160 lines
2.5 KiB
C
160 lines
2.5 KiB
C
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 1990 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
bdreboot.c
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
System reboot function. Currently part of the debugger because
|
||
|
|
that's the only place it's used.
|
||
|
|
|
||
|
|
Author:
|
||
|
|
|
||
|
|
Bryan M. Willman (bryanwi) 4-Dec-90
|
||
|
|
|
||
|
|
Revision History:
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#include "bd.h"
|
||
|
|
|
||
|
|
VOID
|
||
|
|
FwStallExecution(
|
||
|
|
IN ULONG Microseconds
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
#define CMOS_CTRL (PUCHAR )0x70
|
||
|
|
#define CMOS_DATA (PUCHAR )0x71
|
||
|
|
|
||
|
|
#define RESET 0xfe
|
||
|
|
#define KEYBPORT (PUCHAR )0x64
|
||
|
|
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Turn off interrupts
|
||
|
|
//
|
||
|
|
|
||
|
|
_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.
|
||
|
|
FwStallExecution(1);
|
||
|
|
|
||
|
|
Scratch = READ_PORT_UCHAR(CMOS_DATA);
|
||
|
|
FwStallExecution(1);
|
||
|
|
|
||
|
|
Scratch &= 0xbf; // Clear periodic interrupt enable
|
||
|
|
|
||
|
|
WRITE_PORT_UCHAR(CMOS_DATA, Scratch);
|
||
|
|
FwStallExecution(1);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set "standard" divider rate
|
||
|
|
//
|
||
|
|
|
||
|
|
WRITE_PORT_UCHAR(CMOS_CTRL, 0x0a); // Set up for control reg A.
|
||
|
|
FwStallExecution(1);
|
||
|
|
|
||
|
|
Scratch = READ_PORT_UCHAR(CMOS_DATA);
|
||
|
|
FwStallExecution(1);
|
||
|
|
|
||
|
|
Scratch &= 0xf0; // Clear rate setting
|
||
|
|
Scratch |= 6; // Set default rate and divider
|
||
|
|
|
||
|
|
WRITE_PORT_UCHAR(CMOS_DATA, Scratch);
|
||
|
|
FwStallExecution(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);
|
||
|
|
FwStallExecution(1);
|
||
|
|
|
||
|
|
//
|
||
|
|
// If we return, send the reset command to the keyboard controller
|
||
|
|
//
|
||
|
|
|
||
|
|
WRITE_PORT_UCHAR(KEYBPORT, RESET);
|
||
|
|
|
||
|
|
_asm {
|
||
|
|
hlt
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
VOID
|
||
|
|
BdReboot (
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
Just calls the HalReturnToFirmware function.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
None
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
Does not return
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Never returns from HAL
|
||
|
|
//
|
||
|
|
|
||
|
|
HalpReboot();
|
||
|
|
|
||
|
|
while (TRUE) {
|
||
|
|
}
|
||
|
|
}
|