[IA64] prevent MCA when performing MMIO mmap to PCI config space

[linux-2.6-omap-h63xx.git] / Documentation / ia64 / aliasing-test.c

diff --git a/Documentation/ia64/aliasing-test.c b/Documentation/ia64/aliasing-test.c
index d485256ee1cead1c71b20610c0db3e458cbd10db..773a814d409361767da369070d2d7e5267536c16 100644 (file)
--- a/Documentation/ia64/aliasing-test.c
+++ b/Documentation/ia64/aliasing-test.c
@@ -19,6 +19,7 @@
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <linux/pci.h>
 
 int sum;
 
@@ -34,13 +35,19 @@ int map_mem(char *path, off_t offset, size_t length, int touch)
                return -1;
        }
 
+       if (fnmatch("/proc/bus/pci/*", path, 0) == 0) {
+               rc = ioctl(fd, PCIIOC_MMAP_IS_MEM);
+               if (rc == -1)
+                       perror("PCIIOC_MMAP_IS_MEM ioctl");
+       }
+
        addr = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset);
        if (addr == MAP_FAILED)
                return 1;
 
        if (touch) {
                c = (int *) addr;
-               while (c < (int *) (offset + length))
+               while (c < (int *) (addr + length))
                        sum += *c++;
        }
 
@@ -54,7 +61,7 @@ int map_mem(char *path, off_t offset, size_t length, int touch)
        return 0;
 }
 
-int scan_sysfs(char *path, char *file, off_t offset, size_t length, int touch)
+int scan_tree(char *path, char *file, off_t offset, size_t length, int touch)
 {
        struct dirent **namelist;
        char *name, *path2;
@@ -93,7 +100,7 @@ int scan_sysfs(char *path, char *file, off_t offset, size_t length, int touch)
                } else {
                        r = lstat(path2, &buf);
                        if (r == 0 && S_ISDIR(buf.st_mode)) {
-                               rc = scan_sysfs(path2, file, offset, length, touch);
+                               rc = scan_tree(path2, file, offset, length, touch);
                                if (rc < 0)
                                        return rc;
                        }
@@ -238,10 +245,15 @@ int main()
        else
                fprintf(stderr, "FAIL: /dev/mem 0x0-0x100000 not accessible\n");
 
-       scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0, 0xA0000, 1);
-       scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0xA0000, 0x20000, 0);
-       scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0xC0000, 0x40000, 1);
-       scan_sysfs("/sys/class/pci_bus", "legacy_mem", 0, 1024*1024, 0);
+       scan_tree("/sys/class/pci_bus", "legacy_mem", 0, 0xA0000, 1);
+       scan_tree("/sys/class/pci_bus", "legacy_mem", 0xA0000, 0x20000, 0);
+       scan_tree("/sys/class/pci_bus", "legacy_mem", 0xC0000, 0x40000, 1);
+       scan_tree("/sys/class/pci_bus", "legacy_mem", 0, 1024*1024, 0);
 
        scan_rom("/sys/devices", "rom");
+
+       scan_tree("/proc/bus/pci", "??.?", 0, 0xA0000, 1);
+       scan_tree("/proc/bus/pci", "??.?", 0xA0000, 0x20000, 0);
+       scan_tree("/proc/bus/pci", "??.?", 0xC0000, 0x40000, 1);
+       scan_tree("/proc/bus/pci", "??.?", 0, 1024*1024, 0);
 }