1 files changed, 93 insertions, 0 deletions
diff --git a/contrib/libdha/sysdep/pci_lynx.c b/contrib/libdha/sysdep/pci_lynx.c
new file mode 100644
index 000000000..b698f6308
--- /dev/null
+++ b/contrib/libdha/sysdep/pci_lynx.c
@@ -0,0 +1,93 @@
+/*
+   This file is based on:
+   $XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
+   Modified for readability by Nick Kurshev
+*/
+
+#if defined(Lynx_22)
+#ifndef GCCUSESGAS
+#define GCCUSESGAS
+#endif
+
+/* let's mimick the Linux Alpha stuff for LynxOS so we don't have
+ * to change too much code
+ */
+#include <smem.h>
+ 
+static unsigned char *pciConfBase;
+
+static __inline__ void enable_os_io(void)
+{
+    pciConfBase = (unsigned char *) smem_create("PCI-CONF",
+    	    (char *)0x80800000, 64*1024, SM_READ|SM_WRITE);
+    if (pciConfBase == (void *) -1)
+        exit(1);
+}
+
+static __inline__ void disable_os_io(void)
+{
+    smem_create(NULL, (char *) pciConfBase, 0, SM_DETACH);
+    smem_remove("PCI-CONF");
+    pciConfBase = NULL;
+}
+
+#include <smem.h>
+ 
+static unsigned char *pciConfBase;
+ 
+static __inline__ unsigned long
+static swapl(unsigned long val)
+{
+	unsigned char *p = (unsigned char *)&val;
+	return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | (p[0] << 0));
+}
+ 
+ 
+#define BUS(tag) (((tag)>>16)&0xff)
+#define DFN(tag) (((tag)>>8)&0xff)
+ 
+#define PCIBIOS_DEVICE_NOT_FOUND	0x86
+#define PCIBIOS_SUCCESSFUL		0x00
+ 
+static int pciconfig_read(
+          unsigned char bus,
+          unsigned char dev,
+          unsigned char offset,
+          int len,		/* unused, alway 4 */
+          unsigned long *val)
+{
+	unsigned long _val;
+	unsigned long *ptr;
+ 
+	dev >>= 3;
+	if (bus || dev >= 16) {
+		*val = 0xFFFFFFFF;
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	} else {
+		ptr = (unsigned long *)(pciConfBase + ((1<<dev) | offset));
+		_val = swapl(*ptr);
+	}
+	*val = _val;
+	return PCIBIOS_SUCCESSFUL;
+}
+ 
+static int pciconfig_write(
+          unsigned char bus,
+          unsigned char dev,
+          unsigned char offset,
+          int len,		/* unused, alway 4 */
+          unsigned long val)
+{
+	unsigned long _val;
+	unsigned long *ptr;
+ 
+	dev >>= 3;
+	_val = swapl(val);
+	if (bus || dev >= 16) {
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	} else {
+		ptr = (unsigned long *)(pciConfBase + ((1<<dev) | offset));
+		*ptr = _val;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}