lib/libsys/pci_first_dev.c

   1 /*
   2 pci_first_dev.c
   3 */
   4
   5 #include "pci.h"
   6 #include "syslib.h"
   7 #include <minix/sysutil.h>
   8
   9 /*===========================================================================*
  10  *                              pci_first_dev                                *
  11  *===========================================================================*/
  12 int pci_first_dev(devindp, vidp, didp)
  13 int *devindp;
  14 u16_t *vidp;
  15 u16_t *didp;
  16 {
  17         int r;
  18         message m;
  19
  20         m.m_type= BUSC_PCI_FIRST_DEV;
  21         r= sendrec(pci_procnr, &m);
  22         if (r != 0)
  23                 panic("pci_first_dev: can't talk to PCI: %d", r);
  24         if (m.m_type == 1)
  25         {
  26                 *devindp= m.m1_i1;
  27                 *vidp= m.m1_i2;
  28                 *didp= m.m1_i3;
  29 #if DEBUG
  30                 printf("pci_first_dev: got device %d, %04x/%04x\n",
  31                         *devindp, *vidp, *didp);
  32 #endif
  33                 return 1;
  34         }
  35         if (m.m_type != 0)
  36                 panic("pci_first_dev: got bad reply from PCI: %d", m.m_type);
  37
  38 #if DEBUG
  39         printf("pci_first_dev: got nothing\n");
  40 #endif
  41         return 0;
  42 }