Jakob Kjær-Kammersgaard
7 anni fa
8 ha cambiato i file con 423 aggiunte e 72 eliminazioni
@ -1,13 +1,13 @@
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#!/bin/bash |
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if [ "$1" != "run" ]; then |
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nasm -fbin bootloader.nasm -o bootloader.bin |
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nasm -fbin kernel.nasm -o kernel.bin |
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cat bootloader.bin kernel.bin > SingOS.img |
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nasm -fbin bootloader.nasm -o bootloader.bin |
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nasm -fbin vbr.nasm -o vbr.bin |
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nasm -fbin filesystems/lsfs/test_lsfs.nasm -o lsfs.bin |
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nasm -fbin kernel.nasm -o kernel.bin |
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cat bootloader.bin vbr.bin lsfs.bin kernel.bin > SingOS.img |
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fi |
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if [ "$1" != "make" ]; then |
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qemu-system-x86_64 -drive index=0,format=raw,file=SingOS.img |
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qemu-system-x86_64 -drive index=0,format=raw,file=SingOS.img |
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fi |
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echo "Done" |
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@ -0,0 +1,23 @@
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BITS 16 |
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%define LSFS_magic_start_sector 24 |
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;This is for the FSCI, where this is stored on the disk. |
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lsfs_format_disk_buffer db 'LSFS v0.1.1-exp', 13, 10, '(LessSimpelFileSystem)', 13, 10, 'Developed to SingOS', 13, 10, 'by Jorn Guldberg', 13, 10, 0 ; 66 chars + 8 bytes |
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times 506-($-$$) db 0 |
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dw LSFS_magic_start_sector, 3, 2306 ; Start index, number of files, next free index |
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; 4 is right now the next number of file |
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; This is the data that is in the file system file. |
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lfsf_systemcall: |
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mov ax, 0 |
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mov ah, 0x10 |
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int 0x16 |
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mov ah, 0x0e |
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mov al, 65 ; backspace |
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int 0x10 ; print char |
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ret |
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File_System_Control_information: |
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;(FSCI) |
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times 4608-($-$$) db 0 |
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@ -0,0 +1,226 @@
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BITS 16 |
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%define DISK_SERVICE 0x0050:0x0256 |
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%define KERNEL 0x0050:0x0512 |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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vbr_lfsf: |
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; Volume Boot Record |
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; This will start SingOS from the disk |
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; The disk format has to be LessSimpleFileSystem |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; loading essentials for SingOS to run |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; SYSTEM CALL TABLE STARTING AT POSITION 0x0050:0x0000 |
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; To already support 64-bit, the entries is 64-bit |
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; But in 16-bit, the adresses is only 16-bit |
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; These are stored in the first 16-bits |
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; There is reserved 2 sectors to the table witch means that we have room for |
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; 128 System Calls |
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; |----|----------------------------------------------------------------------------| |
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; | 1 | Master Table| call [0x0050:0x0000] Pointer to the Master File Table | |
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; |----|----------------------------------------------------------------------------| |
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; | 2 | FILE SYSTEM | call [0x0050:0x0008] for arguments see under the file system | |
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; |----|----------------------------------------------------------------------------| |
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; | 3 | OS_LIB | call [0x0050:0x0016] for arguments see under the file system | |
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; |----|----------------------------------------------------------------------------| |
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; | 1 | FILE SYSTEM | call [0x0050:0x0000] for arguments see under the file system | |
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; |----|----------------------------------------------------------------------------| |
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; | 2 | OS_LIB | call [0x0050:0x0008] for arguments see under the file system | |
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; |----|----------------------------------------------------------------------------| |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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mov [vbr_disk_identifier], dl ; saving disk_identifier, this is the number the disk that we are booting from. |
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; This number is set by the bios |
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xor ax, ax |
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mov al, dl |
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mov al, [vbr_disk_identifier] |
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mov [vbr_lba_position_at_disk], ax ; From the MBR we need information of where we are located at the disk. |
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; If this fails, we could lookup our self, in the MBR where we are located. |
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;mov ax, 0x50 |
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;mov cs, ax |
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;mov ds, ax |
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;mov ax, 0x8fc0 |
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;mov ss, ax ; Set 'ss' to this location (the beginning of our stack region) |
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;mov sp, 0xffff ; Set 'ss:sp' to the top of our 8K stack |
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;mov bp, sp |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; The system has to support int13 bios extended system calls, otherwise is SingOS not supporting the hardware. |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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mov ah, 0x41 ;Set AH = 0x41 |
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mov bx, 0x55aa ;BX = 0x55AA |
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mov dl, [vbr_disk_identifier] ;DL = disk_id |
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int 0x13 ;Issue an INT 0x13. |
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jc .is_not_supported |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; The system is suportted |
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; We are now loading the filesystem |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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;mov WORD bx, [vbr_lba_position_at_disk] |
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mov WORD [DAPACK.lba_addr_dw_low], 89 |
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mov WORD [DAPACK.blkcnt], 0x08 ; Read to sectors, that is what the space is for the buffer in svim |
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mov WORD [DAPACK.db_addr_segment], 0x50 |
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mov WORD [DAPACK.db_addr_offset], 0x256 |
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mov si, DAPACK ; address of "disk address packet" |
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mov ah, 0x42 ; READ |
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mov dl, [vbr_disk_identifier] |
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int 0x13 |
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;call dumpax |
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;call DISK_SERVICE |
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mov [vbr_disk_identifier], dl |
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mov al, dl |
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;call DISK_SERVICE |
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;mov ax, 0 |
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;mov ah, 0x10 |
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;int 0x16 |
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;mov ah, 0x0e |
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;mov al, 66 ; backspace |
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;int 0x10 ; print char |
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;call DISK_SERVICE |
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;mov ax, 0 |
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;mov ah, 0x10 |
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;int 0x16 |
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;mov ah, 0x0e |
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;mov al, 66 ; backspace |
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;int 0x10 ; print char |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; The disk service is now loaded. |
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; Now we are going to load the Master table. |
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; |
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; We are now loading the filesystem |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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mov WORD [DAPACK.lba_addr_dw_low], 97 |
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mov WORD [DAPACK.blkcnt], 0x1f |
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mov WORD [DAPACK.db_addr_segment], 0x50 |
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mov WORD [DAPACK.db_addr_offset], 0x0512 |
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mov si, DAPACK ; address of "disk address packet" |
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mov ah, 0x42 ; READ |
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mov dl, [vbr_disk_identifier] |
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int 0x13 |
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;call dumpax |
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xor ax, ax |
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mov dl, [vbr_disk_identifier] |
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mov al, dl |
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;call dumpax |
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mov dl, [vbr_disk_identifier] |
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jmp KERNEL |
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nop |
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cli |
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hlt |
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.is_not_supported: |
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; The System does support exented read write |
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mov si, lsfs_disk_error_msg |
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;call print |
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;Routine for printing a 'ax' as hex |
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dumpax: |
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pusha ; save registers |
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mov bx, ax |
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mov ah, 0xE ; Teletype output |
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mov cx, 4 ; 4 nipples in a 16 bit word |
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.loop: |
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rol bx, 4 ; rotate to next nipple |
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mov al, bl ; we copy to al because we need to mask only the low 4 bits |
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and al, 1111b ; Do the masking |
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add al, '0' ; convert to ASCII |
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cmp al, '9' ; If we are greater than 9 ascii, we add 7 to make digit 10 be represented as 'A' |
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jbe .skip ; -|- |
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add al, 7 ; -|- |
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.skip: ; -|- |
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int 0x10 ; BIOS call 'output' |
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loop .loop |
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popa ; restore registers |
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ret |
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vbr_disk_identifier db 0 |
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vbr_lba_position_at_disk dw 0 |
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lsfs_disk_error_msg db 'The system does not support disk operations,', 13, 10, 0 |
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DAPACK: |
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.dap_Size: db 0x10 ; This is always 16 bytes (0x10) |
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.rev_byte: db 0x0 ; reserved byte, should always be zero |
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.blkcnt: dw 0x0 ; int 13 resets this to # of blocks actually read/written |
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.db_addr_offset: dw 0x0 ; memory buffer destination address (0:7c00) |
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.db_addr_segment: dw 0x0 ; in memory page zero |
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.lba_addr_dw_low: dd 0x0 ; put the lba to read in this spot |
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.lba_addr_dw_high: dd 0x0 ; more storage bytes only for big lba's ( > 4 bytes ) |
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times 4096-($-$$) db 0 |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; HERE START THE FILE SYSTEM |
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; This is the Master Table |
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; This is the fixed entries when the system is compilet |
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; DEFAULT SIZE IS 64 FILES |
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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; Entry one: |
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;.filename: |
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db 'File_System_Control_information', 0 |
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times 224 db 0 |
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;.file_id: |
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dw 0x0, 0x0, 0x0, 0x00 ; 64-bits |
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;.file_size |
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dw 512, 0x0, 0x0, 0x0 ; 64-bits Should be the actual number of bytes. |
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;.ext_file_data 64-bits (Extended data about the file, timestamps etc.) |
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dw 0x0, 0x0, 0x0, 0x0 |
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;control_bits 64-bits |
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dw 0x0, 0x0, 0x0, 0x0 |
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;.file_data_pointers |
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dw 88, 0x0, 0x0, 0x0 |
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times 216 db 0 |
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; Entry Two: |
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db 'LessSimpelFileSystem', 0 |
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times 235 db 0 |
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;.file_id: |
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dw 0x01, 0x0, 0x0, 0x0 |
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;.file_size |
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dw 4096, 0x0, 0x0, 0x0 |
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;.ext_file_data 64-bits (Extended data about the file, timestamps etc.) |
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dw 0x0, 0x0, 0x0, 0x0 |
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;control_bits 64-bits |
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dw 0x0, 0x0, 0x0, 0x0 |
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;.file_data_pointers |
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dw 89, 0x0, 0x0, 0x0 |
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times 216 db 0 |
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; Entry Three: |
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db 'kernel', 0 |
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times 249 db 0 |
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;.file_id: |
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dw 0x02, 0x0, 0x0, 0x0 |
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;.file_size |
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dw 0x00, 0x10, 0x0, 0x0 |
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;.ext_file_data 64-bits (Extended data about the file, timestamps etc.) |
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dw 0x0, 0x0, 0x0, 0x0 |
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;control_bits 64-bits |
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dw 0x0, 0x0, 0x0, 0x0 |
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;.file_data_pointers |
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dw 97, 0x0, 0x0, 0x0 |
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times 216 db 0 |
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times 4096 + (32768-($-$$)) db 0 |
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