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UPSTREAM: libpayload: Get current tick from high register in generic timer

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This fixes the generic timer driver to get the current tick from the
high register, so that comparison with the high count value (obtained
previously from the same register) has a chance to succeed.

BUG=none
BRANCH=none
TEST=none

Change-Id: I5ce02bfa15a91ad34641b8e24813a5b7ca790ec3
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: https://review.coreboot.org/17929
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://chromium-review.googlesource.com/427823
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
This commit is contained in:
Paul Kocialkowski 2016-12-19 19:22:39 +01:00 • committed by chrome-bot
parent 5846d248fb
commit 11ddfce5d8
1 changed files with 1 additions and 1 deletions
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2
payloads/libpayload/drivers/timer/generic.c
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@ -53,7 +53,7 @@ uint64_t timer_raw_value(void)
do {
count_h = readl(phys_to_virt(CONFIG_LP_TIMER_GENERIC_HIGH_REG));
count_l = readl(phys_to_virt(CONFIG_LP_TIMER_GENERIC_REG));
cur_tick = readl(phys_to_virt(CONFIG_LP_TIMER_GENERIC_REG));
cur_tick = readl(phys_to_virt(CONFIG_LP_TIMER_GENERIC_HIGH_REG));
} while (cur_tick != count_h);
return (cur_tick << 32) + count_l;