On Mon, Jul 12, 2021 at 03:04:21PM +0100, Peter Hoyes wrote: > From: Peter Hoyes <peter.ho...@arm.com> > > CNTFRQ_EL0 is only writable from the highest supported exception > level on the platform. For Armv8-A, this is typically EL3, but > technically EL2 and EL3 are optional so it may need to be > initialized at EL2 or EL1. For Armv8-R, the highest exception > level is always EL2. > > This patch moves the initialization outside of the switch_el > block and uses a new macro branch_if_not_highest_el which > dynamically detects whether it is at the highest supported > exception level. > > Linux's docs state that CNTFRQ_EL0 should be initialized by the > bootloader. If not set, the the U-Boot prompt countdown hangs. > > Signed-off-by: Peter Hoyes <peter.ho...@arm.com>
Applied to u-boot/master, thanks! -- Tom
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