diff options
Diffstat (limited to 'arch/m68knommu/platform/5307/timers.c')
| -rw-r--r-- | arch/m68knommu/platform/5307/timers.c | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/arch/m68knommu/platform/5307/timers.c b/arch/m68knommu/platform/5307/timers.c deleted file mode 100644 index ef49596aa09..00000000000 --- a/arch/m68knommu/platform/5307/timers.c +++ /dev/null @@ -1,138 +0,0 @@ -/***************************************************************************/ - -/* - * timers.c -- generic ColdFire hardware timer support. - * - * Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com) - */ - -/***************************************************************************/ - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/param.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <asm/irq.h> -#include <asm/traps.h> -#include <asm/machdep.h> -#include <asm/coldfire.h> -#include <asm/mcftimer.h> -#include <asm/mcfsim.h> - -/***************************************************************************/ - -/* - * Default the timer and vector to use for ColdFire. Some ColdFire - * CPU's and some boards may want different. Their sub-architecture - * startup code (in config.c) can change these if they want. - */ -unsigned int mcf_timervector = 29; -unsigned int mcf_profilevector = 31; -unsigned int mcf_timerlevel = 5; - -static volatile struct mcftimer *mcf_timerp; - -/* - * These provide the underlying interrupt vector support. - * Unfortunately it is a little different on each ColdFire. - */ -extern void mcf_settimericr(int timer, int level); -extern int mcf_timerirqpending(int timer); - -/***************************************************************************/ - -void coldfire_tick(void) -{ - /* Reset the ColdFire timer */ - mcf_timerp->ter = MCFTIMER_TER_CAP | MCFTIMER_TER_REF; -} - -/***************************************************************************/ - -void coldfire_timer_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)) -{ - /* Set up an internal TIMER as poll clock */ - mcf_timerp = (volatile struct mcftimer *) (MCF_MBAR + MCFTIMER_BASE1); - mcf_timerp->tmr = MCFTIMER_TMR_DISABLE; - - mcf_timerp->trr = (unsigned short) ((MCF_BUSCLK / 16) / HZ); - mcf_timerp->tmr = MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 | - MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE; - - request_irq(mcf_timervector, handler, SA_INTERRUPT, "timer", NULL); - mcf_settimericr(1, mcf_timerlevel); - -#ifdef CONFIG_HIGHPROFILE - coldfire_profile_init(); -#endif -} - -/***************************************************************************/ - -unsigned long coldfire_timer_offset(void) -{ - unsigned long trr, tcn, offset; - - /* - * The change to pointer and de-reference is to force the compiler - * to read the registers with a single 16bit access. Otherwise it - * does some crazy 8bit read combining. - */ - tcn = *(&mcf_timerp->tcn); - trr = *(&mcf_timerp->trr); - offset = (tcn * (1000000 / HZ)) / trr; - - /* Check if we just wrapped the counters and maybe missed a tick */ - if ((offset < (1000000 / HZ / 2)) && mcf_timerirqpending(1)) - offset += 1000000 / HZ; - return offset; -} - -/***************************************************************************/ -#ifdef CONFIG_HIGHPROFILE -/***************************************************************************/ - -/* - * Choose a reasonably fast profile timer. Make it an odd value to - * try and get good coverage of kernal operations. - */ -#define PROFILEHZ 1013 - -static volatile struct mcftimer *mcf_proftp; - -/* - * Use the other timer to provide high accuracy profiling info. - */ - -void coldfire_profile_tick(int irq, void *dummy, struct pt_regs *regs) -{ - /* Reset ColdFire timer2 */ - mcf_proftp->ter = MCFTIMER_TER_CAP | MCFTIMER_TER_REF; - if (current->pid) - profile_tick(CPU_PROFILING, regs); -} - -/***************************************************************************/ - -void coldfire_profile_init(void) -{ - printk(KERN_INFO "PROFILE: lodging TIMER2 @ %dHz as profile timer\n", PROFILEHZ); - - /* Set up TIMER 2 as high speed profile clock */ - mcf_proftp = (volatile struct mcftimer *) (MCF_MBAR + MCFTIMER_BASE2); - mcf_proftp->tmr = MCFTIMER_TMR_DISABLE; - - mcf_proftp->trr = (unsigned short) ((MCF_CLK / 16) / PROFILEHZ); - mcf_proftp->tmr = MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 | - MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE; - - request_irq(mcf_profilevector, coldfire_profile_tick, - (SA_INTERRUPT | IRQ_FLG_FAST), "profile timer", NULL); - mcf_settimericr(2, 7); -} - -/***************************************************************************/ -#endif /* CONFIG_HIGHPROFILE */ -/***************************************************************************/ |