/**************************************************************************
**
**  $Id: pcibios.h,v 2.0.0.1 94/08/18 23:05:36 wolf Exp $
**
**  #define   for pci-bus bios functions.
**
**  386bsd / FreeBSD
**
**-------------------------------------------------------------------------
**
** Copyright (c) 1994 Wolfgang Stanglmeier.  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. 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.
**
**-------------------------------------------------------------------------
**
**  $Log:	pcibios.h,v $
**  Revision 2.0.0.1  94/08/18  23:05:36  wolf
**  
**  Copyright message.
**  New function: pci_last_bus().
**  Symbolic names for pci configuration space registers.
**  
**  Revision 2.0  94/07/10  15:53:32  wolf
**  FreeBSD release.
**  
**  Revision 1.0  94/06/07  20:02:23  wolf
**  Beta release.
**  
***************************************************************************
*/

#ifndef __PCIBIOS_H__
#define __PCIBIOS_H__

/*
**	the availability of a pci bus.
**	configuration mode (1 or 2)
**	0 if no pci bus found.
*/

int pci_conf_mode (void);

/*
**	The number of the last available pci bus.
*/

int pci_last_bus  (void);

/*
**	get a "ticket" for accessing a pci device
**	configuration space.
*/

pcici_t pcitag (unsigned char bus,
		unsigned char device,
                unsigned char func);

/*
**	read or write the configuration space.
*/

u_long pci_conf_read  (pcici_t tag, u_long reg		   );
void   pci_conf_write (pcici_t tag, u_long reg, u_long data);


/*
**	Names for PCI configuration space registers.
**	Copied from pcireg.h
*/

#define	PCI_ID_REG			0x00

#define	PCI_COMMAND_STATUS_REG		0x04
#define	PCI_COMMAND_MEM_ENABLE		0x00000002

#define	PCI_MAP_REG_START		0x10
#define	PCI_MAP_REG_END			0x28
#define	PCI_MAP_MEMORY			0x00000000
#define	PCI_MAP_IO			0x00000001
#define	PCI_MAP_MEMORY_TYPE_32BIT	0x00000000
#define	PCI_MAP_MEMORY_TYPE_32BIT_1M	0x00000002
#define	PCI_MAP_MEMORY_TYPE_64BIT	0x00000004
#define	PCI_MAP_MEMORY_TYPE_MASK	0x00000006
#define	PCI_MAP_MEMORY_CACHABLE		0x00000008
#define	PCI_MAP_MEMORY_ADDRESS_MASK	0xfffffff0

#define	PCI_INTERRUPT_REG		0x3c
#define	PCI_INTERRUPT_PIN_MASK		0x0000ff00
#define	PCI_INTERRUPT_PIN_EXTRACT(x)	((((x) & PCI_INTERRUPT_PIN_MASK) >> 8) & 0xff)
#define	PCI_INTERRUPT_LINE_MASK		0x000000ff
#define	PCI_INTERRUPT_LINE_EXTRACT(x)	((((x) & PCI_INTERRUPT_LINE_MASK) >> 0) & 0xff)

#endif