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Subject[PATCH 3/5] i386 create e820.c to handle find_max_pfn function
This patch moves find_max_pfn relative function from setup.c to e820.c,
staic declaration about this function is removed and add extern
declaration in header file.

Signed-off-by: bibo,mao <bibo.mao@intel.com>


arch/i386/kernel/e820.c | 52 +++++++++++++++++
arch/i386/kernel/setup.c | 55 -------------------
include/asm-i386/e820.h | 1
3 files changed, 53 insertions(+), 55 deletions(-)
----------------------------------------------------

diff -Nrup -X 2.6.19-rc2-mm2.org/Documentation/dontdiff 2.6.19-rc2-mm2.org/arch/i386/kernel/e820.c 2.6.19-rc2-mm2/arch/i386/kernel/e820.c
--- 2.6.19-rc2-mm2.org/arch/i386/kernel/e820.c 2006-10-26 13:10:22.000000000 +0800
+++ 2.6.19-rc2-mm2/arch/i386/kernel/e820.c 2006-10-26 16:08:49.000000000 +0800
@@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/efi.h>
+#include <linux/pfn.h>

#include <asm/pgtable.h>
#include <asm/page.h>
@@ -539,3 +540,54 @@ int __init copy_e820_map(struct e820entr
return 0;
}

+/*
+ * Callback for efi_memory_walk.
+ */
+static int __init
+efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
+{
+ unsigned long *max_pfn = arg, pfn;
+
+ if (start < end) {
+ pfn = PFN_UP(end -1);
+ if (pfn > *max_pfn)
+ *max_pfn = pfn;
+ }
+ return 0;
+}
+
+static int __init
+efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
+{
+ memory_present(0, start, end);
+ return 0;
+}
+
+/*
+ * Find the highest page frame number we have available
+ */
+void __init find_max_pfn(void)
+{
+ int i;
+
+ max_pfn = 0;
+ if (efi_enabled) {
+ efi_memmap_walk(efi_find_max_pfn, &max_pfn);
+ efi_memmap_walk(efi_memory_present_wrapper, NULL);
+ return;
+ }
+
+ for (i = 0; i < e820.nr_map; i++) {
+ unsigned long start, end;
+ /* RAM? */
+ if (e820.map[i].type != E820_RAM)
+ continue;
+ start = PFN_UP(e820.map[i].addr);
+ end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
+ if (start >= end)
+ continue;
+ if (end > max_pfn)
+ max_pfn = end;
+ memory_present(0, start, end);
+ }
+}
diff -Nrup -X 2.6.19-rc2-mm2.org/Documentation/dontdiff 2.6.19-rc2-mm2.org/arch/i386/kernel/setup.c 2.6.19-rc2-mm2/arch/i386/kernel/setup.c
--- 2.6.19-rc2-mm2.org/arch/i386/kernel/setup.c 2006-10-26 13:10:22.000000000 +0800
+++ 2.6.19-rc2-mm2/arch/i386/kernel/setup.c 2006-10-26 16:08:49.000000000 +0800
@@ -63,9 +63,6 @@
#include <setup_arch.h>
#include <bios_ebda.h>

-/* Forward Declaration. */
-void __init find_max_pfn(void);
-
/* This value is set up by the early boot code to point to the value
immediately after the boot time page tables. It contains a *physical*
address, and must not be in the .bss segment! */
@@ -392,29 +389,6 @@ static int __init parse_reservetop(char
}
early_param("reservetop", parse_reservetop);

-/*
- * Callback for efi_memory_walk.
- */
-static int __init
-efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
-{
- unsigned long *max_pfn = arg, pfn;
-
- if (start < end) {
- pfn = PFN_UP(end -1);
- if (pfn > *max_pfn)
- *max_pfn = pfn;
- }
- return 0;
-}
-
-static int __init
-efi_memory_present_wrapper(unsigned long start, unsigned long end, void *arg)
-{
- memory_present(0, start, end);
- return 0;
-}
-
/*
* This function checks if the entire range <start,end> is mapped with type.
*
@@ -448,35 +422,6 @@ e820_all_mapped(unsigned long s, unsigne
}

/*
- * Find the highest page frame number we have available
- */
-void __init find_max_pfn(void)
-{
- int i;
-
- max_pfn = 0;
- if (efi_enabled) {
- efi_memmap_walk(efi_find_max_pfn, &max_pfn);
- efi_memmap_walk(efi_memory_present_wrapper, NULL);
- return;
- }
-
- for (i = 0; i < e820.nr_map; i++) {
- unsigned long start, end;
- /* RAM? */
- if (e820.map[i].type != E820_RAM)
- continue;
- start = PFN_UP(e820.map[i].addr);
- end = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
- if (start >= end)
- continue;
- if (end > max_pfn)
- max_pfn = end;
- memory_present(0, start, end);
- }
-}
-
-/*
* Determine low and high memory ranges:
*/
unsigned long __init find_max_low_pfn(void)
diff -Nrup -X 2.6.19-rc2-mm2.org/Documentation/dontdiff 2.6.19-rc2-mm2.org/include/asm-i386/e820.h 2.6.19-rc2-mm2/include/asm-i386/e820.h
--- 2.6.19-rc2-mm2.org/include/asm-i386/e820.h 2006-10-25 14:59:33.000000000 +0800
+++ 2.6.19-rc2-mm2/include/asm-i386/e820.h 2006-10-26 16:09:29.000000000 +0800
@@ -38,6 +38,7 @@ extern struct e820map e820;

extern int e820_all_mapped(unsigned long start, unsigned long end,
unsigned type);
+extern void find_max_pfn(void);

#endif/*!__ASSEMBLY__*/

-
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