include/asm-x86/ide.h

   1 /*
   2  *  Copyright (C) 1994-1996  Linus Torvalds & authors
   3  */
   4
   5 /*
   6  *  This file contains the i386 architecture specific IDE code.
   7  */
   8
   9 #ifndef __ASMi386_IDE_H
  10 #define __ASMi386_IDE_H
  11
  12 #ifdef __KERNEL__
  13
  14
  15 #ifndef MAX_HWIFS
  16 # ifdef CONFIG_BLK_DEV_IDEPCI
  17 #define MAX_HWIFS       10
  18 # else
  19 #define MAX_HWIFS       6
  20 # endif
  21 #endif
  22
  23 static __inline__ int ide_default_irq(unsigned long base)
  24 {
  25         switch (base) {
  26                 case 0x1f0: return 14;
  27                 case 0x170: return 15;
  28                 case 0x1e8: return 11;
  29                 case 0x168: return 10;
  30                 case 0x1e0: return 8;
  31                 case 0x160: return 12;
  32                 default:
  33                         return 0;
  34         }
  35 }
  36
  37 static __inline__ unsigned long ide_default_io_base(int index)
  38 {
  39         /*
  40          *      If PCI is present then it is not safe to poke around
  41          *      the other legacy IDE ports. Only 0x1f0 and 0x170 are
  42          *      defined compatibility mode ports for PCI. A user can
  43          *      override this using ide= but we must default safe.
  44          */
  45         if (no_pci_devices()) {
  46                 switch(index) {
  47                         case 2: return 0x1e8;
  48                         case 3: return 0x168;
  49                         case 4: return 0x1e0;
  50                         case 5: return 0x160;
  51                 }
  52         }
  53         switch (index) {
  54                 case 0: return 0x1f0;
  55                 case 1: return 0x170;
  56                 default:
  57                         return 0;
  58         }
  59 }
  60
  61 #include <asm-generic/ide_iops.h>
  62
  63 #endif /* __KERNEL__ */
  64
  65 #endif /* __ASMi386_IDE_H */