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54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* $NetBSD: pci.c,v 1.2 2008/05/14 13:29:28 tsutsui Exp $ */
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/*-
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* Copyright (c) 2008 Izumi Tsutsui. 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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*
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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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#include <sys/param.h>
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <mips/cpuregs.h>
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#include <cobalt/dev/gtreg.h>
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#include "boot.h"
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#define GT_BASE 0x14000000
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uint32_t
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pcicfgread(uint32_t tag, uint32_t off)
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{
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uint32_t reg;
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volatile uint32_t *pcicfg_addr, *pcicfg_data;
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pcicfg_addr = (uint32_t *)MIPS_PHYS_TO_KSEG1(GT_BASE + GT_PCICFG_ADDR);
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pcicfg_data = (uint32_t *)MIPS_PHYS_TO_KSEG1(GT_BASE + GT_PCICFG_DATA);
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*pcicfg_addr = PCICFG_ENABLE | tag | (off & ~3U);
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reg = *pcicfg_data;
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*pcicfg_addr = 0;
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return reg;
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}
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