#include <freeldr.h>
#include <hwide.h>
#include <debug.h>

Include dependency graph for xboxdisk.c:

Functions
	DBG_DEFAULT_CHANNEL (DISK)

static VOID	XboxDiskInit (VOID)

static PDEVICE_UNIT	XboxDiskDriveNumberToDeviceUnit (UCHAR DriveNumber)

BOOLEAN	XboxDiskReadLogicalSectors (IN UCHAR DriveNumber, IN ULONGLONG SectorNumber, IN ULONG SectorCount, OUT PVOID Buffer)

BOOLEAN	XboxDiskGetDriveGeometry (UCHAR DriveNumber, PGEOMETRY Geometry)

ULONG	XboxDiskGetCacheableBlockCount (UCHAR DriveNumber)

Variables
static PDEVICE_UNIT	HardDrive = NULL

static PDEVICE_UNIT	CdDrive = NULL

static BOOLEAN	AtaInitialized = FALSE

Function Documentation

◆ DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL ( DISK )

◆ XboxDiskDriveNumberToDeviceUnit()

static PDEVICE_UNIT XboxDiskDriveNumberToDeviceUnit ( UCHAR DriveNumber )

inlinestatic

Definition at line 60 of file xboxdisk.c.

{
    /* Xbox has only 1 IDE controller and no floppy */
    if (DriveNumber < 0x80 || (DriveNumber & 0x0F) >= 2)
        return NULL;
 
    if (!AtaInitialized)
        XboxDiskInit();
 
    /* HDD */
    if ((DriveNumber == 0x80) && HardDrive)
        return HardDrive;
 
    /* CD */
    if (((DriveNumber & 0xF0) > 0x80) && CdDrive)
        return CdDrive;
 
    return NULL;
}

Referenced by XboxDiskGetCacheableBlockCount(), XboxDiskGetDriveGeometry(), and XboxDiskReadLogicalSectors().

◆ XboxDiskGetCacheableBlockCount()

ULONG XboxDiskGetCacheableBlockCount ( UCHAR DriveNumber )

Definition at line 120 of file xboxdisk.c.

{
    PDEVICE_UNIT DeviceUnit;
 
    DeviceUnit = XboxDiskDriveNumberToDeviceUnit(DriveNumber);
    if (!DeviceUnit)
        return 1; // Unknown count.
 
    /*
     * If LBA is supported then the block size will be 64 sectors (32k).
     * If not then the block size is the size of one track.
     */
    if (DeviceUnit->Flags & ATA_DEVICE_LBA)
        return 64;
    else
        return DeviceUnit->SectorsPerTrack;
}

Referenced by MachInit().

◆ XboxDiskGetDriveGeometry()

BOOLEAN XboxDiskGetDriveGeometry	(	UCHAR	DriveNumber,
		PGEOMETRY	Geometry
	)

Definition at line 100 of file xboxdisk.c.

{
    PDEVICE_UNIT DeviceUnit;
 
    TRACE("XboxDiskGetDriveGeometry(0x%x)\n", DriveNumber);
 
    DeviceUnit = XboxDiskDriveNumberToDeviceUnit(DriveNumber);
    if (!DeviceUnit)
        return FALSE;
 
    Geometry->Cylinders = DeviceUnit->Cylinders;
    Geometry->Heads = DeviceUnit->Heads;
    Geometry->SectorsPerTrack = DeviceUnit->SectorsPerTrack;
    Geometry->BytesPerSector = DeviceUnit->SectorSize;
    Geometry->Sectors = DeviceUnit->TotalSectors;
 
    return TRUE;
}

Referenced by MachInit(), and XboxGetHarddiskConfigurationData().

◆ XboxDiskInit()

static VOID XboxDiskInit ( VOID )

static

Definition at line 27 of file xboxdisk.c.

{
    UCHAR DetectedCount;
    UCHAR UnitNumber;
    PDEVICE_UNIT DeviceUnit = NULL;
 
    ASSERT(!AtaInitialized);
 
    AtaInitialized = TRUE;
 
    /* Find first HDD and CD */
    AtaInit(&DetectedCount);
    for (UnitNumber = 0; UnitNumber <= DetectedCount; UnitNumber++)
    {
        DeviceUnit = AtaGetDevice(UnitNumber);
        if (DeviceUnit)
        {
            if (DeviceUnit->Flags & ATA_DEVICE_ATAPI)
            {
                if (!CdDrive)
                    CdDrive = DeviceUnit;
            }
            else
            {
                if (!HardDrive)
                    HardDrive = DeviceUnit;
            }
        }
    }
}

Referenced by XboxDiskDriveNumberToDeviceUnit().

◆ XboxDiskReadLogicalSectors()

BOOLEAN XboxDiskReadLogicalSectors	(	IN UCHAR	DriveNumber,
		IN ULONGLONG	SectorNumber,
		IN ULONG	SectorCount,
		OUT PVOID	Buffer
	)

Definition at line 81 of file xboxdisk.c.

{
    PDEVICE_UNIT DeviceUnit;
 
    TRACE("XboxDiskReadLogicalSectors() DriveNumber: 0x%x SectorNumber: %I64d SectorCount: %d Buffer: 0x%x\n",
          DriveNumber, SectorNumber, SectorCount, Buffer);
 
    DeviceUnit = XboxDiskDriveNumberToDeviceUnit(DriveNumber);
    if (!DeviceUnit)
        return FALSE;
 
    return AtaReadLogicalSectors(DeviceUnit, SectorNumber, SectorCount, Buffer);
}