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authorSimon Glass <sjg@chromium.org>2016-05-05 07:28:06 -0600
committerAndreas Bießmann <andreas@biessmann.org>2016-06-12 23:49:38 +0200
commitb5bd09820c79dc92b3e5fb5be4b47ce22c731443 (patch)
tree6a5fe76224aed2accdc889e21ae4f5d91c31d4bd /arch/arm/cpu/sa1100
parent909584665546ec51c54ac7d362f91fdabaef2cc2 (diff)
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arm: Allow skipping of low-level init with I-cache on
At present CONFIG_SKIP_LOWLEVEL_INIT prevents U-Boot from calling lowlevel_init(). This means that the instruction cache is not enabled and the board runs very slowly. What is really needed in many cases is to skip the call to lowlevel_init() but still perform CP15 init. Add an option to handle this. Reviewed-by: Heiko Schocher <hs@denx.de> Tested-on: smartweb, corvus, taurus, axm Tested-by: Heiko Schocher <hs@denx.de> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com> Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
Diffstat (limited to 'arch/arm/cpu/sa1100')
-rw-r--r--arch/arm/cpu/sa1100/start.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S
index 408b70d..f5318c9 100644
--- a/arch/arm/cpu/sa1100/start.S
+++ b/arch/arm/cpu/sa1100/start.S
@@ -96,6 +96,7 @@ cpu_init_crit:
ldr r1, cpuspeed
str r1, [r0, #PPCR]
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT_ONLY
/*
* before relocating, we have to setup RAM timing
* because memory timing is board-dependend, you will
@@ -104,6 +105,7 @@ cpu_init_crit:
mov ip, lr
bl lowlevel_init
mov lr, ip
+#endif
/*
* disable MMU stuff and enable I-cache