diff options
Diffstat (limited to 'sys/arm/xscale/i8134x/i80321_timer.c')
| -rw-r--r-- | sys/arm/xscale/i8134x/i80321_timer.c | 486 |
1 files changed, 0 insertions, 486 deletions
diff --git a/sys/arm/xscale/i8134x/i80321_timer.c b/sys/arm/xscale/i8134x/i80321_timer.c deleted file mode 100644 index 5dc650568c0a..000000000000 --- a/sys/arm/xscale/i8134x/i80321_timer.c +++ /dev/null @@ -1,486 +0,0 @@ -/* $NetBSD: i80321_timer.c,v 1.7 2003/07/27 04:52:28 thorpej Exp $ */ - -/*- - * Copyright (c) 2001, 2002 Wasabi Systems, Inc. - * All rights reserved. - * - * Written by Jason R. Thorpe for Wasabi Systems, Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed for the NetBSD Project by - * Wasabi Systems, Inc. - * 4. The name of Wasabi Systems, Inc. may not be used to endorse - * or promote products derived from this software without specific prior - * written permission. - * - * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Timer/clock support for the Intel i80321 I/O processor. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/module.h> -#include <sys/time.h> -#include <sys/bus.h> -#include <sys/resource.h> -#include <sys/rman.h> -#include <sys/timetc.h> - -#include <machine/armreg.h> -#include <machine/bus.h> -#include <machine/cpu.h> -#include <machine/frame.h> -#include <machine/resource.h> -#include <machine/intr.h> -#include <arm/xscale/i8134x/i80321reg.h> -#include <arm/xscale/i8134x/i80321var.h> - -#ifdef CPU_XSCALE_81342 -#define ICU_INT_TIMER0 (8) /* XXX: Can't include i81342reg.h because - definitions overrides the ones from i80321reg.h - */ -#endif -#include "opt_timer.h" - -void (*i80321_hardclock_hook)(void) = NULL; -struct i80321_timer_softc { - device_t dev; -} timer_softc; - - -static unsigned i80321_timer_get_timecount(struct timecounter *tc); - - -static uint32_t counts_per_hz; - -#if defined(XSCALE_DISABLE_CCNT) || defined(CPU_XSCALE_81342) -static uint32_t offset; -static uint32_t last = -1; -#endif - -static int ticked = 0; - -#ifndef COUNTS_PER_SEC -#define COUNTS_PER_SEC 200000000 /* 200MHz */ -#endif - -#define COUNTS_PER_USEC (COUNTS_PER_SEC / 1000000) - -static struct timecounter i80321_timer_timecounter = { - i80321_timer_get_timecount, /* get_timecount */ - NULL, /* no poll_pps */ - ~0u, /* counter_mask */ -#if defined(XSCALE_DISABLE_CCNT) || defined(CPU_XSCALE_81342) - COUNTS_PER_SEC, -#else - COUNTS_PER_SEC * 3, /* frequency */ -#endif - "i80321 timer", /* name */ - 1000 /* quality */ -}; - -static int -i80321_timer_probe(device_t dev) -{ - - device_set_desc(dev, "i80321 timer"); - return (0); -} - -static int -i80321_timer_attach(device_t dev) -{ - timer_softc.dev = dev; - - return (0); -} - -static device_method_t i80321_timer_methods[] = { - DEVMETHOD(device_probe, i80321_timer_probe), - DEVMETHOD(device_attach, i80321_timer_attach), - {0, 0}, -}; - -static driver_t i80321_timer_driver = { - "itimer", - i80321_timer_methods, - sizeof(struct i80321_timer_softc), -}; -static devclass_t i80321_timer_devclass; - -DRIVER_MODULE(itimer, iq, i80321_timer_driver, i80321_timer_devclass, 0, 0); - -int clockhandler(void *); - - -static __inline uint32_t -tmr1_read(void) -{ - uint32_t rv; - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mrc p6, 0, %0, c1, c9, 0" -#else - __asm __volatile("mrc p6, 0, %0, c1, c1, 0" -#endif - : "=r" (rv)); - return (rv); -} - -static __inline void -tmr1_write(uint32_t val) -{ - - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c1, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c1, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline uint32_t -tcr1_read(void) -{ - uint32_t rv; - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mrc p6, 0, %0, c3, c9, 0" -#else - __asm __volatile("mrc p6, 0, %0, c3, c1, 0" -#endif - : "=r" (rv)); - return (rv); -} -static __inline void -tcr1_write(uint32_t val) -{ - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c3, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c3, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline void -trr1_write(uint32_t val) -{ - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c5, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c5, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline uint32_t -tmr0_read(void) -{ - uint32_t rv; - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mrc p6, 0, %0, c0, c9, 0" -#else - __asm __volatile("mrc p6, 0, %0, c0, c1, 0" -#endif - : "=r" (rv)); - return (rv); -} - -static __inline void -tmr0_write(uint32_t val) -{ - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c0, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c0, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline uint32_t -tcr0_read(void) -{ - uint32_t rv; - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mrc p6, 0, %0, c2, c9, 0" -#else - __asm __volatile("mrc p6, 0, %0, c2, c1, 0" -#endif - : "=r" (rv)); - return (rv); -} -static __inline void -tcr0_write(uint32_t val) -{ - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c2, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c2, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline void -trr0_write(uint32_t val) -{ - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c4, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c4, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline void -tisr_write(uint32_t val) -{ - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mcr p6, 0, %0, c6, c9, 0" -#else - __asm __volatile("mcr p6, 0, %0, c6, c1, 0" -#endif - : - : "r" (val)); -} - -static __inline uint32_t -tisr_read(void) -{ - int ret; - -#ifdef CPU_XSCALE_81342 - __asm __volatile("mrc p6, 0, %0, c6, c9, 0" : "=r" (ret)); -#else - __asm __volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (ret)); -#endif - return (ret); -} - -static unsigned -i80321_timer_get_timecount(struct timecounter *tc) -{ -#if defined(XSCALE_DISABLE_CCNT) || defined(CPU_XSCALE_81342) - uint32_t cur = tcr0_read(); - - if (cur > last && last != -1) { - offset += counts_per_hz; - if (ticked > 0) - ticked--; - } - if (ticked) { - offset += ticked * counts_per_hz; - ticked = 0; - } - return (counts_per_hz - cur + offset); -#else - uint32_t ret; - - __asm __volatile("mrc p14, 0, %0, c1, c0, 0\n" - : "=r" (ret)); - return (ret); -#endif -} - -/* - * i80321_calibrate_delay: - * - * Calibrate the delay loop. - */ -void -i80321_calibrate_delay(void) -{ - - /* - * Just use hz=100 for now -- we'll adjust it, if necessary, - * in cpu_initclocks(). - */ - counts_per_hz = COUNTS_PER_SEC / 100; - - tmr0_write(0); /* stop timer */ - tisr_write(TISR_TMR0); /* clear interrupt */ - trr0_write(counts_per_hz); /* reload value */ - tcr0_write(counts_per_hz); /* current value */ - - tmr0_write(TMRx_ENABLE|TMRx_RELOAD|TMRx_CSEL_CORE); -} - -/* - * cpu_initclocks: - * - * Initialize the clock and get them going. - */ -void -cpu_initclocks(void) -{ - u_int oldirqstate; - struct resource *irq; - int rid = 0; - void *ihl; - device_t dev = timer_softc.dev; - - if (hz < 50 || COUNTS_PER_SEC % hz) { - printf("Cannot get %d Hz clock; using 100 Hz\n", hz); - hz = 100; - } - tick = 1000000 / hz; /* number of microseconds between interrupts */ - - /* - * We only have one timer available; stathz and profhz are - * always left as 0 (the upper-layer clock code deals with - * this situation). - */ - if (stathz != 0) - printf("Cannot get %d Hz statclock\n", stathz); - stathz = 0; - - if (profhz != 0) - printf("Cannot get %d Hz profclock\n", profhz); - profhz = 0; - - /* Report the clock frequency. */ - - oldirqstate = disable_interrupts(PSR_I); - - irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, -#ifdef CPU_XSCALE_81342 - ICU_INT_TIMER0, ICU_INT_TIMER0, -#else - ICU_INT_TMR0, ICU_INT_TMR0, -#endif - 1, RF_ACTIVE); - if (!irq) - panic("Unable to setup the clock irq handler.\n"); - else - bus_setup_intr(dev, irq, INTR_TYPE_CLK, clockhandler, NULL, - NULL, &ihl); - tmr0_write(0); /* stop timer */ - tisr_write(TISR_TMR0); /* clear interrupt */ - - counts_per_hz = COUNTS_PER_SEC / hz; - - trr0_write(counts_per_hz); /* reload value */ - tcr0_write(counts_per_hz); /* current value */ - tmr0_write(TMRx_ENABLE|TMRx_RELOAD|TMRx_CSEL_CORE); - - tc_init(&i80321_timer_timecounter); - restore_interrupts(oldirqstate); - rid = 0; -#if !defined(XSCALE_DISABLE_CCNT) && !defined(CPU_XSCALE_81342) - /* Enable the clock count register. */ - __asm __volatile("mrc p14, 0, %0, c0, c0, 0\n" : "=r" (rid)); - rid &= ~(1 << 3); - rid |= (1 << 2) | 1; - __asm __volatile("mcr p14, 0, %0, c0, c0, 0\n" - : : "r" (rid)); -#endif -} - - -/* - * DELAY: - * - * Delay for at least N microseconds. - */ -void -DELAY(int n) -{ - uint32_t cur, last, delta, usecs; - - TSENTER(); - /* - * This works by polling the timer and counting the - * number of microseconds that go by. - */ - last = tcr0_read(); - delta = usecs = 0; - - while (n > usecs) { - cur = tcr0_read(); - - /* Check to see if the timer has wrapped around. */ - if (last < cur) - delta += (last + (counts_per_hz - cur)); - else - delta += (last - cur); - - last = cur; - - if (delta >= COUNTS_PER_USEC) { - usecs += delta / COUNTS_PER_USEC; - delta %= COUNTS_PER_USEC; - } - } - TSEXIT(); -} - -/* - * clockhandler: - * - * Handle the hardclock interrupt. - */ -int -clockhandler(void *arg) -{ - struct trapframe *frame = arg; - - ticked++; - tisr_write(TISR_TMR0); - hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame)); - - if (i80321_hardclock_hook != NULL) - (*i80321_hardclock_hook)(); - return (FILTER_HANDLED); -} - -void -cpu_startprofclock(void) -{ -} - -void -cpu_stopprofclock(void) -{ - -} |