6b6096d28b
typical build will now include 880 bytes of PCI support code, compared to 2327 bytes in Etherboot 5.4. (There is a slight cost of around 5 extra bytes per access to a non-constant config space address; this should be an overall win. Driver-specific accesses will usually be to constant addresses, for which there is no additional cost.)
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <gpxe/pci.h>
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#include <pcidirect.h>
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/** @file
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*
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* PCI configuration space access via Type 1 accesses
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*
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*/
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/**
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* Prepare for Type 1 PCI configuration space access
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*
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* @v pci PCI device
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* @v where Location within PCI configuration space
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*/
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void pcidirect_prepare ( struct pci_device *pci, int where ) {
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outl ( ( 0x80000000 | ( pci->bus << 16 ) | ( pci->devfn << 8 ) |
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( where & ~3 ) ), PCIDIRECT_CONFIG_ADDRESS );
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}
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