feat(kernel): pic initialize and remap
This commit is contained in:
parent
649b68ee39
commit
bd7468e69c
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@ -16,3 +16,7 @@ vga_console_clear:
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rep stosb
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ret
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vga_console_putc:
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ret
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1
kernel/fs/fat.inc
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1
kernel/fs/fat.inc
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@ -0,0 +1 @@
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;; File: fat.inc
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5
kernel/fs/stpdfs.inc
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5
kernel/fs/stpdfs.inc
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@ -0,0 +1,5 @@
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;; File: stpdfs.inc
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STPDFS_SB_MAGIC = 0x44505453
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STPDFS_SB_REV = 1
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@ -21,9 +21,9 @@ gdt:
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db 0x00, 0xF2, 0xCF, 0x00
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; Tss
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;.tss:
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; dw ?
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; dd ?
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.tss:
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dw ?
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dd ?
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.end:
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3
kernel/irq.inc
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3
kernel/irq.inc
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@ -0,0 +1,3 @@
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irq_timer:
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iret
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@ -26,6 +26,15 @@ idt_setup:
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cmp ecx, 32
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jb @b
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mov ecx, 0x42
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mov eax, isr_syscall
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mov [aInterruptGate + (ecx * 8)], ax
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mov [aInterruptGate + (ecx * 8) + 2], word 0x08
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mov [aInterruptGate + (ecx * 8) + 5], word 0x8E
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shr eax, 16
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mov [aInterruptGate + (ecx * 8) + 6], ax
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lidt [pIDT]
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sti
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ret
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@ -2,6 +2,8 @@
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format binary
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include 'const.inc'
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include 'sys/bootinfo.inc'
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include 'sys/cpu.inc'
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org KBASE
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use32
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@ -52,15 +54,16 @@ kmain:
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add ebx, KERNEL_VIRT_BASE
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call pmm_free_range
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call pic_init
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; load kernel gdt
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lgdt [pGDT]
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; I don't think i need to reload segment cuz their value are already correct
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xchg bx, bx
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call pic_disable
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call idt_setup
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int 0x42
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.halt:
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hlt
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@ -71,20 +74,23 @@ kmain:
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call klog
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jmp .halt
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include 'sys/bootinfo.inc'
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include 'klog.inc'
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include 'dev/vga_console.inc'
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include 'mm/mm.inc'
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include 'lock.inc'
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include 'gdt.inc'
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include 'syscall.inc'
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include 'isr.inc'
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include 'pic.inc'
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szMsgKernelAlive db "Kernel is alive", 0
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szErrorBootProtocol db "Error: wrong magic number", 0
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boot_structure BootInfo
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kTSS TSS
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align 4096
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stack_bottom:
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rb 0x4000
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@ -6,10 +6,47 @@ PIC1_DATA = 0x21
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PIC2_COMMAND = 0xA0
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PIC2_DATA = 0xA1
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PIC_ICW1 = 0x10
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PIC_ICW1_IC4 = 0x01
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PIC_ICW1_SNGL = 0x02
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PIC_ICW1_ADI = 0x04
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PIC_ICW1_LTIM = 0x08
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PIC_ICW4_8086 = 0x01
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PIC_ICW4_AEOI = 0x02
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PIC_ICW4_MSTR = 0x04
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PIC_ICW4_BUF = 0x08
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PIC_ICW4_SFNM = 0x10
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PIC_EOI = 0x20
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pic_init:
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; ICW 1
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mov al, PIC_ICW1 or PIC_ICW1_IC4
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out PIC1_COMMAND, al
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out PIC2_COMMAND, al
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; ICW 2
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mov al, 0x20
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out PIC1_DATA, al
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mov al, 0x28
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out PIC2_DATA, al
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; ICW 3
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mov al, 0x4
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out PIC1_DATA, al
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mov al, 0x2
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out PIC2_DATA, al
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; ICW 4
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mov al, PIC_ICW4_8086
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out PIC1_DATA, al
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out PIC2_DATA, al
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xor al, al
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out PIC1_DATA, al
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out PIC2_DATA, al
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ret
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@ -88,21 +88,24 @@ struc TSS {
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.iomap dw ?
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}
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;; Structure: idt_gate
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struc GDTGate {
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}
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;; Structure: IDTGate
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;; .offset_low - TODO
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;; .selector - TODO
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;; .zero - TODO
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;; .attributes - TODO
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;; .offset_high - TODO
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;;
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struc idt_gate
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.offset_low: resw 1
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.selector: resw 1
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.zero: resb 1
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.attributes: resb 1
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.offset_high: resw 1
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endstruc
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defn idt_gate
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struc IDTGate {
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.offset_low dw ?
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.selector dw ?
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.zero db 0
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.attributes db ?
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.offset_high dw ?
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}
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;; About: Gates
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;; - Task Gate
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@ -130,31 +133,31 @@ defn idt_gate
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;; > +--------------- |----------------+-----------------|-----------------+
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struc intframe
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struc intframe {
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;; registers
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.edi: resd 1
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.esi: resd 1
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.ebp: resd 1
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.esp: resd 1
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.ebx: resd 1
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.edx: resd 1
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.ecx: resd 1
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.eax: resd 1
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.edi dd ?
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.esi dd ?
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.ebp dd ?
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.esp dd ?
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.ebx dd ?
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.edx dd ?
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.ecx dd ?
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.eax dd ?
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;;
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.gs: resd 1
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.fs: resd 1
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.es: resd 1
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.ds: resd 1
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.intno: resd 1
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.gs dd ?
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.fs dd ?
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.es dd ?
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.ds dd ?
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.intno dd ?
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;; by x86 hardware
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.err: resd 1
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.eip: resd 1
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.cs: resd 1
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.eflags: resd 1
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.err dd ?
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.eip dd ?
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.cs dd ?
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.eflags dd ?
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;; crossring
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.useresp: resd 1
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.ss: resd 1
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endstruc
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.useresp dd ?
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.ss dd ?
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}
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10
kernel/syscall.inc
Normal file
10
kernel/syscall.inc
Normal file
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@ -0,0 +1,10 @@
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SYSCALL_EXIT = 0x01
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SYSCALL_FORK = 0x02
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isr_syscall:
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push eax
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mov esi, szMsgSyscall
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call klog
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iret
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szMsgSyscall db "syscall %x", 0
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