diff options
Diffstat (limited to 'qemu/roms/seabios/src/block.c')
| -rw-r--r-- | qemu/roms/seabios/src/block.c | 628 |
1 files changed, 0 insertions, 628 deletions
diff --git a/qemu/roms/seabios/src/block.c b/qemu/roms/seabios/src/block.c deleted file mode 100644 index 1762e2a33..000000000 --- a/qemu/roms/seabios/src/block.c +++ /dev/null @@ -1,628 +0,0 @@ -// Disk setup and access -// -// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net> -// Copyright (C) 2002 MandrakeSoft S.A. -// -// This file may be distributed under the terms of the GNU LGPLv3 license. - -#include "biosvar.h" // GET_GLOBAL -#include "block.h" // process_op -#include "hw/ata.h" // process_ata_op -#include "hw/ahci.h" // process_ahci_op -#include "hw/blockcmd.h" // cdb_* -#include "hw/esp-scsi.h" // esp_scsi_process_op -#include "hw/lsi-scsi.h" // lsi_scsi_process_op -#include "hw/megasas.h" // megasas_process_op -#include "hw/pci.h" // pci_bdf_to_bus -#include "hw/pvscsi.h" // pvscsi_process_op -#include "hw/rtc.h" // rtc_read -#include "hw/usb-msc.h" // usb_process_op -#include "hw/usb-uas.h" // uas_process_op -#include "hw/virtio-blk.h" // process_virtio_blk_op -#include "hw/virtio-scsi.h" // virtio_scsi_process_op -#include "malloc.h" // malloc_low -#include "output.h" // dprintf -#include "stacks.h" // stack_hop -#include "std/disk.h" // struct dpte_s -#include "string.h" // checksum -#include "util.h" // process_floppy_op - -u8 FloppyCount VARFSEG; -u8 CDCount; -struct drive_s *IDMap[3][BUILD_MAX_EXTDRIVE] VARFSEG; -u8 *bounce_buf_fl VARFSEG; - -struct drive_s * -getDrive(u8 exttype, u8 extdriveoffset) -{ - if (extdriveoffset >= ARRAY_SIZE(IDMap[0])) - return NULL; - return GET_GLOBAL(IDMap[exttype][extdriveoffset]); -} - -int getDriveId(u8 exttype, struct drive_s *drive) -{ - ASSERT32FLAT(); - int i; - for (i = 0; i < ARRAY_SIZE(IDMap[0]); i++) - if (getDrive(exttype, i) == drive) - return i; - return -1; -} - -int create_bounce_buf(void) -{ - if (bounce_buf_fl) - return 0; - - u8 *buf = malloc_low(CDROM_SECTOR_SIZE); - if (!buf) { - warn_noalloc(); - return -1; - } - bounce_buf_fl = buf; - return 0; -} - -/**************************************************************** - * Disk geometry translation - ****************************************************************/ - -static u8 -get_translation(struct drive_s *drive) -{ - u8 type = drive->type; - if (CONFIG_QEMU && type == DTYPE_ATA) { - // Emulators pass in the translation info via nvram. - u8 translation = rtc_read(CMOS_BIOS_DISKTRANSFLAG + drive->cntl_id/4); - translation >>= 2 * (drive->cntl_id % 4); - translation &= 0x03; - return translation; - } - - // Otherwise use a heuristic to determine translation type. - u16 heads = drive->pchs.head; - u16 cylinders = drive->pchs.cylinder; - u16 spt = drive->pchs.sector; - u64 sectors = drive->sectors; - u64 psectors = (u64)heads * cylinders * spt; - if (!heads || !cylinders || !spt || psectors > sectors) - // pchs doesn't look valid - use LBA. - return TRANSLATION_LBA; - - if (cylinders <= 1024 && heads <= 16 && spt <= 63) - return TRANSLATION_NONE; - if (cylinders * heads <= 131072) - return TRANSLATION_LARGE; - return TRANSLATION_LBA; -} - -static void -setup_translation(struct drive_s *drive) -{ - u8 translation = get_translation(drive); - drive->translation = translation; - - u16 heads = drive->pchs.head ; - u16 cylinders = drive->pchs.cylinder; - u16 spt = drive->pchs.sector; - u64 sectors = drive->sectors; - const char *desc = NULL; - - switch (translation) { - default: - case TRANSLATION_NONE: - desc = "none"; - break; - case TRANSLATION_LBA: - desc = "lba"; - spt = 63; - if (sectors > 63*255*1024) { - heads = 255; - cylinders = 1024; - break; - } - u32 sect = (u32)sectors / 63; - heads = sect / 1024; - if (heads>128) - heads = 255; - else if (heads>64) - heads = 128; - else if (heads>32) - heads = 64; - else if (heads>16) - heads = 32; - else - heads = 16; - cylinders = sect / heads; - break; - case TRANSLATION_RECHS: - desc = "r-echs"; - // Take care not to overflow - if (heads==16) { - if (cylinders>61439) - cylinders=61439; - heads=15; - cylinders = (u16)((u32)(cylinders)*16/15); - } - // then go through the large bitshift process - case TRANSLATION_LARGE: - if (translation == TRANSLATION_LARGE) - desc = "large"; - while (cylinders > 1024) { - cylinders >>= 1; - heads <<= 1; - - // If we max out the head count - if (heads > 127) - break; - } - break; - } - // clip to 1024 cylinders in lchs - if (cylinders > 1024) - cylinders = 1024; - dprintf(1, "drive %p: PCHS=%u/%d/%d translation=%s LCHS=%d/%d/%d s=%d\n" - , drive - , drive->pchs.cylinder, drive->pchs.head, drive->pchs.sector - , desc - , cylinders, heads, spt - , (u32)sectors); - - drive->lchs.head = heads; - drive->lchs.cylinder = cylinders; - drive->lchs.sector = spt; -} - - -/**************************************************************** - * Drive mapping - ****************************************************************/ - -// Fill in Fixed Disk Parameter Table (located in ebda). -static void -fill_fdpt(struct drive_s *drive, int hdid) -{ - if (hdid > 1) - return; - - u16 nlc = drive->lchs.cylinder; - u16 nlh = drive->lchs.head; - u16 nls = drive->lchs.sector; - - u16 npc = drive->pchs.cylinder; - u16 nph = drive->pchs.head; - u16 nps = drive->pchs.sector; - - struct fdpt_s *fdpt = &get_ebda_ptr()->fdpt[hdid]; - fdpt->precompensation = 0xffff; - fdpt->drive_control_byte = 0xc0 | ((nph > 8) << 3); - fdpt->landing_zone = npc; - fdpt->cylinders = nlc; - fdpt->heads = nlh; - fdpt->sectors = nls; - - if (nlc != npc || nlh != nph || nls != nps) { - // Logical mapping present - use extended structure. - - // complies with Phoenix style Translated Fixed Disk Parameter - // Table (FDPT) - fdpt->phys_cylinders = npc; - fdpt->phys_heads = nph; - fdpt->phys_sectors = nps; - fdpt->a0h_signature = 0xa0; - - // Checksum structure. - fdpt->checksum -= checksum(fdpt, sizeof(*fdpt)); - } - - if (hdid == 0) - SET_IVT(0x41, SEGOFF(get_ebda_seg(), offsetof( - struct extended_bios_data_area_s, fdpt[0]))); - else - SET_IVT(0x46, SEGOFF(get_ebda_seg(), offsetof( - struct extended_bios_data_area_s, fdpt[1]))); -} - -// Find spot to add a drive -static void -add_drive(struct drive_s **idmap, u8 *count, struct drive_s *drive) -{ - if (*count >= ARRAY_SIZE(IDMap[0])) { - warn_noalloc(); - return; - } - idmap[*count] = drive; - *count = *count + 1; -} - -// Map a hard drive -void -map_hd_drive(struct drive_s *drive) -{ - ASSERT32FLAT(); - struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0); - int hdid = bda->hdcount; - dprintf(3, "Mapping hd drive %p to %d\n", drive, hdid); - add_drive(IDMap[EXTTYPE_HD], &bda->hdcount, drive); - - // Setup disk geometry translation. - setup_translation(drive); - - // Fill "fdpt" structure. - fill_fdpt(drive, hdid); -} - -// Map a cd -void -map_cd_drive(struct drive_s *drive) -{ - ASSERT32FLAT(); - dprintf(3, "Mapping cd drive %p\n", drive); - add_drive(IDMap[EXTTYPE_CD], &CDCount, drive); -} - -// Map a floppy -void -map_floppy_drive(struct drive_s *drive) -{ - ASSERT32FLAT(); - dprintf(3, "Mapping floppy drive %p\n", drive); - add_drive(IDMap[EXTTYPE_FLOPPY], &FloppyCount, drive); - - // Update equipment word bits for floppy - if (FloppyCount == 1) { - // 1 drive, ready for boot - set_equipment_flags(0x41, 0x01); - SET_BDA(floppy_harddisk_info, 0x07); - } else if (FloppyCount >= 2) { - // 2 drives, ready for boot - set_equipment_flags(0x41, 0x41); - SET_BDA(floppy_harddisk_info, 0x77); - } -} - - -/**************************************************************** - * Extended Disk Drive (EDD) get drive parameters - ****************************************************************/ - -// flags for bus_iface field in fill_generic_edd() -#define EDD_ISA 0x01 -#define EDD_PCI 0x02 -#define EDD_BUS_MASK 0x0f -#define EDD_ATA 0x10 -#define EDD_SCSI 0x20 -#define EDD_IFACE_MASK 0xf0 - -// Fill in EDD info -static int -fill_generic_edd(struct segoff_s edd, struct drive_s *drive_gf - , u32 dpte_so, u8 bus_iface, u32 iface_path, u32 device_path) -{ - u16 seg = edd.seg; - struct int13dpt_s *param_far = (void*)(edd.offset+0); - u16 size = GET_FARVAR(seg, param_far->size); - u16 t13 = size == 74; - - // Buffer is too small - if (size < 26) - return DISK_RET_EPARAM; - - // EDD 1.x - - u8 type = GET_GLOBALFLAT(drive_gf->type); - u16 npc = GET_GLOBALFLAT(drive_gf->pchs.cylinder); - u16 nph = GET_GLOBALFLAT(drive_gf->pchs.head); - u16 nps = GET_GLOBALFLAT(drive_gf->pchs.sector); - u64 lba = GET_GLOBALFLAT(drive_gf->sectors); - u16 blksize = GET_GLOBALFLAT(drive_gf->blksize); - - dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n" - , size, type, npc, nph, nps, (u32)lba, blksize); - - SET_FARVAR(seg, param_far->size, 26); - if (lba == (u64)-1) { - // 0x74 = removable, media change, lockable, max values - SET_FARVAR(seg, param_far->infos, 0x74); - SET_FARVAR(seg, param_far->cylinders, 0xffffffff); - SET_FARVAR(seg, param_far->heads, 0xffffffff); - SET_FARVAR(seg, param_far->spt, 0xffffffff); - } else { - if (lba > (u64)nps*nph*0x3fff) { - SET_FARVAR(seg, param_far->infos, 0x00); // geometry is invalid - SET_FARVAR(seg, param_far->cylinders, 0x3fff); - } else { - SET_FARVAR(seg, param_far->infos, 0x02); // geometry is valid - SET_FARVAR(seg, param_far->cylinders, (u32)npc); - } - SET_FARVAR(seg, param_far->heads, (u32)nph); - SET_FARVAR(seg, param_far->spt, (u32)nps); - } - SET_FARVAR(seg, param_far->sector_count, lba); - SET_FARVAR(seg, param_far->blksize, blksize); - - if (size < 30 || !dpte_so) - return DISK_RET_SUCCESS; - - // EDD 2.x - - SET_FARVAR(seg, param_far->size, 30); - SET_FARVAR(seg, param_far->dpte.segoff, dpte_so); - - if (size < 66 || !bus_iface) - return DISK_RET_SUCCESS; - - // EDD 3.x - SET_FARVAR(seg, param_far->key, 0xbedd); - SET_FARVAR(seg, param_far->dpi_length, t13 ? 44 : 36); - SET_FARVAR(seg, param_far->reserved1, 0); - SET_FARVAR(seg, param_far->reserved2, 0); - - const char *host_bus = "ISA "; - if ((bus_iface & EDD_BUS_MASK) == EDD_PCI) { - host_bus = "PCI "; - if (!t13) - // Phoenix v3 spec (pre t13) did not define the PCI channel field - iface_path &= 0x00ffffff; - } - memcpy_far(seg, param_far->host_bus, SEG_BIOS, host_bus - , sizeof(param_far->host_bus)); - SET_FARVAR(seg, param_far->iface_path, iface_path); - - const char *iface_type = "ATA "; - if ((bus_iface & EDD_IFACE_MASK) == EDD_SCSI) - iface_type = "SCSI "; - memcpy_far(seg, param_far->iface_type, SEG_BIOS, iface_type - , sizeof(param_far->iface_type)); - if (t13) { - SET_FARVAR(seg, param_far->t13.device_path[0], device_path); - SET_FARVAR(seg, param_far->t13.device_path[1], 0); - - SET_FARVAR(seg, param_far->t13.checksum - , -checksum_far(seg, (void*)param_far+30, 43)); - } else { - SET_FARVAR(seg, param_far->phoenix.device_path, device_path); - - SET_FARVAR(seg, param_far->phoenix.checksum - , -checksum_far(seg, (void*)param_far+30, 35)); - } - - return DISK_RET_SUCCESS; -} - -// Build an EDD "iface_path" field for a PCI device -static u32 -edd_pci_path(u16 bdf, u8 channel) -{ - return (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8) - | (pci_bdf_to_fn(bdf) << 16) | ((u32)channel << 24)); -} - -struct dpte_s DefaultDPTE VARLOW; - -// EDD info for ATA and ATAPI drives -static int -fill_ata_edd(struct segoff_s edd, struct drive_s *drive_gf) -{ - if (!CONFIG_ATA) - return DISK_RET_EPARAM; - - // Fill in dpte - struct atadrive_s *adrive_gf = container_of( - drive_gf, struct atadrive_s, drive); - struct ata_channel_s *chan_gf = GET_GLOBALFLAT(adrive_gf->chan_gf); - u8 slave = GET_GLOBALFLAT(adrive_gf->slave); - u16 iobase2 = GET_GLOBALFLAT(chan_gf->iobase2); - u8 irq = GET_GLOBALFLAT(chan_gf->irq); - u16 iobase1 = GET_GLOBALFLAT(chan_gf->iobase1); - int bdf = GET_GLOBALFLAT(chan_gf->pci_bdf); - u8 channel = GET_GLOBALFLAT(chan_gf->chanid); - - u16 options = 0; - if (GET_GLOBALFLAT(drive_gf->type) == DTYPE_ATA) { - u8 translation = GET_GLOBALFLAT(drive_gf->translation); - if (translation != TRANSLATION_NONE) { - options |= 1<<3; // CHS translation - if (translation == TRANSLATION_LBA) - options |= 1<<9; - if (translation == TRANSLATION_RECHS) - options |= 3<<9; - } - } else { - // ATAPI - options |= 1<<5; // removable device - options |= 1<<6; // atapi device - } - options |= 1<<4; // lba translation - if (CONFIG_ATA_PIO32) - options |= 1<<7; - - SET_LOW(DefaultDPTE.iobase1, iobase1); - SET_LOW(DefaultDPTE.iobase2, iobase2 + ATA_CB_DC); - SET_LOW(DefaultDPTE.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) - | ATA_CB_DH_LBA)); - SET_LOW(DefaultDPTE.unused, 0xcb); - SET_LOW(DefaultDPTE.irq, irq); - SET_LOW(DefaultDPTE.blkcount, 1); - SET_LOW(DefaultDPTE.dma, 0); - SET_LOW(DefaultDPTE.pio, 0); - SET_LOW(DefaultDPTE.options, options); - SET_LOW(DefaultDPTE.reserved, 0); - SET_LOW(DefaultDPTE.revision, 0x11); - - u8 sum = checksum_far(SEG_LOW, &DefaultDPTE, 15); - SET_LOW(DefaultDPTE.checksum, -sum); - - u32 bustype = EDD_ISA, ifpath = iobase1; - if (bdf >= 0) { - bustype = EDD_PCI; - ifpath = edd_pci_path(bdf, channel); - } - return fill_generic_edd( - edd, drive_gf, SEGOFF(SEG_LOW, (u32)&DefaultDPTE).segoff - , bustype | EDD_ATA, ifpath, slave); -} - -// Fill Extended Disk Drive (EDD) "Get drive parameters" info for a drive -int noinline -fill_edd(struct segoff_s edd, struct drive_s *drive_gf) -{ - switch (GET_GLOBALFLAT(drive_gf->type)) { - case DTYPE_ATA: - case DTYPE_ATA_ATAPI: - return fill_ata_edd(edd, drive_gf); - case DTYPE_VIRTIO_BLK: - case DTYPE_VIRTIO_SCSI: - return fill_generic_edd( - edd, drive_gf, 0xffffffff, EDD_PCI | EDD_SCSI - , edd_pci_path(GET_GLOBALFLAT(drive_gf->cntl_id), 0), 0); - default: - return fill_generic_edd(edd, drive_gf, 0, 0, 0, 0); - } -} - - -/**************************************************************** - * Disk driver dispatch - ****************************************************************/ - -// Fallback handler for command requests not implemented by drivers -int -default_process_op(struct disk_op_s *op) -{ - switch (op->command) { - case CMD_FORMAT: - case CMD_RESET: - case CMD_ISREADY: - case CMD_VERIFY: - case CMD_SEEK: - // Return success if the driver doesn't implement these commands - return DISK_RET_SUCCESS; - default: - return DISK_RET_EPARAM; - } -} - -// Command dispatch for disk drivers that run in both 16bit and 32bit mode -static int -process_op_both(struct disk_op_s *op) -{ - switch (GET_GLOBALFLAT(op->drive_gf->type)) { - case DTYPE_ATA_ATAPI: - return ata_atapi_process_op(op); - case DTYPE_USB: - return usb_process_op(op); - case DTYPE_UAS: - return uas_process_op(op); - case DTYPE_LSI_SCSI: - return lsi_scsi_process_op(op); - case DTYPE_ESP_SCSI: - return esp_scsi_process_op(op); - case DTYPE_MEGASAS: - return megasas_process_op(op); - default: - if (!MODESEGMENT) - return DISK_RET_EPARAM; - // In 16bit mode and driver not found - try in 32bit mode - return call32(process_op_32, MAKE_FLATPTR(GET_SEG(SS), op) - , DISK_RET_EPARAM); - } -} - -// Command dispatch for disk drivers that only run in 32bit mode -int VISIBLE32FLAT -process_op_32(struct disk_op_s *op) -{ - ASSERT32FLAT(); - switch (op->drive_gf->type) { - case DTYPE_VIRTIO_BLK: - return virtio_blk_process_op(op); - case DTYPE_AHCI: - return ahci_process_op(op); - case DTYPE_AHCI_ATAPI: - return ahci_atapi_process_op(op); - case DTYPE_SDCARD: - return sdcard_process_op(op); - case DTYPE_USB_32: - return usb_process_op(op); - case DTYPE_UAS_32: - return uas_process_op(op); - case DTYPE_VIRTIO_SCSI: - return virtio_scsi_process_op(op); - case DTYPE_PVSCSI: - return pvscsi_process_op(op); - default: - return process_op_both(op); - } -} - -// Command dispatch for disk drivers that only run in 16bit mode -static int -process_op_16(struct disk_op_s *op) -{ - ASSERT16(); - switch (GET_GLOBALFLAT(op->drive_gf->type)) { - case DTYPE_FLOPPY: - return floppy_process_op(op); - case DTYPE_ATA: - return ata_process_op(op); - case DTYPE_RAMDISK: - return ramdisk_process_op(op); - case DTYPE_CDEMU: - return cdemu_process_op(op); - default: - return process_op_both(op); - } -} - -// Execute a disk_op_s request. -int -process_op(struct disk_op_s *op) -{ - int ret, origcount = op->count; - if (origcount * GET_GLOBALFLAT(op->drive_gf->blksize) > 64*1024) { - op->count = 0; - return DISK_RET_EBOUNDARY; - } - if (MODESEGMENT) - ret = process_op_16(op); - else - ret = process_op_32(op); - if (ret && op->count == origcount) - // If the count hasn't changed on error, assume no data transferred. - op->count = 0; - return ret; -} - -// Execute a "disk_op_s" request - this runs on the extra stack. -static int -__send_disk_op(struct disk_op_s *op_far, u16 op_seg) -{ - struct disk_op_s dop; - memcpy_far(GET_SEG(SS), &dop - , op_seg, op_far - , sizeof(dop)); - - dprintf(DEBUG_HDL_13, "disk_op d=%p lba=%d buf=%p count=%d cmd=%d\n" - , dop.drive_gf, (u32)dop.lba, dop.buf_fl - , dop.count, dop.command); - - int status = process_op(&dop); - - // Update count with total sectors transferred. - SET_FARVAR(op_seg, op_far->count, dop.count); - - return status; -} - -// Execute a "disk_op_s" request by jumping to the extra 16bit stack. -int -send_disk_op(struct disk_op_s *op) -{ - ASSERT16(); - if (! CONFIG_DRIVES) - return -1; - - return stack_hop(__send_disk_op, op, GET_SEG(SS)); -} |