* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <freeldr.h>
#define NDEBUG
#include <debug.h>
-/* non-standard specifier from windef.h -- please deprecate */
-#undef PACKED
-#ifdef __GNUC__
-#define PACKED __attribute__((packed))
-#endif
-
+#include <pshpack2.h>
typedef struct
{
UCHAR PacketSize; // 00h - Size of packet (10h or 18h)
// used if DWORD at 04h is FFFFh:FFFFh
// Commented since some earlier BIOSes refuse to work with
// such extended structure
-} PACKED I386_DISK_ADDRESS_PACKET, *PI386_DISK_ADDRESS_PACKET;
+} I386_DISK_ADDRESS_PACKET, *PI386_DISK_ADDRESS_PACKET;
+#include <poppack.h>
/////////////////////////////////////////////////////////////////////////////////////////////
// FUNCTIONS
REGS RegsIn;
REGS RegsOut;
- DbgPrint((DPRINT_DISK, "PcDiskResetController(0x%x) DISK OPERATION FAILED -- RESETTING CONTROLLER\n", DriveNumber));
+ DPRINTM(DPRINT_DISK, "PcDiskResetController(0x%x) DISK OPERATION FAILED -- RESETTING CONTROLLER\n", DriveNumber);
// BIOS Int 13h, function 0 - Reset disk system
// AH = 00h
ULONG RetryCount;
PI386_DISK_ADDRESS_PACKET Packet = (PI386_DISK_ADDRESS_PACKET)(BIOSCALLBUFFER);
- DbgPrint((DPRINT_DISK, "PcDiskReadLogicalSectorsLBA() DriveNumber: 0x%x SectorNumber: %I64d SectorCount: %d Buffer: 0x%x\n", DriveNumber, SectorNumber, SectorCount, Buffer));
+ DPRINTM(DPRINT_DISK, "PcDiskReadLogicalSectorsLBA() DriveNumber: 0x%x SectorNumber: %I64d SectorCount: %d Buffer: 0x%x\n", DriveNumber, SectorNumber, SectorCount, Buffer);
// BIOS int 0x13, function 42h - IBM/MS INT 13 Extensions - EXTENDED READ
RegsIn.b.ah = 0x42; // Subfunction 42h
REGS RegsOut;
ULONG RetryCount;
- DbgPrint((DPRINT_DISK, "PcDiskReadLogicalSectorsCHS()\n"));
+ DPRINTM(DPRINT_DISK, "PcDiskReadLogicalSectorsCHS()\n");
//
// Get the drive geometry
return TRUE;
}
-static BOOLEAN PcDiskInt13ExtensionsSupported(ULONG DriveNumber)
-{
- static ULONG LastDriveNumber = 0xffffffff;
- static BOOLEAN LastSupported;
- REGS RegsIn;
- REGS RegsOut;
-
- DbgPrint((DPRINT_DISK, "PcDiskInt13ExtensionsSupported()\n"));
-
- if (DriveNumber == LastDriveNumber)
- {
- DbgPrint((DPRINT_DISK, "Using cached value %s for drive 0x%x\n", LastSupported ? "TRUE" : "FALSE", DriveNumber));
- return LastSupported;
- }
-
- // Some BIOSes report that extended disk access functions are not supported
- // when booting from a CD (e.g. Phoenix BIOS v6.00PG and Insyde BIOS shipping
- // with Intel Macs). Therefore we just return TRUE if we're booting from a CD -
- // we can assume that all El Torito capable BIOSes support INT 13 extensions.
- // We simply detect whether we're booting from CD by checking whether the drive
- // number is >= 0x90. It's 0x90 on the Insyde BIOS, and 0x9F on most other BIOSes.
- if (DriveNumber >= 0x90)
- {
- LastSupported = TRUE;
- return TRUE;
- }
-
- LastDriveNumber = DriveNumber;
-
- // IBM/MS INT 13 Extensions - INSTALLATION CHECK
- // AH = 41h
- // BX = 55AAh
- // DL = drive (80h-FFh)
- // Return:
- // CF set on error (extensions not supported)
- // AH = 01h (invalid function)
- // CF clear if successful
- // BX = AA55h if installed
- // AH = major version of extensions
- // 01h = 1.x
- // 20h = 2.0 / EDD-1.0
- // 21h = 2.1 / EDD-1.1
- // 30h = EDD-3.0
- // AL = internal use
- // CX = API subset support bitmap
- // DH = extension version (v2.0+ ??? -- not present in 1.x)
- //
- // Bitfields for IBM/MS INT 13 Extensions API support bitmap
- // Bit 0, extended disk access functions (AH=42h-44h,47h,48h) supported
- // Bit 1, removable drive controller functions (AH=45h,46h,48h,49h,INT 15/AH=52h) supported
- // Bit 2, enhanced disk drive (EDD) functions (AH=48h,AH=4Eh) supported
- // extended drive parameter table is valid
- // Bits 3-15 reserved
- RegsIn.b.ah = 0x41;
- RegsIn.w.bx = 0x55AA;
- RegsIn.b.dl = DriveNumber;
-
- // Reset the disk controller
- Int386(0x13, &RegsIn, &RegsOut);
-
- if (!INT386_SUCCESS(RegsOut))
- {
- // CF set on error (extensions not supported)
- LastSupported = FALSE;
- return FALSE;
- }
-
- if (RegsOut.w.bx != 0xAA55)
- {
- // BX = AA55h if installed
- LastSupported = FALSE;
- return FALSE;
- }
-
- if (!(RegsOut.w.cx & 0x0001))
- {
- // CX = API subset support bitmap
- // Bit 0, extended disk access functions (AH=42h-44h,47h,48h) supported
- printf("Suspicious API subset support bitmap 0x%x on device 0x%lx\n", RegsOut.w.cx, DriveNumber);
- LastSupported = FALSE;
- return FALSE;
- }
-
- LastSupported = TRUE;
- return TRUE;
-}
-
BOOLEAN PcDiskReadLogicalSectors(ULONG DriveNumber, ULONGLONG SectorNumber, ULONG SectorCount, PVOID Buffer)
{
- DbgPrint((DPRINT_DISK, "PcDiskReadLogicalSectors() DriveNumber: 0x%x SectorNumber: %I64d SectorCount: %d Buffer: 0x%x\n", DriveNumber, SectorNumber, SectorCount, Buffer));
+ DPRINTM(DPRINT_DISK, "PcDiskReadLogicalSectors() DriveNumber: 0x%x SectorNumber: %I64d SectorCount: %d Buffer: 0x%x\n", DriveNumber, SectorNumber, SectorCount, Buffer);
//
// Check to see if it is a fixed disk drive
// If so then check to see if Int13 extensions work
// If they do then use them, otherwise default back to BIOS calls
//
- if ((DriveNumber >= 0x80) && PcDiskInt13ExtensionsSupported(DriveNumber))
+ if ((DriveNumber >= 0x80) && DiskInt13ExtensionsSupported(DriveNumber))
{
- DbgPrint((DPRINT_DISK, "Using Int 13 Extensions for read. PcDiskInt13ExtensionsSupported(%d) = %s\n", DriveNumber, PcDiskInt13ExtensionsSupported(DriveNumber) ? "TRUE" : "FALSE"));
+ DPRINTM(DPRINT_DISK, "Using Int 13 Extensions for read. DiskInt13ExtensionsSupported(%d) = %s\n", DriveNumber, DiskInt13ExtensionsSupported(DriveNumber) ? "TRUE" : "FALSE");
//
// LBA is easy, nothing to calculate
REGS RegsOut;
ULONG Cylinders;
- DbgPrint((DPRINT_DISK, "DiskGetDriveGeometry()\n"));
+ DPRINTM(DPRINT_DISK, "DiskGetDriveGeometry()\n");
/* BIOS Int 13h, function 08h - Get drive parameters
* AH = 08h
projects / reactos.git / blobdiff