paging is not very funHEADmain

3 files changed, 39 insertions, 6 deletions

diff --git a/kernel/include/arch/i686/acpi.h b/kernel/include/arch/i686/acpi.h
index bb35010..47bcc88 100644
--- a/kernel/include/arch/i686/acpi.h
+++ b/kernel/include/arch/i686/acpi.h
@@ -102,5 +102,5 @@ struct FixedACPIDescriptionTable {
     struct GenericAddressStructure x_gpe1_block;
 };
 
-void acpi_init(void *rsdp);
-void acpi_poweroff(void);
+extern void acpi_init(void);
+extern void acpi_poweroff(void);
diff --git a/kernel/include/arch/i686/mboot.h b/kernel/include/arch/i686/mboot.h
index 394071f..2ebc983 100644
--- a/kernel/include/arch/i686/mboot.h
+++ b/kernel/include/arch/i686/mboot.h
@@ -12,7 +12,7 @@ struct BootTag {
     uint32_t type;
     uint32_t size;
     union {
-        char cmdline[CMDLINE_MAX];
+        char cmdline[CMDLINE_MAX + 1];
         struct MemoryMap *memory_map;
         struct RootSystemDescriptionPointer *rsdp;
     } data;
@@ -26,9 +26,9 @@ struct BootInfo {
 
 enum BootTagID {
     ID_CMDLINE = 0,
-    iD_MEMORYMAP = 6,
+    ID_MEMORYMAP = 6,
     ID_RSDP = 14
 };
 
-void load_boot_info(void* boot_info);
-bool get_boot_tag(enum BootTagID id, struct BootTag **tag);
+extern void load_boot_info(void* boot_info);
+extern bool get_boot_tag(enum BootTagID id, struct BootTag **tag);
diff --git a/kernel/include/arch/i686/paging.h b/kernel/include/arch/i686/paging.h
new file mode 100644
index 0000000..3c0c335
--- /dev/null
+++ b/kernel/include/arch/i686/paging.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <stddef.h>
+
+struct page_directory_t { // 32 bits
+    unsigned int present       : 1;
+    unsigned int rw_flag       : 1;
+    unsigned int access_lvl    : 1; //0 is for only ring0. 1 is for anybody.
+    unsigned int write_through : 1;
+    unsigned int cache_off     : 1;
+    unsigned int accessed      : 1;
+    unsigned int zero          : 1;
+    unsigned int page_size     : 1;
+    unsigned int unused        : 4;
+    unsigned int tbl_addr      : 20;
+};
+
+struct page_table_t {  // 32 bits
+    unsigned int present       : 1;
+    unsigned int rw_flag       : 1;
+    unsigned int access_lvl    : 1; //0 is for only ring0. 1 is for anybody.
+    unsigned int write_through : 1;
+    unsigned int cache_off     : 1;
+    unsigned int accessed      : 1;
+    unsigned int dirty         : 1;
+    unsigned int zero          : 1;
+    unsigned int global        : 1;
+    unsigned int reserved      : 3;
+    unsigned int phys_addr     : 20;
+};
+
+extern void ident_map_addr(void *addr, size_t len);
+extern void ident_unmap_addr(void *addr, size_t len);