Bootable kernel skeleton

bootloader/x86/descriptor_flags.inc

@@ -0,0 +1,46 @@
+attrib:
+    .present              equ 1 << 7
+    .ring1                equ 1 << 5
+    .ring2                equ 1 << 6
+    .ring3                equ 1 << 5 | 1 << 6
+    .user                 equ 1 << 4
+;user
+    .code                 equ 1 << 3
+;   code
+    .conforming           equ 1 << 2
+    .readable             equ 1 << 1
+;   data
+    .expand_down          equ 1 << 2
+    .writable             equ 1 << 1
+    .accessed             equ 1 << 0
+;system
+;   legacy
+    .tssAvailabe16        equ 0x1
+    .ldt                  equ 0x2
+    .tssBusy16            equ 0x3
+    .call16               equ 0x4
+    .task                 equ 0x5
+    .interrupt16          equ 0x6
+    .trap16               equ 0x7
+    .tssAvailabe32        equ 0x9
+    .tssBusy32            equ 0xB
+    .call32               equ 0xC
+    .interrupt32          equ 0xE
+    .trap32               equ 0xF
+;   long mode
+    .ldt32                equ 0x2
+    .tssAvailabe64        equ 0x9
+    .tssBusy64            equ 0xB
+    .call64               equ 0xC
+    .interrupt64          equ 0xE
+    .trap64               equ 0xF
+
+flags:
+    .granularity equ 1 << 7
+    .available equ 1 << 4
+;user
+    .default_operand_size equ 1 << 6
+;   code
+    .long_mode equ 1 << 5
+;   data
+    .reserved equ 1 << 5