65 lines
1.6 KiB
NASM
Executable File
65 lines
1.6 KiB
NASM
Executable File
|
|
PCI_CONFIG_ADDRESS_PORT equ 0x0cf8
|
|
PCI_CONFIG_DATA_PORT equ 0x0cfc
|
|
|
|
PCI_DEVICE_COUNT_OFFSET equ 0xffe
|
|
PCI_DEVICE_AREA_OFFSET equ 0x1000
|
|
|
|
; [FURTHEST FROM BP]
|
|
; 0. Ptr32 Pointer to 65536B slot for PCI driver
|
|
; [NEAREST TO BP]
|
|
initialize_pci_driver:
|
|
push dword esi
|
|
sub esp, 64
|
|
mov esi, esp
|
|
|
|
mov [esi + (64 - 4)], eax
|
|
mov [esi + (64 - 8)], ebx
|
|
mov [esi + (64 - 12)], ecx
|
|
mov [esi + (64 - 16)], edx
|
|
mov [esi + (64 - 20)], edi
|
|
|
|
.body:
|
|
mov ebx, [ebp - 4]
|
|
push ebp
|
|
mov ebp, esp
|
|
push ebx
|
|
push dword 0 ; No Maximum Device Limit
|
|
call pci_enumerate
|
|
mov esp, ebp
|
|
pop ebp
|
|
|
|
mov ebx, [ebp - 4]
|
|
add ebx, PCI_DEVICE_COUNT_OFFSET
|
|
|
|
push ebp
|
|
mov ebp, esp
|
|
push ebx
|
|
push dword 2
|
|
push dword 0
|
|
push dword 0
|
|
call write_hexadecimal_string
|
|
mov esp, ebp
|
|
pop ebp
|
|
|
|
; todo(wip): Remove this once the PCI Driver
|
|
; is debugged completely.
|
|
|
|
cli
|
|
hlt
|
|
|
|
.epilog:
|
|
mov eax, [esi + (64 - 4)]
|
|
mov ebx, [esi + (64 - 8)]
|
|
mov ecx, [esi + (64 - 12)]
|
|
mov edx, [esi + (64 - 16)]
|
|
mov edi, [esi + (64 - 20)]
|
|
|
|
add esp, 64
|
|
pop dword esi
|
|
ret
|
|
.storage:
|
|
dd 0
|
|
|
|
%include "drivers/pci/enumerate.asm"
|