// Perform read/write/verify using new-style "int13ext" accesses.
static void noinline
extended_access(struct bregs *regs, struct drive_s *drive_gf, u16 command)
{
struct disk_op_s dop;
struct int13ext_s *param_far = (struct int13ext_s*)(regs->si+0);
// Get lba and check.
dop.lba = GET_FARVAR(regs->ds, param_far->lba);
dop.command = command;
dop.drive_gf = drive_gf;
if (dop.lba >= GET_GLOBALFLAT(drive_gf->sectors)) {
warn_invalid(regs);
disk_ret(regs, DISK_RET_EPARAM);
return;
}
dop.buf_fl = SEGOFF_TO_FLATPTR(GET_FARVAR(regs->ds, param_far->data));
dop.count = GET_FARVAR(regs->ds, param_far->count);
if (! dop.count) {
// Nothing to do.
disk_ret(regs, DISK_RET_SUCCESS);
return;
}
int status = send_disk_op(&dop);
SET_FARVAR(regs->ds, param_far->count, dop.count);
disk_ret(regs, status);
}
static void
vbe_104f00(struct bregs *regs)
{
u16 seg = regs->es;
struct vbe_info *info = (void*)(regs->di+0);
if (GET_FARVAR(seg, info->signature) == VBE2_SIGNATURE) {
dprintf(4, "Get VBE Controller: VBE2 Signature found\n");
} else if (GET_FARVAR(seg, info->signature) == VESA_SIGNATURE) {
dprintf(4, "Get VBE Controller: VESA Signature found\n");
} else {
dprintf(4, "Get VBE Controller: Invalid Signature\n");
}
memset_far(seg, info, 0, sizeof(*info));
SET_FARVAR(seg, info->signature, VESA_SIGNATURE);
SET_FARVAR(seg, info->version, 0x0300);
SET_FARVAR(seg, info->oem_string,
SEGOFF(get_global_seg(), (u32)VBE_OEM_STRING));
SET_FARVAR(seg, info->capabilities, GET_GLOBAL(VBE_capabilities));
/* We generate our mode list in the reserved field of the info block */
u16 *destmode = (void*)info->reserved;
SET_FARVAR(seg, info->video_mode, SEGOFF(seg, (u32)destmode));
/* Total memory (in 64k blocks) */
SET_FARVAR(seg, info->total_memory
, GET_GLOBAL(VBE_total_memory) / (64*1024));
SET_FARVAR(seg, info->oem_vendor_string,
SEGOFF(get_global_seg(), (u32)VBE_VENDOR_STRING));
SET_FARVAR(seg, info->oem_product_string,
SEGOFF(get_global_seg(), (u32)VBE_PRODUCT_STRING));
SET_FARVAR(seg, info->oem_revision_string,
SEGOFF(get_global_seg(), (u32)VBE_REVISION_STRING));
/* Fill list of modes */
u16 *last = (void*)&info->reserved[sizeof(info->reserved)];
vgahw_list_modes(seg, destmode, last - 1);
regs->ax = 0x004f;
}
static int
bochsvga_restore_state(u16 seg, u16 *info)
{
u16 en = GET_FARVAR(seg, *info);
info++;
if (!(en & VBE_DISPI_ENABLED)) {
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
return 0;
}
int i;
for (i = VBE_DISPI_INDEX_XRES; i <= VBE_DISPI_INDEX_Y_OFFSET; i++)
if (i == VBE_DISPI_INDEX_ENABLE) {
dispi_write(i, en);
} else {
dispi_write(i, GET_FARVAR(seg, *info));
info++;
}
return 0;
}
static void
dequeue_key(struct bregs *regs, int incr, int extended)
{
yield();
u16 buffer_head;
u16 buffer_tail;
for (;;) {
buffer_head = GET_BDA(kbd_buf_head);
buffer_tail = GET_BDA(kbd_buf_tail);
if (buffer_head != buffer_tail)
break;
if (!incr) {
regs->flags |= F_ZF;
return;
}
yield_toirq();
}
u16 keycode = GET_FARVAR(SEG_BDA, *(u16*)(buffer_head+0));
u8 ascii = keycode & 0xff;
if (!extended) {
// Translate extended keys
if (ascii == 0xe0 && keycode & 0xff00)
keycode &= 0xff00;
else if (keycode == 0xe00d || keycode == 0xe00a)
// Extended enter key
keycode = 0x1c00 | ascii;
else if (keycode == 0xe02f)
// Extended '/' key
keycode = 0x352f;
// Technically, if the ascii value is 0xf0 or if the
// 'scancode' is greater than 0x84 then the key should be
// discarded. However, there seems no harm in passing on the
// extended values in these cases.
}
if (ascii == 0xf0 && keycode & 0xff00)
keycode &= 0xff00;
regs->ax = keycode;
if (!incr) {
regs->flags &= ~F_ZF;
return;
}
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
buffer_head += 2;
if (buffer_head >= buffer_end)
buffer_head = buffer_start;
SET_BDA(kbd_buf_head, buffer_head);
}
static void
dequeue_key(struct bregs *regs, int incr, int extended)
{
yield();
u16 buffer_head;
u16 buffer_tail;
for (;;) {
buffer_head = GET_BDA(kbd_buf_head);
buffer_tail = GET_BDA(kbd_buf_tail);
if (buffer_head != buffer_tail)
break;
if (!incr) {
regs->flags |= F_ZF;
return;
}
yield_toirq();
}
u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0));
u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1));
if ((ascii_code == 0xF0 && scan_code != 0)
|| (ascii_code == 0xE0 && !extended))
ascii_code = 0;
regs->ax = (scan_code << 8) | ascii_code;
if (!incr) {
regs->flags &= ~F_ZF;
return;
}
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
buffer_head += 2;
if (buffer_head >= buffer_end)
buffer_head = buffer_start;
SET_BDA(kbd_buf_head, buffer_head);
}
static void
gfx_planar(struct gfx_op *op)
{
if (!CONFIG_VGA_STDVGA_PORTS)
return;
void *dest_far = (void*)(op->y * op->linelength + op->x / 8);
int plane;
switch (op->op) {
default:
case GO_READ8:
memset(op->pixels, 0, sizeof(op->pixels));
for (plane = 0; plane < 4; plane++) {
stdvga_planar4_plane(plane);
u8 data = GET_FARVAR(SEG_GRAPH, *(u8*)dest_far);
int pixel;
for (pixel=0; pixel<8; pixel++)
op->pixels[pixel] |= ((data>>(7-pixel)) & 1) << plane;
}
break;
case GO_WRITE8:
for (plane = 0; plane<4; plane++) {
stdvga_planar4_plane(plane);
u8 data = 0;
int pixel;
for (pixel=0; pixel<8; pixel++)
data |= ((op->pixels[pixel]>>plane) & 1) << (7-pixel);
SET_FARVAR(SEG_GRAPH, *(u8*)dest_far, data);
}
break;
case GO_MEMSET:
for (plane = 0; plane < 4; plane++) {
stdvga_planar4_plane(plane);
u8 data = (op->pixels[0] & (1<<plane)) ? 0xff : 0x00;
memset_stride(SEG_GRAPH, dest_far, data
, op->xlen / 8, op->linelength, op->ylen);
}
break;
case GO_MEMMOVE: ;
void *src_far = (void*)(op->srcy * op->linelength + op->x / 8);
for (plane = 0; plane < 4; plane++) {
stdvga_planar4_plane(plane);
memmove_stride(SEG_GRAPH, dest_far, src_far
, op->xlen / 8, op->linelength, op->ylen);
}
break;
}
stdvga_planar4_plane(-1);
}
static void
gfx_cga(struct gfx_op *op)
{
int bpp = GET_GLOBAL(op->vmode_g->depth);
void *dest_far = (void*)(op->y / 2 * op->linelength + op->x / 8 * bpp);
switch (op->op) {
default:
case GO_READ8:
if (op->y & 1)
dest_far += 0x2000;
if (bpp == 1) {
u8 data = GET_FARVAR(SEG_CTEXT, *(u8*)dest_far);
int pixel;
for (pixel=0; pixel<8; pixel++)
op->pixels[pixel] = (data >> (7-pixel)) & 1;
} else {
int
cdrom_boot(struct drive_s *drive_g)
{
ASSERT32FLAT();
struct disk_op_s dop;
int cdid = getDriveId(EXTTYPE_CD, drive_g);
memset(&dop, 0, sizeof(dop));
dop.drive_g = drive_g;
if (!dop.drive_g || cdid < 0)
return 1;
int ret = scsi_is_ready(&dop);
if (ret)
dprintf(1, "scsi_is_ready returned %d\n", ret);
// Read the Boot Record Volume Descriptor
u8 buffer[CDROM_SECTOR_SIZE];
dop.lba = 0x11;
dop.count = 1;
dop.buf_fl = buffer;
ret = cdb_read(&dop);
if (ret)
return 3;
// Validity checks
if (buffer[0])
return 4;
if (strcmp((char*)&buffer[1], "CD001\001EL TORITO SPECIFICATION") != 0)
return 5;
// ok, now we calculate the Boot catalog address
u32 lba = *(u32*)&buffer[0x47];
// And we read the Boot Catalog
dop.lba = lba;
dop.count = 1;
ret = cdb_read(&dop);
if (ret)
return 7;
// Validation entry
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
u8 media = buffer[0x21];
CDEmu.media = media;
CDEmu.emulated_drive_gf = dop.drive_g;
u16 boot_segment = *(u16*)&buffer[0x22];
if (!boot_segment)
boot_segment = 0x07C0;
CDEmu.load_segment = boot_segment;
CDEmu.buffer_segment = 0x0000;
u16 nbsectors = *(u16*)&buffer[0x26];
CDEmu.sector_count = nbsectors;
lba = *(u32*)&buffer[0x28];
CDEmu.ilba = lba;
// And we read the image in memory
dop.lba = lba;
dop.count = DIV_ROUND_UP(nbsectors, 4);
dop.buf_fl = MAKE_FLATPTR(boot_segment, 0);
ret = cdb_read(&dop);
if (ret)
return 12;
if (media == 0) {
// No emulation requested - return success.
CDEmu.emulated_extdrive = EXTSTART_CD + cdid;
return 0;
}
// Emulation of a floppy/harddisk requested
if (! CONFIG_CDROM_EMU || !cdemu_drive_gf)
return 13;
// Set emulated drive id and increase bios installed hardware
// number of devices
if (media < 4) {
// Floppy emulation
CDEmu.emulated_extdrive = 0x00;
// XXX - get and set actual floppy count.
set_equipment_flags(0x41, 0x41);
switch (media) {
case 0x01: // 1.2M floppy
CDEmu.lchs.spt = 15;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
case 0x02: // 1.44M floppy
CDEmu.lchs.spt = 18;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
case 0x03: // 2.88M floppy
CDEmu.lchs.spt = 36;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
}
} else {
// Harddrive emulation
CDEmu.emulated_extdrive = 0x80;
SET_BDA(hdcount, GET_BDA(hdcount) + 1);
// Peak at partition table to get chs.
struct mbr_s *mbr = (void*)0;
u8 sptcyl = GET_FARVAR(boot_segment, mbr->partitions[0].last.sptcyl);
u8 cyllow = GET_FARVAR(boot_segment, mbr->partitions[0].last.cyllow);
u8 heads = GET_FARVAR(boot_segment, mbr->partitions[0].last.heads);
CDEmu.lchs.spt = sptcyl & 0x3f;
CDEmu.lchs.cylinders = ((sptcyl<<2)&0x300) + cyllow + 1;
CDEmu.lchs.heads = heads + 1;
}
// everything is ok, so from now on, the emulation is active
CDEmu.active = 0x01;
dprintf(6, "cdemu media=%d\n", media);
return 0;
}
// IBM/MS get drive parameters
static void noinline
disk_1348(struct bregs *regs, struct drive_s *drive_gf)
{
u16 seg = regs->ds;
struct int13dpt_s *param_far = (struct int13dpt_s*)(regs->si+0);
u16 size = GET_FARVAR(seg, param_far->size);
u16 t13 = size == 74;
// Buffer is too small
if (size < 26) {
disk_ret(regs, DISK_RET_EPARAM);
return;
}
// 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 (type == DTYPE_ATA_ATAPI) {
// 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);
SET_FARVAR(seg, param_far->sector_count, (u64)-1);
} 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 ||
(type != DTYPE_ATA && type != DTYPE_ATA_ATAPI &&
type != DTYPE_VIRTIO_BLK && type != DTYPE_VIRTIO_SCSI)) {
disk_ret(regs, DISK_RET_SUCCESS);
return;
}
// EDD 2.x
int bdf;
u16 iobase1 = 0;
u64 device_path = 0;
u8 channel = 0;
SET_FARVAR(seg, param_far->size, 30);
if (type == DTYPE_ATA || type == DTYPE_ATA_ATAPI) {
SET_FARVAR(seg, param_far->dpte, SEGOFF(SEG_LOW, (u32)&DefaultDPTE));
// 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);
iobase1 = GET_GLOBALFLAT(chan_gf->iobase1);
bdf = GET_GLOBALFLAT(chan_gf->pci_bdf);
device_path = slave;
channel = GET_GLOBALFLAT(chan_gf->chanid);
u16 options = 0;
if (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);
} else {
gfx_cga(struct gfx_op *op)
{
int bpp = GET_GLOBAL(op->vmode_g->depth);
void *dest_far = (void*)(op->y / 2 * op->linelength + op->x / 8 * bpp);
switch (op->op) {
default:
case GO_READ8:
if (op->y & 1)
dest_far += 0x2000;
if (bpp == 1) {
u8 data = GET_FARVAR(SEG_CTEXT, *(u8*)dest_far);
int pixel;
for (pixel=0; pixel<8; pixel++)
op->pixels[pixel] = (data >> (7-pixel)) & 1;
} else {
u16 data = GET_FARVAR(SEG_CTEXT, *(u16*)dest_far);
data = be16_to_cpu(data);
int pixel;
for (pixel=0; pixel<8; pixel++)
op->pixels[pixel] = (data >> ((7-pixel)*2)) & 3;
}
break;
case GO_WRITE8:
if (op->y & 1)
dest_far += 0x2000;
if (bpp == 1) {
u8 data = 0;
int pixel;
for (pixel=0; pixel<8; pixel++)
data |= (op->pixels[pixel] & 1) << (7-pixel);
SET_FARVAR(SEG_CTEXT, *(u8*)dest_far, data);