score: add MEMORY_START and MEMORY_SIZE define, to make the code clear

2 files changed, 19 insertions, 16 deletions

diff --git a/arch/score/include/asm/setup.h b/arch/score/include/asm/setup.h
index de89eff98dae..3cb944dc68dc 100644
--- a/arch/score/include/asm/setup.h
+++ b/arch/score/include/asm/setup.h
@@ -2,7 +2,8 @@
 #define _ASM_SCORE_SETUP_H
 
 #define COMMAND_LINE_SIZE       256
-#define MEM_SIZE                0x2000000
+#define MEMORY_START            0
+#define MEMORY_SIZE             0x2000000
 
 #ifdef __KERNEL__
 
diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
index a172ce170f62..6a2503c75c4e 100644
--- a/arch/score/kernel/setup.c
+++ b/arch/score/kernel/setup.c
@@ -26,10 +26,12 @@
 #include <linux/bootmem.h>
 #include <linux/initrd.h>
 #include <linux/ioport.h>
+#include <linux/mm.h>
 #include <linux/seq_file.h>
 #include <linux/screen_info.h>
 
 #include <asm-generic/sections.h>
+#include <asm/setup.h>
 
 struct screen_info screen_info;
 unsigned long kernelsp;
@@ -40,25 +42,25 @@ static struct resource data_resource = { .name = "Kernel data",};
 
 static void __init bootmem_init(void)
 {
-        unsigned long reserved_end, bootmap_size;
+        unsigned long start_pfn, bootmap_size;
         unsigned long size = initrd_end - initrd_start;
 
-        reserved_end = (unsigned long)_end;
+        start_pfn = PFN_UP(__pa(&_end));
 
-        min_low_pfn = 0;
-        max_low_pfn = MEM_SIZE / PAGE_SIZE;
+        min_low_pfn = PFN_UP(MEMORY_START);
+        max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
 
         /* Initialize the boot-time allocator with low memory only. */
-        bootmap_size = init_bootmem_node(NODE_DATA(0), reserved_end,
+        bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
                                          min_low_pfn, max_low_pfn);
         add_active_range(0, min_low_pfn, max_low_pfn);
 
-        free_bootmem(PFN_PHYS(reserved_end),
-                     (max_low_pfn - reserved_end) << PAGE_SHIFT);
-        memory_present(0, reserved_end, max_low_pfn);
+        free_bootmem(PFN_PHYS(start_pfn),
+                     (max_low_pfn - start_pfn) << PAGE_SHIFT);
+        memory_present(0, start_pfn, max_low_pfn);
 
         /* Reserve space for the bootmem bitmap. */
-        reserve_bootmem(PFN_PHYS(reserved_end), bootmap_size, BOOTMEM_DEFAULT);
+        reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);
 
         if (size == 0) {
                 printk(KERN_INFO "Initrd not found or empty");
@@ -87,15 +89,15 @@ static void __init resource_init(void)
 {
         struct resource *res;
 
-        code_resource.start = (unsigned long)_text;
-        code_resource.end = (unsigned long)_etext - 1;
-        data_resource.start = (unsigned long)_etext;
-        data_resource.end = (unsigned long)_edata - 1;
+        code_resource.start = __pa(&_text);
+        code_resource.end = __pa(&_etext) - 1;
+        data_resource.start = __pa(&_etext);
+        data_resource.end = __pa(&_edata) - 1;
 
         res = alloc_bootmem(sizeof(struct resource));
         res->name = "System RAM";
-        res->start = 0;
-        res->end = MEM_SIZE - 1;
+        res->start = MEMORY_START;
+        res->end = MEMORY_START + MEMORY_SIZE - 1;
         res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
         request_resource(&iomem_resource, res);