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