|author||Simon Glass <email@example.com>||2016-05-05 07:28:06 -0600|
|committer||Andreas Bießmann <firstname.lastname@example.org>||2016-06-12 23:49:38 +0200|
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 <email@example.com> Tested-on: smartweb, corvus, taurus, axm Tested-by: Heiko Schocher <firstname.lastname@example.org> Reviewed-by: Joe Hershberger <email@example.com> Signed-off-by: Simon Glass <firstname.lastname@example.org> Reviewed-by: Andreas Bießmann <email@example.com>
Diffstat (limited to 'README')
1 files changed, 5 insertions, 0 deletions
@@ -4824,6 +4824,11 @@ Low Level (hardware related) configuration options:
other boot loader or by a debugger which performs
these initializations itself.
+ [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.
Modifies the behaviour of start.S when compiling a loader
that is executed before the actual U-Boot. E.g. when