summaryrefslogtreecommitdiff
path: root/cpu/mpc85xx/interrupts.c
diff options
context:
space:
mode:
authorwdenk <wdenk>2005-05-13 22:49:36 +0000
committerwdenk <wdenk>2005-05-13 22:49:36 +0000
commit343117bf12075a8d6c2fa228987cbd6a1dbce50a (patch)
treed07aa26a199e16c2da7f7a9d7823ef1fe3d5e438 /cpu/mpc85xx/interrupts.c
parent9dd41a7b0c5c94d74c25edfdd6393c656669c09a (diff)
downloadu-boot-imx-343117bf12075a8d6c2fa228987cbd6a1dbce50a.zip
u-boot-imx-343117bf12075a8d6c2fa228987cbd6a1dbce50a.tar.gz
u-boot-imx-343117bf12075a8d6c2fa228987cbd6a1dbce50a.tar.bz2
Fix timer handling on MPC85xx systems
Diffstat (limited to 'cpu/mpc85xx/interrupts.c')
-rw-r--r--cpu/mpc85xx/interrupts.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/cpu/mpc85xx/interrupts.c b/cpu/mpc85xx/interrupts.c
index 745b3b2..832781b 100644
--- a/cpu/mpc85xx/interrupts.c
+++ b/cpu/mpc85xx/interrupts.c
@@ -49,6 +49,22 @@ static __inline__ void set_msr(unsigned long msr)
asm volatile("isync");
}
+static __inline__ unsigned long get_dec (void)
+{
+ unsigned long val;
+
+ asm volatile ("mfdec %0":"=r" (val):);
+
+ return val;
+}
+
+
+static __inline__ void set_dec (unsigned long val)
+{
+ if (val)
+ asm volatile ("mtdec %0"::"r" (val));
+}
+
void enable_interrupts (void)
{
set_msr (get_msr() | MSR_EE);
@@ -62,9 +78,17 @@ int disable_interrupts (void)
return ((msr & MSR_EE) != 0);
}
-/* interrupt is not supported yet */
int interrupt_init (void)
{
+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
+
+ immr->im_pic.gcr = MPC85xx_PICGCR_RST;
+ while (immr->im_pic.gcr & MPC85xx_PICGCR_RST);
+ immr->im_pic.gcr = MPC85xx_PICGCR_M;
+ decrementer_count = get_tbclk() / CFG_HZ;
+ mtspr(SPRN_TCR, TCR_PIE);
+ set_dec (decrementer_count);
+ set_msr (get_msr () | MSR_EE);
return (0);
}
@@ -96,9 +120,9 @@ volatile ulong timestamp = 0;
*/
void timer_interrupt(struct pt_regs *regs)
{
- printf ("*** Timer Interrupt *** ");
timestamp++;
-
+ set_dec (decrementer_count);
+ mtspr(SPRN_TSR, TSR_PIS);
#if defined(CONFIG_WATCHDOG)
if ((timestamp % 1000) == 0)
reset_85xx_watchdog();