Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / arch / x86_64 / kernel / e820.c

diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index 1ef6028..708a3cd 100644 (file)
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -1,7 +1,6 @@
 /* 
  * Handle the memory map.
  * The functions here do the job until bootmem takes over.
- * $Id: e820.c,v 1.4 2002/09/19 19:25:32 ak Exp $
  *
  *  Getting sanitize_e820_map() in sync with i386 version by applying change:
  *  -  Provisions for empty E820 memory regions (reported by certain BIOSes).
@@ -9,7 +8,6 @@
  *  Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
  *
  */
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/init.h>
@@ -18,7 +16,9 @@
 #include <linux/string.h>
 #include <linux/kexec.h>
 #include <linux/module.h>
+#include <linux/mm.h>
 
+#include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/e820.h>
 #include <asm/proto.h>
@@ -72,7 +72,11 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size)
 #endif
        /* kernel code + 640k memory hole (later should not be needed, but 
           be paranoid for now) */
-       if (last >= 640*1024 && addr < __pa_symbol(&_end)) { 
+       if (last >= 640*1024 && addr < 1024*1024) {
+               *addrp = 1024*1024;
+               return 1;
+       }
+       if (last >= __pa_symbol(&_text) && last < __pa_symbol(&_end)) {
                *addrp = __pa_symbol(&_end);
                return 1;
        }
@@ -294,6 +298,53 @@ void __init e820_reserve_resources(void)
        }
 }
 
+/* Mark pages corresponding to given address range as nosave */
+static void __init
+e820_mark_nosave_range(unsigned long start, unsigned long end)
+{
+       unsigned long pfn, max_pfn;
+
+       if (start >= end)
+               return;
+
+       printk("Nosave address range: %016lx - %016lx\n", start, end);
+       max_pfn = end >> PAGE_SHIFT;
+       for (pfn = start >> PAGE_SHIFT; pfn < max_pfn; pfn++)
+               if (pfn_valid(pfn))
+                       SetPageNosave(pfn_to_page(pfn));
+}
+
+/*
+ * Find the ranges of physical addresses that do not correspond to
+ * e820 RAM areas and mark the corresponding pages as nosave for software
+ * suspend and suspend to RAM.
+ *
+ * This function requires the e820 map to be sorted and without any
+ * overlapping entries and assumes the first e820 area to be RAM.
+ */
+void __init e820_mark_nosave_regions(void)
+{
+       int i;
+       unsigned long paddr;
+
+       paddr = round_down(e820.map[0].addr + e820.map[0].size, PAGE_SIZE);
+       for (i = 1; i < e820.nr_map; i++) {
+               struct e820entry *ei = &e820.map[i];
+
+               if (paddr < ei->addr)
+                       e820_mark_nosave_range(paddr,
+                                       round_up(ei->addr, PAGE_SIZE));
+
+               paddr = round_down(ei->addr + ei->size, PAGE_SIZE);
+               if (ei->type != E820_RAM)
+                       e820_mark_nosave_range(round_up(ei->addr, PAGE_SIZE),
+                                       paddr);
+
+               if (paddr >= (end_pfn << PAGE_SHIFT))
+                       break;
+       }
+}
+
 /* 
  * Add a memory region to the kernel e820 map.
  */ 
@@ -621,6 +672,7 @@ void __init parse_memmapopt(char *p, char **from)
 }
 
 unsigned long pci_mem_start = 0xaeedbabe;
+EXPORT_SYMBOL(pci_mem_start);
 
 /*
  * Search for the biggest gap in the low 32 bits of the e820