108 lines
2.4 KiB
NASM
108 lines
2.4 KiB
NASM
include 'cfg_bios.inc'
|
|
use16
|
|
org 0
|
|
|
|
rom_header:
|
|
; PnP Option ROM header
|
|
rom_signature dw 0xAA55 ; +0 : magic
|
|
rom_length db 1 ; +2 : number of 512byte blocks
|
|
rom_entry:
|
|
jmp init_entry ; +3 : initialization entry point
|
|
; retf ; +5
|
|
@@:
|
|
times (24-$) db 0 ; : left blank
|
|
rom_pci_struc dw pci_header ; +18h : offset to PCI data structure
|
|
|
|
times (32-$) db 0
|
|
|
|
; +32
|
|
pci_header:
|
|
; PCI Data Structure
|
|
pci_magic db 'PCIR' ; +0 : magic
|
|
pci_vendor dw BIOS_PCI_VENDOR ; +4 : 10EE
|
|
pci_device dw BIOS_PCI_DEVICE ; +6 : 0007
|
|
pci_vdata dw 0 ; +8 : 0 = no vital product data
|
|
pci_length dw 0x18 ; +A : PCI data structure length
|
|
pci_classrev dd BIOS_PCI_CLASS ; +C : rev.00 + class 05.00.00
|
|
pci_size dw 1 ; +10 : image length (512byte blocks)
|
|
pci_rev dw 0 ; +12
|
|
pci_codetype db 0 ; +14 : x86
|
|
pci_indicator db 0x80 ; +15 : last image
|
|
pci_maxlen dw 1 ; +16 : max length (512b blocks)
|
|
pci_hdrptr dw 0; manstr ; +18 : ExROM's config utility code header
|
|
pci_dmtf_entry dw 0 ; +1A : DMTP CLP entry point
|
|
|
|
times (64-$) db 0
|
|
|
|
manstr:
|
|
db 1,'Kolibri-A Operating System',13,10,0
|
|
; utility code header size = 42 bytes
|
|
times (64+41-$) db 0 ;
|
|
db 1 ; ver.1
|
|
|
|
utility_entry:
|
|
jmp boot_failure
|
|
times (128-$) db 0
|
|
|
|
;align 128
|
|
|
|
boot_failure:
|
|
int 18h ; return to BIOS Boot sequence
|
|
|
|
align 4
|
|
init_entry:
|
|
; note x86 "unreal" mode!
|
|
; ax = b:d.f
|
|
; bx = run-time segment
|
|
; cx = PMM segment
|
|
; dx = PMM entry offset
|
|
|
|
mov dx, 0x0cf8 ; PCI config address
|
|
; mov eax, 0x80010010 ; BAR0
|
|
and eax, 0x0FFFF
|
|
shl eax, 8
|
|
or eax, 0x80000010 ;BAR0
|
|
out dx, eax
|
|
out dx, eax
|
|
add dl, 4
|
|
in eax, dx
|
|
and eax, 0xFFFFFF00
|
|
add eax, 0x0400 ; LPC control reg
|
|
mov dword[eax], 0x90050000 ; LED port
|
|
mov dword[eax+4], 0x055
|
|
xor eax, eax
|
|
sub dl, 4
|
|
out dx, eax
|
|
mov bx, ax
|
|
retf
|
|
|
|
|
|
; mov edx,[esp] ; get the origin
|
|
; and dl, 0xF0
|
|
; shl ebx, 4 ; correct run-time address
|
|
; mov cx, 0 ; words counter
|
|
;@@:
|
|
; mov ax, word[edx+ecx]
|
|
; mov [ebx+ecx],ax
|
|
; inc cx
|
|
; inc cx
|
|
; test cx,0x200
|
|
; jz @b
|
|
; xor ax, ax
|
|
; mov bx, ax
|
|
; mov al, 0x20 ; IPL device's attached
|
|
|
|
; retd ; double !
|
|
|
|
|
|
times (0xDF-$) db 0 ; checksum position
|
|
|
|
sum = 0
|
|
repeat $-$$
|
|
load a byte from $$+% -1
|
|
sum = a + sum
|
|
end repeat
|
|
check = sum mod 256
|
|
check_byte db (0x100 - check ) mod 256
|
|
|
|
times (512-$) db 0 |