pci_alpha.c

来自「linux下的MPEG1」· C语言 代码 · 共 81 行

/*
   This file is based on:
   $XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
   Modified for readability by Nick Kurshev
*/

static int pci_config_type( void ) { return 1; }

static int pci_get_vendor(
          unsigned char bus,
          unsigned char dev,
          int func)
{
    unsigned long retval;
    pciconfig_read(bus, dev<<3, PCI_ID_REG, 4, &retval);
    return retval;
}

static long pci_config_read_long(
          unsigned char bus,
          unsigned char dev,
          int func, 
          unsigned cmd)
{
    unsigned long retval;
    pciconfig_read(bus, dev<<3, cmd, 4, &retval);
    return retval;
}

static long pci_config_read_word(
          unsigned char bus,
          unsigned char dev,
          int func, 
          unsigned cmd)
{
    unsigned long retval;
    pciconfig_read(bus, dev<<3, cmd, 2, &retval);
    return retval;
}

static long pci_config_read_byte(
          unsigned char bus,
          unsigned char dev,
          int func, 
          unsigned cmd)
{
    unsigned long retval;
    pciconfig_read(bus, dev<<3, cmd, 1, &retval);
    return retval;
}

static void pci_config_write_long(
          unsigned char bus,
          unsigned char dev,
          int func, 
          unsigned cmd,
	  long val)
{
    pciconfig_write(bus, dev<<3, cmd, 4, val);
}

static void pci_config_write_word(
          unsigned char bus,
          unsigned char dev,
          int func, 
          unsigned cmd,
	  long val)
{
    pciconfig_write(bus, dev<<3, cmd, 2, val);
}

static void pci_config_write_byte(
          unsigned char bus,
          unsigned char dev,
          int func, 
          unsigned cmd,
	  long val)
{
    pciconfig_write(bus, dev<<3, cmd, 1, val);
}