processor.c

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/*
 * PROJECT:         ReactOS HAL
 * LICENSE:         BSD - See COPYING.ARM in the top level directory
 * FILE:            hal/halarm/generic/processor.c
 * PURPOSE:         HAL Processor Routines
 * PROGRAMMERS:     ReactOS Portable Systems Group
 */

/* INCLUDES *******************************************************************/

#include <hal.h>
#define NDEBUG
#include <debug.h>

/* GLOBALS ********************************************************************/

LONG HalpActiveProcessors;
KAFFINITY HalpDefaultInterruptAffinity;
BOOLEAN HalpProcessorIdentified;
BOOLEAN HalpTestCleanSupported;

/* PRIVATE FUNCTIONS **********************************************************/

VOID
HalpIdentifyProcessor(VOID)
{
    ARM_ID_CODE_REGISTER IdRegister;

    /* Don't do it again */
    HalpProcessorIdentified = TRUE;
    
    // fixfix: Use Pcr->ProcessorId
    
    /* Read the ID Code */
    IdRegister = KeArmIdCodeRegisterGet();
    
    /* Architecture "6" CPUs support test-and-clean (926EJ-S and 1026EJ-S) */
    HalpTestCleanSupported = (IdRegister.Architecture == 6);
}

/* FUNCTIONS ******************************************************************/

/*
 * @implemented
 */
VOID
NTAPI
HalInitializeProcessor(IN ULONG ProcessorNumber,
                       IN PLOADER_PARAMETER_BLOCK LoaderBlock)
{
    /* Do nothing */
    return;
}

/*
 * @implemented
 */
BOOLEAN
NTAPI
HalAllProcessorsStarted(VOID)
{
    /* Do nothing */
    return TRUE;
}

/*
 * @implemented
 */
BOOLEAN
NTAPI
HalStartNextProcessor(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
                      IN PKPROCESSOR_STATE ProcessorState)
{
    /* Ready to start */
    return FALSE;
}

/*
 * @implemented
 */
VOID
NTAPI
HalProcessorIdle(VOID)
{
    /* Enable interrupts and halt the processor */
    _enable();
    UNIMPLEMENTED;
    while (TRUE);
}

/*
 * @implemented
 */
VOID
NTAPI
HalRequestIpi(KAFFINITY TargetProcessors)
{
    /* Not implemented on UP */
    UNIMPLEMENTED;
    while (TRUE);
}

/*
 * @implemented
 */
VOID
HalSweepDcache(VOID)
{
    /*
     * We get called very early on, before HalInitSystem or any of the Hal*
     * processor routines, so we need to figure out what CPU we're on.
     */
    if (!HalpProcessorIdentified) HalpIdentifyProcessor();
    
    /*
     * Check if we can do it the ARMv5TE-J way
     */
    if (HalpTestCleanSupported)
    {
        /* Test, clean, flush D-Cache */
        __asm__ __volatile__ ("1: mrc p15, 0, pc, c7, c14, 3; bne 1b");
    }
    else
    {
        /* We need to do it it by set/way. For now always call ARMv7 function */
        //extern VOID v7_flush_dcache_all(VOID);
        //v7_flush_dcache_all();
    }
}

/*
 * @implemented
 */
VOID
HalSweepIcache(VOID)
{
    /* All ARM cores support the same Icache flush command */
    KeArmFlushIcache();
}

/* EOF */