* [U-Boot] [PATCH] ppc4xx: Flush complete dcache in relocate_code()
@ 2010-11-26 14:45 Stefan Roese
2010-11-28 10:07 ` Stefan Roese
0 siblings, 1 reply; 2+ messages in thread
From: Stefan Roese @ 2010-11-26 14:45 UTC (permalink / raw)
To: u-boot
When the cache is enabled in SDRAM we need to flush not only the global
data area but also the bd_info struct in relocate_code. This patch now
flushed the complete dcache (all dcache lines) via flush_dcache() instead
of adding a flush_dcache_range() call for bd_info since this is faster.
Signed-off-by: Stefan Roese <sr@denx.de>
---
arch/powerpc/cpu/ppc4xx/start.S | 13 +++++++------
1 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/cpu/ppc4xx/start.S b/arch/powerpc/cpu/ppc4xx/start.S
index d77272c..99822d7 100644
--- a/arch/powerpc/cpu/ppc4xx/start.S
+++ b/arch/powerpc/cpu/ppc4xx/start.S
@@ -1391,8 +1391,8 @@ in32r:
relocate_code:
#if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
/*
- * We need to flush the initial global data (gd_t) before the dcache
- * will be invalidated.
+ * We need to flush the initial global data (gd_t) and bd_info
+ * before the dcache will be invalidated.
*/
/* Save registers */
@@ -1400,10 +1400,11 @@ relocate_code:
mr r10, r4
mr r11, r5
- /* Flush initial global data range */
- mr r3, r4
- addi r4, r4, GENERATED_GBL_DATA_SIZE at l
- bl flush_dcache_range
+ /*
+ * Flush complete dcache, this is faster than flushing the
+ * ranges for global_data and bd_info instead.
+ */
+ bl flush_dcache
#if defined(CONFIG_SYS_INIT_DCACHE_CS)
/*
--
1.7.3.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [U-Boot] [PATCH] ppc4xx: Flush complete dcache in relocate_code()
2010-11-26 14:45 [U-Boot] [PATCH] ppc4xx: Flush complete dcache in relocate_code() Stefan Roese
@ 2010-11-28 10:07 ` Stefan Roese
0 siblings, 0 replies; 2+ messages in thread
From: Stefan Roese @ 2010-11-28 10:07 UTC (permalink / raw)
To: u-boot
On Friday 26 November 2010 15:45:34 Stefan Roese wrote:
> When the cache is enabled in SDRAM we need to flush not only the global
> data area but also the bd_info struct in relocate_code. This patch now
> flushed the complete dcache (all dcache lines) via flush_dcache() instead
> of adding a flush_dcache_range() call for bd_info since this is faster.
Applied to u-boot-ppc4xx/master. Thanks.
Cheers,
Stefan
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: office at denx.de
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