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https://gitlab.os-k.eu/os-k-team/os-k.git
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Stuff
This commit is contained in:
parent
c7118e1d81
commit
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13
Makefile
13
Makefile
@ -59,7 +59,7 @@ NC='\033[1;37m'
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boot.mbr: $(BINDIR)/disk.img $(MBRDIR)/grub.cfg
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@mkdir -p $(BINDIR)/disk
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@echo ${CL2}[boot.mbr]${NC} Installing bootloader on image...${CL3}
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@echo ${CL2}[boot.mbr]${NC} Installing MBR on image...${CL3}
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@$(MBRDIR)/grub-install.sh $(BINDIR)/disk.img $(BINDIR)/disk $(MBRDIR)/grub.cfg
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@echo ${CL2}[boot.mbr]${CL} OK${CL3}
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@rmdir $(BINDIR)/disk
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@ -69,13 +69,13 @@ boot.loader.asm: $(LOADERDIR)/loader.asm
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@$(ASM) $(BOOTFLAGS) $(LOADERDIR)/loader.asm -o $(OBJDIR)/boot/loader.bin > /dev/null
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@echo ${CL2}[boot.loader.asm]${CL} OK${CL3}
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bootloader: boot.mbr boot.loader.asm
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loader: boot.loader.asm
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@mkdir -p $(BINDIR)/disk
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@echo ${CL2}[bootloader]${NC} Constructing bootloader...${CL3}
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@echo ${CL2}[loader]${NC} Constructing kernel loader...${CL3}
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@$(MBRDIR)/mount.sh $(BINDIR)/disk.img $(BINDIR)/disk
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@cp $(OBJDIR)/boot/loader.bin $(BINDIR)/disk/boot/loader.bin
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@$(MBRDIR)/umount.sh $(BINDIR)/disk
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@echo ${CL2}[bootloader]${CL} OK${CL3}
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@echo ${CL2}[loader]${CL} OK${CL3}
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@rmdir $(BINDIR)/disk
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make_disk:
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@ -83,8 +83,11 @@ make_disk:
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@$(MBRDIR)/create_disk.sh $(BINDIR)/disk.img
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@echo ${CL2}[make_disk]${CL} OK${CL3}
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boot: make_disk bootloader
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boot: make_disk boot.mbr loader
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@echo ${CL2}[[boot]]${CL} Terminated without error.${CL3}
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all: boot kernel
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@echo ${CL2}[[all]]${CL} Terminated without error.${CL3}
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# TEST
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@ -35,17 +35,16 @@ _start:
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mov ax, cs ; correcting cs after the horrible far jump
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mov ds, ax ; hm... And ds too
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mov es, ax ; And es because it is jealous
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mov [Bootdrv], dl
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;mov [Bootdrv], dl
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xor dl, dl
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jmp 0x0000:main ; pas sûr
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multiboot_header:
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MB_header:
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align 4
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dd MB_HEADER_MAGIC
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dd MB_HEADER_FLAGS
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dd CHECKSUM
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dd multiboot_header ; Header address
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dd MB_header ; Header address
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dd _start ; Address of code entry point
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dd 00 ; (end of code) not necessary
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dd 00 ; (bss) not necessary
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@ -61,189 +60,13 @@ MB_start:
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add esp, 8 ; Cleanup 8 bytes pushed as arguments
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jmp Die
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%include "boot/loader/cpu/cpuid.asm"
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%include "boot/loader/io/rmterm.asm"
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%include "boot/loader/io/rmmem.asm"
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main:
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;;GO GDT64
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cli ; disable interrupts
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lgdt [GDT64]
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;; ACTIVATE PROTECTED MODE
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mov eax, cr0
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or al, 1b ; PE = 1
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mov cr0, eax
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;; DISABLE PAGING
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mov eax, cr0
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and eax, 0x7FFFFFFF ; PG = 0
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; |0|111111111111111111111111111111
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; |
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; `------ Paging bit
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mov cr0, eax
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push dword [VIDEO_MODE]
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push dword [VGA_HEIGHT]
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jmp (CODE_SELECTOR-GDT64):main32
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;; BEGIN OF THE HOLE -------------------------------------------------------- ;;
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Die:
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cli
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hlt ; die nooooow
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jmp 0xF000:0xFFF0
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;jmp 0xF000:0xFFF0
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jmp $
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;; END OF THE HOLE ---------------------------------------------------------- ;;
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[BITS 32]
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main32:
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pop dword [VGA_HEIGHT32]
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pop dword [VIDEO_MODE32]
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;; VERIFY A20
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pushad
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mov edi,0x112345 ;odd megabyte address.
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mov esi,0x012345 ;even megabyte address.
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mov [esi],esi ;making sure that both addresses contain diffrent values.
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mov [edi],edi ;(if A20 line is cleared the two pointers would point to the address 0x012345 that would contain 0x112345 (edi))
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cmpsd ;compare addresses to see if the're equivalent.
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popad
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jne .A20_on ;if not equivalent , A20 line is set.
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mov WORD [A20_OK], 0
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jmp .A20_end
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.A20_on:
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mov BYTE [A20_OK], 1
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.A20_end:
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;; INITIALIZE PROTECTED MODE SEGMENT REGISTERS
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mov ax, DATA_SELECTOR-GDT64
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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mov ss, ax
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;; ACTIVATE PHYSICAL ADRESS EXTENSION
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mov eax, cr4
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or eax, 100000b ; PAE = 1 = 4 Mo / page. 0 = 4 Ko
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mov cr4, eax
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;;cleanup
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mov edi, 0x70000
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mov ecx, 0x10000
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xor eax, eax
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rep stosd
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;;formatting
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mov dword [0x70000], 0x71000 + 7 ; first PDP table
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mov dword [0x71000], 0x72000 + 7 ; first page directory
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mov dword [0x72000], 0x73000 + 7 ; first page table
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mov edi, 0x73000 ; address of first page table
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mov eax, 7
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mov ecx, 256 ; number of pages to map (1 MB)
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.make_page_entries:
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stosd
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add edi, 4
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add eax, 0x1000
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loop .make_page_entries
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;; pointing pml4
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mov eax, 0x70000 ; Bass address of PML4
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mov cr3, eax ; load page-map level-4 base
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;; ACTIVATE LONG MODE
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mov ecx, 0xC0000080 ; address of MSR
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rdmsr ; read MSR
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or eax, 100000000b ; LME = 1. (Long Mode Enable)
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wrmsr ; write MSR
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;; ACTIVATE PAGING
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mov eax, cr0
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or eax, 0x80000000 ; make bit 31 (PG = Paging) to 1 :
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; |1|000000000000000000000000000000
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; |
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; `------ Paging bit
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mov cr0, eax
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push dword 0
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push dword [VIDEO_MODE]
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push dword 0
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push dword [VGA_HEIGHT]
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jmp (LONG_SELECTOR-GDT64):main64
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[BITS 64]
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;; DATA
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Init db "Booting OS/K !", 0x0D, 0x0A, 0x0D, 0x0A, 0x09, " Checking CPUID...",0
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CPUIDD db 0x09, " Checking CPUID...", 0
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EnA20 db 0x09, " Enabling A20 line...", 0
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%ifdef DEBUG
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ReadAttempt db 0x09, " Attempt to read a sector with ATA commands...", 0x0A, 0x0D, 0x0A, 0x0D, 0
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%else
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ReadAttempt db 0x09, " Attempt to read a sector with ATA commands...", 0
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%endif
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txt db 0x09, " Switching to Long Mode... ", 0
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EndOfLoader db "End of loader.bin. System will halt !", 0x0A, 0x0D, 0
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Reinit db "Booting OS/K !", 0x0D, 0x0A, 0x0D, 0x0A, 0
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Pass db " OK", 0x0A, 0x0D, 0
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Fail db " FAIL!", 0x0A, 0x0D, 0
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msg db "The system is now in x64 mode. Is this not beautiful ?", 0x0A, 0x0D, 0
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FileNotFound db "Second Stage Error : The Kernel was not found.", 0x0A, 0x0D, 0
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DiskError db "Second Stage Error : The Disk has crashed.", 0x0A, 0x0D, 0
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filename db "KERNEL BIN"
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%include "boot/loader/io/lmmem.asm"
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%include "boot/loader/io/lmterm.asm"
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%include "boot/loader/io/ata.asm"
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%include "boot/loader/cpu/cpu.asm"
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%include "boot/loader/fs/fat.asm"
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main64:
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pop qword [VGA_HEIGHT64]
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pop qword [VIDEO_MODE64]
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;; INITIALIZE STACK
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mov rsp, 0x9F000
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call clear
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;; Printing
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mov bl, 0x0B
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mov esi, Reinit
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call write
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mov bl, 0x0F
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mov esi, CPUIDD
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call write
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mov bl, 0x0A
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mov esi, Pass
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call write
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mov bl, 0x0F
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mov esi, EnA20
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call write
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call check_a20
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mov bl, 0x0F
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mov esi, txt
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call write
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mov bl, 0x0A
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mov esi, Pass
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call write
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mov bl, 0x0D
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mov esi, msg
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call write
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mov bl, 0x0F
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mov esi, ReadAttempt
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call write
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call temporize ; Temporized because the ATA drive must be ready
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mov bl, 1
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mov bh, 1
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call ata_read
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mov bl, 0x0D
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mov esi, EndOfLoader
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call write
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main:
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jmp Die
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@ -24,10 +24,10 @@
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;=----------------------------------------------------------------------------=;
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;; MULTIBOOT HEADER
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%define MB_AOUT_KLUDGE 1 << 16 ; We are not an ELF executable
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%define MB_ALIGN 1 << 0 ; Ask to align loaded modules on page boundaries
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%define MB_MEMINFO 1 << 1 ; Ask to provide memory map
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%define MB_HEADER_MAGIC 0x1BADB002
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%define MB_HEADER_FLAGS MB_AOUT_KLUDGE|MB_ALIGN|MB_MEMINFO
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%define CHECKSUM -(MB_HEADER_MAGIC + MB_HEADER_FLAGS)
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%define KERNEL_STACK 0x00200000 ; Stack starts at the 2mb address & grows down
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MB_AOUT_KLUDGE equ 1 << 16 ; We are not an ELF executable
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MB_ALIGN equ 1 << 0 ; Ask to align loaded modules on page boundaries
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MB_MEMINFO equ 1 << 1 ; Ask to provide memory map
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MB_HEADER_MAGIC equ 0x1BADB002
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MB_HEADER_FLAGS equ MB_AOUT_KLUDGE|MB_ALIGN|MB_MEMINFO
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CHECKSUM equ -(MB_HEADER_MAGIC + MB_HEADER_FLAGS)
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KERNEL_STACK equ 0x00200000 ; Stack starts at the 2mb address & grows down
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