com32/lib/pci/writex.c

   1 #include "pci/pci.h"
   2
   3 void BWL(pci_write) (TYPE v, pciaddr_t a)
   4 {
   5   for (;;) {
   6     switch ( __pci_cfg_type ) {
   7     case PCI_CFG_AUTO:
   8       pci_set_config_type(PCI_CFG_AUTO);
   9       break;                    /* Try again */
  10
  11     case PCI_CFG_TYPE1:
  12       {
  13         uint32_t oldcf8;
  14         cli();
  15         oldcf8 = inl(0xcf8);
  16         outl(a, 0xcf8);
  17         BWL(out) (v, 0xcfc + (a & 3));
  18         outl(oldcf8, 0xcf8);
  19         sti();
  20       }
  21       return;
  22
  23     case PCI_CFG_TYPE2:
  24       {
  25         uint8_t oldcf8, oldcfa;
  26
  27         if ( a & (0x10 << 11) )
  28           return;               /* Devices 16-31 not supported */
  29
  30         cli();
  31         oldcf8 = inb(0xcf8);
  32         oldcfa = inb(0xcfa);
  33         outb(0xf0 + ((a >> (8-1)) & 0x0e), 0xcf8);
  34         outb(a >> 16, 0xcfa);
  35         BWL(out) (v, 0xc000 + ((a >> (11-8)) & 0xf00) + (a & 0xff));
  36         outb(oldcf8, 0xcf8);
  37         outb(oldcfa, 0xcfa);
  38         sti();
  39       }
  40       return;
  41
  42     case PCI_CFG_BIOS:
  43       __pci_write_bios(BIOSCALL, v, a);
  44       return;
  45
  46     default:
  47       return;
  48     }
  49   }
  50 }