Add a driver for the watchdog timer on the AMD Geode SC1100.
This commit is contained in:
dyoung
parent
36f0c93a20
commit
65eb42952c
@ -1,4 +1,4 @@
|
||||
# $NetBSD: GENERIC,v 1.700 2005/09/14 08:22:24 tron Exp $
|
||||
# $NetBSD: GENERIC,v 1.701 2005/09/22 07:09:35 dyoung Exp $
|
||||
#
|
||||
# GENERIC machine description file
|
||||
#
|
||||
@ -22,7 +22,7 @@ include "arch/i386/conf/std.i386"
|
||||
|
||||
options INCLUDE_CONFIG_FILE # embed config file in kernel binary
|
||||
|
||||
#ident "GENERIC-$Revision: 1.700 $"
|
||||
#ident "GENERIC-$Revision: 1.701 $"
|
||||
|
||||
maxusers 32 # estimated number of users
|
||||
|
||||
@ -1216,6 +1216,8 @@ joy* at eso? # ESS Solo-1 on-board joystick
|
||||
|
||||
# Miscellaneous Devices
|
||||
|
||||
geodewdog* at pci? dev ? function ? # AMD Geode SC1100 watchdog timer
|
||||
|
||||
# Planetconnect Satellite receiver driver.
|
||||
#satlink0 at isa? port 0x300 drq 1
|
||||
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
# $NetBSD: files.i386,v 1.269 2005/07/03 12:16:05 cube Exp $
|
||||
# $NetBSD: files.i386,v 1.270 2005/09/22 07:09:35 dyoung Exp $
|
||||
#
|
||||
# new style config file for i386 architecture
|
||||
#
|
||||
@ -184,6 +184,11 @@ device elansc: sysmon_wdog
|
||||
attach elansc at pci
|
||||
file arch/i386/pci/elan520.c elansc
|
||||
|
||||
# AMD Geode SC1100 Watchdog Timer
|
||||
device geodewdog: sysmon_wdog
|
||||
attach geodewdog at pci
|
||||
file arch/i386/pci/geode.c geodewdog
|
||||
|
||||
# PCI-EISA bridges
|
||||
device pceb: eisabus, isabus
|
||||
attach pceb at pci
|
||||
|
||||
284
sys/arch/i386/pci/geode.c
Normal file
284
sys/arch/i386/pci/geode.c
Normal file
@ -0,0 +1,284 @@
|
||||
/* $NetBSD: geode.c,v 1.1 2005/09/22 07:09:35 dyoung Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2005 David Young. All rights reserved.
|
||||
*
|
||||
* This code was written by David Young.
|
||||
*
|
||||
* 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 David Young.
|
||||
* 4. The name of David Young may not be used to endorse or promote
|
||||
* products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``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 DAVID
|
||||
* YOUNG 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.
|
||||
*/
|
||||
/*-
|
||||
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Jason R. Thorpe.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Device driver for the watchdog timer built into the
|
||||
* AMD Geode SC1100 processor.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
|
||||
__KERNEL_RCSID(0, "$NetBSD: geode.c,v 1.1 2005/09/22 07:09:35 dyoung Exp $");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/device.h>
|
||||
#include <sys/wdog.h>
|
||||
#include <uvm/uvm_extern.h>
|
||||
#include <machine/bus.h>
|
||||
#include <dev/pci/pcivar.h>
|
||||
#include <dev/pci/pcidevs.h>
|
||||
#include <arch/i386/pci/geodereg.h>
|
||||
#include <dev/sysmon/sysmonvar.h>
|
||||
|
||||
#ifdef GEODE_DEBUG
|
||||
#define GEODE_DPRINTF(__x) printf __x
|
||||
#else /* GEODE_DEBUG */
|
||||
#define GEODE_DPRINTF(__x) /* nothing */
|
||||
#endif
|
||||
|
||||
struct geode_wdog_softc {
|
||||
struct device sc_dev;
|
||||
bus_space_tag_t sc_iot;
|
||||
bus_space_handle_t sc_ioh;
|
||||
uint16_t sc_countdown;
|
||||
uint8_t sc_prescale;
|
||||
|
||||
struct sysmon_wdog sc_smw;
|
||||
};
|
||||
|
||||
static void
|
||||
geode_wdog_disable(struct geode_wdog_softc *sc)
|
||||
{
|
||||
uint16_t wdcnfg;
|
||||
|
||||
/* cancel any pending countdown */
|
||||
sc->sc_countdown = 0;
|
||||
bus_space_write_2(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDTO, 0);
|
||||
/* power-down clock */
|
||||
wdcnfg = bus_space_read_2(sc->sc_iot, sc->sc_ioh,
|
||||
SC1100_GCB_WDCNFG);
|
||||
|
||||
GEODE_DPRINTF(("%s: wdcnfg %#04" PRIx16 " -> ", __func__, wdcnfg));
|
||||
|
||||
wdcnfg |= SC1100_WDCNFG_WD32KPD;
|
||||
wdcnfg &= ~(SC1100_WDCNFG_WDTYPE2_MASK | SC1100_WDCNFG_WDTYPE1_MASK);
|
||||
/* This no-op is for the reader's benefit. */
|
||||
wdcnfg |= SC1100_WDCNFG_WDTYPE1_NOACTION |
|
||||
SC1100_WDCNFG_WDTYPE2_NOACTION;
|
||||
bus_space_write_2(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDCNFG, wdcnfg);
|
||||
|
||||
GEODE_DPRINTF(("%#04" PRIx16 "\n", wdcnfg));
|
||||
}
|
||||
|
||||
static void
|
||||
geode_wdog_enable(struct geode_wdog_softc *sc)
|
||||
{
|
||||
uint16_t wdcnfg;
|
||||
|
||||
/* power-up clock and set prescale */
|
||||
wdcnfg = bus_space_read_2(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDCNFG);
|
||||
|
||||
GEODE_DPRINTF(("%s: wdcnfg %#04" PRIx16 " -> ", __func__, wdcnfg));
|
||||
|
||||
wdcnfg &= ~(SC1100_WDCNFG_WD32KPD | SC1100_WDCNFG_WDPRES_MASK |
|
||||
SC1100_WDCNFG_WDTYPE1_MASK | SC1100_WDCNFG_WDTYPE2_MASK);
|
||||
wdcnfg |= LSHIFT(sc->sc_prescale, SC1100_WDCNFG_WDPRES_MASK);
|
||||
wdcnfg |= SC1100_WDCNFG_WDTYPE1_RESET | SC1100_WDCNFG_WDTYPE2_NOACTION;
|
||||
|
||||
bus_space_write_2(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDCNFG, wdcnfg);
|
||||
|
||||
GEODE_DPRINTF(("%#04" PRIx16 "\n", wdcnfg));
|
||||
}
|
||||
|
||||
static void
|
||||
geode_wdog_reset(struct geode_wdog_softc *sc)
|
||||
{
|
||||
/* set countdown */
|
||||
bus_space_write_2(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDTO,
|
||||
sc->sc_countdown);
|
||||
}
|
||||
|
||||
static int
|
||||
geode_wdog_tickle(struct sysmon_wdog *smw)
|
||||
{
|
||||
int s;
|
||||
struct geode_wdog_softc *sc = smw->smw_cookie;
|
||||
|
||||
s = splhigh();
|
||||
geode_wdog_reset(sc);
|
||||
splx(s);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
geode_wdog_setmode(struct sysmon_wdog *smw)
|
||||
{
|
||||
struct geode_wdog_softc *sc = smw->smw_cookie;
|
||||
uint32_t ticks;
|
||||
int prescale, s;
|
||||
|
||||
if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) {
|
||||
s = splhigh();
|
||||
geode_wdog_disable(sc);
|
||||
splx(s);
|
||||
return 0;
|
||||
}
|
||||
if (smw->smw_period == WDOG_PERIOD_DEFAULT)
|
||||
smw->smw_period = 32;
|
||||
else if (smw->smw_period > SC1100_WDIVL_MAX) /* too big? */
|
||||
return EINVAL;
|
||||
|
||||
GEODE_DPRINTF(("%s: period %u\n", __func__, smw->smw_period));
|
||||
|
||||
ticks = smw->smw_period * SC1100_WDCLK_HZ;
|
||||
|
||||
GEODE_DPRINTF(("%s: ticks0 %" PRIu32 "\n", __func__, ticks));
|
||||
|
||||
for (prescale = 0; ticks > UINT16_MAX; prescale++)
|
||||
ticks /= 2;
|
||||
|
||||
GEODE_DPRINTF(("%s: ticks %" PRIu32 "\n", __func__, ticks));
|
||||
GEODE_DPRINTF(("%s: prescale %d\n", __func__, prescale));
|
||||
|
||||
KASSERT(prescale <= SC1100_WDCNFG_WDPRES_MAX);
|
||||
KASSERT(ticks <= UINT16_MAX);
|
||||
|
||||
s = splhigh();
|
||||
|
||||
sc->sc_prescale = (uint8_t)prescale;
|
||||
sc->sc_countdown = (uint16_t)ticks;
|
||||
|
||||
geode_wdog_enable(sc);
|
||||
|
||||
geode_wdog_reset(sc);
|
||||
|
||||
splx(s);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
geode_wdog_match(struct device *parent, struct cfdata *match, void *aux)
|
||||
{
|
||||
struct pci_attach_args *pa = aux;
|
||||
|
||||
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
|
||||
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_XBUS)
|
||||
return (10); /* XXX beat pchb? -dyoung */
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static void
|
||||
geode_wdog_attach(struct device *parent, struct device *self, void *aux)
|
||||
{
|
||||
struct geode_wdog_softc *sc = (void *) self;
|
||||
struct pci_attach_args *pa = aux;
|
||||
uint32_t cba;
|
||||
uint8_t wdsts;
|
||||
|
||||
printf(": AMD Geode SC1100 Watchdog Timer\n");
|
||||
|
||||
cba = pci_conf_read(pa->pa_pc, pa->pa_tag, SC1100_XBUS_CBA_SCRATCHPAD);
|
||||
sc->sc_iot = pa->pa_iot;
|
||||
if (bus_space_map(sc->sc_iot, (bus_addr_t)cba, SC1100_GCB_SIZE, 0,
|
||||
&sc->sc_ioh) != 0) {
|
||||
printf("%s: unable to map registers\n", sc->sc_dev.dv_xname);
|
||||
return;
|
||||
}
|
||||
|
||||
GEODE_DPRINTF(("%s: mapped %u bytes at %#08" PRIx32 "\n",
|
||||
sc->sc_dev.dv_xname, SC1100_GCB_SIZE, cba));
|
||||
|
||||
/*
|
||||
* Determine cause of the last reset, and issue a warning if it
|
||||
* was due to watchdog expiry.
|
||||
*/
|
||||
wdsts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDSTS);
|
||||
|
||||
GEODE_DPRINTF(("%s: status %#02" PRIx8 "\n", sc->sc_dev.dv_xname,
|
||||
wdsts));
|
||||
|
||||
if (wdsts & SC1100_WDSTS_WDRST)
|
||||
printf("%s: WARNING: LAST RESET DUE TO WATCHDOG EXPIRATION!\n",
|
||||
sc->sc_dev.dv_xname);
|
||||
|
||||
bus_space_write_1(sc->sc_iot, sc->sc_ioh, SC1100_GCB_WDSTS,
|
||||
wdsts & ~SC1100_WDSTS_WDOVF);
|
||||
|
||||
/*
|
||||
* Hook up the watchdog timer.
|
||||
*/
|
||||
sc->sc_smw.smw_name = sc->sc_dev.dv_xname;
|
||||
sc->sc_smw.smw_cookie = sc;
|
||||
sc->sc_smw.smw_setmode = geode_wdog_setmode;
|
||||
sc->sc_smw.smw_tickle = geode_wdog_tickle;
|
||||
sc->sc_smw.smw_period = 32;
|
||||
if (sysmon_wdog_register(&sc->sc_smw) != 0)
|
||||
printf("%s: unable to register watchdog with sysmon\n",
|
||||
sc->sc_dev.dv_xname);
|
||||
|
||||
/* cancel any pending countdown */
|
||||
geode_wdog_disable(sc);
|
||||
}
|
||||
|
||||
CFATTACH_DECL(geodewdog, sizeof(struct geode_wdog_softc),
|
||||
geode_wdog_match, geode_wdog_attach, NULL, NULL);
|
||||
166
sys/arch/i386/pci/geodereg.h
Normal file
166
sys/arch/i386/pci/geodereg.h
Normal file
@ -0,0 +1,166 @@
|
||||
/* $NetBSD: geodereg.h,v 1.1 2005/09/22 07:09:35 dyoung Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2005 David Young. All rights reserved.
|
||||
*
|
||||
* This code was written by David Young.
|
||||
*
|
||||
* 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 David Young.
|
||||
* 4. The name of David Young may not be used to endorse or promote
|
||||
* products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``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 DAVID
|
||||
* YOUNG 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.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Register definitions for the AMD Geode SC1100.
|
||||
*/
|
||||
|
||||
#ifndef _I386_PCI_GEODEREG_H_
|
||||
#define _I386_PCI_GEODEREG_H_
|
||||
|
||||
/* Macros for bit twiddling. */
|
||||
|
||||
#ifndef _BIT_TWIDDLE
|
||||
#define _BIT_TWIDDLE
|
||||
/* nth bit, BIT(0) == 0x1. */
|
||||
#define BIT(n) (((n) == 32) ? 0 : ((u_int32_t) 1 << (n)))
|
||||
|
||||
/* bits m through n, m < n. */
|
||||
#define BITS(m, n) ((BIT(MAX((m), (n)) + 1) - 1) ^ (BIT(MIN((m), (n))) - 1))
|
||||
|
||||
/* find least significant bit that is set */
|
||||
#define LOWEST_SET_BIT(x) ((((x) - 1) & (x)) ^ (x))
|
||||
|
||||
/* for x a power of two and p a non-negative integer, is x a greater power than 2**p? */
|
||||
#define GTEQ_POWER(x, p) (((u_long)(x) >> (p)) != 0)
|
||||
|
||||
#define MASK_TO_SHIFT2(m) (GTEQ_POWER(LOWEST_SET_BIT((m)), 1) ? 1 : 0)
|
||||
|
||||
#define MASK_TO_SHIFT4(m) \
|
||||
(GTEQ_POWER(LOWEST_SET_BIT((m)), 2) \
|
||||
? 2 + MASK_TO_SHIFT2((m) >> 2) \
|
||||
: MASK_TO_SHIFT2((m)))
|
||||
|
||||
#define MASK_TO_SHIFT8(m) \
|
||||
(GTEQ_POWER(LOWEST_SET_BIT((m)), 4) \
|
||||
? 4 + MASK_TO_SHIFT4((m) >> 4) \
|
||||
: MASK_TO_SHIFT4((m)))
|
||||
|
||||
#define MASK_TO_SHIFT16(m) \
|
||||
(GTEQ_POWER(LOWEST_SET_BIT((m)), 8) \
|
||||
? 8 + MASK_TO_SHIFT8((m) >> 8) \
|
||||
: MASK_TO_SHIFT8((m)))
|
||||
|
||||
#define MASK_TO_SHIFT(m) \
|
||||
(GTEQ_POWER(LOWEST_SET_BIT((m)), 16) \
|
||||
? 16 + MASK_TO_SHIFT16((m) >> 16) \
|
||||
: MASK_TO_SHIFT16((m)))
|
||||
|
||||
#define MASK_AND_RSHIFT(x, mask) (((x) & (mask)) >> MASK_TO_SHIFT(mask))
|
||||
#define LSHIFT(x, mask) ((x) << MASK_TO_SHIFT(mask))
|
||||
#define MASK_AND_REPLACE(reg, val, mask) ((reg & ~mask) | LSHIFT(val, mask))
|
||||
#define PRESHIFT(m) MASK_AND_RSHIFT((m), (m))
|
||||
|
||||
#endif /* _BIT_TWIDDLE */
|
||||
|
||||
/* AMD Geode SC1100 X-Bus PCI Configuration Register: General
|
||||
* Configuration Block Scratchpad. Set to 0x00000000 after chip reset.
|
||||
* The BIOS writes the base address of the General Configuration
|
||||
* Block to this register.
|
||||
*/
|
||||
#define SC1100_XBUS_CBA_SCRATCHPAD 0x64
|
||||
|
||||
#define SC1100_GCB_SIZE 64
|
||||
|
||||
/* watchdog timeout register, 16 bits. */
|
||||
#define SC1100_GCB_WDTO 0x00
|
||||
|
||||
/* Watchdog configuration register, 16 bits. */
|
||||
#define SC1100_GCB_WDCNFG 0x02
|
||||
#define SC1100_WDCNFG_RESERVED BITS(15,9) /* write as read */
|
||||
|
||||
/* 32kHz clock power-down, 0: clock is enabled, 1: clock is disabled. */
|
||||
#define SC1100_WDCNFG_WD32KPD BIT(8)
|
||||
|
||||
/* Watchdog event type 1, and type 2
|
||||
*
|
||||
* 00: no action (default after POR# is asserted)
|
||||
* 01: interrupt
|
||||
* 10: SMI
|
||||
* 11: system reset
|
||||
*/
|
||||
#define SC1100_WDCNFG_WDTYPE2_MASK BITS(7,6)
|
||||
#define SC1100_WDCNFG_WDTYPE1_MASK BITS(5,4)
|
||||
|
||||
#define SC1100_WDCNFG_WDTYPE2_NOACTION LSHIFT(0, SC1100_WDCNFG_WDTYPE2_MASK)
|
||||
#define SC1100_WDCNFG_WDTYPE2_INTERRUPT LSHIFT(1, SC1100_WDCNFG_WDTYPE2_MASK)
|
||||
#define SC1100_WDCNFG_WDTYPE2_SMI LSHIFT(2, SC1100_WDCNFG_WDTYPE2_MASK)
|
||||
#define SC1100_WDCNFG_WDTYPE2_RESET LSHIFT(3, SC1100_WDCNFG_WDTYPE2_MASK)
|
||||
|
||||
#define SC1100_WDCNFG_WDTYPE1_NOACTION LSHIFT(0, SC1100_WDCNFG_WDTYPE1_MASK)
|
||||
#define SC1100_WDCNFG_WDTYPE1_INTERRUPT LSHIFT(1, SC1100_WDCNFG_WDTYPE1_MASK)
|
||||
#define SC1100_WDCNFG_WDTYPE1_SMI LSHIFT(2, SC1100_WDCNFG_WDTYPE1_MASK)
|
||||
#define SC1100_WDCNFG_WDTYPE1_RESET LSHIFT(3, SC1100_WDCNFG_WDTYPE1_MASK)
|
||||
|
||||
/* Watchdog timer prescaler
|
||||
*
|
||||
* The prescaler divisor is 2**WDPRES. 1110 (0xe) and 1111 (0xf) are
|
||||
* reserved values.
|
||||
*/
|
||||
#define SC1100_WDCNFG_WDPRES_MASK BITS(3,0)
|
||||
#define SC1100_WDCNFG_WDPRES_MAX 0xd
|
||||
|
||||
/* Watchdog status register, 8 bits. */
|
||||
#define SC1100_GCB_WDSTS 0x04
|
||||
#define SC1100_WDSTS_RESERVED BIT(7,4) /* write as read */
|
||||
/* Set to 1 when watchdog reset is asserted. Read-only. Reset either by
|
||||
* POR# (power-on reset) or by writing writing 0 to WDOVF.
|
||||
*/
|
||||
#define SC1100_WDSTS_WDRST BIT(3)
|
||||
/* Set to 1 when watchdog SMI is asserted. Read-only. Reset either by
|
||||
* POR# (power-on reset) or by writing writing 0 to WDOVF.
|
||||
*/
|
||||
#define SC1100_WDSTS_WDSMI BIT(2)
|
||||
/* Set to 1 when watchdog interrupt is asserted. Read-only. Reset either by
|
||||
* POR# (power-on reset) or by writing writing 0 to WDOVF.
|
||||
*/
|
||||
#define SC1100_WDSTS_WDINT BIT(1)
|
||||
/* Set to 1 when watchdog overflow is asserted. Reset either by
|
||||
* POR# (power-on reset) or by writing writing 1 to this bit.
|
||||
*/
|
||||
#define SC1100_WDSTS_WDOVF BIT(0)
|
||||
|
||||
/*
|
||||
* Helpful constants
|
||||
*/
|
||||
|
||||
/* maximum watchdog interval in seconds */
|
||||
#define SC1100_WDIVL_MAX ((1 << SC1100_WDCNFG_WDPRES_MAX) * \
|
||||
UINT16_MAX / SC1100_WDCLK_HZ)
|
||||
/* watchdog clock rate in Hertz */
|
||||
#define SC1100_WDCLK_HZ 32000
|
||||
|
||||
#endif /* _I386_PCI_GEODEREG_H_ */
|
||||
Loading…
Reference in New Issue
Block a user