; -*- fundamental -*-
; GeekOS setup code
; Copyright (c) 2001,2004 David H. Hovemeyer <daveho@cs.umd.edu>
-; $Revision: 1.3 $
+; Copyright (c) 2008 Jack Lange <jarusl@cs.northwestern.edu>
+; $Revision: 1.8 $
; This is free software. You are permitted to use,
; redistribute, and modify it as specified in the file "COPYING".
; modified by Bruce Evans (bde)
; adapted for Kernel Toolkit by Luigi Sgro
+%define __BIG_KERNEL__
+
%include "defs.asm"
[BITS 16]
[ORG 0x0]
+start:
+ db 0xEB
+ db 46 ;trampoline
+
+; This is the setup header, and it must start at %cs:2 (old 0x9020:2)
+
+ db 'H' ; header signature
+ db 'd'
+ db 'r'
+ db 'S'
+ dw 0x0203 ; header version number (>= 0x0105)
+ ; or else old loadlin-1.5 will fail)
+realmode_swtch: dw 0, 0 ; default_switch, SETUPSEG
+start_sys_seg: dw SYSSEG
+ dw kernel_version ; pointing to kernel version string
+ ; above section of header is compatible
+ ; with loadlin-1.5 (header v1.5). Don't
+ ; change it.
+
+type_of_loader: db 0 ; = 0, old one (LILO, Loadlin,
+ ; Bootlin, SYSLX, bootsect...)
+ ; See Documentation/i386/boot.txt for
+ ; assigned ids
+
+; flags, unused bits must be zero (RFU) bit within loadflags
+loadflags: db 1
+;LOADED_HIGH equ 1 ; If set, the kernel is loaded high
+;CAN_USE_HEAP equ 0x80 ; If set, the loader also has set
+ ; heap_end_ptr to tell how much
+ ; space behind setup.S can be used for
+ ; heap purposes.
+ ; Only the loader knows what is free
+;%ifndef __BIG_KERNEL__
+; db 1
+;%else
+; db 1
+;%endif
+
+setup_move_size: dw 0x8000 ; size to move, when setup is not
+ ; loaded at 0x90000. We will move setup
+ ; to 0x90000 then just before jumping
+ ; into the kernel. However, only the
+ ; loader knows how much data behind
+ ; us also needs to be loaded.
+
+code32_start: dd 0x100000 ; here loaders can put a different
+ ; start address for 32-bit code.
+;%ifndef __BIG_KERNEL__
+; dd 0x100000 ; 0x1000 = default for zImage
+;%else
+; dd 0x100000 ; 0x100000 = default for big kernel
+;%endif
+
+ramdisk_image: dd 0 ; address of loaded ramdisk image
+ ; Here the loader puts the 32-bit
+ ; address where it loaded the image.
+ ; This only will be read by the kernel.
+
+ramdisk_size: dd 0 ; its size in bytes
+
+bootsect_kludge:
+ dd 0 ; obsolete
+
+heap_end_ptr: dw modelist+1024 ; (Header version 0x0201 or later)
+ ; space from here (exclusive) down to
+ ; end of setup code can be used by setup
+ ; for local heap purposes.
+
+pad1: dw 0
+cmd_line_ptr: dd 0 ; (Header version 0x0202 or later)
+ ; If nonzero, a 32-bit pointer
+ ; to the kernel command line.
+ ; The command line should be
+ ; located between the start of
+ ; setup and the end of low
+ ; memory (0xa0000), or it may
+ ; get overwritten before it
+ ; gets read. If this field is
+ ; used, there is no longer
+ ; anything magical about the
+ ; 0x90000 segment; the setup
+ ; can be located anywhere in
+ ; low memory 0x10000 or higher.
+
+ramdisk_max: dd 0xffffffff
+;kernel_alignment: dd 0x200000 ; physical addr alignment required for
+ ; protected mode relocatable kernel
+;%ifdef CONFIG_RELOCATABLE
+;relocatable_kernel: db 1
+;%else
+;relocatable_kernel: db 0
+;%endif
+;pad2: db 0
+;pad3: dw 0
+
+;cmdline_size: dd COMMAND_LINE_SIZE-1 ;length of the command line,
+ ;added with boot protocol
+ ;version 2.06
+
+trampoline: call start_setup
+; ALIGN 16
+space:
+ %rep 1024
+ db 0
+ %endrep ; The offset at this point is 0x240
+
+; End of setup header ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+
start_setup:
; Redefine the data segment so we can access variables
mov ax, 0x01
lmsw ax
+
; Jump to 32 bit code.
jmp dword KERNEL_CS:(SETUPSEG << 4) + setup_32
; Build Boot_Info struct on stack.
; Note that we push the fields on in reverse order,
; since the stack grows downwards.
+
+ ;Zheng 08/02/2008
+ xor eax, eax
+ mov eax, [(SETUPSEG<<4)+ramdisk_size]
+ push eax
+
+ xor eax, eax
+ mov eax, [(SETUPSEG<<4)+ramdisk_image]
+ push eax
+
xor eax, eax
mov ax, [(SETUPSEG<<4)+mem_size_kbytes]
xor ebx, ebx
add eax, ebx
push eax ; memSizeKB
- mov eax, GUEST_SIZE
- shl eax, 9 ; Multiply the guest size by 512 to get byte size
- push eax ; Size of the guest kernel
-
- mov eax, 0x100000
- push eax ; Load address of the guest
-
mov eax, VMM_SIZE
shl eax, 9 ; Multiply the vmm size by 512 to get byte size
- push eax ; size of the VMM
+ push ebx ; size of the VMM
push dword 8 ; bootInfoSize
mem_size_kbytes: dw 0
mem_size_eblocks: dw 0
+
; ----------------------------------------------------------------------
; The GDT. Creates flat 32-bit address space for the kernel
; code, data, and stack. Note that this GDT is just used
IDT_Pointer:
dw 0
dd 00
+
+; Here's a bunch of information about your current kernel..
+kernel_version: db "1.0.0VMMHack"
+ db " ("
+ db "copyright"
+ db "@"
+ db "2008"
+ db ") "
+ db ""
+ db 0
+
+modelist:
