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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 /README
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 'README')
-rw-r--r--README5
1 files changed, 5 insertions, 0 deletions
diff --git a/README b/README
index 1d0b946..03bed18 100644
--- a/README
+++ b/README
@@ -4824,6 +4824,11 @@ Low Level (hardware related) configuration options:
other boot loader or by a debugger which performs
these initializations itself.
+- CONFIG_SKIP_LOWLEVEL_INIT_ONLY
+ [ARM926EJ-S only] This allows just the call to lowlevel_init()
+ to be skipped. The normal CPU15 init (such as enabling the
+ instruction cache) is still performed.
+
- CONFIG_SPL_BUILD
Modifies the behaviour of start.S when compiling a loader
that is executed before the actual U-Boot. E.g. when
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