reboot.c File Reference

#include "halxbox.h"

Include dependency graph for reboot.c:

Go to the source code of this file.

Functions
static VOID	SMBusWriteByte (_In_ UCHAR Address, _In_ UCHAR Register, _In_ UCHAR Data)
static DECLSPEC_NORETURN VOID	HalpXboxPowerAction (_In_ UCHAR Action)
DECLSPEC_NORETURN VOID	HalpReboot (VOID)
VOID NTAPI	HalReturnToFirmware (_In_ FIRMWARE_REENTRY Action)

Function Documentation

HalpReboot()

DECLSPEC_NORETURN VOID HalpReboot

(

VOID

)

Definition at line 83 of file reboot.c.

{
    HalpXboxPowerAction(SMC_REG_POWER_RESET);
}

HalpXboxPowerAction()

static DECLSPEC_NORETURN VOID HalpXboxPowerAction ( _In_ UCHAR  Action )

static

Definition at line 67 of file reboot.c.

{
    /* Disable interrupts */
    _disable();
 
    /* Send the command */
    SMBusWriteByte(SMB_DEVICE_SMC_PIC16LC, SMC_REG_POWER, Action);
 
    /* Halt the CPU */
    __halt();
    UNREACHABLE;
}

Referenced by HalpReboot(), and HalReturnToFirmware().

HalReturnToFirmware()

VOID NTAPI HalReturnToFirmware

(

_In_ FIRMWARE_REENTRY

Action

)

Definition at line 96 of file reboot.c.

{
    /* Check what kind of action this is */
    switch (Action)
    {
        /* All recognized actions: call the internal power function */
        case HalHaltRoutine:
        case HalPowerDownRoutine:
        {
            HalpXboxPowerAction(SMC_REG_POWER_SHUTDOWN);
        }
        case HalRestartRoutine:
        {
            HalpXboxPowerAction(SMC_REG_POWER_CYCLE);
        }
        case HalRebootRoutine:
        {
            HalpXboxPowerAction(SMC_REG_POWER_RESET);
        }
 
        /* Anything else */
        default:
        {
            /* Print message and break */
            DbgPrint("HalReturnToFirmware(%d) called!\n", Action);
            DbgBreakPoint();
        }
    }
}

SMBusWriteByte()

static VOID SMBusWriteByte ( _In_ UCHAR  Address, _In_ UCHAR  Register, _In_ UCHAR  Data  )

static

Definition at line 21 of file reboot.c.

{
    INT Retries = 50;
 
    /* Wait while bus is busy with any master traffic */
    while (READ_PORT_USHORT((PUSHORT)SMB_GLOBAL_STATUS) & 0x800)
    {
        NOTHING;
    }
 
    while (Retries--)
    {
        UCHAR b;
 
        WRITE_PORT_UCHAR((PUCHAR)SMB_HOST_ADDRESS, Address << 1);
        WRITE_PORT_UCHAR((PUCHAR)SMB_HOST_COMMAND, Register);
 
        WRITE_PORT_UCHAR((PUCHAR)SMB_HOST_DATA, Data);
 
        /* Clear down all preexisting errors */
        WRITE_PORT_USHORT((PUSHORT)SMB_GLOBAL_STATUS, READ_PORT_USHORT((PUSHORT)SMB_GLOBAL_STATUS));
 
        /* Let I2C SMBus know we're sending a single byte here */
        WRITE_PORT_UCHAR((PUCHAR)SMB_GLOBAL_ENABLE, 0x1A);
 
        b = 0;
 
        while (!(b & 0x36))
        {
            b = READ_PORT_UCHAR((PUCHAR)SMB_GLOBAL_STATUS);
        }
 
        if (b & 0x10)
        {
            return;
        }
 
        KeStallExecutionProcessor(1);
    }
}

Referenced by HalpXboxPowerAction().