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[src/trunk]: src/sys/arch/hpcsh new hpcsh clock module.
details: https://anonhg.NetBSD.org/src/rev/9d3d8af4095e
branches: trunk
changeset: 508961:9d3d8af4095e
user: uch <uch%NetBSD.org@localhost>
date: Mon Apr 23 11:22:19 2001 +0000
description:
new hpcsh clock module.
diffstat:
sys/arch/hpcsh/conf/GENERIC | 5 +-
sys/arch/hpcsh/conf/files.hpcsh | 3 +-
sys/arch/hpcsh/hpcsh/autoconf.c | 5 +-
sys/arch/hpcsh/hpcsh/clock.c | 401 ++++++++++++++++++++++++++++++++++++++++
sys/arch/hpcsh/hpcsh/machdep.c | 27 +-
5 files changed, 421 insertions(+), 20 deletions(-)
diffs (truncated from 544 to 300 lines):
diff -r 7f7a8d43082b -r 9d3d8af4095e sys/arch/hpcsh/conf/GENERIC
--- a/sys/arch/hpcsh/conf/GENERIC Mon Apr 23 11:20:41 2001 +0000
+++ b/sys/arch/hpcsh/conf/GENERIC Mon Apr 23 11:22:19 2001 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.1 2001/03/20 16:05:42 uch Exp $
+# $NetBSD: GENERIC,v 1.2 2001/04/23 11:22:19 uch Exp $
#
# GENERIC kernel for SH3+HD64461 based machines.
#
@@ -17,12 +17,9 @@
options KTRACE # system call tracing support
options MSGBUFSIZE=65534
-#options USE_RTCCLK
-
# Standard system options
options RTC_OFFSET=-540 # hardware clock is this many mins. west of GMT
-options HZ=50 # clock interrupt generates every 1/HZ sec
# Compatibility options
options COMPAT_43
diff -r 7f7a8d43082b -r 9d3d8af4095e sys/arch/hpcsh/conf/files.hpcsh
--- a/sys/arch/hpcsh/conf/files.hpcsh Mon Apr 23 11:20:41 2001 +0000
+++ b/sys/arch/hpcsh/conf/files.hpcsh Mon Apr 23 11:22:19 2001 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.hpcsh,v 1.10 2001/03/20 16:05:42 uch Exp $
+# $NetBSD: files.hpcsh,v 1.11 2001/04/23 11:22:19 uch Exp $
#
maxpartitions 8
@@ -6,6 +6,7 @@
file arch/hpcsh/hpcsh/conf.c
file arch/hpcsh/hpcsh/machdep.c
+file arch/hpcsh/hpcsh/clock.c
file arch/hpcsh/hpcsh/console.c
file arch/hpcsh/hpcsh/autoconf.c
file arch/hpcsh/hpcsh/bus_space.c
diff -r 7f7a8d43082b -r 9d3d8af4095e sys/arch/hpcsh/hpcsh/autoconf.c
--- a/sys/arch/hpcsh/hpcsh/autoconf.c Mon Apr 23 11:20:41 2001 +0000
+++ b/sys/arch/hpcsh/hpcsh/autoconf.c Mon Apr 23 11:22:19 2001 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: autoconf.c,v 1.3 2001/02/24 20:17:45 uch Exp $ */
+/* $NetBSD: autoconf.c,v 1.4 2001/04/23 11:22:19 uch Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@@ -61,7 +61,6 @@
#include <sys/reboot.h>
#include <sys/device.h>
-#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/config_hook.h>
@@ -87,8 +86,6 @@
config_hook_init();
- startrtclock();
-
if (config_rootfound("mainbus", "mainbus") == NULL)
panic("no mainbus found");
diff -r 7f7a8d43082b -r 9d3d8af4095e sys/arch/hpcsh/hpcsh/clock.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/hpcsh/hpcsh/clock.c Mon Apr 23 11:22:19 2001 +0000
@@ -0,0 +1,401 @@
+/* $NetBSD: clock.c,v 1.1 2001/04/23 11:22:19 uch Exp $ */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * 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 by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 THE FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+
+#include <dev/clock_subr.h>
+
+#include <sh3/rtcreg.h>
+#include <sh3/tmureg.h>
+
+#include <machine/shbvar.h>
+
+#include <hpcsh/hpcsh/clockvar.h>
+
+#ifndef HZ
+#define HZ 64
+#endif
+#define MINYEAR 2001 /* "today" */
+#define RTC_CLOCK 16384 /* Hz */
+
+/*
+ * hpcsh clock module
+ * + default 64Hz
+ * + use TMU channel 0 as clock interrupt source.
+ * + TMU channel 0 input source is SH internal RTC output. (1.6384kHz)
+ */
+/* TMU */
+static int clockintr(void *);
+/* RTC */
+static void rtc_init(void);
+static int rtc_gettime(struct clock_ymdhms *);
+static int rtc_settime(struct clock_ymdhms *);
+
+static int __todr_inited;
+static int __cnt_delay; /* calibrated loop variable (1 us) */
+static u_int32_t __cnt_clock; /* clock interrupt interval count */
+static int __cpuclock;
+static int __pclock;
+
+/*
+ * [...]
+ * add IF ID EX MA WB
+ * nop IF ID EX MA WB
+ * cmp/pl IF ID EX MA WB - -
+ * nop IF ID EX MA - - WB
+ * bt IF ID EX . . MA WB
+ * nop IF ID - - EX MA WB
+ * nop IF - - ID EX MA WB
+ * nop - - - IF ID EX MA WB
+ * add IF ID EX MA WB
+ * nop IF ID EX MA WB
+ * cmp/pl IF ID EX MA WB - -
+ * nop IF ID EX MA - - WB
+ * bt IF ID EX . . MA
+ * [...]
+ */
+#define DELAY_LOOP(x) \
+ __asm__ __volatile__(" \
+ mov.l r0, @-r15; \
+ mov %0, r0; \
+ nop;nop;nop;nop; \
+ 1: nop; /* 1 */ \
+ nop; /* 2 */ \
+ nop; /* 3 */ \
+ add #-1, r0; /* 4 */ \
+ nop; /* 5 */ \
+ cmp/pl r0; /* 6 */ \
+ nop; /* 7 */ \
+ bt 1b; /* 8, 9, 10 */ \
+ mov.l @r15+, r0; \
+ " :: "r"(x))
+
+/*
+ * Estimate CPU and Peripheral clock.
+ */
+void
+clock_init()
+{
+#define TMU_START(x) \
+({ \
+ SHREG_TSTR &= ~TSTR_STR ## x; \
+ SHREG_TCNT ## x = 0xffffffff; \
+ SHREG_TSTR |= TSTR_STR ## x; \
+})
+#define TMU_ELAPSED(x) \
+ (0xffffffff - SHREG_TCNT ## x)
+
+ u_int32_t t0, t1;
+
+ /* initialize TMU */
+ SHREG_TCR0 = 0;
+ SHREG_TCR1 = 0;
+ SHREG_TCR2 = 0;
+
+ /* stop all counter */
+ SHREG_TSTR = 0;
+ /* set TMU channel 0 source to RTC counter clock (16.384kHz) */
+ SHREG_TCR0 = TCR_TPSC_RTC;
+
+ /*
+ * estimate CPU clock.
+ */
+ TMU_START(0);
+ DELAY_LOOP(10000000);
+ t0 = TMU_ELAPSED(0);
+ __cpuclock = (100000000 / t0) * RTC_CLOCK;
+ __cnt_delay = (RTC_CLOCK * 10) / t0;
+
+ /*
+ * estimate PCLOCK
+ */
+ /* set TMU channel 1 source to PCLOCK / 4 */
+ SHREG_TCR1 = TCR_TPSC_P4;
+ TMU_START(0);
+ TMU_START(1);
+ delay(1000000);
+ t0 = TMU_ELAPSED(0);
+ t1 = TMU_ELAPSED(1);
+
+ __pclock = (t1 / t0) * RTC_CLOCK * 4;
+
+ /* stop all counter */
+ SHREG_TSTR = 0;
+
+ /* Initialize RTC */
+ rtc_init();
+#undef TMU_START
+#undef TMU_ELAPSED
+}
+
+int
+clock_get_cpuclock()
+{
+ return __cpuclock;
+}
+
+int
+clock_get_pclock()
+{
+ return __pclock;
+}
+
+/*
+ * Return the best possible estimate of the time in the timeval to
+ * which tv points.
+ */
+void
+microtime(struct timeval *tv)
+{
+ static struct timeval lasttime;
+
+ int s = splclock();
+ *tv = time;
+ splx(s);
+
+ tv->tv_usec += ((__cnt_clock - SHREG_TCNT0) * 1000000) / RTC_CLOCK;
+ while (tv->tv_usec >= 1000000) {
+ tv->tv_usec -= 1000000;
+ tv->tv_sec++;
+ }
+
+ if (tv->tv_sec == lasttime.tv_sec &&
+ tv->tv_usec <= lasttime.tv_usec &&
+ (tv->tv_usec = lasttime.tv_usec + 1) >= 1000000) {
+ tv->tv_usec -= 1000000;
+ tv->tv_sec++;
+ }
+ lasttime = *tv;
+}
+
+/*
+ * Wait at least `n' usec.
+ */
+void
+delay(int n)
+{
+ DELAY_LOOP(__cnt_delay * n);
+}
+
+/*
+ * Start the clock interrupt.
+ */
+void
+cpu_initclocks()
+{
+ /* set global variables. */
+ hz = HZ;
+ tick = 1000000 / hz;
+
+ /* use TMU channel 0 as clock source. */
+ SHREG_TSTR &= ~TSTR_STR1;
+ SHREG_TCR1 = TCR_UNIE | TCR_TPSC_RTC;
+ __cnt_clock = RTC_CLOCK / hz - 1;
+ SHREG_TCOR1 = __cnt_clock;
+ SHREG_TCNT1 = __cnt_clock;
+ SHREG_TSTR |= TSTR_STR1;
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