new API functions 62:11-13 added (user access to MMIO)
git-svn-id: svn://kolibrios.org@1346 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Artem Jerdev (art_zh)
parent
58d22770cb
commit
14877cb5a0
51
pci16.inc
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51
pci16.inc
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; PCI16.INC ;;
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;; ;;
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;; 16 bit PCI driver code ;;
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;; ;;
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;; Version 0.2 December 21st, 2002 ;;
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;; ;;
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;; Author: Victor Prodan, victorprodan@yahoo.com ;;
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;; ;;
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;; See file COPYING for details ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 593 $
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init_pci_16:
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pushad
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xor ax,ax
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mov es,ax
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mov byte [es:0x9020],1 ;default mechanism:1
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mov ax,0xb101
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int 0x1a
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or ah,ah
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jnz pci16skip
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mov [es:0x9021],cl ;last PCI bus in system
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mov [es:0x9022],bx
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mov [es:0x9024],edi
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; we have a PCI BIOS, so check which configuration mechanism(s)
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; it supports
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; AL = PCI hardware characteristics (bit0 => mechanism1, bit1 => mechanism2)
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test al,1
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jnz pci16skip
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test al,2
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jz pci16skip
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mov byte [es:0x9020],2 ; if (al&3)==2 => mechanism 2
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pci16skip:
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mov ax,0x1000
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mov es,ax
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popad
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203
pci32.inc
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203
pci32.inc
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; Error codes
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; eax = -1 : user access to PCI blocked,
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; eax = -2 : an invalid BAR register referred
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; eax = -3 : no i/o space on that BAR
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; eax = -4 : a port i/o BAR register referred
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; eax = -5 : dynamic userspace allocation problem
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;***************************************************************************
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align 4
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pci_mmio_map:
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and edx,0x0ffff
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cmp ah,6
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jc @f
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mov eax,-2
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ret
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@@:
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push ecx
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add ebx, 4095
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and ebx,-4096
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push ebx
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mov bl, ah ; bl = BAR# (0..5)
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shl bl, 1
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shl bl, 1
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add bl, 0x10 ; bl = BARs offset in PCI config. space
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mov ax,word [mmio_pci_addr]
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mov bh, al ; bh = dddddfff
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mov al, 2 ; al : DW to read
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call pci_read_reg
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or eax, eax
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jnz @f
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mov eax,-3 ; empty I/O space
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jmp mmio_ret_fail
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@@:
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test eax, 1
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jz @f
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mov eax,-4 ; damned ports (not MMIO space)
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jmp mmio_ret_fail
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@@:
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pop ecx ; ecx = block size, bytes (expanded to whole page)
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mov ebx, ecx ; user_alloc destroys eax, ecx, edx, but saves ebx
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push eax ; store MMIO physical address + keep 2DWords in the stack
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stdcall user_alloc, ecx
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or eax, eax
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jnz mmio_map_over
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mov eax,-5 ; problem with page allocation
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mmio_ret_fail:
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pop ecx
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pop edx
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ret
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mmio_map_over:
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mov ecx, ebx ; ecx = size (bytes, expanded to whole page)
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shr ecx, 12 ; ecx = number of pages
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mov ebx, eax ; ebx = linear address
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pop eax ; eax = MMIO start
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pop edx ; edx = MMIO shift (pages)
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shl edx, 12 ; edx = MMIO shift (bytes)
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add eax, edx ; eax = uMMIO physical address
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or eax, PG_SHARED
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or eax, PG_UW
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or eax, PG_NOCACHE
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mov edi, ebx
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call commit_pages
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mov eax, edi
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ret
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;***************************************************************************
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; Function
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; pci_mmio_unmap_page ; NEW!
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;
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; Description
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; unmaps the linear space previously tied to a PCI memory block
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;
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; IN: ebx = linear address of space previously allocated by pci_mmio_map
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; returns eax = 1 if successfully unmapped
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;
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; Error codes
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; eax = -1 if no user PCI access allowed,
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; eax = 0 if unmapping failed
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;***************************************************************************
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align 4
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pci_mmio_unmap:
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stdcall user_free, ebx
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ret
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;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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; VendID (2), DevID (2), Revision = 0 (1), Class Code (3), FNum (1), Bus (1)
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pci_emu_dat: times 30*10 db 0
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;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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align 4
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sys_pcibios:
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xchg ebx, eax
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xchg ecx, eax
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xchg edx, eax
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xchg esi, eax
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xchg edi, eax
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cmp [pci_access_enabled], 1
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jne .unsupported_func
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cmp [pci_bios_entry], 0
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jz .emulate_bios
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push ds
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mov ax, pci_data_sel
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mov ds, ax
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mov eax, ebp
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mov ah, 0B1h
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call pword [cs:pci_bios_entry]
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pop ds
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jmp .return
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;-=-=-=-=-=-=-=-=
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.emulate_bios:
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cmp ebp, 1 ; PCI_FUNCTION_ID
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jnz .not_PCI_BIOS_PRESENT
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mov edx, 'PCI '
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mov al, [OS_BASE+0x2F0000 + 0x9020]
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mov bx, [OS_BASE+0x2F0000 + 0x9022]
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mov cl, [OS_BASE+0x2F0000 + 0x9021]
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xor ah, ah
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jmp .return_abcd
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.not_PCI_BIOS_PRESENT:
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cmp ebp, 2 ; FIND_PCI_DEVICE
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jne .not_FIND_PCI_DEVICE
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mov ebx, pci_emu_dat
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..nxt: cmp [ebx], dx
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jne ..no
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cmp [ebx + 2], cx
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jne ..no
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dec si
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jns ..no
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mov bx, [ebx + 4]
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xor ah, ah
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jmp .return_ab
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..no: cmp word[ebx], 0
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je ..dev_not_found
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add ebx, 10
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jmp ..nxt
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..dev_not_found:
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mov ah, 0x86 ; DEVICE_NOT_FOUND
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jmp .return_a
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.not_FIND_PCI_DEVICE:
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cmp ebp, 3 ; FIND_PCI_CLASS_CODE
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jne .not_FIND_PCI_CLASS_CODE
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mov esi, pci_emu_dat
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shl ecx, 8
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..nxt2: cmp [esi], ecx
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jne ..no2
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mov bx, [esi]
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xor ah, ah
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jmp .return_ab
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..no2: cmp dword[esi], 0
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je ..dev_not_found
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add esi, 10
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jmp ..nxt2
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.not_FIND_PCI_CLASS_CODE:
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cmp ebp, 8 ; READ_CONFIG_*
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jb .not_READ_CONFIG
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cmp ebp, 0x0A
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ja .not_READ_CONFIG
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mov eax, ebp
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mov ah, bh
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mov edx, edi
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mov bh, bl
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mov bl, dl
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call pci_read_reg
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mov ecx, eax
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xor ah, ah ; SUCCESSFUL
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jmp .return_abc
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.not_READ_CONFIG:
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cmp ebp, 0x0B ; WRITE_CONFIG_*
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jb .not_WRITE_CONFIG
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cmp ebp, 0x0D
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ja .not_WRITE_CONFIG
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lea eax, [ebp+1]
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mov ah, bh
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mov edx, edi
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mov bh, bl
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mov bl, dl
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call pci_write_reg
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xor ah, ah ; SUCCESSFUL
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jmp .return_abc
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.not_WRITE_CONFIG:
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.unsupported_func:
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mov ah, 0x81 ; FUNC_NOT_SUPPORTED
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.return:mov dword[esp + 8 ], edi
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mov dword[esp + 12], esi
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.return_abcd:
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mov dword[esp + 28], edx
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.return_abc:
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mov dword[esp + 32], ecx
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.return_ab:
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mov dword[esp + 24], ebx
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.return_a:
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mov dword[esp + 36], eax
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ret
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