mirror of https://github.com/mpv-player/mpv
94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/*
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This file is based on:
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$XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
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Modified for readability by Nick Kurshev
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*/
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#if defined(Lynx_22)
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#ifndef GCCUSESGAS
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#define GCCUSESGAS
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#endif
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/* let's mimick the Linux Alpha stuff for LynxOS so we don't have
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* to change too much code
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*/
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#include <smem.h>
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static unsigned char *pciConfBase;
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static __inline__ void enable_os_io(void)
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{
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pciConfBase = (unsigned char *) smem_create("PCI-CONF",
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(char *)0x80800000, 64*1024, SM_READ|SM_WRITE);
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if (pciConfBase == (void *) -1)
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exit(1);
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}
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static __inline__ void disable_os_io(void)
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{
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smem_create(NULL, (char *) pciConfBase, 0, SM_DETACH);
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smem_remove("PCI-CONF");
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pciConfBase = NULL;
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}
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#include <smem.h>
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static unsigned char *pciConfBase;
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static __inline__ unsigned long
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static swapl(unsigned long val)
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{
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unsigned char *p = (unsigned char *)&val;
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return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | (p[0] << 0));
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}
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#define BUS(tag) (((tag)>>16)&0xff)
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#define DFN(tag) (((tag)>>8)&0xff)
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#define PCIBIOS_DEVICE_NOT_FOUND 0x86
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#define PCIBIOS_SUCCESSFUL 0x00
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static int pciconfig_read(
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unsigned char bus,
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unsigned char dev,
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unsigned char offset,
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int len, /* unused, alway 4 */
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unsigned long *val)
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{
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unsigned long _val;
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unsigned long *ptr;
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dev >>= 3;
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if (bus || dev >= 16) {
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*val = 0xFFFFFFFF;
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return PCIBIOS_DEVICE_NOT_FOUND;
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} else {
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ptr = (unsigned long *)(pciConfBase + ((1<<dev) | offset));
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_val = swapl(*ptr);
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}
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*val = _val;
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return PCIBIOS_SUCCESSFUL;
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}
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static int pciconfig_write(
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unsigned char bus,
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unsigned char dev,
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unsigned char offset,
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int len, /* unused, alway 4 */
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unsigned long val)
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{
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unsigned long _val;
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unsigned long *ptr;
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dev >>= 3;
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_val = swapl(val);
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if (bus || dev >= 16) {
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return PCIBIOS_DEVICE_NOT_FOUND;
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} else {
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ptr = (unsigned long *)(pciConfBase + ((1<<dev) | offset));
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*ptr = _val;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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