xref: /src/sys/arch/i386/pci/geodereg.h

/*	$NetBSD: geodereg.h,v 1.6 2006/03/08 08:26:50 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_

#include <lib/libkern/libkern.h>

/* 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	SHIFTIN(0, SC1100_WDCNFG_WDTYPE2_MASK)
#define	SC1100_WDCNFG_WDTYPE2_INTERRUPT	SHIFTIN(1, SC1100_WDCNFG_WDTYPE2_MASK)
#define	SC1100_WDCNFG_WDTYPE2_SMI	SHIFTIN(2, SC1100_WDCNFG_WDTYPE2_MASK)
#define	SC1100_WDCNFG_WDTYPE2_RESET	SHIFTIN(3, SC1100_WDCNFG_WDTYPE2_MASK)

#define	SC1100_WDCNFG_WDTYPE1_NOACTION	SHIFTIN(0, SC1100_WDCNFG_WDTYPE1_MASK)
#define	SC1100_WDCNFG_WDTYPE1_INTERRUPT	SHIFTIN(1, SC1100_WDCNFG_WDTYPE1_MASK)
#define	SC1100_WDCNFG_WDTYPE1_SMI	SHIFTIN(2, SC1100_WDCNFG_WDTYPE1_MASK)
#define	SC1100_WDCNFG_WDTYPE1_RESET	SHIFTIN(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 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 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 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 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_ */