/* * Copyright (C) 2006-2015 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 #include #include "inlines.h" #include "biosint.h" #include "ebda.h" #include "ata.h" #if DEBUG_ELTORITO # define BX_DEBUG_INT13_ET(...) BX_DEBUG(__VA_ARGS__) #else # define BX_DEBUG_INT13_ET(...) #endif #if DEBUG_INT13_CD # define BX_DEBUG_INT13_CD(...) BX_DEBUG(__VA_ARGS__) #else # define BX_DEBUG_INT13_CD(...) #endif #if DEBUG_CD_BOOT # define BX_DEBUG_ELTORITO(...) BX_DEBUG(__VA_ARGS__) #else # define BX_DEBUG_ELTORITO(...) #endif //@todo: put in a header #define AX r.gr.u.r16.ax #define BX r.gr.u.r16.bx #define CX r.gr.u.r16.cx #define DX r.gr.u.r16.dx #define SI r.gr.u.r16.si #define DI r.gr.u.r16.di #define BP r.gr.u.r16.bp #define ELDX r.gr.u.r16.sp #define DS r.ds #define ES r.es #define FLAGS r.ra.flags.u.r16.flags #pragma pack(1) /* READ_10/WRITE_10 CDB padded to 12 bytes for ATAPI. */ typedef struct { uint16_t command; /* Command. */ uint32_t lba; /* LBA, MSB first! */ uint8_t pad1; /* Unused. */ uint16_t nsect; /* Sector count, MSB first! */ uint8_t pad2[3]; /* Unused. */ } cdb_atapi; #pragma pack() ct_assert(sizeof(cdb_atapi) == 12); /* Generic ATAPI/SCSI CD-ROM access routine signature. */ typedef uint16_t (* cd_pkt_func)(uint16_t device_id, uint8_t cmdlen, char __far *cmdbuf, uint16_t header, uint32_t length, uint8_t inout, char __far *buffer); /* Pointers to HW specific CD-ROM access routines. */ cd_pkt_func pktacc[DSKTYP_CNT] = { [DSK_TYPE_ATAPI] = { ata_cmd_packet }, #ifdef VBOX_WITH_AHCI [DSK_TYPE_AHCI] = { ahci_cmd_packet }, #endif #ifdef VBOX_WITH_SCSI [DSK_TYPE_SCSI] = { scsi_cmd_packet }, #endif }; #if defined(VBOX_WITH_AHCI) || defined(VBOX_WITH_SCSI) uint16_t dummy_soft_reset(uint16_t device_id) { return 0; } #endif /* Generic reset routine signature. */ typedef uint16_t (* cd_rst_func)(uint16_t device_id); /* Pointers to HW specific CD-ROM reset routines. */ cd_rst_func softrst[DSKTYP_CNT] = { [DSK_TYPE_ATAPI] = { ata_soft_reset }, #ifdef VBOX_WITH_AHCI [DSK_TYPE_AHCI] = { dummy_soft_reset }, #endif #ifdef VBOX_WITH_SCSI [DSK_TYPE_SCSI] = { dummy_soft_reset }, #endif }; // --------------------------------------------------------------------------- // Start of El-Torito boot functions // --------------------------------------------------------------------------- // !! TODO !! convert EBDA accesses to far pointers extern int diskette_param_table; void BIOSCALL cdemu_init(void) { // @TODO: a macro or a function for getting the EBDA segment uint16_t ebda_seg = read_word(0x0040,0x000E); // the only important data is this one for now write_byte(ebda_seg,(uint16_t)&EbdaData->cdemu.active, 0x00); } uint8_t BIOSCALL cdemu_isactive(void) { // @TODO: a macro or a function for getting the EBDA segment uint16_t ebda_seg = read_word(0x0040,0x000E); return read_byte(ebda_seg,(uint16_t)&EbdaData->cdemu.active); } uint8_t BIOSCALL cdemu_emulated_drive(void) { // @TODO: a macro or a function for getting the EBDA segment uint16_t ebda_seg = read_word(0x0040,0x000E); return read_byte(ebda_seg,(uint16_t)&EbdaData->cdemu.emulated_drive); } // --------------------------------------------------------------------------- // Start of int13 for eltorito functions // --------------------------------------------------------------------------- void BIOSCALL int13_eltorito(disk_regs_t r) { // @TODO: a macro or a function for getting the EBDA segment uint16_t ebda_seg=read_word(0x0040,0x000E); cdemu_t __far *cdemu; cdemu = ebda_seg :> &EbdaData->cdemu; BX_DEBUG_INT13_ET("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES); // BX_DEBUG_INT13_ET("%s: SS=%04x DS=%04x ES=%04x DI=%04x SI=%04x\n", __func__, get_SS(), DS, ES, DI, SI); switch (GET_AH()) { // FIXME ElTorito Various. Not implemented in many real BIOSes. case 0x4a: // ElTorito - Initiate disk emu case 0x4c: // ElTorito - Initiate disk emu and boot case 0x4d: // ElTorito - Return Boot catalog BX_INFO("%s: call with AX=%04x not implemented.\n", __func__, AX); goto int13_fail; break; case 0x4b: // ElTorito - Terminate disk emu // FIXME ElTorito Hardcoded //@todo: maybe our cdemu struct should match El Torito to allow memcpy()? write_byte(DS,SI+0x00,0x13); write_byte(DS,SI+0x01,cdemu->media); write_byte(DS,SI+0x02,cdemu->emulated_drive); write_byte(DS,SI+0x03,cdemu->controller_index); write_dword(DS,SI+0x04,cdemu->ilba); write_word(DS,SI+0x08,cdemu->device_spec); write_word(DS,SI+0x0a,cdemu->buffer_segment); write_word(DS,SI+0x0c,cdemu->load_segment); write_word(DS,SI+0x0e,cdemu->sector_count); write_byte(DS,SI+0x10,cdemu->vdevice.cylinders); write_byte(DS,SI+0x11,cdemu->vdevice.spt); write_byte(DS,SI+0x12,cdemu->vdevice.heads); // If we have to terminate emulation if(GET_AL() == 0x00) { // FIXME ElTorito Various. Should be handled accordingly to spec cdemu->active = 0; // bye bye } goto int13_success; break; default: BX_INFO("%s: unsupported AH=%02x\n", __func__, GET_AH()); goto int13_fail; break; } int13_fail: SET_AH(0x01); // defaults to invalid function in AH or invalid parameter SET_DISK_RET_STATUS(GET_AH()); SET_CF(); // error occurred return; int13_success: SET_AH(0x00); // no error SET_DISK_RET_STATUS(0x00); CLEAR_CF(); // no error return; } // --------------------------------------------------------------------------- // End of int13 for eltorito functions // --------------------------------------------------------------------------- /* Utility routine to check if a device is a CD-ROM. */ //@todo: this function is kinda useless as the ATAPI type check is obsolete. static uint16_t device_is_cdrom(uint8_t device) { bio_dsk_t __far *bios_dsk; bios_dsk = read_word(0x0040, 0x000E) :> &EbdaData->bdisk; if (device >= BX_MAX_STORAGE_DEVICES) return 0; // if (bios_dsk->devices[device].type != DSK_TYPE_ATAPI) // return 0; if (bios_dsk->devices[device].device != DSK_DEVICE_CDROM) return 0; return 1; } // --------------------------------------------------------------------------- // End of ATA/ATAPI generic functions // --------------------------------------------------------------------------- static const char isotag[]="CD001"; static const char eltorito[]="EL TORITO SPECIFICATION"; // // Returns ah: emulated drive, al: error code // uint16_t cdrom_boot(void) { // @TODO: a macro or a function for getting the EBDA segment uint16_t ebda_seg=read_word(0x0040,0x000E); uint8_t buffer[2048]; cdb_atapi atapicmd; uint32_t lba; uint16_t boot_segment, nbsectors, i, error; uint8_t device; uint8_t read_try; cdemu_t __far *cdemu; bio_dsk_t __far *bios_dsk; cdemu = ebda_seg :> &EbdaData->cdemu; bios_dsk = ebda_seg :> &EbdaData->bdisk; /* Find the first CD-ROM. */ for (device = 0; device < BX_MAX_STORAGE_DEVICES; ++device) { if (device_is_cdrom(device)) break; } /* Fail if not found. */ if (device >= BX_MAX_STORAGE_DEVICES) return 2; /* Read the Boot Record Volume Descriptor (BRVD). */ _fmemset(&atapicmd, 0, sizeof(atapicmd)); atapicmd.command = 0x28; // READ 10 command atapicmd.lba = swap_32(0x11); atapicmd.nsect = swap_16(1); bios_dsk->drqp.nsect = 1; bios_dsk->drqp.sect_sz = 2048; for (read_try = 0; read_try <= 4; ++read_try) { error = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, 0, 2048L, ATA_DATA_IN, &buffer); if (!error) break; } if (error) return 3; /* Check for a valid BRVD. */ if (buffer[0] != 0) return 4; //@todo: what's wrong with memcmp()? for (i = 0; i < 5; ++i) { if (buffer[1+i] != isotag[i]) return 5; } for (i = 0; i < 23; ++i) if (buffer[7+i] != eltorito[i]) return 6; // ok, now we calculate the Boot catalog address lba = *((uint32_t *)&buffer[0x47]); BX_DEBUG_ELTORITO("BRVD at LBA %lx\n", lba); /* Now we read the Boot Catalog. */ atapicmd.command = 0x28; // READ 10 command atapicmd.lba = swap_32(lba); atapicmd.nsect = swap_16(1); #if 0 // Not necessary as long as previous values are reused bios_dsk->drqp.nsect = 1; bios_dsk->drqp.sect_sz = 512; #endif error = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, 0, 2048L, ATA_DATA_IN, &buffer); if (error != 0) return 7; //@todo: Define a struct for the Boot Catalog, the hardcoded offsets are so dumb... /* Check if the Boot Catalog looks valid. */ if (buffer[0x00] != 0x01) return 8; // Header if (buffer[0x01] != 0x00) return 9; // Platform if (buffer[0x1E] != 0x55) return 10; // key 1 if (buffer[0x1F] != 0xAA) return 10; // key 2 // Initial/Default Entry if (buffer[0x20] != 0x88) return 11; // Bootable cdemu->media = buffer[0x21]; if (buffer[0x21] == 0) { // FIXME ElTorito Hardcoded. cdrom is hardcoded as device 0xE0. // Win2000 cd boot needs to know it booted from cd cdemu->emulated_drive = 0xE0; } else if (buffer[0x21] < 4) cdemu->emulated_drive = 0x00; else cdemu->emulated_drive = 0x80; cdemu->controller_index = device / 2; cdemu->device_spec = device % 2; boot_segment = *((uint16_t *)&buffer[0x22]); if (boot_segment == 0) boot_segment = 0x07C0; cdemu->load_segment = boot_segment; cdemu->buffer_segment = 0x0000; nbsectors = ((uint16_t *)buffer)[0x26 / 2]; cdemu->sector_count = nbsectors; /* Sanity check the sector count. In incorrectly mastered CDs, it might * be zero. If it's more than 512K, reject it as well. */ if (nbsectors == 0 || nbsectors > 1024) return 12; lba = *((uint32_t *)&buffer[0x28]); cdemu->ilba = lba; BX_DEBUG_ELTORITO("Emulate drive %02x, type %02x, LBA %lu\n", cdemu->emulated_drive, cdemu->media, cdemu->ilba); /* Read the disk image's boot sector into memory. */ atapicmd.command = 0x28; // READ 10 command atapicmd.lba = swap_32(lba); atapicmd.nsect = swap_16(1 + (nbsectors - 1) / 4); bios_dsk->drqp.nsect = 1 + (nbsectors - 1) / 4; bios_dsk->drqp.sect_sz = 512; bios_dsk->drqp.skip_a = (2048 - nbsectors * 512) % 2048; error = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, 0, nbsectors*512L, ATA_DATA_IN, MK_FP(boot_segment,0)); bios_dsk->drqp.skip_a = 0; if (error != 0) return 13; BX_DEBUG_ELTORITO("Emulate drive %02x, type %02x, LBA %lu\n", cdemu->emulated_drive, cdemu->media, cdemu->ilba); /* Set up emulated drive geometry based on the media type. */ switch (cdemu->media) { case 0x01: /* 1.2M floppy */ cdemu->vdevice.spt = 15; cdemu->vdevice.cylinders = 80; cdemu->vdevice.heads = 2; break; case 0x02: /* 1.44M floppy */ cdemu->vdevice.spt = 18; cdemu->vdevice.cylinders = 80; cdemu->vdevice.heads = 2; break; case 0x03: /* 2.88M floppy */ cdemu->vdevice.spt = 36; cdemu->vdevice.cylinders = 80; cdemu->vdevice.heads = 2; break; case 0x04: /* Hard disk */ cdemu->vdevice.spt = read_byte(boot_segment,446+6)&0x3f; cdemu->vdevice.cylinders = (read_byte(boot_segment,446+6)<<2) + read_byte(boot_segment,446+7) + 1; cdemu->vdevice.heads = read_byte(boot_segment,446+5) + 1; break; } BX_DEBUG_ELTORITO("VCHS=%u/%u/%u\n", cdemu->vdevice.cylinders, cdemu->vdevice.heads, cdemu->vdevice.spt); if (cdemu->media != 0) { /* Increase BIOS installed number of drives (floppy or fixed). */ if (cdemu->emulated_drive == 0x00) write_byte(0x40,0x10,read_byte(0x40,0x10)|0x41); else write_byte(ebda_seg,(uint16_t)&EbdaData->bdisk.hdcount, read_byte(ebda_seg, (uint16_t)&EbdaData->bdisk.hdcount) + 1); } // everything is ok, so from now on, the emulation is active if (cdemu->media != 0) cdemu->active = 0x01; // return the boot drive + no error return (cdemu->emulated_drive*0x100)+0; } // --------------------------------------------------------------------------- // End of El-Torito boot functions // --------------------------------------------------------------------------- // --------------------------------------------------------------------------- // Start of int13 when emulating a device from the cd // --------------------------------------------------------------------------- void BIOSCALL int13_cdemu(disk_regs_t r) { // @TODO: a macro or a function for getting the EBDA segment uint16_t ebda_seg=read_word(0x0040,0x000E); uint8_t device, status; uint16_t vheads, vspt, vcylinders; uint16_t head, sector, cylinder, nbsectors; uint32_t vlba, ilba, slba, elba; uint16_t before, segment, offset; cdb_atapi atapicmd; cdemu_t __far *cdemu; bio_dsk_t __far *bios_dsk; cdemu = ebda_seg :> &EbdaData->cdemu; bios_dsk = ebda_seg :> &EbdaData->bdisk; BX_DEBUG_INT13_ET("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES); /* at this point, we are emulating a floppy/harddisk */ // Recompute the device number device = cdemu->controller_index * 2; device += cdemu->device_spec; SET_DISK_RET_STATUS(0x00); /* basic checks : emulation should be active, dl should equal the emulated drive */ if (!cdemu->active || (cdemu->emulated_drive != GET_DL())) { BX_INFO("%s: function %02x, emulation not active for DL= %02x\n", __func__, GET_AH(), GET_DL()); goto int13_fail; } switch (GET_AH()) { case 0x00: /* disk controller reset */ if (pktacc[bios_dsk->devices[device].type]) { status = softrst[bios_dsk->devices[device].type](device); } goto int13_success; break; // all those functions return SUCCESS case 0x09: /* initialize drive parameters */ case 0x0c: /* seek to specified cylinder */ case 0x0d: /* alternate disk reset */ // FIXME ElTorito Various. should really reset ? case 0x10: /* check drive ready */ // FIXME ElTorito Various. should check if ready ? case 0x11: /* recalibrate */ case 0x14: /* controller internal diagnostic */ case 0x16: /* detect disk change */ goto int13_success; break; // all those functions return disk write-protected case 0x03: /* write disk sectors */ case 0x05: /* format disk track */ SET_AH(0x03); goto int13_fail_noah; break; case 0x01: /* read disk status */ status=read_byte(0x0040, 0x0074); SET_AH(status); SET_DISK_RET_STATUS(0); /* set CF if error status read */ if (status) goto int13_fail_nostatus; else goto int13_success_noah; break; case 0x02: // read disk sectors case 0x04: // verify disk sectors vspt = cdemu->vdevice.spt; vcylinders = cdemu->vdevice.cylinders; vheads = cdemu->vdevice.heads; ilba = cdemu->ilba; sector = GET_CL() & 0x003f; cylinder = (GET_CL() & 0x00c0) << 2 | GET_CH(); head = GET_DH(); nbsectors = GET_AL(); segment = ES; offset = BX; BX_DEBUG_INT13_ET("%s: read to %04x:%04x @ VCHS %u/%u/%u (%u sectors)\n", __func__, ES, BX, cylinder, head, sector, nbsectors); // no sector to read ? if(nbsectors==0) goto int13_success; // sanity checks sco openserver needs this! if ((sector > vspt) || (cylinder >= vcylinders) || (head >= vheads)) { goto int13_fail; } // After validating the input, verify does nothing if (GET_AH() == 0x04) goto int13_success; segment = ES+(BX / 16); offset = BX % 16; // calculate the virtual lba inside the image vlba=((((uint32_t)cylinder*(uint32_t)vheads)+(uint32_t)head)*(uint32_t)vspt)+((uint32_t)(sector-1)); // In advance so we don't lose the count SET_AL(nbsectors); // start lba on cd slba = (uint32_t)vlba / 4; before = (uint32_t)vlba % 4; // end lba on cd elba = (uint32_t)(vlba + nbsectors - 1) / 4; _fmemset(&atapicmd, 0, sizeof(atapicmd)); atapicmd.command = 0x28; // READ 10 command atapicmd.lba = swap_32(ilba + slba); atapicmd.nsect = swap_16(elba - slba + 1); bios_dsk->drqp.nsect = nbsectors; bios_dsk->drqp.sect_sz = 512; bios_dsk->drqp.skip_b = before * 512; bios_dsk->drqp.skip_a = ((4 - nbsectors % 4 - before) * 512) % 2048; status = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, before*512, nbsectors*512L, ATA_DATA_IN, MK_FP(segment,offset)); bios_dsk->drqp.skip_b = 0; bios_dsk->drqp.skip_a = 0; if (status != 0) { BX_INFO("%s: function %02x, error %02x !\n", __func__, GET_AH(), status); SET_AH(0x02); SET_AL(0); goto int13_fail_noah; } goto int13_success; break; case 0x08: /* read disk drive parameters */ vspt = cdemu->vdevice.spt; vcylinders = cdemu->vdevice.cylinders - 1; vheads = cdemu->vdevice.heads - 1; SET_AL( 0x00 ); SET_BL( 0x00 ); SET_CH( vcylinders & 0xff ); SET_CL((( vcylinders >> 2) & 0xc0) | ( vspt & 0x3f )); SET_DH( vheads ); SET_DL( 0x02 ); // FIXME ElTorito Various. should send the real count of drives 1 or 2 // FIXME ElTorito Harddisk. should send the HD count switch (cdemu->media) { case 0x01: SET_BL( 0x02 ); break; /* 1.2 MB */ case 0x02: SET_BL( 0x04 ); break; /* 1.44 MB */ case 0x03: SET_BL( 0x05 ); break; /* 2.88 MB */ } /* Only set the DPT pointer for emulated floppies. */ if (cdemu->media < 4) { DI = (uint16_t)&diskette_param_table; // @todo: should this depend on emulated medium? ES = 0xF000; // @todo: how to make this relocatable? } goto int13_success; break; case 0x15: /* read disk drive size */ // FIXME ElTorito Harddisk. What geometry to send ? SET_AH(0x03); goto int13_success_noah; break; // all those functions return unimplemented case 0x0a: /* read disk sectors with ECC */ case 0x0b: /* write disk sectors with ECC */ case 0x18: /* set media type for format */ case 0x41: // IBM/MS installation check // FIXME ElTorito Harddisk. Darwin would like to use EDD case 0x42: // IBM/MS extended read case 0x43: // IBM/MS extended write case 0x44: // IBM/MS verify sectors case 0x45: // IBM/MS lock/unlock drive case 0x46: // IBM/MS eject media case 0x47: // IBM/MS extended seek case 0x48: // IBM/MS get drive parameters case 0x49: // IBM/MS extended media change case 0x4e: // ? - set hardware configuration case 0x50: // ? - send packet command default: BX_INFO("%s: function AH=%02x unsupported, returns fail\n", __func__, GET_AH()); goto int13_fail; break; } int13_fail: SET_AH(0x01); // defaults to invalid function in AH or invalid parameter int13_fail_noah: SET_DISK_RET_STATUS(GET_AH()); int13_fail_nostatus: SET_CF(); // error occurred return; int13_success: SET_AH(0x00); // no error int13_success_noah: SET_DISK_RET_STATUS(0x00); CLEAR_CF(); // no error return; } // --------------------------------------------------------------------------- // Start of int13 for cdrom // --------------------------------------------------------------------------- void BIOSCALL int13_cdrom(uint16_t EHBX, disk_regs_t r) { uint16_t ebda_seg = read_word(0x0040,0x000E); uint8_t device, status, locks; cdb_atapi atapicmd; uint32_t lba; uint16_t count, segment, offset, size; bio_dsk_t __far *bios_dsk; int13ext_t __far *i13x; dpt_t __far *dpt; bios_dsk = ebda_seg :> &EbdaData->bdisk; BX_DEBUG_INT13_CD("%s: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", __func__, AX, BX, CX, DX, ES); SET_DISK_RET_STATUS(0x00); /* basic check : device should be 0xE0+ */ if( (GET_ELDL() < 0xE0) || (GET_ELDL() >= 0xE0 + BX_MAX_STORAGE_DEVICES) ) { BX_DEBUG("%s: function %02x, ELDL out of range %02x\n", __func__, GET_AH(), GET_ELDL()); goto int13_fail; } // Get the ata channel device = bios_dsk->cdidmap[GET_ELDL()-0xE0]; /* basic check : device has to be valid */ if (device >= BX_MAX_STORAGE_DEVICES) { BX_DEBUG("%s: function %02x, unmapped device for ELDL=%02x\n", __func__, GET_AH(), GET_ELDL()); goto int13_fail; } switch (GET_AH()) { // all those functions return SUCCESS case 0x00: /* disk controller reset */ case 0x09: /* initialize drive parameters */ case 0x0c: /* seek to specified cylinder */ case 0x0d: /* alternate disk reset */ case 0x10: /* check drive ready */ case 0x11: /* recalibrate */ case 0x14: /* controller internal diagnostic */ case 0x16: /* detect disk change */ goto int13_success; break; // all those functions return disk write-protected case 0x03: /* write disk sectors */ case 0x05: /* format disk track */ case 0x43: // IBM/MS extended write SET_AH(0x03); goto int13_fail_noah; break; case 0x01: /* read disk status */ status = read_byte(0x0040, 0x0074); SET_AH(status); SET_DISK_RET_STATUS(0); /* set CF if error status read */ if (status) goto int13_fail_nostatus; else goto int13_success_noah; break; case 0x15: /* read disk drive size */ SET_AH(0x02); goto int13_fail_noah; break; case 0x41: // IBM/MS installation check BX = 0xaa55; // install check SET_AH(0x30); // EDD 2.1 CX = 0x0007; // ext disk access, removable and edd goto int13_success_noah; break; case 0x42: // IBM/MS extended read case 0x44: // IBM/MS verify sectors case 0x47: // IBM/MS extended seek /* Load the I13X struct pointer. */ i13x = MK_FP(DS, SI); count = i13x->count; segment = i13x->segment; offset = i13x->offset; // Can't use 64 bits lba lba = i13x->lba2; if (lba != 0L) { BX_PANIC("%s: function %02x. Can't use 64bits lba\n", __func__, GET_AH()); goto int13_fail; } // Get 32 bits lba lba = i13x->lba1; // If verify or seek if (( GET_AH() == 0x44 ) || ( GET_AH() == 0x47 )) goto int13_success; BX_DEBUG_INT13_CD("%s: read %u sectors @ LBA %lu to %04X:%04X\n", __func__, count, lba, segment, offset); _fmemset(&atapicmd, 0, sizeof(atapicmd)); atapicmd.command = 0x28; // READ 10 command atapicmd.lba = swap_32(lba); atapicmd.nsect = swap_16(count); bios_dsk->drqp.nsect = count; bios_dsk->drqp.sect_sz = 2048; status = pktacc[bios_dsk->devices[device].type](device, 12, (char __far *)&atapicmd, 0, count*2048L, ATA_DATA_IN, MK_FP(segment,offset)); count = (uint16_t)(bios_dsk->drqp.trsfbytes >> 11); i13x->count = count; if (status != 0) { BX_INFO("%s: function %02x, status %02x !\n", __func__, GET_AH(), status); SET_AH(0x0c); goto int13_fail_noah; } goto int13_success; break; case 0x45: // IBM/MS lock/unlock drive if (GET_AL() > 2) goto int13_fail; locks = bios_dsk->devices[device].lock; switch (GET_AL()) { case 0 : // lock if (locks == 0xff) { SET_AH(0xb4); SET_AL(1); goto int13_fail_noah; } bios_dsk->devices[device].lock = ++locks; SET_AL(1); break; case 1 : // unlock if (locks == 0x00) { SET_AH(0xb0); SET_AL(0); goto int13_fail_noah; } bios_dsk->devices[device].lock = --locks; SET_AL(locks==0?0:1); break; case 2 : // status SET_AL(locks==0?0:1); break; } goto int13_success; break; case 0x46: // IBM/MS eject media locks = bios_dsk->devices[device].lock; if (locks != 0) { SET_AH(0xb1); // media locked goto int13_fail_noah; } // FIXME should handle 0x31 no media in device // FIXME should handle 0xb5 valid request failed #if 0 //@todo: implement! // Call removable media eject ASM_START push bp mov bp, sp mov ah, #0x52 int #0x15 mov _int13_cdrom.status + 2[bp], ah jnc int13_cdrom_rme_end mov _int13_cdrom.status, #1 int13_cdrom_rme_end: pop bp ASM_END #endif if (status != 0) { SET_AH(0xb1); // media locked goto int13_fail_noah; } goto int13_success; break; //@todo: Part of this should be merged with analogous code in disk.c case 0x48: // IBM/MS get drive parameters dpt = DS :> (dpt_t *)SI; size = dpt->size; // Buffer is too small if (size < 0x1a) goto int13_fail; // EDD 1.x if (size >= 0x1a) { uint16_t blksize; blksize = bios_dsk->devices[device].blksize; dpt->size = 0x1a; dpt->infos = 0x74; /* Removable, media change, lockable, max values */ dpt->cylinders = 0xffffffff; dpt->heads = 0xffffffff; dpt->spt = 0xffffffff; dpt->blksize = blksize; dpt->sector_count1 = 0xffffffff; // FIXME should be Bit64 dpt->sector_count2 = 0xffffffff; } // EDD 2.x if(size >= 0x1e) { uint8_t channel, irq, mode, checksum, i; uint16_t iobase1, iobase2, options; dpt->size = 0x1e; dpt->dpte_segment = ebda_seg; dpt->dpte_offset = (uint16_t)&EbdaData->bdisk.dpte; // Fill in dpte channel = device / 2; iobase1 = bios_dsk->channels[channel].iobase1; iobase2 = bios_dsk->channels[channel].iobase2; irq = bios_dsk->channels[channel].irq; mode = bios_dsk->devices[device].mode; // FIXME atapi device options = (1<<4); // lba translation options |= (1<<5); // removable device options |= (1<<6); // atapi device options |= (mode==ATA_MODE_PIO32?1:0<<7); bios_dsk->dpte.iobase1 = iobase1; bios_dsk->dpte.iobase2 = iobase2; bios_dsk->dpte.prefix = (0xe | (device % 2))<<4; bios_dsk->dpte.unused = 0xcb; bios_dsk->dpte.irq = irq; bios_dsk->dpte.blkcount = 1 ; bios_dsk->dpte.dma = 0; bios_dsk->dpte.pio = 0; bios_dsk->dpte.options = options; bios_dsk->dpte.reserved = 0; bios_dsk->dpte.revision = 0x11; checksum = 0; for (i = 0; i < 15; ++i) checksum += read_byte(ebda_seg, (uint16_t)&EbdaData->bdisk.dpte + i); checksum = -checksum; bios_dsk->dpte.checksum = checksum; } // EDD 3.x if(size >= 0x42) { uint8_t channel, iface, checksum, i; uint16_t iobase1; channel = device / 2; iface = bios_dsk->channels[channel].iface; iobase1 = bios_dsk->channels[channel].iobase1; dpt->size = 0x42; dpt->key = 0xbedd; dpt->dpi_length = 0x24; dpt->reserved1 = 0; dpt->reserved2 = 0; if (iface == ATA_IFACE_ISA) { dpt->host_bus[0] = 'I'; dpt->host_bus[1] = 'S'; dpt->host_bus[2] = 'A'; dpt->host_bus[3] = ' '; } else { // FIXME PCI } dpt->iface_type[0] = 'A'; dpt->iface_type[1] = 'T'; dpt->iface_type[2] = 'A'; dpt->iface_type[3] = ' '; dpt->iface_type[4] = ' '; dpt->iface_type[5] = ' '; dpt->iface_type[6] = ' '; dpt->iface_type[7] = ' '; if (iface == ATA_IFACE_ISA) { ((uint16_t __far *)dpt->iface_path)[0] = iobase1; ((uint16_t __far *)dpt->iface_path)[1] = 0; ((uint32_t __far *)dpt->iface_path)[1] = 0; } else { // FIXME PCI } ((uint16_t __far *)dpt->device_path)[0] = device & 1; ((uint16_t __far *)dpt->device_path)[1] = 0; ((uint32_t __far *)dpt->device_path)[1] = 0; checksum = 0; for (i = 30; i < 64; ++i) checksum += ((uint8_t __far *)dpt)[i]; checksum = -checksum; dpt->checksum = checksum; } goto int13_success; break; case 0x49: // IBM/MS extended media change // always send changed ?? SET_AH(06); goto int13_fail_nostatus; break; case 0x4e: // // IBM/MS set hardware configuration // DMA, prefetch, PIO maximum not supported switch (GET_AL()) { case 0x01: case 0x03: case 0x04: case 0x06: goto int13_success; break; default : goto int13_fail; } break; // all those functions return unimplemented case 0x02: /* read sectors */ case 0x04: /* verify sectors */ case 0x08: /* read disk drive parameters */ case 0x0a: /* read disk sectors with ECC */ case 0x0b: /* write disk sectors with ECC */ case 0x18: /* set media type for format */ case 0x50: // ? - send packet command default: BX_INFO("%s: unsupported AH=%02x\n", __func__, GET_AH()); goto int13_fail; break; } int13_fail: SET_AH(0x01); // defaults to invalid function in AH or invalid parameter int13_fail_noah: SET_DISK_RET_STATUS(GET_AH()); int13_fail_nostatus: SET_CF(); // error occurred return; int13_success: SET_AH(0x00); // no error int13_success_noah: SET_DISK_RET_STATUS(0x00); CLEAR_CF(); // no error return; } // --------------------------------------------------------------------------- // End of int13 for cdrom // ---------------------------------------------------------------------------