patch-2.3.42 linux/arch/sparc/ap1000/timer.c
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- Lines: 126
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.41/linux/arch/sparc/ap1000/timer.c
- Orig date:
Tue Aug 4 23:40:54 1998
diff -u --recursive --new-file v2.3.41/linux/arch/sparc/ap1000/timer.c linux/arch/sparc/ap1000/timer.c
@@ -1,125 +0,0 @@
- /*
- * Copyright 1996 The Australian National University.
- * Copyright 1996 Fujitsu Laboratories Limited
- *
- * This software may be distributed under the terms of the Gnu
- * Public License version 2 or later
- */
-/* routines to control the AP1000 timer chip */
-
-#include <linux/time.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/mm.h>
-#include <linux/malloc.h>
-#include <asm/ap1000/apservice.h>
-#include <asm/ap1000/apreg.h>
-#include <asm/irq.h>
-
-#define INIT_TIM1 (781250/HZ)
-#define INIT_TIM0 (781250/(10*HZ))
-
-static unsigned long last_freerun;
-
-unsigned ap_freerun(void)
-{
- return *((volatile unsigned long *)(MC_FREERUN + 4));
-}
-
-void ap_clear_clock_irq(void)
-{
- MC_OUT(MC_INTR, AP_CLR_INTR_REQ << MC_INTR_ITIM1_SH);
- last_freerun = *((unsigned long *)(MC_FREERUN + 4));
- tnet_check_completion();
-#if 1
- if ((((unsigned)jiffies) % (HZ/4)) == 0) {
- msc_timer();
- ap_xor_led(1);
- bif_timer();
- ap_dbg_flush();
-#if 0
- bif_led_status();
-#endif
- }
-#endif
-}
-
-
-void ap_gettimeofday(struct timeval *xt)
-{
- unsigned long d;
- unsigned v;
- unsigned long new_freerun;
-
- /* this is in 80ns units - we only use the low 32 bits
- as 5mins is plenty for this stuff */
- d = new_freerun = *((unsigned long *)(MC_FREERUN + 4));
-
- if (d < last_freerun) {
- /* wraparound */
- d += ((~0) - last_freerun);
- } else {
- d -= last_freerun;
- }
-
- /* convert to microseconds */
- v = ((d&0xffffff)*10)/125;
-
- /* only want microseconds/HZ */
- v = v%(1000000/HZ);
-
- xt->tv_usec += v;
-
- last_freerun = new_freerun;
-}
-
-static void profile_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
- if (prof_buffer && current->pid) {
- extern int _stext;
- unsigned long ip = instruction_pointer(regs);
- ip -= (unsigned long) &_stext;
- ip >>= prof_shift;
- if (ip < prof_len)
- prof_buffer[ip]++;
- }
- MC_OUT(MC_INTR,AP_CLR_INTR_REQ << MC_INTR_ITIM0_SH);
-}
-
-void ap_profile_init(void)
-{
- if (prof_shift) {
- printk("Initialising profiling with prof_shift=%d\n",(int)prof_shift);
- MC_OUT(MC_INTR,AP_CLR_INTR_REQ << MC_INTR_ITIM0_SH);
- MC_OUT(MC_INTR,AP_CLR_INTR_MASK << MC_INTR_ITIM0_SH);
- }
-}
-
-void ap_init_timers(void)
-{
- extern void timer_interrupt(int irq, void *dev_id, struct pt_regs * regs);
- unsigned flags;
-
- printk("Initialising ap1000 timer\n");
-
- save_flags(flags); cli();
-
- request_irq(APTIM1_IRQ,
- timer_interrupt,
- (SA_INTERRUPT | SA_STATIC_ALLOC),
- "timer", NULL);
-
- request_irq(APTIM0_IRQ,
- profile_interrupt,
- (SA_INTERRUPT | SA_STATIC_ALLOC),
- "profile", NULL);
-
- ap_clear_clock_irq();
-
- MC_OUT(MC_ITIMER0,INIT_TIM0);
- MC_OUT(MC_ITIMER1,INIT_TIM1);
- MC_OUT(MC_INTR,AP_CLR_INTR_REQ << MC_INTR_ITIM1_SH);
- MC_OUT(MC_INTR,AP_CLR_INTR_MASK << MC_INTR_ITIM1_SH);
- MC_OUT(MC_INTR,AP_SET_INTR_MASK << MC_INTR_ITIM0_SH);
- restore_flags(flags);
-}
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