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libpayload: Support functions for Geode

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The Geode video driver will require a number of support functions,
including udelay(), PCI bus walking and MSRs.  This adds those functions
in preparation for the actual code.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3231 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Jordan Crouse
2008-04-10 22:50:44 +00:00
parent 30939bdffd
commit 234e87f137
6 changed files with 218 additions and 0 deletions
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61
payloads/libpayload/include/pci.h Normal file
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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 _PCI_H_
#define _PCI_H_
typedef unsigned short pcidev_t;
#define REG_VENDOR_ID 0x00
#define REG_DEVICE_ID 0x04
#define REG_HEADER_TYPE 0x0E
#define REG_PRIMARY_BUS 0x18
#define HEADER_TYPE_NORMAL 0
#define HEADER_TYPE_BRIDGE 1
#define HEADER_TYPE_CARDBUS 2
#define PCIDEV(_b, _d) ((((_b) & 0xFF) << 8) | ((_d) & 0xFF))
#define PCIDEV_BUS(_d) (((_d) >> 8) & 0xFF)
#define PCIDEV_DEVFN(_d) ((_d) & 0xFF)
#define PCI_ADDR(_bus, _dev, _reg) \
(0x80000000 | (_bus << 16) | (_dev << 8) | (_reg & ~3))
void pci_read_dword(unsigned int bus, unsigned int devfn,
unsigned int reg, unsigned int *val);
void pci_read_byte(unsigned int bus, unsigned int devfn,
unsigned int reg, unsigned char *val);
int pci_find_device(unsigned short vid, unsigned short did, pcidev_t *dev);
unsigned int pci_read_resource(pcidev_t dev, int bar);
#endif