8,11 → 8,13 |
;; ;; |
;; 32 bit PCI driver code ;; |
;; ;; |
;; Version 0.4 February 2nd, 2010 ;; |
;; Version 0.3 April 9, 2007 ;; |
;; Version 0.2 December 21st, 2002 ;; |
;; ;; |
;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
;; Mihailov Ilia, ghost.nsk@gmail.com ;; |
;; Artem Jerdev, kolibri@jerdev.co.uk ;; |
;; Credits: ;; |
;; Ralf Brown ;; |
;; Mike Hibbett, mikeh@oceanfree.net ;; |
30,7 → 32,7 |
; Description |
; entry point for system PCI calls |
;*************************************************************************** |
;mmio_pci_addr equ 0x400 ; set actual PCI address here to activate user-MMIO |
mmio_pci_addr dw 0x400 ; default PCI device bdf-address |
|
|
align 4 |
76,7 → 78,6 |
cmp al,10 |
jz pci_write_reg ;dword |
|
if defined mmio_pci_addr |
cmp al,11 ; user-level MMIO functions |
jz pci_mmio_init |
cmp al,12 |
83,8 → 84,8 |
jz pci_mmio_map |
cmp al,13 |
jz pci_mmio_unmap |
end if |
|
|
no_pci_access_for_applications: |
|
or eax,-1 |
384,7 → 385,7 |
; |
; Description |
; IN: bx = device's PCI bus address (bbbbbbbbdddddfff) |
; Returns eax = user heap space available (bytes) |
; Returns eax = phys. address of user-accessible DMA block |
; Error codes |
; eax = -1 : PCI user access blocked, |
; eax = -2 : device not registered for uMMIO service |
391,7 → 392,7 |
; eax = -3 : user heap initialization failure |
;*************************************************************************** |
pci_mmio_init: |
cmp bx, mmio_pci_addr |
cmp bx, [mmio_pci_addr] |
jz @f |
mov eax,-2 |
ret |
399,6 → 400,7 |
call init_heap ; (if not initialized yet) |
or eax,eax |
jz @f |
mov eax, [UserDMAaddr] |
ret |
@@: |
mov eax,-3 |
412,10 → 414,9 |
; Description |
; maps a block of PCI memory to user-accessible linear address |
; |
; WARNING! This VERY EXPERIMENTAL service is for one chosen PCI device only! |
; The target device address should be set in kernel var mmio_pci_addr |
; |
; IN: ah = BAR#; |
; IN: ah = BAR#; or |
; IN: ah = 0xDA for DMA-mapping requests; |
; IN: ebx = block size (bytes); |
; IN: ecx = offset in MMIO block (in 4K-pages, to avoid misaligned pages); |
; |
432,11 → 433,20 |
|
pci_mmio_map: |
and edx,0x0ffff |
cmp ah, 0xDA |
jz .dma_map |
cmp ah,6 |
jc .bar_0_5 |
jz .bar_rom |
mov eax,-2 |
ret |
|
.dma_map: |
push ecx |
mov ecx,ebx |
mov eax,[UserDMAaddr] |
jmp .allocate_block |
|
.bar_rom: |
mov ah, 8 ; bar6 = Expansion ROM base address |
.bar_0_5: |
448,7 → 458,7 |
shl bl, 1 |
shl bl, 1 |
add bl, 0x10 ; now bl = BAR offset in PCI config. space |
mov ax, mmio_pci_addr |
mov ax, [mmio_pci_addr] |
mov bh, al ; bh = dddddfff |
mov al, 2 ; al : DW to read |
call pci_read_reg |
465,7 → 475,9 |
pop ecx ; ecx = block size, bytes (expanded to whole page) |
mov ebx, ecx ; user_alloc destroys eax, ecx, edx, but saves ebx |
and eax, 0xFFFFFFF0 |
push eax ; store MMIO physical address + keep 2DWords in the stack |
|
.allocate_block: |
push eax ; store MMIO physical address + keep the stack 2x4b deep |
stdcall user_alloc, ecx |
or eax, eax |
jnz mmio_map_over |
484,9 → 496,7 |
pop edx ; edx = MMIO shift (pages) |
shl edx, 12 ; edx = MMIO shift (bytes) |
add eax, edx ; eax = uMMIO physical address |
or eax, PG_SHARED |
or eax, PG_UW |
or eax, PG_NOCACHE |
or eax, (PG_SHARED+PG_UW+PG_NOCACHE) |
mov edi, ebx |
call commit_pages |
mov eax, edi |