Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763851AbYBAHls (ORCPT ); Fri, 1 Feb 2008 02:41:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S935017AbYBAHim (ORCPT ); Fri, 1 Feb 2008 02:38:42 -0500 Received: from rex.snapgear.com ([203.143.235.140]:48061 "EHLO snapgear.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S935028AbYBAHik (ORCPT ); Fri, 1 Feb 2008 02:38:40 -0500 Date: Fri, 1 Feb 2008 17:37:39 +1000 From: Greg Ungerer Message-Id: <200802010737.m117bdaN022701@goober> To: torvalds@linux-foundation.org Subject: [M68KNOMMU 04/06]: move ColdFire timers.c to its own coldfire directory Cc: gerg@uclinux.org, linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10711 Lines: 335 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/***************************************************************************/ - -/* - * 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 */ -/***************************************************************************/ diff -Naurp linux-2.6.24/arch/m68knommu/platform/coldfire/timers.c linux-2.6.24.1/arch/m68knommu/platform/coldfire/timers.c --- linux-2.6.24/arch/m68knommu/platform/coldfire/timers.c 1970-01-01 10:00:00.000000000 +1000 +++ linux-2.6.24.1/arch/m68knommu/platform/coldfire/timers.c 2008-01-25 08:58:37.000000000 +1000 @@ -0,0 +1,155 @@ +/***************************************************************************/ + +/* + * timers.c -- generic ColdFire hardware timer support. + * + * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com) + */ + +/***************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/***************************************************************************/ + +/* + * 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 */ +/***************************************************************************/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/