441 lines
4.6 KiB
ArmAsm
441 lines
4.6 KiB
ArmAsm
global loader
|
|
|
|
section .__mbHeader
|
|
|
|
align 0x4
|
|
section .text:
|
|
|
|
MAGIC_NUMBER equ 0x1BADB002 ; multiboot magic
|
|
FLAGS equ 0x0
|
|
CHECKSUM equ -MAGIC_NUMBER
|
|
KERNEL_STACK_SIZE equ 4096
|
|
|
|
dd MAGIC_NUMBER
|
|
dd FLAGS
|
|
dd CHECKSUM
|
|
|
|
extern kmain
|
|
|
|
loader:
|
|
cli
|
|
; mov eax, 0xCAFEBABE
|
|
push dword 42
|
|
call kmain
|
|
|
|
.loop:
|
|
jmp .loop
|
|
|
|
global gdt_flush
|
|
extern gp
|
|
|
|
gdt_flush:
|
|
lgdt [gp]
|
|
mov ax, 0x10
|
|
mov ds, ax
|
|
mov es, ax
|
|
mov fs, ax
|
|
mov gs, ax
|
|
mov ss, ax
|
|
jmp 0x08:flush2
|
|
|
|
flush2:
|
|
ret
|
|
|
|
global idt_load
|
|
extern idtp
|
|
|
|
idt_load:
|
|
lidt [idtp]
|
|
ret
|
|
|
|
global isr0
|
|
global isr1
|
|
global isr2
|
|
global isr3
|
|
global isr4
|
|
global isr5
|
|
global isr6
|
|
global isr7
|
|
global isr8
|
|
global isr9
|
|
global isr10
|
|
global isr11
|
|
global isr12
|
|
global isr13
|
|
global isr14
|
|
global isr15
|
|
global isr16
|
|
global isr17
|
|
global isr18
|
|
global isr19
|
|
global isr20
|
|
global isr21
|
|
global isr22
|
|
global isr23
|
|
global isr24
|
|
global isr25
|
|
global isr26
|
|
global isr27
|
|
global isr28
|
|
global isr29
|
|
global isr30
|
|
global isr31
|
|
|
|
; Interrupt service routine exceptions
|
|
isr0:
|
|
cli
|
|
push byte 0
|
|
push byte 0
|
|
jmp isr_common_stub
|
|
|
|
isr1:
|
|
cli
|
|
push byte 0
|
|
push byte 1
|
|
jmp isr_common_stub
|
|
|
|
isr2:
|
|
cli
|
|
push byte 0
|
|
push byte 2
|
|
jmp isr_common_stub
|
|
|
|
isr3:
|
|
cli
|
|
push byte 0
|
|
push byte 3
|
|
jmp isr_common_stub
|
|
|
|
isr4:
|
|
cli
|
|
push byte 0
|
|
push byte 4
|
|
jmp isr_common_stub
|
|
|
|
isr5:
|
|
cli
|
|
push byte 0
|
|
push byte 5
|
|
jmp isr_common_stub
|
|
|
|
isr6:
|
|
cli
|
|
push byte 0
|
|
push byte 6
|
|
jmp isr_common_stub
|
|
|
|
isr7:
|
|
cli
|
|
push byte 0
|
|
push byte 7
|
|
jmp isr_common_stub
|
|
|
|
isr8:
|
|
cli
|
|
push byte 8
|
|
jmp isr_common_stub
|
|
|
|
isr9:
|
|
cli
|
|
push byte 0
|
|
push byte 9
|
|
jmp isr_common_stub
|
|
|
|
isr10:
|
|
cli
|
|
push byte 10
|
|
jmp isr_common_stub
|
|
|
|
isr11:
|
|
cli
|
|
push byte 11
|
|
jmp isr_common_stub
|
|
|
|
isr12:
|
|
cli
|
|
push byte 12
|
|
jmp isr_common_stub
|
|
|
|
isr13:
|
|
cli
|
|
push byte 13
|
|
jmp isr_common_stub
|
|
|
|
isr14:
|
|
cli
|
|
push byte 14
|
|
jmp isr_common_stub
|
|
|
|
isr15:
|
|
cli
|
|
push byte 0
|
|
push byte 15
|
|
jmp isr_common_stub
|
|
|
|
isr16:
|
|
cli
|
|
push byte 0
|
|
push byte 16
|
|
jmp isr_common_stub
|
|
|
|
isr17:
|
|
cli
|
|
push byte 0
|
|
push byte 17
|
|
jmp isr_common_stub
|
|
|
|
isr18:
|
|
cli
|
|
push byte 0
|
|
push byte 18
|
|
jmp isr_common_stub
|
|
|
|
isr19:
|
|
cli
|
|
push byte 0
|
|
push byte 19
|
|
jmp isr_common_stub
|
|
|
|
isr20:
|
|
cli
|
|
push byte 0
|
|
push byte 20
|
|
jmp isr_common_stub
|
|
|
|
isr21:
|
|
cli
|
|
push byte 0
|
|
push byte 21
|
|
jmp isr_common_stub
|
|
|
|
isr22:
|
|
cli
|
|
push byte 0
|
|
push byte 22
|
|
jmp isr_common_stub
|
|
|
|
isr23:
|
|
cli
|
|
push byte 0
|
|
push byte 23
|
|
jmp isr_common_stub
|
|
|
|
isr24:
|
|
cli
|
|
push byte 0
|
|
push byte 24
|
|
jmp isr_common_stub
|
|
|
|
isr25:
|
|
cli
|
|
push byte 0
|
|
push byte 25
|
|
jmp isr_common_stub
|
|
|
|
isr26:
|
|
cli
|
|
push byte 0
|
|
push byte 26
|
|
jmp isr_common_stub
|
|
|
|
isr27:
|
|
cli
|
|
push byte 0
|
|
push byte 27
|
|
jmp isr_common_stub
|
|
|
|
isr28:
|
|
cli
|
|
push byte 0
|
|
push byte 28
|
|
jmp isr_common_stub
|
|
|
|
isr29:
|
|
cli
|
|
push byte 0
|
|
push byte 29
|
|
jmp isr_common_stub
|
|
|
|
isr30:
|
|
cli
|
|
push byte 0
|
|
push byte 30
|
|
jmp isr_common_stub
|
|
|
|
isr31:
|
|
cli
|
|
push byte 0
|
|
push byte 31
|
|
jmp isr_common_stub
|
|
|
|
extern fault_handler
|
|
|
|
isr_common_stub:
|
|
pusha
|
|
push ds
|
|
push es
|
|
push fs
|
|
push gs
|
|
mov ax, 0x10
|
|
mov ds, ax
|
|
mov es, ax
|
|
mov fs, ax
|
|
mov gs, ax
|
|
mov eax, esp
|
|
push eax
|
|
mov eax, fault_handler
|
|
call eax
|
|
pop eax
|
|
pop gs
|
|
pop fs
|
|
pop es
|
|
pop ds
|
|
popa
|
|
add esp, 8
|
|
iret
|
|
|
|
global irq0
|
|
global irq1
|
|
global irq2
|
|
global irq3
|
|
global irq4
|
|
global irq5
|
|
global irq6
|
|
global irq7
|
|
global irq8
|
|
global irq9
|
|
global irq10
|
|
global irq11
|
|
global irq12
|
|
global irq13
|
|
global irq14
|
|
global irq15
|
|
|
|
irq0:
|
|
cli
|
|
push byte 0
|
|
push byte 32
|
|
jmp irq_common_stub
|
|
|
|
irq1:
|
|
cli
|
|
push byte 0
|
|
push byte 33
|
|
jmp irq_common_stub
|
|
|
|
irq2:
|
|
cli
|
|
push byte 0
|
|
push byte 34
|
|
jmp irq_common_stub
|
|
|
|
irq3:
|
|
cli
|
|
push byte 0
|
|
push byte 35
|
|
jmp irq_common_stub
|
|
|
|
irq4:
|
|
cli
|
|
push byte 0
|
|
push byte 36
|
|
jmp irq_common_stub
|
|
|
|
irq5:
|
|
cli
|
|
push byte 0
|
|
push byte 37
|
|
jmp irq_common_stub
|
|
|
|
irq6:
|
|
cli
|
|
push byte 0
|
|
push byte 38
|
|
jmp irq_common_stub
|
|
|
|
irq7:
|
|
cli
|
|
push byte 0
|
|
push byte 39
|
|
jmp irq_common_stub
|
|
|
|
irq8:
|
|
cli
|
|
push byte 0
|
|
push byte 40
|
|
jmp irq_common_stub
|
|
|
|
irq9:
|
|
cli
|
|
push byte 0
|
|
push byte 41
|
|
jmp irq_common_stub
|
|
|
|
irq10:
|
|
cli
|
|
push byte 0
|
|
push byte 42
|
|
jmp irq_common_stub
|
|
|
|
irq11:
|
|
cli
|
|
push byte 0
|
|
push byte 43
|
|
jmp irq_common_stub
|
|
|
|
irq12:
|
|
cli
|
|
push byte 0
|
|
push byte 44
|
|
jmp irq_common_stub
|
|
|
|
irq13:
|
|
cli
|
|
push byte 0
|
|
push byte 45
|
|
jmp irq_common_stub
|
|
|
|
irq14:
|
|
cli
|
|
push byte 0
|
|
push byte 46
|
|
jmp irq_common_stub
|
|
|
|
irq15:
|
|
cli
|
|
push byte 0
|
|
push byte 47
|
|
jmp irq_common_stub
|
|
|
|
extern irq_handler
|
|
|
|
irq_common_stub:
|
|
pusha
|
|
push ds
|
|
push es
|
|
push fs
|
|
push gs
|
|
mov ax, 0x10
|
|
mov ds, ax
|
|
mov es, ax
|
|
mov fs, ax
|
|
mov gs, ax
|
|
mov eax, esp
|
|
push eax
|
|
mov eax, irq_handler
|
|
call eax
|
|
pop eax
|
|
pop gs
|
|
pop fs
|
|
pop es
|
|
pop ds
|
|
popa
|
|
add esp, 8
|
|
iret
|
|
|
|
section .bss
|
|
align 4
|
|
kernel_stack:
|
|
resb KERNEL_STACK_SIZE
|
|
mov esp, kernel_stack + KERNEL_STACK_SIZE
|