/*
* @implemented
*/
VOID
NTAPI
HalStopProfileInterrupt(IN KPROFILE_SOURCE ProfileSource)
{
UCHAR StatusB;
/* Acquire the CMOS lock */
HalpAcquireCmosSpinLock();
/* Read Status Register B */
StatusB = HalpReadCmos(RTC_REGISTER_B);
/* Disable periodic interrupts */
StatusB = StatusB & ~RTC_REG_B_PI;
/* Write new value into Status Register B */
HalpWriteCmos(RTC_REGISTER_B, StatusB);
/* Release the CMOS lock */
HalpReleaseCmosSpinLock();
}
VOID
HalpReboot (
VOID
)
/*++
Routine Description:
This procedure resets the CMOS clock to the standard timer settings
so the bios will work, and then issues a reset command to the keyboard
to cause a warm boot.
It is very machine dependent, this implementation is intended for
PC-AT like machines.
This code copied from the "old debugger" sources.
N.B.
Will NOT return.
--*/
{
UCHAR Scratch;
PUSHORT Magic;
//
// By sticking 0x1234 at physical location 0x472, we can bypass the
// memory check after a reboot.
//
Magic = HalpMapPhysicalMemory(0, 1);
Magic[0x472 / sizeof(USHORT)] = 0x1234;
//
// Turn off interrupts
//
HalpAcquireCmosSpinLock();
_asm {
cli
}
//
// Reset the cmos clock to a standard value
// (We are setting the periodic interrupt control on the MC147818)
//
//
// Disable periodic interrupt
//
WRITE_PORT_UCHAR(CMOS_CTRL, 0x0b); // Set up for control reg B.
KeStallExecutionProcessor(1);
Scratch = READ_PORT_UCHAR(CMOS_DATA);
KeStallExecutionProcessor(1);
Scratch &= 0xbf; // Clear periodic interrupt enable
WRITE_PORT_UCHAR(CMOS_DATA, Scratch);
KeStallExecutionProcessor(1);
//
// Set "standard" divider rate
//
WRITE_PORT_UCHAR(CMOS_CTRL, 0x0a); // Set up for control reg A.
KeStallExecutionProcessor(1);
Scratch = READ_PORT_UCHAR(CMOS_DATA);
KeStallExecutionProcessor(1);
Scratch &= 0xf0; // Clear rate setting
Scratch |= 6; // Set default rate and divider
WRITE_PORT_UCHAR(CMOS_DATA, Scratch);
KeStallExecutionProcessor(1);
//
// Set a "neutral" cmos address to prevent weirdness
// (Why is this needed? Source this was copied from doesn't say)
//
WRITE_PORT_UCHAR(CMOS_CTRL, 0x15);
KeStallExecutionProcessor(1);
//
// for 3450/3550 machines - Set shutdown flag to reset
//
if ((NCRPlatform == NCR3450) || (NCRPlatform == NCR3550)) {
WRITE_PORT_UCHAR(CMOS_CTRL, SHUT_DOWN);
WRITE_PORT_UCHAR(CMOS_DATA, SHUT5);
}
//
// Send the reset command to the keyboard controller
//
WRITE_PORT_UCHAR(KEYBPORT, RESETCMD);
_asm {
hlt
}
}
