1 files changed, 85 insertions, 0 deletions
diff --git a/hw/xfree86/os-support/linux/lnx_pci.c b/hw/xfree86/os-support/linux/lnx_pci.c
new file mode 100644
index 000000000..5477b9130
--- /dev/null
+++ b/hw/xfree86/os-support/linux/lnx_pci.c
@@ -0,0 +1,85 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_pci.c,v 3.9 2003/02/17 15:29:22 dawes Exp $ */
+
+#include <stdio.h>
+#include "X.h"
+#include "os.h"
+#include "xf86.h"
+#include "xf86Priv.h"
+#define XF86_OS_PRIVS
+#include "xf86_OSproc.h"
+#include "xf86Pci.h"
+
+#ifdef __sparc__
+#define PCIADDR_TYPE		long long
+#define PCIADDR_IGNORE_FMT	"%*x"
+#define PCIADDR_FMT		"%llx"
+#else
+#define PCIADDR_TYPE		long
+#define PCIADDR_IGNORE_FMT	"%*x"
+#define PCIADDR_FMT		"%lx"
+#endif
+
+Bool
+xf86GetPciSizeFromOS(PCITAG tag, int index, int* bits)
+{
+    FILE *file;
+    char c[0x200];
+    char *res;
+    unsigned int bus, devfn, dev, fn;
+    unsigned PCIADDR_TYPE size[7];
+    unsigned int num;
+    signed PCIADDR_TYPE Size;
+
+    if (index > 7)
+	return FALSE;
+    
+    if (!(file = fopen("/proc/bus/pci/devices","r")))
+	return FALSE;
+    do {
+	res = fgets(c,0x1ff,file);
+	if (res) {
+	    num = sscanf(res,
+			 /*bus+dev vendorid deviceid irq */
+			 "%02x%02x\t%*04x%*04x\t%*x"
+			 /* 7 PCI resource base addresses */
+			 "\t" PCIADDR_IGNORE_FMT
+			 "\t" PCIADDR_IGNORE_FMT
+			 "\t" PCIADDR_IGNORE_FMT
+			 "\t" PCIADDR_IGNORE_FMT
+			 "\t" PCIADDR_IGNORE_FMT
+			 "\t" PCIADDR_IGNORE_FMT
+			 "\t" PCIADDR_IGNORE_FMT
+			 /* 7 PCI resource sizes, and then optionally a driver name */
+			 "\t" PCIADDR_FMT
+			 "\t" PCIADDR_FMT
+			 "\t" PCIADDR_FMT
+			 "\t" PCIADDR_FMT
+			 "\t" PCIADDR_FMT
+			 "\t" PCIADDR_FMT
+			 "\t" PCIADDR_FMT,
+			 &bus,&devfn,&size[0],&size[1],&size[2],&size[3],
+			 &size[4],&size[5],&size[6]);
+	    if (num != 9) {  /* apparantly not 2.3 style */ 
+		fclose(file);
+		return FALSE;
+	    }
+	    dev = devfn >> 3;
+	    fn = devfn & 0x7;
+	    if (tag == pciTag(bus,dev,fn)) {
+		*bits = 0;
+		if (size[index] != 0) {
+		    Size = size[index] - ((PCIADDR_TYPE) 1);
+		    while (Size & ((PCIADDR_TYPE) 0x01)) {
+			Size = Size >> ((PCIADDR_TYPE) 1);
+			(*bits)++;
+		    }
+		}
+		fclose(file);
+		return TRUE;
+	    }
+	}
+    } while (res);
+
+    fclose(file);
+    return FALSE;
+}