lib/i386-io-djgpp.h

   1 /*
   2  *      The PCI Library -- Access to i386 I/O ports on DJGPP
   3  *
   4  *      Copyright (c) 2010, 2017 Rudolf Marek <r.marek@assembler.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL v2+
   7  *
   8  *      SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include <pc.h>
  12 #include <dos.h>
  13 #define outb(x,y) outportb(y, x)
  14 #define outw(x,y) outportw(y, x)
  15 #define outl(x,y) outportl(y, x)
  16
  17 #define inb  inportb
  18 #define inw  inportw
  19 #define inl  inportl
  20
  21 static int irq_enabled;
  22
  23 static int
  24 intel_setup_io(struct pci_access *a UNUSED)
  25 {
  26   return 1;
  27 }
  28
  29 static inline void
  30 intel_cleanup_io(struct pci_access *a UNUSED)
  31 {
  32 }
  33
  34 static inline void intel_io_lock(void)
  35 {
  36   asm volatile("" : : : "memory");
  37   irq_enabled = disable();
  38 }
  39
  40 static inline void intel_io_unlock(void)
  41 {
  42   asm volatile("" : : : "memory");
  43   if (irq_enabled) {
  44     enable();
  45   }
  46 }