libpayload: Get current tick from high register in generic timer
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.
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>
diff --git a/payloads/libpayload/drivers/timer/generic.c b/payloads/libpayload/drivers/timer/generic.c
index 4c06618..ac26f40 100644
--- a/payloads/libpayload/drivers/timer/generic.c
+++ b/payloads/libpayload/drivers/timer/generic.c
@@ -53,7 +53,7 @@
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;