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/*++
Copyright (c) 1991 Microsoft Corporation
Copyright (c) 1994 MOTOROLA, INC. All Rights Reserved. This file
contains copyrighted material. Use of this file is restricted
by the provisions of a Motorola Software License Agreement.
Copyright (c) 1996 International Business Machines Corporation
Module Name:
pxreturn.c
Abstract:
This module implements the HAL return to firmware function.
Author:
David N. Cutler (davec) 21-Aug-1991
Revision History:
Jim Wooldridge (jimw@austin.vnet.ibm.com) Initial Power PC port
Keyboard mapping code was ported to PPC.
This function is currently a stub since our firmware is big endian
--*/
#include "halp.h"
#include "pci.h"
#include "pcip.h"
#include "eisa.h"
#if defined(VICTORY)
#include "ibmppc.h"
#endif
//
// Define keyboard registers structure.
//
typedef struct _KBD_REGISTERS {
union {
UCHAR Output;
UCHAR Input;
} Data;
union {
UCHAR Status;
UCHAR Command;
} Control;
} KBD_REGISTERS;
#define KBD_IBF_MASK 2 // input buffer full mask
#define KBD_DATA_PORT 0x60
#define KBD_COMMAND_PORT 0x64
#define KbdGetStatus() (READ_REGISTER_UCHAR(&HalpIoControlBase + KBD_COMMAND_PORT))
#define KbdStoreCommand(Byte) WRITE_REGISTER_UCHAR(&HalpIoControlBase + KBD_COMMAND_PORT, Byte)
#define KbdStoreData(Byte) WRITE_REGISTER_UCHAR(&HalpIoControlBase + KBD_DATA_PORT, Byte)
#define KbdGetData() (READ_REGISTER_UCHAR(&HalpIoControlBase + KBD_DATA_PORT))
VOID
HalpPowerPcReset(
VOID
);
#if defined(VICTORY)
VOID
HalpResetUnion(
VOID
);
#endif
VOID
HalReturnToFirmware(
IN FIRMWARE_REENTRY Routine
)
/*++
Routine Description:
This function returns control to the specified firmware routine.
In most cases it generates a soft reset by asserting the reset line
trough the keyboard controller.
The Keyboard controller is mapped using the same virtual address
and the same fixed entry as the DMA.
Arguments:
Routine - Supplies a value indicating which firmware routine to invoke.
Return Value:
Does not return.
--*/
{
KIRQL OldIrql;
ULONG i;
PCI_COMMON_CONFIG PciData;
PUCHAR PIC_Address;
UCHAR PIC_Mask=0xFF;
#define ISA_CONTROL ((PEISA_CONTROL) HalpIoControlBase)
HalpUpdateDecrementer(0x7FFFFFFF);
//
// Disable Interrupts.
//
KeRaiseIrql(HIGH_LEVEL, &OldIrql);
//
// Disable interrupt controller:
//
PIC_Address = &(ISA_CONTROL->Interrupt1ControlPort1);
WRITE_REGISTER_UCHAR(PIC_Address, PIC_Mask);
PIC_Address = &(ISA_CONTROL->Interrupt2ControlPort1);
WRITE_REGISTER_UCHAR(PIC_Address, PIC_Mask);
#if defined(SOFT_HDD_LAMP)
//
// Turn off the HDD lamp.
//
*((PUCHAR)HalpIoControlBase + HDD_LAMP_PORT) = 0;
#endif
//
// Case on the type of return.
//
switch (Routine) {
case HalHaltRoutine:
//
// Hang looping.
//
for (;;) {
}
case HalPowerDownRoutine:
case HalRestartRoutine:
case HalRebootRoutine:
case HalInteractiveModeRoutine:
#if defined(VICTORY)
if ( HalpSystemType == IBM_DORAL ) {
//
// Poke the Union "Power On Reset" register.
// (This should never return).
//
HalpResetUnion();
}
#endif
HalpPowerPcReset();
for (;;) {
}
default:
KdPrint(("HalReturnToFirmware invalid argument\n"));
KeLowerIrql(OldIrql);
DbgBreakPoint();
}
}
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