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231 lines
5.1 KiB
231 lines
5.1 KiB
/*
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* TOSHIBA.C - Toshiba Tecra IRQ routing spec
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*
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* Notes:
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* Algorithms from TECS-1010-1001
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*
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*/
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#include "local.h"
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BOOLEAN CDECL
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CallSMI(
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IN ULONG rAX,
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IN ULONG rBX,
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IN ULONG rCX,
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IN PULONG prCX
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);
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#ifdef ALLOC_DATA_PRAGMA
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#pragma data_seg()
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#pragma const_seg()
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#endif
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GLOBAL_DATA ULONG SMIPort=0xB2;
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(INIT, ToshibaValidateTable)
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#endif //ALLOC_PRAGMA
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/****************************************************************************
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*
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* CallSMI - Get into SMI
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*
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* Not exported.
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*
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* ENTRY: rAX is the value for AX as input.
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*
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* rBX is the value for BX as input.
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*
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* rCX is the value for CX as input.
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*
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* prCX is filled with the returned CX, if not NULL.
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*
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* EXIT: TRUE iff no error.
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*
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***************************************************************************/
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BOOLEAN CDECL
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CallSMI(ULONG rAX, ULONG rBX, ULONG rCX, PULONG prCX)
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{
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ULONG ulAX, ulCX;
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_asm mov eax, rAX
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_asm mov ebx, rBX
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_asm mov ecx, rCX
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_asm mov edx, SMIPort
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_asm in al, dx
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_asm movzx ecx, cx
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_asm mov ulCX, ecx
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_asm movzx eax, ah
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_asm mov ulAX, eax
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if (prCX)
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*prCX=ulCX;
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return(ulAX==0);
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}
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/****************************************************************************
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*
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* ToshibaSetIRQ - Set a Toshiba PCI link to a specific IRQ
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*
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* Exported.
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*
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* ENTRY: bIRQNumber is the new IRQ to be used.
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*
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* bLink is the Link to be set.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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ToshibaSetIRQ(UCHAR bIRQNumber, UCHAR bLink)
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{
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//
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// Use 0xFF to disable.
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//
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if (!bIRQNumber)
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bIRQNumber=0xFF;
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//
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// Ask SMI to set the link.
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//
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return(CallSMI( 0xFF44,
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0x0701,
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(bLink<<8)+bIRQNumber,
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NULL) ?
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PCIMP_SUCCESS :
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PCIMP_FAILURE);
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}
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/****************************************************************************
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*
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* ToshibaGetIRQ - Get the IRQ of a Toshiba PCI link
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*
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* Exported.
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*
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* ENTRY: pbIRQNumber is the buffer to fill.
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*
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* bLink is the Link to be read.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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ToshibaGetIRQ(PUCHAR pbIRQNumber, UCHAR bLink)
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{
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ULONG ulCX;
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//
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// Ask SMI to get the link.
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//
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if (!CallSMI( 0xFE44,
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0x0701,
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bLink<<8,
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&ulCX))
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return(PCIMP_FAILURE);
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//
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// Get the byte only.
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//
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ulCX&=0xFF;
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//
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// Use 0xFF to disable.
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//
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if (ulCX==0xFF)
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ulCX=0;
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//
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// Store the IRQ value.
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//
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*pbIRQNumber=(UCHAR)ulCX;
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return(PCIMP_SUCCESS);
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}
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/****************************************************************************
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*
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* ToshibaSetTrigger - Set the IRQ triggering values for the Toshiba
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*
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* Exported.
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*
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* ENTRY: ulTrigger has bits set for Level triggered IRQs.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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ToshibaSetTrigger(ULONG ulTrigger)
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{
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//
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// Ask SMI to set the triggering mechanism.
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//
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return(CallSMI( 0xFF44,
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0x0702,
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ulTrigger,
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NULL) ?
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PCIMP_SUCCESS :
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PCIMP_FAILURE);
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}
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/****************************************************************************
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*
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* ToshibaGetTrigger - Get the IRQ triggering values for the Toshiba
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*
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* Exported.
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*
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* ENTRY: pulTrigger will have bits set for Level triggered IRQs.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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ToshibaGetTrigger(PULONG pulTrigger)
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{
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//
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// Assume all edge.
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//
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*pulTrigger = 0;
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//
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// Ask SMI to get the triggering mechanism.
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//
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return(CallSMI( 0xFE44,
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0x0702,
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0,
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pulTrigger) ?
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PCIMP_SUCCESS :
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PCIMP_FAILURE);
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}
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/****************************************************************************
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*
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* ToshibaValidateTable - Validate an IRQ table
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*
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* Exported.
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*
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* ENTRY: piihIRQInfoHeader points to an IRQInfoHeader followed
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* by an IRQ Routing Table.
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*
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* ulFlags are PCIMP_VALIDATE flags.
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*
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* EXIT: Standard PCIMP return value.
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*
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***************************************************************************/
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PCIMPRET CDECL
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ToshibaValidateTable(PIRQINFOHEADER piihIRQInfoHeader, ULONG ulFlags)
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{
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PAGED_CODE();
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SMIPort=*(((PUSHORT)&(piihIRQInfoHeader->MiniportData))+1);
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return(((ulFlags & PCIMP_VALIDATE_SOURCE_BITS)==PCIMP_VALIDATE_SOURCE_PCIBIOS) ?
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PCIMP_FAILURE : PCIMP_SUCCESS);
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}
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