diff options
author | Greg Ungerer <gerg@snapgear.com> | 2008-02-01 17:37:39 +1000 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-02-01 20:58:10 +1100 |
commit | 297a834d0b593179cc178ddc5f128c8b8844d7be (patch) | |
tree | 31355d0128d00ba0a0aa9b23b49b893727a37655 /arch/m68knommu/platform/5307/timers.c | |
parent | 703d01255e650b2f1ff6b2df5345bd481fd094e6 (diff) |
m68knommu: move ColdFire timers.c to its own coldfire directory
Move common ColdFire CPU timers.c to common coldfire platform directory.
Currently the common ColdFire CPU family code sits in the
arch/m68knommu/platform/5307 directory. This is confusing, the files
containing this common code are in no way specific to the 5307 ColdFire.
Create an arch/m68knommu/platform/coldfire directory to contain this
common code. Other m68knommu CPU varients do not need use this code
though, so it doesn't make sense to move it to arch/m68knommu/kernel.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/m68knommu/platform/5307/timers.c')
-rw-r--r-- | arch/m68knommu/platform/5307/timers.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/arch/m68knommu/platform/5307/timers.c b/arch/m68knommu/platform/5307/timers.c deleted file mode 100644 index 489dec85c85..00000000000 --- a/arch/m68knommu/platform/5307/timers.c +++ /dev/null @@ -1,155 +0,0 @@ -/***************************************************************************/ - -/* - * timers.c -- generic ColdFire hardware timer support. - * - * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com) - */ - -/***************************************************************************/ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <asm/io.h> -#include <asm/traps.h> -#include <asm/machdep.h> -#include <asm/coldfire.h> -#include <asm/mcftimer.h> -#include <asm/mcfsim.h> - -/***************************************************************************/ - -/* - * By default use timer1 as the system clock timer. - */ -#define TA(a) (MCF_MBAR + MCFTIMER_BASE1 + (a)) - -/* - * 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; - -/* - * 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); - -#if defined(CONFIG_M532x) -#define __raw_readtrr __raw_readl -#define __raw_writetrr __raw_writel -#else -#define __raw_readtrr __raw_readw -#define __raw_writetrr __raw_writew -#endif - -/***************************************************************************/ - -static irqreturn_t hw_tick(int irq, void *dummy) -{ - /* Reset the ColdFire timer */ - __raw_writeb(MCFTIMER_TER_CAP | MCFTIMER_TER_REF, TA(MCFTIMER_TER)); - - return arch_timer_interrupt(irq, dummy); -} - -/***************************************************************************/ - -static struct irqaction coldfire_timer_irq = { - .name = "timer", - .flags = IRQF_DISABLED | IRQF_TIMER, - .handler = hw_tick, -}; - -/***************************************************************************/ - -static int ticks_per_intr; - -void hw_timer_init(void) -{ - setup_irq(mcf_timervector, &coldfire_timer_irq); - - __raw_writew(MCFTIMER_TMR_DISABLE, TA(MCFTIMER_TMR)); - ticks_per_intr = (MCF_BUSCLK / 16) / HZ; - __raw_writetrr(ticks_per_intr - 1, TA(MCFTIMER_TRR)); - __raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 | - MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, TA(MCFTIMER_TMR)); - - mcf_settimericr(1, mcf_timerlevel); - -#ifdef CONFIG_HIGHPROFILE - coldfire_profile_init(); -#endif -} - -/***************************************************************************/ - -unsigned long hw_timer_offset(void) -{ - unsigned long tcn, offset; - - tcn = __raw_readw(TA(MCFTIMER_TCN)); - offset = ((tcn + 1) * (1000000 / HZ)) / ticks_per_intr; - - /* 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 -/***************************************************************************/ - -/* - * By default use timer2 as the profiler clock timer. - */ -#define PA(a) (MCF_MBAR + MCFTIMER_BASE2 + (a)) - -/* - * Choose a reasonably fast profile timer. Make it an odd value to - * try and get good coverage of kernel operations. - */ -#define PROFILEHZ 1013 - -/* - * Use the other timer to provide high accuracy profiling info. - */ -irqreturn_t coldfire_profile_tick(int irq, void *dummy) -{ - /* Reset ColdFire timer2 */ - __raw_writeb(MCFTIMER_TER_CAP | MCFTIMER_TER_REF, PA(MCFTIMER_TER)); - if (current->pid) - profile_tick(CPU_PROFILING, regs); - return IRQ_HANDLED; -} - -/***************************************************************************/ - -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 */ - __raw_writew(MCFTIMER_TMR_DISABLE, PA(MCFTIMER_TMR)); - - __raw_writetrr(((MCF_CLK / 16) / PROFILEHZ), PA(MCFTIMER_TRR)); - __raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 | - MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, PA(MCFTIMER_TMR)); - - request_irq(mcf_profilevector, coldfire_profile_tick, - (IRQF_DISABLED | IRQ_FLG_FAST), "profile timer", NULL); - mcf_settimericr(2, 7); -} - -/***************************************************************************/ -#endif /* CONFIG_HIGHPROFILE */ -/***************************************************************************/ |