The current implementation has the timer being started before the interrupt handler is installed. It the interrupt occurs before the handler is installed, the timer interrupt is never reset and the timer stops
Signed-off-by: Graeme Russ graeme.russ@gmail.com --- cpu/i386/sc520/sc520_timer.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/cpu/i386/sc520/sc520_timer.c b/cpu/i386/sc520/sc520_timer.c index 2cb8656..2a3425b 100644 --- a/cpu/i386/sc520/sc520_timer.c +++ b/cpu/i386/sc520/sc520_timer.c @@ -54,9 +54,6 @@ int timer_init(void) write_mmcr_word (SC520_GPTMR1MAXCMPA, 100); write_mmcr_word (SC520_GPTMR1CTL, 0xe009);
- /* Clear the GP Timers status register */ - write_mmcr_byte (SC520_GPTMRSTA, 0x07); - /* Register the SC520 specific timer interrupt handler */ register_timer_isr (sc520_timer_isr);
@@ -64,6 +61,9 @@ int timer_init(void) irq_install_handler (0, timer_isr, NULL); unmask_irq (0);
+ /* Clear the GP Timer 1 status register to get the show rolling*/ + write_mmcr_byte (SC520_GPTMRSTA, 0x02); + return 0; }