| 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 |