basic process support and some syscalls

[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 5f832aa34038364f2f202e084b379d779a8c1116..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
-#define KPG_SIZE    24*1024
+#define KPG_SIZE    10*4096
 
 .section .multiboot
     .long MULTIBOOT_MAGIC
@@ -18,15 +18,15 @@
     /* 根据System V ABI，栈地址必须16字节对齐 */
     /* 这里只是一个临时栈，在_hhk_init里面我们会初始化内核专用栈 */
     stack_bottom:
-        .skip 16318, 0
+        .skip 16318 * 2, 0
     stack_top:
 
 
 /* 
     1 page directory, 
-    5 page tables:
+    9 page tables:
         1. Mapping reserved area and hhk_init
-        2-5. Remapping the kernels
+        2-9. Remapping the kernels
 */
 
 .section .kpg
@@ -41,6 +41,9 @@
                                  * linker more knowledge about the label 
                                  */
     start_: 
+        cld
+        # 确保屏蔽所有外中断，直到我们准备好PIC为止
+        cli
         movl $stack_top, %esp
 
         subl $16, %esp
@@ -74,9 +77,9 @@
         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
-        orl $0x80000000, %eax
+        orl $0x80010000, %eax
         movl %eax, %cr0
 
         addl $16, %esp