path: root/sys/dev/exca/excareg.h

/*	$NetBSD: i82365reg.h,v 1.3 1998/12/20 17:53:28 nathanw Exp $	*/
/* $FreeBSD$ */

/*-
 * Copyright (c) 2002 M Warner Losh.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * This software may be derived from NetBSD i82365.c and other files with
 * the following copyright:
 *
 * Copyright (c) 1997 Marc Horowitz.  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 Marc Horowitz.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#ifndef _SYS_DEV_EXCA_EXCAREG_H
#define _SYS_DEV_EXCA_EXCAREG_H

/*
 * All information is from the intel 82365sl PC Card Interface Controller
 * (PCIC) data sheet, marked "preliminary".  Order number 290423-002, January
 * 1993.
 */

#define	EXCA_IOSIZE		2

#define	EXCA_REG_INDEX		0
#define	EXCA_REG_DATA		1

#define EXCA_NSLOTS		4	/* 2 in 2 chips */

/*
 * I/o ports
 */
#define EXCA_INDEX0		0x3e0

/*
 * The PCIC allows two chips to share the same address.  In order not to run
 * afoul of the bsd device model, this driver will treat those chips as
 * the same device.
 */

#define	EXCA_CHIP0_BASE		0x00
#define	EXCA_CHIP1_BASE		0x80

/* Each PCIC chip can drive two sockets */

#define EXCA_SOCKET_SIZE	0x40
#define	EXCA_SOCKETA_INDEX	0x00
#define	EXCA_SOCKETB_INDEX	EXCA_SOCKET_SIZE

/* general setup registers */

#define	EXCA_IDENT				0x00	/* RO */
#define	EXCA_IDENT_IFTYPE_MASK			0xC0
#define	EXCA_IDENT_IFTYPE_IO_ONLY		0x00
#define	EXCA_IDENT_IFTYPE_MEM_ONLY		0x40
#define	EXCA_IDENT_IFTYPE_MEM_AND_IO		0x80
#define	EXCA_IDENT_IFTYPE_RESERVED		0xC0
#define	EXCA_IDENT_ZERO				0x30
#define	EXCA_IDENT_REV_MASK			0x0F
#define	EXCA_IDENT_REV_I82365SLR0		0x02	/* step a/b */
#define	EXCA_IDENT_REV_I82365SLR1		0x03	/* step c */
#define	EXCA_IDENT_REV_I82365SLDF		0x04	/* step df */
#define	EXCA_IDENT_REV_IBM1			0x08	/* ibm clone */
#define	EXCA_IDENT_REV_IBM2			0x09	/* ibm clone */
#define	EXCA_IDENT_REV_IBM_KING			0x0a	/* ibm king */

#define	EXCA_IF_STATUS				0x01	/* RO */
#define	EXCA_IF_STATUS_GPI			0x80 /* General Purpose Input */
#define	EXCA_IF_STATUS_POWERACTIVE		0x40
#define	EXCA_IF_STATUS_READY			0x20 /* really READY/!BUSY */
#define	EXCA_IF_STATUS_MEM_WP			0x10
#define	EXCA_IF_STATUS_CARDDETECT_MASK		0x0C
#define	EXCA_IF_STATUS_CARDDETECT_PRESENT	0x0C
#define	EXCA_IF_STATUS_BATTERY_MASK		0x03
#define	EXCA_IF_STATUS_BATTERY_DEAD1		0x00
#define	EXCA_IF_STATUS_BATTERY_DEAD2		0x01
#define	EXCA_IF_STATUS_BATTERY_WARNING		0x02
#define	EXCA_IF_STATUS_BATTERY_GOOD		0x03

#define	EXCA_PWRCTL				0x02	/* RW */
#define	EXCA_PWRCTL_OE				0x80	/* output enable */
#define	EXCA_PWRCTL_DISABLE_RESETDRV		0x40
#define	EXCA_PWRCTL_AUTOSWITCH_ENABLE		0x20
#define	EXCA_PWRCTL_PWR_ENABLE			0x10
#define	EXCA_PWRCTL_VPP2_MASK			0x0C
/* XXX these are a little unclear from the data sheet */
#define	EXCA_PWRCTL_VPP2_RESERVED		0x0C
#define	EXCA_PWRCTL_VPP2_EN1			0x08
#define	EXCA_PWRCTL_VPP2_EN0			0x04
#define	EXCA_PWRCTL_VPP2_ENX			0x00
#define	EXCA_PWRCTL_VPP1_MASK			0x03
/* XXX these are a little unclear from the data sheet */
#define	EXCA_PWRCTL_VPP1_RESERVED		0x03
#define	EXCA_PWRCTL_VPP1_EN1			0x02
#define	EXCA_PWRCTL_VPP1_EN0			0x01
#define	EXCA_PWRCTL_VPP1_ENX			0x00

#define	EXCA_CSC				0x04	/* RW */
#define	EXCA_CSC_ZERO				0xE0
#define	EXCA_CSC_GPI				0x10
#define	EXCA_CSC_CD				0x08 /* Card Detect Change */
#define	EXCA_CSC_READY				0x04
#define	EXCA_CSC_BATTWARN			0x02
#define	EXCA_CSC_BATTDEAD			0x01	/* for memory cards */
#define	EXCA_CSC_RI				0x01	/* for i/o cards */

#define	EXCA_ADDRWIN_ENABLE			0x06	/* RW */
#define	EXCA_ADDRWIN_ENABLE_IO1			0x80
#define	EXCA_ADDRWIN_ENABLE_IO0			0x40
#define	EXCA_ADDRWIN_ENABLE_MEMCS16		0x20	/* rtfds if you care */
#define	EXCA_ADDRWIN_ENABLE_MEM4		0x10
#define	EXCA_ADDRWIN_ENABLE_MEM3		0x08
#define	EXCA_ADDRWIN_ENABLE_MEM2		0x04
#define	EXCA_ADDRWIN_ENABLE_MEM1		0x02
#define	EXCA_ADDRWIN_ENABLE_MEM0		0x01

#define	EXCA_CARD_DETECT			0x16	/* RW */
#define	EXCA_CARD_DETECT_RESERVED		0xC0
#define	EXCA_CARD_DETECT_SW_INTR		0x20
#define	EXCA_CARD_DETECT_RESUME_ENABLE		0x10
#define	EXCA_CARD_DETECT_GPI_TRANSCTL		0x08
#define	EXCA_CARD_DETECT_GPI_ENABLE		0x04
#define	EXCA_CARD_DETECT_CFGRST_ENABLE		0x02
#define	EXCA_CARD_DETECT_MEMDLY_INHIBIT		0x01

/* interrupt registers */

#define	EXCA_INTR				0x03	/* RW */
#define	EXCA_INTR_RI_ENABLE			0x80
#define	EXCA_INTR_RESET				0x40	/* active low (zero) */
#define	EXCA_INTR_CARDTYPE_MASK			0x20
#define	EXCA_INTR_CARDTYPE_IO			0x20
#define	EXCA_INTR_CARDTYPE_MEM			0x00
#define	EXCA_INTR_ENABLE			0x10
#define	EXCA_INTR_IRQ_MASK			0x0F
#define	EXCA_INTR_IRQ_SHIFT			0
#define	EXCA_INTR_IRQ_NONE			0x00
#define	EXCA_INTR_IRQ_RESERVED1			0x01
#define	EXCA_INTR_IRQ_RESERVED2			0x02
#define	EXCA_INTR_IRQ3				0x03
#define	EXCA_INTR_IRQ4				0x04
#define	EXCA_INTR_IRQ5				0x05
#define	EXCA_INTR_IRQ_RESERVED6			0x06
#define	EXCA_INTR_IRQ7				0x07
#define	EXCA_INTR_IRQ_RESERVED8			0x08
#define	EXCA_INTR_IRQ9				0x09
#define	EXCA_INTR_IRQ10				0x0A
#define	EXCA_INTR_IRQ11				0x0B
#define	EXCA_INTR_IRQ12				0x0C
#define	EXCA_INTR_IRQ_RESERVED13		0x0D
#define	EXCA_INTR_IRQ14				0x0E
#define	EXCA_INTR_IRQ15				0x0F

#define	EXCA_INTR_IRQ_VALIDMASK			0xDEB8 /* 1101 1110 1011 1000 */

#define	EXCA_CSC_INTR				0x05	/* RW */
#define	EXCA_CSC_INTR_IRQ_MASK			0xF0
#define	EXCA_CSC_INTR_IRQ_SHIFT			4
#define	EXCA_CSC_INTR_IRQ_NONE			0x00
#define	EXCA_CSC_INTR_IRQ_RESERVED1		0x10
#define	EXCA_CSC_INTR_IRQ_RESERVED2		0x20
#define	EXCA_CSC_INTR_IRQ3			0x30
#define	EXCA_CSC_INTR_IRQ4			0x40
#define	EXCA_CSC_INTR_IRQ5			0x50
#define	EXCA_CSC_INTR_IRQ_RESERVED6		0x60
#define	EXCA_CSC_INTR_IRQ7			0x70
#define	EXCA_CSC_INTR_IRQ_RESERVED8		0x80
#define	EXCA_CSC_INTR_IRQ9			0x90
#define	EXCA_CSC_INTR_IRQ10			0xA0
#define	EXCA_CSC_INTR_IRQ11			0xB0
#define	EXCA_CSC_INTR_IRQ12			0xC0
#define	EXCA_CSC_INTR_IRQ_RESERVED13		0xD0
#define	EXCA_CSC_INTR_IRQ14			0xE0
#define	EXCA_CSC_INTR_IRQ15			0xF0
#define	EXCA_CSC_INTR_CD_ENABLE			0x08
#define	EXCA_CSC_INTR_READY_ENABLE		0x04
#define	EXCA_CSC_INTR_BATTWARN_ENABLE		0x02
#define	EXCA_CSC_INTR_BATTDEAD_ENABLE		0x01	/* for memory cards */
#define	EXCA_CSC_INTR_RI_ENABLE			0x01	/* for I/O cards */

#define	EXCA_CSC_INTR_IRQ_VALIDMASK		0xDEB8 /* 1101 1110 1011 1000 */

/* I/O registers */

#define	EXCA_IO_WINS				2

#define	EXCA_IOCTL				0x07	/* RW */
#define	EXCA_IOCTL_IO1_WAITSTATE		0x80
#define	EXCA_IOCTL_IO1_ZEROWAIT			0x40
#define	EXCA_IOCTL_IO1_IOCS16SRC_MASK		0x20
#define	EXCA_IOCTL_IO1_IOCS16SRC_CARD		0x20
#define	EXCA_IOCTL_IO1_IOCS16SRC_DATASIZE	0x00
#define	EXCA_IOCTL_IO1_DATASIZE_MASK		0x10
#define	EXCA_IOCTL_IO1_DATASIZE_16BIT		0x10
#define	EXCA_IOCTL_IO1_DATASIZE_8BIT		0x00
#define	EXCA_IOCTL_IO0_WAITSTATE		0x08
#define	EXCA_IOCTL_IO0_ZEROWAIT			0x04
#define	EXCA_IOCTL_IO0_IOCS16SRC_MASK		0x02
#define	EXCA_IOCTL_IO0_IOCS16SRC_CARD		0x02
#define	EXCA_IOCTL_IO0_IOCS16SRC_DATASIZE	0x00
#define	EXCA_IOCTL_IO0_DATASIZE_MASK		0x01
#define	EXCA_IOCTL_IO0_DATASIZE_16BIT		0x01
#define	EXCA_IOCTL_IO0_DATASIZE_8BIT		0x00

#define	EXCA_IOADDR0_START_LSB			0x08
#define	EXCA_IOADDR0_START_MSB			0x09
#define	EXCA_IOADDR0_STOP_LSB			0x0A
#define	EXCA_IOADDR0_STOP_MSB			0x0B
#define	EXCA_IOADDR1_START_LSB			0x0C
#define	EXCA_IOADDR1_START_MSB			0x0D
#define	EXCA_IOADDR1_STOP_LSB			0x0E
#define	EXCA_IOADDR1_STOP_MSB			0x0F

/* memory registers */

/*
 * memory window addresses refer to bits A23-A12 of the ISA system memory
 * address.  This is a shift of 12 bits.  The LSB contains A19-A12, and the
 * MSB contains A23-A20, plus some other bits.
 */

#define	EXCA_MEM_WINS				5

#define	EXCA_MEM_SHIFT				12
#define	EXCA_MEM_PAGESIZE			(1<<EXCA_MEM_SHIFT)

#define	EXCA_SYSMEM_ADDRX_SHIFT				EXCA_MEM_SHIFT
#define	EXCA_SYSMEM_ADDRX_START_MSB_DATASIZE_MASK	0x80
#define	EXCA_SYSMEM_ADDRX_START_MSB_DATASIZE_16BIT	0x80
#define	EXCA_SYSMEM_ADDRX_START_MSB_DATASIZE_8BIT	0x00
#define	EXCA_SYSMEM_ADDRX_START_MSB_ZEROWAIT		0x40
#define	EXCA_SYSMEM_ADDRX_START_MSB_SCRATCH_MASK	0x30
#define	EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK		0x0F

#define	EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT_MASK		0xC0
#define	EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT0		0x00
#define	EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT1		0x40
#define	EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2		0x80
#define	EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT3		0xC0
#define	EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK		0x0F

/*
 * The card side of a memory mapping consists of bits A19-A12 of the card
 * memory address in the LSB, and A25-A20 plus some other bits in the MSB.
 * Again, the shift is 12 bits.
 */

#define	EXCA_CARDMEM_ADDRX_SHIFT		EXCA_MEM_SHIFT
#define	EXCA_CARDMEM_ADDRX_MSB_WP		0x80
#define	EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_MASK	0x40
#define	EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR	0x40
#define	EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_COMMON	0x00
#define	EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK	0x3F

#define	EXCA_SYSMEM_ADDR0_START_LSB		0x10
#define	EXCA_SYSMEM_ADDR0_START_MSB		0x11
#define	EXCA_SYSMEM_ADDR0_STOP_LSB		0x12
#define	EXCA_SYSMEM_ADDR0_STOP_MSB		0x13

#define	EXCA_CARDMEM_ADDR0_LSB			0x14
#define	EXCA_CARDMEM_ADDR0_MSB			0x15

/* #define	EXCA_RESERVED			0x17 */

#define	EXCA_SYSMEM_ADDR1_START_LSB		0x18
#define	EXCA_SYSMEM_ADDR1_START_MSB		0x19
#define	EXCA_SYSMEM_ADDR1_STOP_LSB		0x1A
#define	EXCA_SYSMEM_ADDR1_STOP_MSB		0x1B

#define	EXCA_CARDMEM_ADDR1_LSB			0x1C
#define	EXCA_CARDMEM_ADDR1_MSB			0x1D

#define	EXCA_SYSMEM_ADDR2_START_LSB		0x20
#define	EXCA_SYSMEM_ADDR2_START_MSB		0x21
#define	EXCA_SYSMEM_ADDR2_STOP_LSB		0x22
#define	EXCA_SYSMEM_ADDR2_STOP_MSB		0x23

#define	EXCA_CARDMEM_ADDR2_LSB			0x24
#define	EXCA_CARDMEM_ADDR2_MSB			0x25

/* #define	EXCA_RESERVED			0x26 */
/* #define	EXCA_RESERVED			0x27 */

#define	EXCA_SYSMEM_ADDR3_START_LSB		0x28
#define	EXCA_SYSMEM_ADDR3_START_MSB		0x29
#define	EXCA_SYSMEM_ADDR3_STOP_LSB		0x2A
#define	EXCA_SYSMEM_ADDR3_STOP_MSB		0x2B

#define	EXCA_CARDMEM_ADDR3_LSB			0x2C
#define	EXCA_CARDMEM_ADDR3_MSB			0x2D

/* #define	EXCA_RESERVED			0x2E */
/* #define	EXCA_RESERVED			0x2F */

#define	EXCA_SYSMEM_ADDR4_START_LSB		0x30
#define	EXCA_SYSMEM_ADDR4_START_MSB		0x31
#define	EXCA_SYSMEM_ADDR4_STOP_LSB		0x32
#define	EXCA_SYSMEM_ADDR4_STOP_MSB		0x33

#define	EXCA_CARDMEM_ADDR4_LSB			0x34
#define	EXCA_CARDMEM_ADDR4_MSB			0x35

/* #define	EXCA_RESERVED			0x36 */
/* #define	EXCA_RESERVED			0x37 */
/* #define	EXCA_RESERVED			0x38 */
/* #define	EXCA_RESERVED			0x39 */
/* #define	EXCA_RESERVED			0x3A */
/* #define	EXCA_RESERVED			0x3B */
/* #define	EXCA_RESERVED			0x3C */
/* #define	EXCA_RESERVED			0x3D */
/* #define	EXCA_RESERVED			0x3E */
/* #define	EXCA_RESERVED			0x3F */

/* cardbus extensions - memory window page registers */

#define	EXCA_MEMREG_WIN_SHIFT			24
#define	EXCA_SYSMEM_ADDR0_WIN			0x40
#define	EXCA_SYSMEM_ADDR1_WIN			0x41
#define	EXCA_SYSMEM_ADDR2_WIN			0x42
#define	EXCA_SYSMEM_ADDR3_WIN			0x43
#define	EXCA_SYSMEM_ADDR4_WIN			0x44

/* vendor-specific registers */

#define	EXCA_INTEL_GLOBAL_CTL			0x1E	/* RW */
#define	EXCA_INTEL_GLOBAL_CTL_RESERVED		0xF0
#define	EXCA_INTEL_GLOBAL_CTL_IRQ14PULSE_ENABLE	0x08
#define	EXCA_INTEL_GLOBAL_CTL_EXPLICIT_CSC_ACK	0x04
#define	EXCA_INTEL_GLOBAL_CTL_IRQLEVEL_ENABLE	0x02
#define	EXCA_INTEL_GLOBAL_CTL_POWERDOWN		0x01

#define	EXCA_CIRRUS_MISC_CTL_2			0x1E
#define	EXCA_CIRRUS_MISC_CTL_2_SUSPEND		0x04

#define	EXCA_CIRRUS_CHIP_INFO			0x1F
#define	EXCA_CIRRUS_CHIP_INFO_CHIP_ID		0xC0
#define	EXCA_CIRRUS_CHIP_INFO_SLOTS		0x20
#define	EXCA_CIRRUS_CHIP_INFO_REV		0x1F

#define EXCA_CIRRUS_EXTENDED_INDEX		0x2E
#define EXCA_CIRRUS_EXTENDED_DATA		0x2F
#define EXCA_CIRRUS_EXT_CONTROL_1		0x03
#define EXCA_CIRRUS_EXT_CONTROL_1_PCI_INTR_MASK	0x18

#define EXCA_VADEM_VMISC			0x3a
#define EXCA_VADEM_REV				0x40
#define EXCA_VADEM_COOKIE1			0x0E
#define EXCA_VADEM_COOKIE2			0x37

#define EXCA_RICOH_ID				0x3a
#define EXCA_RID_296				0x32
#define EXCA_RID_396				0xb2

/*
 * o2 micro specific registers
 */
#define EXCA_O2MICRO_CTRL_C			0x3a
#define EXCA_O2CC_IREQ_INTC			0x80
#define EXCA_O2CC_STSCHG_INTC			0x20

/*
 * TOPIC specific registers
 */
#define EXCA_TOPIC97_CTRL			0x3e
#define EXCA_TOPIC97_CTRL_LV_MASK		0x03

/* Plug and play */
#define EXCA_PNP_ACTIONTEC	0x1802A904	/* AEI0218 */
#define EXCA_PNP_IBM3765	0x65374d24	/* IBM3765 */
#define EXCA_PNP_82365		0x000ED041	/* PNP0E00 */
#define EXCA_PNP_CL_PD6720	0x010ED041	/* PNP0E01 */
#define EXCA_PNP_VLSI_82C146	0x020ED041	/* PNP0E02 */
#define EXCA_PNP_82365_CARDBUS	0x030ED041	/* PNP0E03 */
#define EXCA_PNP_SCM_SWAPBOX	0x69046d4c	/* SMC0469 */

/* C-Bus PnP Definitions */
#define EXCA_NEC_PC9801_102	0x9180a3b8	/* NEC8091 PC-9801-102 */
#define	EXCA_NEC_PC9821RA_E01	0x2181a3b8	/* NEC8121 PC-9821RA-E01 */

/*
 *	Mask of allowable interrupts.
 *
 *	For IBM-AT machines, irqs 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 are
 *	allowed.  Nearly all IBM-AT machines with pcic cards or bridges
 *	wire these interrupts (or a subset thereof) to the corresponding
 *	pins on the ISA bus.  Some older laptops are reported to not route
 *	all the interrupt pins to the bus because the designers knew that
 *	some would conflict with builtin devices.  Older versions of Windows
 *	NT had a special device that would probe for conflicts early in the
 *	boot process and formulate a mapping table.  Maybe we should do
 *	something similar.
 *
 *	For NEC PC-98 machines, irq 3, 5, 6, 9, 10, 11, 12, 13 are allowed.
 *	These correspond to the C-BUS signals INT 0, 1, 2, 3, 41, 42, 5, 6
 *	respectively.
 *
 *	Hiroshi TSUKADA-san writes in FreeBSD98-testers that CBUS INT 2
 *	(mapped to IRQ 6) is routed to the IRQ 7 pin of the pcic in pc98
 *	cbus add-in cards.  He has confirmed this routing with a visual
 *	inspection of his card or a VOM.
 */
#ifdef PC98
#define	EXCA_INT_MASK_ALLOWED	0x3E68		/* PC98 */
#else
#define	EXCA_INT_MASK_ALLOWED	0xDEB8		/* AT */
#endif

#endif /* !_SYS_DEV_EXCA_EXCAREG_H */