basic process support and some syscalls

[lunaix-os.git] / lunaix-os / arch / x86 / hhk.c

diff --git a/lunaix-os/arch/x86/hhk.c b/lunaix-os/arch/x86/hhk.c
index c0e5f9a1b2ac2b2b4f8fc7b93c4f42e3cda6029a..5dae566790068ccf027982c9eede995a59ed7e0e 100644 (file)
--- a/lunaix-os/arch/x86/hhk.c
+++ b/lunaix-os/arch/x86/hhk.c
@@ -1,7 +1,7 @@
 #include <arch/x86/boot/multiboot.h>
 #include <arch/x86/idt.h>
 #include <lunaix/mm/page.h>
-#include <lunaix/constants.h>
+#include <lunaix/common.h>
 
 #define PT_ADDR(ptd, pt_index)                       ((ptd_t*)ptd + (pt_index + 1) * 1024)
 #define SET_PDE(ptd, pde_index, pde)                 *((ptd_t*)ptd + pde_index) = pde;
@@ -14,12 +14,12 @@
 // use table #1
 #define PG_TABLE_IDENTITY           0
 
-// use table #2-4
+// use table #2-8
 // hence the max size of kernel is 8MiB
 #define PG_TABLE_KERNEL             1
 
-// use table #5
-#define PG_TABLE_STACK              4
+// use table #9
+#define PG_TABLE_STACK              8
 
 // Provided by linker (see linker.ld)
 extern uint8_t __kernel_start;
@@ -29,26 +29,26 @@ extern uint8_t _k_stack;
 
 void 
 _init_page(ptd_t* ptd) {
-    SET_PDE(ptd, 0, PDE(PG_PRESENT, ptd + PG_MAX_ENTRIES))
+    SET_PDE(ptd, 0, NEW_L1_ENTRY(PG_PREM_RW, ptd + PG_MAX_ENTRIES))
     
     // 对低1MiB空间进行对等映射（Identity mapping），也包括了我们的VGA，方便内核操作。
     for (uint32_t i = 0; i < 256; i++)
     {
-        SET_PTE(ptd, PG_TABLE_IDENTITY, i, PTE(PG_PREM_RW, (i << 12)))
+        SET_PTE(ptd, PG_TABLE_IDENTITY, i, NEW_L2_ENTRY(PG_PREM_RW, (i << PG_SIZE_BITS)))
     }
 
     // 对等映射我们的hhk_init，这样一来，当分页与地址转换开启后，我们依然能够照常执行最终的 jmp 指令来跳转至
     //  内核的入口点
     for (uint32_t i = 0; i < HHK_PAGE_COUNT; i++)
     {
-        SET_PTE(ptd, PG_TABLE_IDENTITY, 256 + i, PTE(PG_PREM_RW, 0x100000 + (i << 12)))
+        SET_PTE(ptd, PG_TABLE_IDENTITY, 256 + i, NEW_L2_ENTRY(PG_PREM_RW, 0x100000 + (i << PG_SIZE_BITS)))
     }
     
     // --- 将内核重映射至高半区 ---
     
     // 这里是一些计算，主要是计算应当映射进的 页目录 与 页表 的条目索引（Entry Index）
-    uint32_t kernel_pde_index = PD_INDEX(sym_val(__kernel_start));
-    uint32_t kernel_pte_index = PT_INDEX(sym_val(__kernel_start));
+    uint32_t kernel_pde_index = L1_INDEX(sym_val(__kernel_start));
+    uint32_t kernel_pte_index = L2_INDEX(sym_val(__kernel_start));
     uint32_t kernel_pg_counts = KERNEL_PAGE_COUNT;
     
     // 将内核所需要的页表注册进页目录
@@ -59,15 +59,15 @@ _init_page(ptd_t* ptd) {
         SET_PDE(
             ptd, 
             kernel_pde_index + i,   
-            PDE(PG_PREM_RW, PT_ADDR(ptd, PG_TABLE_KERNEL + i))
+            NEW_L1_ENTRY(PG_PREM_RW, PT_ADDR(ptd, PG_TABLE_KERNEL + i))
         )
     }
     
     // 首先，检查内核的大小是否可以fit进我们这几个表（12MiB）
-    if (kernel_pg_counts > (PG_TABLE_STACK - PG_TABLE_KERNEL) * 1024) {
+    if (kernel_pg_counts > (PG_TABLE_STACK - PG_TABLE_KERNEL) * PG_MAX_ENTRIES) {
         // ERROR: require more pages
         //  here should do something else other than head into blocking
-        while (1);
+        asm ("ud2");
     }
     
     // 计算内核.text段的物理地址
@@ -80,15 +80,15 @@ _init_page(ptd_t* ptd) {
             ptd, 
             PG_TABLE_KERNEL, 
             kernel_pte_index + i, 
-            PTE(PG_PREM_RW, kernel_pm + (i << 12))
+            NEW_L2_ENTRY(PG_PREM_RW, kernel_pm + (i << PG_SIZE_BITS))
         )
     }
 
     // 最后一个entry用于循环映射
     SET_PDE(
         ptd,
-        1023,
-        PDE(T_SELF_REF_PERM, ptd)
+        PG_MAX_ENTRIES - 1,
+        NEW_L1_ENTRY(T_SELF_REF_PERM, ptd)
     );
 }