diff options
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/ppc403/clock/clock.c | 50 |
1 files changed, 23 insertions, 27 deletions
diff --git a/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c b/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c index 44f07eff1f..d7e9514b5f 100644 --- a/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c +++ b/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c @@ -132,6 +132,7 @@ void Install_clock(rtems_isr_entry clock_isr) { rtems_isr_entry previous_isr; rtems_unsigned32 pvr, iocr; + register rtems_unsigned32 tcr; Clock_driver_ticks = 0; @@ -164,31 +165,29 @@ void Install_clock(rtems_isr_entry clock_isr) pit_value = rtems_configuration_get_microseconds_per_tick() * rtems_cpu_configuration_get_clicks_per_usec(); - if ( rtems_configuration_get_ticks_per_timeslice() ) { - register rtems_unsigned32 tcr; - /* - * initialize the interval here - * First tick is set to right amount of time in the future - * Future ticks will be incremented over last value set - * in order to provide consistent clicks in the face of - * interrupt overhead - */ - - rtems_interrupt_catch(clock_isr, PPC_IRQ_PIT, &previous_isr); - - asm volatile ("mtspr 0x3db, %0" : : "r" (pit_value)); /* PIT */ + /* + * initialize the interval here + * First tick is set to right amount of time in the future + * Future ticks will be incremented over last value set + * in order to provide consistent clicks in the face of + * interrupt overhead + */ + + rtems_interrupt_catch(clock_isr, PPC_IRQ_PIT, &previous_isr); + + asm volatile ("mtspr 0x3db, %0" : : "r" (pit_value)); /* PIT */ - asm volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */ + asm volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */ - tcr &= ~ 0x04400000; + tcr &= ~ 0x04400000; - tcr |= (auto_restart ? 0x04400000 : 0x04000000); + tcr |= (auto_restart ? 0x04400000 : 0x04000000); - tick_time = get_itimer() + pit_value; + tick_time = get_itimer() + pit_value; - asm volatile ("mtspr 0x3da, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */ - } + asm volatile ("mtspr 0x3da, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */ + atexit(Clock_exit); } @@ -214,18 +213,15 @@ ReInstall_clock(rtems_isr_entry new_clock_isr) void Clock_exit(void) { - if ( rtems_configuration_get_ticks_per_timeslice() ) { - register rtems_unsigned32 tcr; + register rtems_unsigned32 tcr; - asm volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */ + asm volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */ - tcr &= ~ 0x04400000; + tcr &= ~ 0x04400000; - asm volatile ("mtspr 0x3da, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */ + asm volatile ("mtspr 0x3da, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */ - (void) set_vector(0, PPC_IRQ_PIT, 1); - } - + (void) set_vector(0, PPC_IRQ_PIT, 1); } rtems_device_driver Clock_initialize( |