_pcihelp.asm
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;****************************************************************************
;*
;* SciTech OS Portability Manager Library
;*
;* ========================================================================
;*
;* Copyright (C) 1991-2002 SciTech Software, Inc. All rights reserved.
;*
;* This file may be distributed and/or modified under the terms of the
;* GNU Lesser General Public License version 2.1 as published by the Free
;* Software Foundation and appearing in the file LICENSE.LGPL included
;* in the packaging of this file.
;*
;* Licensees holding a valid Commercial License for this product from
;* SciTech Software, Inc. may use this file in accordance with the
;* Commercial License Agreement provided with the Software.
;*
;* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
;* THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;* PURPOSE.
;*
;* See http://www.scitechsoft.com/license/ for information about
;* the licensing options available and how to purchase a Commercial
;* License Agreement.
;*
;* Contact license@scitechsoft.com if any conditions of this licensing
;* are not clear to you, or you have questions about licensing options.
;*
;* ========================================================================
;*
;* Language: NASM
;* Environment: Any
;*
;* Description: Helper assembler functions for PCI access module.
;*
;****************************************************************************
include "scitech.mac" ; Memory model macros
header _pcilib
begcodeseg _pcilib
ifdef flatmodel
;----------------------------------------------------------------------------
; uchar _ASMAPI _BIOS32_service(
; ulong service,
; ulong func,
; ulong *physBase,
; ulong *length,
; ulong *serviceOffset,
; PCIBIOS_entry entry);
;----------------------------------------------------------------------------
; Call the BIOS32 services directory
;----------------------------------------------------------------------------
cprocstart _BIOS32_service
ARG service:ULONG, func:ULONG, physBase:DPTR, len:DPTR, off:DPTR, entry:QWORD
enter_c
mov eax,[service]
mov ebx,[func]
call far dword [entry]
mov esi,[physBase]
mov [esi],ebx
mov esi,[len]
mov [esi],ecx
mov esi,[off]
mov [esi],edx
leave_c
ret
cprocend
endif
;----------------------------------------------------------------------------
; ushort _ASMAPI _PCIBIOS_isPresent(ulong i_eax,ulong *o_edx,ushort *oeax,
; uchar *o_cl,PCIBIOS_entry entry)
;----------------------------------------------------------------------------
; Call the PCI BIOS to determine if it is present.
;----------------------------------------------------------------------------
cprocstart _PCIBIOS_isPresent
ARG i_eax:ULONG, o_edx:DPTR, oeax:DPTR, o_cl:DPTR, entry:QWORD
enter_c
mov eax,[i_eax]
ifdef flatmodel
call far dword [entry]
else
int 1Ah
endif
_les _si,[o_edx]
mov [_ES _si],edx
_les _si,[oeax]
mov [_ES _si],ax
_les _si,[o_cl]
mov [_ES _si],cl
mov ax,bx
leave_c
ret
cprocend
;----------------------------------------------------------------------------
; ulong _PCIBIOS_service(ulong r_eax,ulong r_ebx,ulong r_edi,ulong r_ecx,
; PCIBIOS_entry entry)
;----------------------------------------------------------------------------
; Call the PCI BIOS services, either via the 32-bit protected mode entry
; point or via the Int 1Ah 16-bit interrupt.
;----------------------------------------------------------------------------
cprocstart _PCIBIOS_service
ARG r_eax:ULONG, r_ebx:ULONG, r_edi:ULONG, r_ecx:ULONG, entry:QWORD
enter_c
mov eax,[r_eax]
mov ebx,[r_ebx]
mov edi,[r_edi]
mov ecx,[r_ecx]
ifdef flatmodel
call far dword [entry]
else
int 1Ah
endif
mov eax,ecx
ifndef flatmodel
shld edx,eax,16 ; Return result in DX:AX
endif
leave_c
ret
cprocend
;----------------------------------------------------------------------------
; int _PCIBIOS_getRouting(PCIRoutingOptionsBuffer *buf,PCIBIOS_entry entry);
;----------------------------------------------------------------------------
; Get the routing options for PCI devices
;----------------------------------------------------------------------------
cprocstart _PCIBIOS_getRouting
ARG buf:DPTR, entry:QWORD
enter_c
mov eax,0B10Eh
mov bx,0
_les _di,[buf]
ifdef flatmodel
call far dword [entry]
else
int 1Ah
endif
movzx eax,ah
leave_c
ret
cprocend
;----------------------------------------------------------------------------
; ibool _PCIBIOS_setIRQ(int busDev,int intPin,int IRQ,PCIBIOS_entry entry);
;----------------------------------------------------------------------------
; Change the IRQ routing for the PCI device
;----------------------------------------------------------------------------
cprocstart _PCIBIOS_setIRQ
ARG busDev:UINT, intPin:UINT, IRQ:UINT, entry:QWORD
enter_c
mov eax,0B10Fh
mov bx,[USHORT busDev]
mov cl,[BYTE intPin]
mov ch,[BYTE IRQ]
ifdef flatmodel
call far dword [entry]
else
int 1Ah
endif
mov eax,1
jnc @@1
xor eax,eax ; Function failed!
@@1: leave_c
ret
cprocend
;----------------------------------------------------------------------------
; ulong _PCIBIOS_specialCycle(int bus,ulong data,PCIBIOS_entry entry);
;----------------------------------------------------------------------------
; Generate a special cycle via the PCI BIOS.
;----------------------------------------------------------------------------
cprocstart _PCIBIOS_specialCycle
ARG bus:UINT, data:ULONG, entry:QWORD
enter_c
mov eax,0B106h
mov bh,[BYTE bus]
mov ecx,[data]
ifdef flatmodel
call far dword [entry]
else
int 1Ah
endif
leave_c
ret
cprocend
;----------------------------------------------------------------------------
; ushort _PCI_getCS(void)
;----------------------------------------------------------------------------
cprocstart _PCI_getCS
mov ax,cs
ret
cprocend
;----------------------------------------------------------------------------
; int PM_inpb(int port)
;----------------------------------------------------------------------------
; Reads a byte from the specified port
;----------------------------------------------------------------------------
cprocstart PM_inpb
ARG port:UINT
push _bp
mov _bp,_sp
xor _ax,_ax
mov _dx,[port]
in al,dx
pop _bp
ret
cprocend
;----------------------------------------------------------------------------
; int PM_inpw(int port)
;----------------------------------------------------------------------------
; Reads a word from the specified port
;----------------------------------------------------------------------------
cprocstart PM_inpw
ARG port:UINT
push _bp
mov _bp,_sp
xor _ax,_ax
mov _dx,[port]
in ax,dx
pop _bp
ret
cprocend
;----------------------------------------------------------------------------
; ulong PM_inpd(int port)
;----------------------------------------------------------------------------
; Reads a word from the specified port
;----------------------------------------------------------------------------
cprocstart PM_inpd
ARG port:UINT
push _bp
mov _bp,_sp
mov _dx,[port]
in eax,dx
ifndef flatmodel
shld edx,eax,16 ; DX:AX = result
endif
pop _bp
ret
cprocend
;----------------------------------------------------------------------------
; void PM_outpb(int port,int value)
;----------------------------------------------------------------------------
; Write a byte to the specified port.
;----------------------------------------------------------------------------
cprocstart PM_outpb
ARG port:UINT, value:UINT
push _bp
mov _bp,_sp
mov _dx,[port]
mov _ax,[value]
out dx,al
pop _bp
ret
cprocend
;----------------------------------------------------------------------------
; void PM_outpw(int port,int value)
;----------------------------------------------------------------------------
; Write a word to the specified port.
;----------------------------------------------------------------------------
cprocstart PM_outpw
ARG port:UINT, value:UINT
push _bp
mov _bp,_sp
mov _dx,[port]
mov _ax,[value]
out dx,ax
pop _bp
ret
cprocend
;----------------------------------------------------------------------------
; void PM_outpd(int port,ulong value)
;----------------------------------------------------------------------------
; Write a word to the specified port.
;----------------------------------------------------------------------------
cprocstart PM_outpd
ARG port:UINT, value:ULONG
push _bp
mov _bp,_sp
mov _dx,[port]
mov eax,[value]
out dx,eax
pop _bp
ret
cprocend
endcodeseg _pcilib
END