bl qoriq_l2cache_flush_invalidate
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