/* * Copyright (C) 2006-2011 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * -------------------------------------------------------------------- * * This code is based on: * * ROM BIOS for use with Bochs/Plex86/QEMU emulation environment * * Copyright (C) 2002 MandrakeSoft S.A. * * MandrakeSoft S.A. * 43, rue d'Aboukir * 75002 Paris - France * http://www.linux-mandrake.com/ * http://www.mandrakesoft.com/ * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * */ #include /* Must be defined here (EBDA structures depend on these). */ #define BX_MAX_ATA_INTERFACES 4 #define BX_MAX_ATA_DEVICES (BX_MAX_ATA_INTERFACES*2) #define BX_USE_ATADRV 1 #define BX_ELTORITO_BOOT 1 #ifdef VBOX_WITH_SCSI /* Enough for now */ #define BX_MAX_SCSI_DEVICES 4 /* A SCSI device starts always at BX_MAX_ATA_DEVICES. */ #define VBOX_IS_SCSI_DEVICE(device_id) (device_id >= BX_MAX_ATA_DEVICES) #define VBOX_GET_SCSI_DEVICE(device_id) (device_id - BX_MAX_ATA_DEVICES) #else #define BX_MAX_SCSI_DEVICES 0 #endif #ifdef VBOX_WITH_AHCI /* Four should be enough for now */ #define BX_MAX_AHCI_DEVICES 4 /* An AHCI device starts always at BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES. */ #define VBOX_IS_AHCI_DEVICE(device_id) (device_id >= (BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES)) #define VBOX_GET_AHCI_DEVICE(device_id) (device_id - (BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES)) #else #define BX_MAX_AHCI_DEVICES 0 #endif #define BX_MAX_STORAGE_DEVICES (BX_MAX_ATA_DEVICES + BX_MAX_SCSI_DEVICES + BX_MAX_AHCI_DEVICES) /* Generic storage device types. These depend on the controller type and * determine which device access routines should be called. */ enum dsk_type_enm { DSK_TYPE_NONE, /* Unknown device. */ DSK_TYPE_UNKNOWN, /* Unknown ATA device. */ DSK_TYPE_ATA, /* ATA disk. */ DSK_TYPE_ATAPI, /* ATAPI device. */ DSK_TYPE_SCSI, /* SCSI disk. */ DSK_TYPE_AHCI, /* SATA disk via AHCI. */ DSKTYP_CNT /* Number of disk types. */ }; /* Disk device types. */ //@todo: Do we really need these? #define DSK_DEVICE_NONE 0x00 /* No device attached. */ #define DSK_DEVICE_HD 0xFF /* Device is a hard disk. */ #define DSK_DEVICE_CDROM 0x05 /* Device is a CD-ROM. */ /* Geometry translation modes. */ enum geo_xlat_enm { GEO_TRANSLATION_NONE, /* No geometry translation. */ GEO_TRANSLATION_LBA, /* LBA translation. */ GEO_TRANSLATION_LARGE, /* Large CHS translation. */ GEO_TRANSLATION_RECHS }; #if 1 //BX_USE_ATADRV /* Note: The DPTE and FDPT structures are industry standards and * may not be modified. The other disk-related structures are * internal to the BIOS. */ /* Translated DPT (Device Parameter Table). */ typedef struct { uint16_t iobase1; uint16_t iobase2; uint8_t prefix; uint8_t unused; uint8_t irq; uint8_t blkcount; uint8_t dma; uint8_t pio; uint16_t options; uint16_t reserved; uint8_t revision; uint8_t checksum; } dpte_t; ct_assert(sizeof(dpte_t) == 16); /* Ensure correct size. */ #pragma pack(0) /* FDPT - Fixed Disk Parameter Table. PC/AT compatible; note * that this structure is slightly misaligned. */ typedef struct { uint16_t lcyl; uint8_t lhead; uint8_t sig; uint8_t spt; uint8_t resvd1[4]; uint16_t cyl; uint8_t head; uint8_t resvd2[2]; uint8_t lspt; uint8_t csum; } fdpt_t; #pragma pack() ct_assert(sizeof(fdpt_t) == 16); /* Ensure correct size. */ /* C/H/S geometry information. */ typedef struct { uint16_t heads; /* Number of heads. */ uint16_t cylinders; /* Number of cylinders. */ uint16_t spt; /* Number of sectors per track. */ } chs_t; /* IDE/ATA specific device information. */ typedef struct { uint8_t iface; /* ISA or PCI. */ uint8_t irq; /* IRQ (on the PIC). */ uint16_t iobase1; /* I/O base 1. */ uint16_t iobase2; /* I/O base 2. */ } ata_chan_t; #ifdef VBOX_WITH_SCSI /* SCSI specific device information. */ typedef struct { uint16_t io_base; /* Port base for HBA communication. */ uint8_t target_id; /* Target ID. */ } scsi_dev_t; #endif #ifdef VBOX_WITH_AHCI /* AHCI specific device information. */ typedef struct { uint8_t port; /* SATA port. */ } ahci_dev_t; #endif /* Generic disk information. */ typedef struct { uint8_t type; /* Device type (ATA/ATAPI/SCSI/none/unknown). */ uint8_t device; /* Detected type of attached device (HD/CD/none). */ uint8_t removable; /* Removable device flag. */ uint8_t lock; /* Lock count for removable devices. */ //@todo: ATA specific - move? uint8_t mode; /* Transfer mode: PIO 16/32 bits - IRQ - ISADMA - PCIDMA. */ uint8_t translation; /* Type of geometry translation. */ uint16_t blksize; /* Disk block size. */ chs_t lchs; /* Logical CHS geometry. */ chs_t pchs; /* Physical CHS geometry. */ uint32_t sectors; /* Total sector count. */ } disk_dev_t; /* A structure for passing disk request information around. This structure * is designed for saving stack space. As BIOS requests cannot be overlapped, * one such structure is sufficient. */ typedef struct { uint32_t lba; /* Starting LBA. */ void __far *buffer; /* Read/write data buffer pointer. */ uint8_t dev_id; /* Device ID; index into devices array. */ uint16_t nsect; /* Number of sectors to be transferred. */ uint16_t sect_sz; /* Size of a sector in bytes. */ uint16_t cylinder; /* Starting cylinder (CHS only). */ uint16_t head; /* Starting head (CHS only). */ uint16_t sector; /* Starting sector (CHS only). */ uint16_t trsfsectors; /* Actual sectors transferred. */ uint32_t trsfbytes; /* Actual bytes transferred. */ uint16_t skip_b; /* Bytes to skip before transfer. */ uint16_t skip_a; /* Bytes to skip after transfer. */ } disk_req_t; uint16_t ahci_cmd_packet(uint16_t device_id, uint8_t cmdlen, char __far *cmdbuf, uint16_t header, uint32_t length, uint8_t inout, char __far *buffer); uint16_t ata_cmd_packet(uint16_t device, uint8_t cmdlen, char __far *cmdbuf, uint16_t header, uint32_t length, uint8_t inout, char __far *buffer); /* All BIOS disk information. Disk-related code in the BIOS should not need * anything outside of this structure. */ typedef struct { disk_req_t drqp; /* Disk request packet. */ /* Bus-independent disk device information. */ disk_dev_t devices[BX_MAX_STORAGE_DEVICES]; uint8_t hdcount; /* Total number of BIOS disks. */ /* Map between (BIOS disk ID - 0x80) and ATA/SCSI/AHCI disks. */ uint8_t hdidmap[BX_MAX_STORAGE_DEVICES]; uint8_t cdcount; /* Number of CD-ROMs. */ /* Map between (BIOS CD-ROM ID - 0xE0) and ATA/SCSI/AHCI devices. */ uint8_t cdidmap[BX_MAX_STORAGE_DEVICES]; /* ATA bus-specific device information. */ ata_chan_t channels[BX_MAX_ATA_INTERFACES]; #ifdef VBOX_WITH_SCSI /* SCSI bus-specific device information. */ scsi_dev_t scsidev[BX_MAX_SCSI_DEVICES]; uint8_t scsi_hdcount; /* Number of SCSI disks. */ #endif #ifdef VBOX_WITH_AHCI /* SATA (AHCI) bus-specific device information. */ ahci_dev_t ahcidev[BX_MAX_AHCI_DEVICES]; uint8_t ahci_devcnt; /* Number of SATA devices. */ uint16_t ahci_seg; /* Segment of AHCI data block. */ #endif dpte_t dpte; /* Buffer for building a DPTE. */ } bio_dsk_t; #if BX_ELTORITO_BOOT /* El Torito device emulation state. */ typedef struct { uint8_t active; uint8_t media; uint8_t emulated_drive; uint8_t controller_index; uint16_t device_spec; uint16_t buffer_segment; uint32_t ilba; uint16_t load_segment; uint16_t sector_count; chs_t vdevice; /* Virtual device geometry. */ } cdemu_t; #endif // for access to EBDA area // The EBDA structure should conform to // http://www.frontiernet.net/~fys/rombios.htm document // I made the ata and cdemu structs begin at 0x121 in the EBDA seg /* MS-DOS KEYB.COM may overwrite the word at offset 0x117 in the EBDA * which contains the keyboard ID for PS/2 BIOSes. */ typedef struct { uint8_t filler1[0x3D]; fdpt_t fdpt0; /* FDPTs for the first two ATA disks. */ fdpt_t fdpt1; uint8_t filler2[0xC4]; bio_dsk_t bdisk; /* Disk driver data (ATA/SCSI/AHCI). */ #if BX_ELTORITO_BOOT cdemu_t cdemu; /* El Torito floppy/HD emulation data. */ #endif unsigned char uForceBootDrive; unsigned char uForceBootDevice; } ebda_data_t; ct_assert(sizeof(ebda_data_t) < 0x380); /* Must be under 1K in size. */ // the last 16 bytes of the EBDA segment are used for the MPS floating // pointer structure (though only if an I/O APIC is present) #define EbdaData ((ebda_data_t *) 0) /* Note: Using fastcall reduces stack usage a little. */ int __fastcall ata_read_sectors(bio_dsk_t __far *bios_dsk); int __fastcall ata_write_sectors(bio_dsk_t __far *bios_dsk); int __fastcall scsi_read_sectors(bio_dsk_t __far *bios_dsk); int __fastcall scsi_write_sectors(bio_dsk_t __far *bios_dsk); int __fastcall ahci_read_sectors(bio_dsk_t __far *bios_dsk); int __fastcall ahci_write_sectors(bio_dsk_t __far *bios_dsk); // @todo: put this elsewhere (and change/eliminate?) #define SET_DISK_RET_STATUS(status) write_byte(0x0040, 0x0074, status) #endif