fix: remove the reference to unknown variable

[lunaix-os.git] / lunaix-os / arch / x86 / boot.S

diff --git a/lunaix-os/arch/x86/boot.S b/lunaix-os/arch/x86/boot.S
index 8ba78cc39ab8443004b394545a786061c7995369..9c86bbc6bed8081695dcb00a58b33b100403b73e 100644 (file)
--- a/lunaix-os/arch/x86/boot.S
+++ b/lunaix-os/arch/x86/boot.S
@@ -2,7 +2,7 @@
 #include <arch/x86/boot/multiboot.h>
 
 #define MB_FLAGS    MULTIBOOT_MEMORY_INFO | MULTIBOOT_PAGE_ALIGN
 #include <arch/x86/boot/multiboot.h>
 
 #define MB_FLAGS    MULTIBOOT_MEMORY_INFO | MULTIBOOT_PAGE_ALIGN

-#define KPG_SIZE    24*1024
+#define KPG_SIZE    10*4096

 
 .section .multiboot
     .long MULTIBOOT_MAGIC
 
 .section .multiboot
     .long MULTIBOOT_MAGIC


@@ -24,9 +24,9 @@
 
 /* 
     1 page directory, 
 
 /* 
     1 page directory, 

-    5 page tables:
+    9 page tables:

         1. Mapping reserved area and hhk_init
         1. Mapping reserved area and hhk_init

-        2-5. Remapping the kernels
+        2-9. Remapping the kernels

 */
 
 .section .kpg
 */
 
 .section .kpg


@@ -77,9 +77,9 @@
         andl $0xfffff000, %eax      # 有点多余，但写上还算明白一点
         movl %eax, %cr3
 
         andl $0xfffff000, %eax      # 有点多余，但写上还算明白一点
         movl %eax, %cr3
 

-        /* 开启分页与地址转换 (CR0.PG=1) */
+        /* 开启分页与地址转换 (CR0.PG=1, PG.WP=1) */

         movl %cr0, %eax
         movl %cr0, %eax

-        orl $0x80000000, %eax
+        orl $0x80010000, %eax

         movl %eax, %cr0
 
         addl $16, %esp
         movl %eax, %cr0
 
         addl $16, %esp