$NetBSD: patch-aa,v 1.4 2010/06/20 11:06:03 wiz Exp $

--- 915resolution.c.orig	2007-04-15 10:46:56.000000000 +0000
+++ 915resolution.c
@@ -22,11 +22,57 @@
 #include <string.h>
 #include <sys/mman.h>
 #include <fcntl.h>
+#ifdef __linux__
 #include <sys/io.h>
+#endif
+#ifdef __NetBSD__
+#include <machine/pio.h>
+#include <machine/sysarch.h>
+# if defined(__i386__)
+#define iopl(a) i386_iopl(a)
+# elif defined(__x86_64__)
+#define iopl(a) x86_64_iopl(a)
+# endif
+#endif
 #include <unistd.h>
 #include <assert.h>
 
+static uint8_t
+asm_inb(unsigned port)
+{
+	uint8_t data;
+	__asm volatile("inb %w1,%0" : "=a" (data) : "d" (port));
+	return data;
+}
+
+static __inline void
+asm_outb(uint8_t data, unsigned port)
+{
+	__asm volatile("outb %0,%w1" : : "a" (data), "d" (port));
+}
+
+static uint32_t
+asm_inl(unsigned port)
+{
+	uint32_t data;
+	__asm volatile("inl %w1,%0" : "=a" (data) : "d" (port));
+	return data;
+}
 
+static __inline void
+asm_outl(uint32_t data, unsigned port)
+{
+	__asm volatile("outl %0,%w1" : : "a" (data), "d" (port));
+}
+
+#undef	inb
+#undef	outb
+#define	inb asm_inb
+#define	outb asm_outb
+#undef	inl
+#undef	outl
+#define	inl asm_inl
+#define	outl asm_outl
 
 #define NEW(a) ((a *)(calloc(1, sizeof(a))))
 #define FREE(a) (free(a))
@@ -165,7 +211,12 @@ typedef struct {
 void initialize_system(char * filename) {
 
     if (!filename) {
+#if !defined(__FreeBSD__) & !defined(__DragonFly__)
         if (iopl(3) < 0) {
+#else
+        FILE *iof = fopen("/dev/io", "r");
+        if(iof == NULL) {
+#endif
             perror("Unable to obtain the proper IO permissions");
             exit(2);
         }