profil.c

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/*
 * PROJECT:     NEC PC-98 series HAL
 * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
 * PURPOSE:     System Profiling
 * COPYRIGHT:   Copyright 2020 Dmitry Borisov (di.sean@protonmail.com)
 */
 
/* INCLUDES ******************************************************************/
 
#include <hal.h>
 
#define NDEBUG
#include <debug.h>
 
/* GLOBALS *******************************************************************/
 
BOOLEAN HalpProfilingStopped = TRUE;
UCHAR HalpProfileRate = 3;
 
/* FUNCTIONS *****************************************************************/
 
VOID
NTAPI
HalStopProfileInterrupt(
    _In_ KPROFILE_SOURCE ProfileSource)
{
    UNREFERENCED_PARAMETER(ProfileSource);
 
    HalpAcquireCmosSpinLock();
 
    /* Clear the interrupt flag */
    (VOID)__inbyte(RTC_IO_i_INTERRUPT_RESET);
 
    HalpProfilingStopped = TRUE;
 
    HalpReleaseCmosSpinLock();
}
 
VOID
NTAPI
HalStartProfileInterrupt(
    _In_ KPROFILE_SOURCE ProfileSource)
{
    UNREFERENCED_PARAMETER(ProfileSource);
 
    HalpProfilingStopped = FALSE;
 
    HalpAcquireCmosSpinLock();
 
    /* Configure the clock divisor for generating periodic interrupts */
    __outbyte(RTC_IO_o_INT_CLOCK_DIVISOR, HalpProfileRate | 0x80);
 
    HalpReleaseCmosSpinLock();
}
 
ULONG_PTR
NTAPI
HalSetProfileInterval(
    _In_ ULONG_PTR Interval)
{
    /*
     * FIXME:
     * 1) What is the maximum and minimum interrupt frequency for the RTC?
     * 2) Find the maximum possible clock divisor value.
     */
    UNIMPLEMENTED;
 
    /* Update interval */
    if (!HalpProfilingStopped)
       HalStartProfileInterrupt(0);
 
    /* For now... */
    return Interval;
}