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chore: sync repo

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d0p1 🏳️‍⚧️ 2024-07-12 08:58:25 +02:00
parent 536f18f8cb
commit 180c1254e6
5 changed files with 185 additions and 31 deletions
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29
kernel/init.inc
View file

@ -1,29 +0,0 @@
struc TSS {
.prev_tss dd ?
.esp0 dd ?
.ss0 dd ?
.esp1 dd ?
.ss1 dd ?
.esp2 dd ?
.ss2 dd ?
.cr3 dd ?
.eip dd ?
.eflags dd ?
.eax dd ?
.ecx dd ?
.edx dd ?
.ebx dd ?
.esp dd ?
.ebp dd ?
.esi dd ?
.edi dd ?
.es dd ?
.cs dd ?
.ss dd ?
.ds dd ?
.fs dd ?
.gs dd ?
.ldt dd ?
.trap dw ?
.iomap dw ?
}

6
kernel/kernel.asm
View file

@ -52,7 +52,10 @@ kmain:
add ebx, KERNEL_VIRT_BASE
call pmm_free_range
; idt, gdt
; load kernel gdt
lgdt [pGDT]
; I don't think i need to reload segment cuz their value are already correct
.halt:
@ -69,6 +72,7 @@ kmain:
include 'dev/vga_console.inc'
include 'mm/mm.inc'
include 'lock.inc'
include 'gdt.inc'
szMsgKernelAlive db "Kernel is alive", 0
szErrorBootProtocol db "Error: wrong magic number", 0

12
kernel/klog.inc
View file

@ -10,6 +10,18 @@ CMOS_REG_HOUR = 0x04
COM1 = 0x3F8
;klog_kputc:
; mov dx, COM1 + 5
; push eax
;@@:
; in al, dx
; and al, 0x20
; jnz @b
; pop eax
; mov dx, COM1
; out dx, al
; ret
;; Function: klog_print
;;
;; In:

10
kernel/lock.inc
View file

@ -1,5 +1,9 @@
;; File: lock.inc
;;
;; Function: lock_acquire
;;
;; In:
;; EAX - lock address
lock_acquire:
mov edx, 1
xchg edx, [eax]
@ -7,6 +11,10 @@ lock_acquire:
jnz lock_acquire
ret
;; Function: lock_release
;;
;; In:
;; EAX - lock address
lock_release:
xor edx, edx
xchg [eax], edx

159
kernel/sys/cpu.inc Normal file
View file

@ -0,0 +1,159 @@
;; File: cpu.inc
;; Structure: tss
;;
;; > 31 23 15 7 0
;; > +----------|----------+----------|----------+
;; > 0x64 | I/O map base | 00000000 0000000T |
;; > +----------|----------+----------|----------+
;; > 0x60 | 00000000 00000000 | LDT |
;; > +----------|----------+----------|----------+
;; > 0x5c | 00000000 00000000 | GS |
;; > +----------|----------+----------|----------+
;; > 0x58 | 00000000 00000000 | FS |
;; > +----------|----------+----------|----------+
;; > 0x54 | 00000000 00000000 | DS |
;; > +----------|----------+----------|----------+
;; > 0x50 | 00000000 00000000 | SS |
;; > +----------|----------+----------|----------+
;; > 0x4C | 00000000 00000000 | CS |
;; > +----------|----------+----------|----------+
;; > 0x48 | 00000000 00000000 | ES |
;; > +----------|----------+----------|----------+
;; > 0x44 | EDI |
;; > +----------|----------+----------|----------+
;; > 0x40 | ESI |
;; > +----------|----------+----------|----------+
;; > 0x3C | EBP |
;; > +----------|----------+----------|----------+
;; > 0x38 | ESP |
;; > +----------|----------+----------|----------+
;; > 0x34 | EBX |
;; > +----------|----------+----------|----------+
;; > 0x30 | EDX |
;; > +----------|----------+----------|----------+
;; > 0x2C | ECX |
;; > +----------|----------+----------|----------+
;; > 0x28 | EAX |
;; > +----------|----------+----------|----------+
;; > 0x24 | EFLAGS |
;; > +----------|----------+----------|----------+
;; > 0x20 | EIP |
;; > +----------|----------+----------|----------+
;; > 0x1C | CR3 |
;; > +----------|----------+----------|----------+
;; > 0x18 | 00000000 00000000 | SS2 |
;; > +----------|----------+----------|----------+
;; > 0x14 | ESP2 |
;; > +----------|----------+----------|----------+
;; > 0x10 | 00000000 00000000 | SS1 |
;; > +----------|----------+----------|----------+
;; > 0x0C | ESP1 |
;; > +----------|----------+----------|----------+
;; > 0x08 | 00000000 00000000 | SS0 |
;; > +----------|----------+----------|----------+
;; > 0x04 | ESP0 |
;; > +----------|----------+----------|----------+
;; > 0x00 | 00000000 00000000 | old TSS selector |
;; > +----------|----------+----------|----------+
struc TSS {
.prev_tss dd ?
.esp0 dd ?
.ss0 dd ?
.esp1 dd ?
.ss1 dd ?
.esp2 dd ?
.ss2 dd ?
.cr3 dd ?
.eip dd ?
.eflags dd ?
.eax dd ?
.ecx dd ?
.edx dd ?
.ebx dd ?
.esp dd ?
.ebp dd ?
.esi dd ?
.edi dd ?
.es dd ?
.cs dd ?
.ss dd ?
.ds dd ?
.fs dd ?
.gs dd ?
.ldt dd ?
.trap dw ?
.iomap dw ?
}
;; Structure: idt_gate
;; .offset_low - TODO
;; .selector - TODO
;; .zero - TODO
;; .attributes - TODO
;; .offset_high - TODO
;;
struc idt_gate
.offset_low: resw 1
.selector: resw 1
.zero: resb 1
.attributes: resb 1
.offset_high: resw 1
endstruc
;; About: Gates
;; - Task Gate
;; > 31 23 15 7 0
;; > +----------------|----------------+-----------------|-----------------+
;; > | (NOT USED) | P DPL 0 0 1 0 1 (NOT USED) |
;; > +----------------|----------------+-----------------|-----------------+
;; > | SELECTOR | (NOT USED) |
;; > +----------------|----------------+-----------------|-----------------+
;;
;; - Interrupt Gate
;; > 31 23 15 7 0
;; > +----------------|----------------+-----------------|-----------------+
;; > | OFFSET 31..16 | P DPL 0 1 1 1 0 0 0 0 0 0 0 0 0 |
;; > +----------------|----------------+-----------------|-----------------+
;; > | SELECTOR | OFFSET 15..0 |
;; > +--------------- |----------------+-----------------|-----------------+
;;
;; - Trap Gate
;; > 31 23 15 7 0
;; > +----------------|----------------+-----------------|-----------------+
;; > | OFFSET 31..16 | P DPL 0 1 1 1 1 0 0 0 0 0 0 0 0 |
;; > +----------------|----------------+-----------------|-----------------+
;; > | SELECTOR | OFFSET 15..0 |
;; > +--------------- |----------------+-----------------|-----------------+
struc intframe
;; registers
.edi: resd 1
.esi: resd 1
.ebp: resd 1
.esp: resd 1
.ebx: resd 1
.edx: resd 1
.ecx: resd 1
.eax: resd 1
;;
.gs: resd 1
.fs: resd 1
.es: resd 1
.ds: resd 1
.intno: resd 1
;; by x86 hardware
.err: resd 1
.eip: resd 1
.cs: resd 1
.eflags: resd 1
;; crossring
.useresp: resd 1
.ss: resd 1
endstruc