You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
182 lines
4.2 KiB
182 lines
4.2 KiB
/*
|
|
*
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
*
|
|
* NEC.C - NEC C98Bus Bridge chipset routines.
|
|
*
|
|
*/
|
|
|
|
#include "local.h"
|
|
|
|
#ifdef ALLOC_PRAGMA
|
|
|
|
#pragma alloc_text(INIT, NECValidateTable)
|
|
|
|
#endif //ALLOC_PRAGMA
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NECSetIRQ - Set a Triton PCI link to a specific IRQ
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: bIRQNumber is the new IRQ to be used.
|
|
*
|
|
* bLink is the Link to be set.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NECSetIRQ(UCHAR bIRQNumber, UCHAR bLink)
|
|
{
|
|
//
|
|
// Validate link number.
|
|
//
|
|
if (bLink < 0x60) {
|
|
|
|
return(PCIMP_INVALID_LINK);
|
|
}
|
|
|
|
//
|
|
// Use 0x80 to disable.
|
|
//
|
|
if (!bIRQNumber)
|
|
bIRQNumber=0x80;
|
|
|
|
//
|
|
// Set the Triton IRQ register.
|
|
//
|
|
WriteConfigUchar(bBusPIC, bDevFuncPIC, bLink, bIRQNumber);
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NECGetIRQ - Get the IRQ of a Triton PCI link
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: pbIRQNumber is the buffer to fill.
|
|
*
|
|
* bLink is the Link to be read.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NECGetIRQ(PUCHAR pbIRQNumber, UCHAR bLink)
|
|
{
|
|
//
|
|
// Validate link number.
|
|
//
|
|
if (bLink < 0x60) {
|
|
|
|
return(PCIMP_INVALID_LINK);
|
|
}
|
|
|
|
//
|
|
// Store the IRQ value.
|
|
//
|
|
*pbIRQNumber=ReadConfigUchar(bBusPIC, bDevFuncPIC, bLink);
|
|
|
|
//
|
|
// Return 0 if disabled.
|
|
//
|
|
if (*pbIRQNumber & 0x80)
|
|
*pbIRQNumber=0;
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NECSetTrigger - Set the IRQ triggering values for an Intel system.
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: ulTrigger has bits set for Level triggered IRQs.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NECSetTrigger(ULONG ulTrigger)
|
|
{
|
|
// PC-9800 can not handle IRQ trigger.
|
|
// we have nothing to do.
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NECGetTrigger - Get the IRQ triggering values for an Intel system.
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: pulTrigger will have bits set for Level triggered IRQs.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NECGetTrigger(PULONG pulTrigger)
|
|
{
|
|
// PC-9800 can not handle IRQ trigger.
|
|
// We fake IRQ triggering value so that PCI.VXD works fine.
|
|
|
|
*pulTrigger = 0xffff;
|
|
return(PCIMP_SUCCESS);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* NECValidateTable - Validate an IRQ table
|
|
*
|
|
* Exported.
|
|
*
|
|
* ENTRY: piihIRQInfoHeader points to an IRQInfoHeader followed
|
|
* by an IRQ Routing Table.
|
|
*
|
|
* ulFlags are PCIMP_VALIDATE flags.
|
|
*
|
|
* EXIT: Standard PCIMP return value.
|
|
*
|
|
***************************************************************************/
|
|
PCIMPRET CDECL
|
|
NECValidateTable(PIRQINFOHEADER piihIRQInfoHeader, ULONG ulFlags)
|
|
{
|
|
PAGED_CODE();
|
|
|
|
if ((ulFlags & PCIMP_VALIDATE_SOURCE_BITS)==PCIMP_VALIDATE_SOURCE_PCIBIOS) {
|
|
|
|
//
|
|
// If all links are above 60, we they are config space.
|
|
//
|
|
if (GetMinLink(piihIRQInfoHeader)>=0x60)
|
|
return(PCIMP_SUCCESS);
|
|
|
|
//
|
|
// If there are links above 4, we are clueless.
|
|
//
|
|
if (GetMaxLink(piihIRQInfoHeader)>0x04)
|
|
return(PCIMP_FAILURE);
|
|
|
|
//
|
|
// Assume 1,2,3,4 are the 60,61,62,63 links.
|
|
//
|
|
NormalizeLinks(piihIRQInfoHeader, 0x5F);
|
|
|
|
} else {
|
|
|
|
//
|
|
// Validate that all config space addresses are above 60.
|
|
//
|
|
if (GetMinLink(piihIRQInfoHeader)<0x60)
|
|
return(PCIMP_FAILURE);
|
|
}
|
|
|
|
return(PCIMP_SUCCESS);
|
|
}
|