1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/libdha/libdha.c b/contrib/libdha/libdha.c
new file mode 100644
index 000000000..73a4387a2
--- /dev/null
+++ b/contrib/libdha/libdha.c
@@ -0,0 +1,99 @@
+/*
+    libgha.c - Library for direct hardware access
+    Copyrights:
+    1996/10/27	- Robin Cutshaw (robin@xfree86.org)
+		  XFree86 3.3.3 implementation
+    1999	- Øyvind Aabling.
+    		  Modified for GATOS/win/gfxdump.
+		  
+    2002	- library implementation by Nick Kurshev
+		- dhahelper and some changes by Alex Beregszaszi
+    
+    supported O/S's:	SVR4, UnixWare, SCO, Solaris,
+			FreeBSD, NetBSD, 386BSD, BSDI BSD/386,
+			Linux, Mach/386, ISC
+			DOS (WATCOM 9.5 compiler), Win9x (with mapdev.vxd)
+    Licence: GPL
+    Original location: www.linuxvideo.org/gatos
+*/
+
+#include "config.h"
+
+#include "libdha.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#ifdef ARCH_ALPHA
+#include <sys/io.h>
+#endif
+#include <unistd.h>
+
+/* instead exit() use libdha_exit, and do the 'mother-application' deinit
+   only in this code */
+void libdha_exit(const char *message, int level)
+{
+    printf("libdha: FATAL: %s\n", message);
+    exit(level); /* FIXME */
+}
+
+#if defined(_WIN32)
+#include "sysdep/libdha_win32.c"
+#elif defined (__EMX__)
+#include "sysdep/libdha_os2.c"
+#else
+
+#if defined(SVR4) || defined(SCO325)
+#  if !(defined(sun) && defined (i386) && defined (SVR4))
+#    define DEV_MEM "/dev/pmem"
+#  elif defined(PowerMAX_OS)
+#    define DEV_MEM "/dev/iomem"
+#  endif
+#  ifdef SCO325
+#   undef DEV_MEM
+#   define DEV_MEM "/dev/mem"
+#  endif
+# endif /* SVR4 */
+
+/* Generic version */
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#ifndef DEV_MEM
+#define DEV_MEM "/dev/mem"
+#endif
+
+#include "kernelhelper/dhahelper.h"
+
+static int devmem_fd=-1;
+static unsigned devmem_locks=0;
+void *map_phys_mem(unsigned long base, unsigned long size)
+{
+#ifdef ARCH_ALPHA
+/* TODO: move it into sysdep */
+  base += bus_base();
+#endif
+  if( devmem_fd == -1)
+  {
+    if ( (devmem_fd = open("/dev/dhahelper",O_RDWR)) < 0)
+    {
+	if ( (devmem_fd = open(DEV_MEM,O_RDWR)) == -1)
+	{
+	    perror("libdha: open(/dev/mem) failed"); 
+	    exit(1);
+	}
+    }
+  }
+  devmem_locks++;
+  return mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,devmem_fd,base) ;
+}
+
+void unmap_phys_mem(void *ptr, unsigned long size)
+{
+  int res=munmap(ptr,size) ;
+  if (res == -1) { perror("libdha: munmap() failed") ; exit(1) ; }
+  devmem_locks--;
+  if(!devmem_locks) { close(devmem_fd); devmem_fd=-1; }
+}
+#endif