diff options
| author | Aleksa Vučković <aleksav013@gmail.com> | 2021-10-11 11:35:59 +0200 |
|---|---|---|
| committer | Aleksa Vučković <aleksav013@gmail.com> | 2021-10-11 11:35:59 +0200 |
| commit | 578d467b80015c52d0c96c8443b4c13936f33365 (patch) | |
| tree | 05525782bc3baf5a01d8b657f01934e1e598a775 /src/boot.s | |
| parent | 3a9ccbd8e762477f75d8b164a1d99383a01414ae (diff) | |
(IDT + keyboard) finally working
Diffstat (limited to 'src/boot.s')
| -rw-r--r-- | src/boot.s | 57 |
1 files changed, 47 insertions, 10 deletions
@@ -12,33 +12,70 @@ .global _start .global load_gdt +.global load_idt +.global enable_interrupts +.global keyboard_handler +.global ioport_in +.global ioport_out + +.extern init_gdt_table +.extern handle_keyboard_interrupt +.extern kernel_main load_gdt: movl 4(%esp), %edx lgdt (%edx) ret +load_idt: + movl 4(%esp), %edx + lidt (%edx) + sti + ret + +keyboard_handler: + pushal + cld + call handle_keyboard_interrupt + popal + iretl + +ioport_in: + movl 4(%esp),%edx + in %dx,%al + ret + +ioport_out: + movl 4(%esp),%edx + movl 8(%esp),%eax + outb %al,%dx + ret + +.set CODE_SEGMENT, 0x08 +.set DATA_SEGMENT, 0x10 + .section .bss .align 16 stack_bottom: -.skip 16384 # 16 KiB +.skip 16384 stack_top: .section .text .type _start, @function _start: call init_gdt_table - mov 0x10, %ax - mov %ds, %ax - mov %es, %ax - mov %fs, %ax - mov %gs, %ax - mov %ss, %ax - mov $stack_top, %esp + ljmp $CODE_SEGMENT, $next + next: + movw $DATA_SEGMENT, %ax + movw %ax, %ds + movw %ax, %es + movw %ax, %fs + movw %ax, %gs + movw %ax, %ss + movl $stack_top, %esp cli call _init call kernel_main -1: hlt - jmp 1b + hlt .size _start, . - _start |