diff options
| author | Ionela Voinescu <ionela.voinescu@imgtec.com> | 2015-01-22 14:53:28 +0000 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-21 11:08:33 +0100 |
| commit | b29a67d8c87d1e66042bab3029bbb5b82bd4e972 (patch) | |
| tree | 2f3038c6556f13f29da21de313b957e745e6084f /payloads/libpayload/drivers/timer | |
| parent | 66fc77d3afbefa7b755bf0f025556b23ae4cff2c (diff) | |
libpayload: pistachio: fix timer implementation
timer_raw_value must return the number of CPU ticks, and not
the time obtained by dividing the ticks by the CPU frequency.
The CPU counter is increased at every 2 CPU clocks
and therfore the number of ticks will be the counter value
multiplied by 2.
BUG=chrome-os-partner:31438
TEST=tested on Pistachio FPGA; it works properly.
BRANCH=none
Change-Id: Iae62cb328e882f84822250bdf72146321ca9bbe0
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7ab25ce7dcaffb453ee774d870963a56444d46af
Original-Change-Id: I74408950900463a2c054d5aebd3edb005a325adb
Original-Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/242393
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/8744
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'payloads/libpayload/drivers/timer')
| -rw-r--r-- | payloads/libpayload/drivers/timer/img_pistachio.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/payloads/libpayload/drivers/timer/img_pistachio.c b/payloads/libpayload/drivers/timer/img_pistachio.c index dcfe555a73..ae53a9d0b1 100644 --- a/payloads/libpayload/drivers/timer/img_pistachio.c +++ b/payloads/libpayload/drivers/timer/img_pistachio.c @@ -20,11 +20,6 @@ #include <libpayload.h> #include <arch/cpu.h> -static int get_timer_speed_khz(void) -{ - return get_cpu_speed()/2; -} - uint64_t timer_hz(void) { return lib_sysinfo.cpu_khz * 1000; @@ -32,5 +27,5 @@ uint64_t timer_hz(void) uint64_t timer_raw_value(void) { - return read_c0_count()/(get_timer_speed_khz()/1000); + return read_c0_count() * 2; } |