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34 lines
767 B
C
34 lines
767 B
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box Probing Tools distribution.
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*
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* Common functions for Watcom C-based tools.
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*
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*
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*
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* Authors: RichardG, <richardg867@gmail.com>
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*
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* Copyright 2021 RichardG.
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*
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*/
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#include <stdint.h>
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#include "wlib.h"
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uint32_t
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pci_cf8(uint8_t bus, uint8_t dev, uint8_t func, uint8_t reg)
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{
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/* Generate a PCI port CF8h dword. */
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multi_t ret;
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ret.u8[3] = 0x80;
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ret.u8[2] = bus;
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ret.u8[1] = dev << 3;
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ret.u8[1] |= func & 7;
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ret.u8[0] = reg & 0xfc;
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return ret.u32;
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}
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