8673e05a9a
1) Supports PCI to PCI bridge devices (and tries to initialise them, even if the BIOS is brain dead). 2) Supports shared PCI interrupts. Interrupt handlers now MUST return '0' if they found nothing to do, '1' otherwise. New features tested with i486 systems based on the Intel Saturn and a DEC 4channel Ethernet card only, but expected to work on most systems. The option PCI_REMAP has been removed ! Submitted by: Wolfgang Stanglmeier <wolf@kintaro.cologne.de>
98 lines
3.5 KiB
C
98 lines
3.5 KiB
C
/**************************************************************************
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**
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** $Id: pcibus.h,v 1.1 1995/02/01 22:56:47 se Exp $
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**
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** Declarations for pci bus driver.
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**
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** FreeBSD
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**
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**-------------------------------------------------------------------------
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**
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** Copyright (c) 1995 Wolfgang Stanglmeier. All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**
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***************************************************************************
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*/
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#ifndef __PCI_BUS_H__
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#define __PCI_BUS_H__ "pl1 95/03/13"
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/*-----------------------------------------------------------------
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**
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** The following functions are provided by the pci bios.
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** They are used only by the pci configuration.
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**
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** pcibus_setup():
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** Probes for a pci system.
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** Sets pci_maxdevice and pci_mechanism.
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**
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** pcibus_tag():
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** Creates a handle for pci configuration space access.
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** This handle is given to the read/write functions.
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**
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** pcibus_ftag():
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** Creates a modified handle.
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**
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** pcibus_read():
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** Read a long word from the pci configuration space.
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** Requires a tag (from pcitag) and the register
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** number (should be a long word alligned one).
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**
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** pcibus_write():
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** Writes a long word to the pci configuration space.
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** Requires a tag (from pcitag), the register number
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** (should be a long word alligned one), and a value.
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**
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** pcibus_regirq():
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** Register an interupt handler for a pci device.
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** Requires a tag (from pcitag), the register number
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** (should be a long word alligned one), and a value.
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**
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**-----------------------------------------------------------------
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*/
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struct pcibus {
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char *pb_name;
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void (*pb_setup ) (void);
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pcici_t (*pb_tag ) (u_char bus, u_char device, u_char func);
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pcici_t (*pb_ftag ) (pcici_t tag, u_char func);
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u_long (*pb_read ) (pcici_t tag, u_long reg);
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void (*pb_write ) (pcici_t tag, u_long reg, u_long data);
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unsigned pb_maxirq;
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int (*pb_iattach) (int irq, void(*func)(), int arg, unsigned*maskp);
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int (*pb_idetach) (int irq, void(*func)());
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int (*pb_imaskinc)(int irq, unsigned *maskptr);
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int (*pb_imaskexc)(int irq, unsigned *maskptr);
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};
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#define PCI_MAX_IRQ (16)
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/*
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** The following structure should be generated by the driver
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*/
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extern struct linker_set pcibus_set;
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#endif
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