2009-04-13 02:05:42 -05:00
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/* -*- Mode: C; c-basic-offset: 3 -*-
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*
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* pci.h - Simple PCI configuration interface. This implementation
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* only supports type 1 accesses to configuration space,
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* and it ignores the PCI BIOS.
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*
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* This file is part of Metalkit, a simple collection of modules for
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* writing software that runs on the bare metal. Get the latest code
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* at http://svn.navi.cx/misc/trunk/metalkit/
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*
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* Copyright (c) 2008-2009 Micah Dowty
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __PCI_H__
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#define __PCI_H__
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#include "types.h"
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typedef union PCIConfigSpace {
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uint32 words[16];
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struct {
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uint16 vendorId;
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uint16 deviceId;
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uint16 command;
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uint16 status;
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uint16 revisionId;
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uint8 subclass;
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uint8 classCode;
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uint8 cacheLineSize;
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uint8 latTimer;
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uint8 headerType;
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uint8 BIST;
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uint32 BAR[6];
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uint32 cardbusCIS;
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uint16 subsysVendorId;
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uint16 subsysId;
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uint32 expansionRomAddr;
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uint32 reserved0;
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uint32 reserved1;
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uint8 intrLine;
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uint8 intrPin;
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uint8 minGrant;
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uint8 maxLatency;
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};
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} __attribute__ ((__packed__)) PCIConfigSpace;
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typedef struct PCIAddress {
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uint8 bus, device, function;
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} PCIAddress;
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typedef struct PCIScanState {
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uint16 vendorId;
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uint16 deviceId;
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PCIAddress nextAddr;
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PCIAddress addr;
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} PCIScanState;
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2010-08-05 14:55:08 -05:00
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// BAR bits
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#define PCI_CONF_BAR_IO 0x01
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#define PCI_CONF_BAR_64BIT 0x04
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#define PCI_CONF_BAR_PREFETCH 0x08
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2009-04-13 02:05:42 -05:00
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fastcall uint32 PCI_ConfigRead32(const PCIAddress *addr, uint16 offset);
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fastcall uint16 PCI_ConfigRead16(const PCIAddress *addr, uint16 offset);
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fastcall uint8 PCI_ConfigRead8(const PCIAddress *addr, uint16 offset);
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fastcall void PCI_ConfigWrite32(const PCIAddress *addr, uint16 offset, uint32 data);
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fastcall void PCI_ConfigWrite16(const PCIAddress *addr, uint16 offset, uint16 data);
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fastcall void PCI_ConfigWrite8(const PCIAddress *addr, uint16 offset, uint8 data);
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fastcall Bool PCI_ScanBus(PCIScanState *state);
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fastcall Bool PCI_FindDevice(uint16 vendorId, uint16 deviceId, PCIAddress *addrOut);
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fastcall void PCI_SetBAR(const PCIAddress *addr, int index, uint32 value);
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fastcall uint32 PCI_GetBARAddr(const PCIAddress *addr, int index);
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fastcall void PCI_SetMemEnable(const PCIAddress *addr, Bool enable);
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#endif /* __PCI_H__ */
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