Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart

[linux-drm-fsl-dcu.git] / arch / x86_64 / kernel / e820.c

diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index 6fe191c5808465ddc7c8673c8996d52a67858d98..4651fd22b213bf047e7e9ffd9bf904ddeb4d1cd4 100644 (file)
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -83,6 +83,13 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size)
                return 1;
        }
 
+#ifdef CONFIG_NUMA
+       /* NUMA memory to node map */
+       if (last >= nodemap_addr && addr < nodemap_addr + nodemap_size) {
+               *addrp = nodemap_addr + nodemap_size;
+               return 1;
+       }
+#endif
        /* XXX ramdisk image here? */ 
        return 0;
 } 
@@ -183,6 +190,37 @@ unsigned long __init e820_end_of_ram(void)
        return end_pfn; 
 }
 
+/*
+ * Find the hole size in the range.
+ */
+unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
+{
+       unsigned long ram = 0;
+       int i;
+
+       for (i = 0; i < e820.nr_map; i++) {
+               struct e820entry *ei = &e820.map[i];
+               unsigned long last, addr;
+
+               if (ei->type != E820_RAM ||
+                   ei->addr+ei->size <= start ||
+                   ei->addr >= end)
+                       continue;
+
+               addr = round_up(ei->addr, PAGE_SIZE);
+               if (addr < start)
+                       addr = start;
+
+               last = round_down(ei->addr + ei->size, PAGE_SIZE);
+               if (last >= end)
+                       last = end;
+
+               if (last > addr)
+                       ram += last - addr;
+       }
+       return ((end - start) - ram);
+}
+
 /*
  * Mark e820 reserved areas as busy for the resource manager.
  */