windows-xp/Source/XPSP1/NT/base/hals/halia64/ia64/xxhal.c

/*++

Copyright (c) 1989-2000  Microsoft Corporation

Component Name:

    HALIA64

Module Name:

    xxhal.c

Abstract:

    This module determines the HAL IA64 common features based on processor 
    and platform types. This exposes the processor and system features 
    that the HAL would use to enable / disable its own features.
    By the mean of HAL exported interfaces or exported global variables, 
    the HAL exposes its supported features.

Author:

    David N. Cutler (davec) 5-Mar-1989

Environment:

    ToBeSpecified

Revision History:

    3/23/2000 Thierry Fevrier (v-thief@microsoft.com):

         Initial version

--*/

#include "halp.h"

extern ULONG HalpMaxCPEImplemented;

#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT,HalpGetFeatureBits)
#endif

ULONG
HalpGetFeatureBits (
    VOID
    )
{
    ULONG   bits = HALP_FEATURE_INIT;
    PKPRCB  prcb = KeGetCurrentPrcb();

    //
    // Determine Processor type and System type.
    //
    // For the processor, this could come from:
    //  - PAL_BUS_GET_FEATURES
    //  - PAL_DEBUG_INFO        ??
    //  - PAL_FREQ_BASE
    //  - PAL_FREQ_RATIOS
    //  - PAL_PERF_MON_INFO
    //  - PAL_PROC_GET_FEATURES
    //  - PAL_REGISTER_INFO
    //  - PAL_VERSION
    //

    // NOT-YET...

    //
    // Determine Processor features:
    // like support for Processor Hardware Performance Monitor Events and
    // - HAL_NO_SPECULATION
    // - HAL_MCA_PRESENT      
    
    // NOT-YET - should call PAL PERF_MON call.
    bits |= HAL_PERF_EVENTS;

    //
    // Determine Platform features:
    // like support for Platform Performance Monitor Events...
    //

    // NOT-YET - should call SAL calls.

    //
    // Default software HAL support for IA64 Errors (MCA, CMC, CPE).
    //
    // However, we already know if we found an ACPI platform interrupt entry which identifier
    // is PLATFORM_INT_CPE.
    //

    bits |= HAL_MCA_PRESENT;
    if ( HalpCmcInfo.Stats.MaxLogSize )   {
        if ( HalpCmcInfo.Stats.MaxLogSize >= sizeof( ERROR_RECORD_HEADER )) {
            bits |= HAL_CMC_PRESENT;
        }
        else if ( prcb->Number == 0 )    {
            HalDebugPrint(( HAL_ERROR, 
                            "HAL!HalpGetFeatureBits: Invalid max CMC log size from SAL\n" ));
        }
    }

    //
    // Thierry 03/11/2001: WARNING WARNING
    // For the final release, the following HalpMaxCPEImplemented should be eliminated.
    // However the current FWs MCE situation is rather pathetic:
    //   **** Do not allow the setting of HAL_CPE_PRESENT if HalpMaxCPEImplemented == 0 ****
    //
    // [good] reasons:
    //  - We bugcheck with the current BigSur SAL/FW (<= build 99) at SAL_GET_STATE_INFO calls,
    //    the FW assuming that we are calling the SAL MC related functions in physical mode.
    //  - With the Lion SAL/FW (<= build 75), we bugcheck after getting MCA logs at boot time,
    //    the FW having some virtualization issues.
    // Intel is committed to provide working FWs soon (< 2 weeks...).
    //

    if ( HalpMaxCPEImplemented && HalpCpeInfo.Stats.MaxLogSize )   {
        if ( HalpCpeInfo.Stats.MaxLogSize >= sizeof( ERROR_RECORD_HEADER ) ) {
            bits |= HAL_CPE_PRESENT;
        }
        else if ( prcb->Number == 0 )    {
           HalDebugPrint(( HAL_ERROR, 
                           "HAL!HalpGetFeatureBits: Invalid max CPE log size from SAL\n" ));
        }
    }

    return bits;

} // HalpGetFeatureBits()