struct drives_s Drives VAR16VISIBLE;
+struct drive_s *
+getDrive(u8 exttype, u8 extdriveoffset)
+{
+ // basic check : device has to be defined
+ if (extdriveoffset >= ARRAY_SIZE(Drives.idmap[0]))
+ return NULL;
+
+ // Get the ata channel
+ u8 driveid = GET_GLOBAL(Drives.idmap[exttype][extdriveoffset]);
+
+ // basic check : device has to be valid
+ if (driveid >= ARRAY_SIZE(Drives.drives))
+ return NULL;
+
+ return &Drives.drives[driveid];
+}
+
+struct drive_s *
+allocDrive()
+{
+ int driveid = Drives.drivecount;
+ if (driveid >= ARRAY_SIZE(Drives.drives))
+ return NULL;
+ Drives.drivecount++;
+ struct drive_s *drive_g = &Drives.drives[driveid];
+ memset(drive_g, 0, sizeof(*drive_g));
+ return drive_g;
+}
+
/****************************************************************
* Disk geometry translation
****************************************************************/
static u8
-get_translation(int driveid)
+get_translation(struct drive_s *drive_g)
{
- u8 type = GET_GLOBAL(Drives.drives[driveid].type);
+ u8 type = GET_GLOBAL(drive_g->type);
if (! CONFIG_COREBOOT && type == DTYPE_ATA) {
// Emulators pass in the translation info via nvram.
- u8 ataid = GET_GLOBAL(Drives.drives[driveid].cntl_id);
+ u8 ataid = GET_GLOBAL(drive_g->cntl_id);
u8 channel = ataid / 2;
u8 translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2);
translation >>= 2 * (ataid % 4);
}
// On COREBOOT, use a heuristic to determine translation type.
- u16 heads = GET_GLOBAL(Drives.drives[driveid].pchs.heads);
- u16 cylinders = GET_GLOBAL(Drives.drives[driveid].pchs.cylinders);
- u16 spt = GET_GLOBAL(Drives.drives[driveid].pchs.spt);
+ u16 heads = GET_GLOBAL(drive_g->pchs.heads);
+ u16 cylinders = GET_GLOBAL(drive_g->pchs.cylinders);
+ u16 spt = GET_GLOBAL(drive_g->pchs.spt);
if (cylinders <= 1024 && heads <= 16 && spt <= 63)
return TRANSLATION_NONE;
}
void
-setup_translation(int driveid)
+setup_translation(struct drive_s *drive_g)
{
- u8 translation = get_translation(driveid);
- SET_GLOBAL(Drives.drives[driveid].translation, translation);
+ u8 translation = get_translation(drive_g);
+ SET_GLOBAL(drive_g->translation, translation);
- u8 ataid = GET_GLOBAL(Drives.drives[driveid].cntl_id);
+ u8 ataid = GET_GLOBAL(drive_g->cntl_id);
u8 channel = ataid / 2;
u8 slave = ataid % 2;
- u16 heads = GET_GLOBAL(Drives.drives[driveid].pchs.heads);
- u16 cylinders = GET_GLOBAL(Drives.drives[driveid].pchs.cylinders);
- u16 spt = GET_GLOBAL(Drives.drives[driveid].pchs.spt);
- u64 sectors = GET_GLOBAL(Drives.drives[driveid].sectors);
+ u16 heads = GET_GLOBAL(drive_g->pchs.heads);
+ u16 cylinders = GET_GLOBAL(drive_g->pchs.cylinders);
+ u16 spt = GET_GLOBAL(drive_g->pchs.spt);
+ u64 sectors = GET_GLOBAL(drive_g->sectors);
+ const char *desc = NULL;
- dprintf(1, "ata%d-%d: PCHS=%u/%d/%d translation="
- , channel, slave, cylinders, heads, spt);
switch (translation) {
+ default:
case TRANSLATION_NONE:
- dprintf(1, "none");
+ desc = "none";
break;
case TRANSLATION_LBA:
- dprintf(1, "lba");
+ desc = "lba";
spt = 63;
if (sectors > 63*255*1024) {
heads = 255;
cylinders = sect / heads;
break;
case TRANSLATION_RECHS:
- dprintf(1, "r-echs");
+ desc = "r-echs";
// Take care not to overflow
if (heads==16) {
if (cylinders>61439)
// then go through the large bitshift process
case TRANSLATION_LARGE:
if (translation == TRANSLATION_LARGE)
- dprintf(1, "large");
+ desc = "large";
while (cylinders > 1024) {
cylinders >>= 1;
heads <<= 1;
// clip to 1024 cylinders in lchs
if (cylinders > 1024)
cylinders = 1024;
- dprintf(1, " LCHS=%d/%d/%d\n", cylinders, heads, spt);
-
- SET_GLOBAL(Drives.drives[driveid].lchs.heads, heads);
- SET_GLOBAL(Drives.drives[driveid].lchs.cylinders, cylinders);
- SET_GLOBAL(Drives.drives[driveid].lchs.spt, spt);
+ dprintf(1, "ata%d-%d: PCHS=%u/%d/%d translation=%s LCHS=%d/%d/%d\n"
+ , channel, slave
+ , drive_g->pchs.cylinders, drive_g->pchs.heads, drive_g->pchs.spt
+ , desc
+ , cylinders, heads, spt);
+
+ SET_GLOBAL(drive_g->lchs.heads, heads);
+ SET_GLOBAL(drive_g->lchs.cylinders, cylinders);
+ SET_GLOBAL(drive_g->lchs.spt, spt);
}
// Fill in Fixed Disk Parameter Table (located in ebda).
static void
-fill_fdpt(int driveid)
+fill_fdpt(struct drive_s *drive_g, int hdid)
{
- if (driveid > 1)
+ if (hdid > 1)
return;
- u16 nlc = GET_GLOBAL(Drives.drives[driveid].lchs.cylinders);
- u16 nlh = GET_GLOBAL(Drives.drives[driveid].lchs.heads);
- u16 nlspt = GET_GLOBAL(Drives.drives[driveid].lchs.spt);
+ u16 nlc = GET_GLOBAL(drive_g->lchs.cylinders);
+ u16 nlh = GET_GLOBAL(drive_g->lchs.heads);
+ u16 nlspt = GET_GLOBAL(drive_g->lchs.spt);
- u16 npc = GET_GLOBAL(Drives.drives[driveid].pchs.cylinders);
- u16 nph = GET_GLOBAL(Drives.drives[driveid].pchs.heads);
- u16 npspt = GET_GLOBAL(Drives.drives[driveid].pchs.spt);
+ u16 npc = GET_GLOBAL(drive_g->pchs.cylinders);
+ u16 nph = GET_GLOBAL(drive_g->pchs.heads);
+ u16 npspt = GET_GLOBAL(drive_g->pchs.spt);
- struct fdpt_s *fdpt = &get_ebda_ptr()->fdpt[driveid];
+ struct fdpt_s *fdpt = &get_ebda_ptr()->fdpt[hdid];
fdpt->precompensation = 0xffff;
fdpt->drive_control_byte = 0xc0 | ((nph > 8) << 3);
fdpt->landing_zone = npc;
// Checksum structure.
fdpt->checksum -= checksum(fdpt, sizeof(*fdpt));
- if (driveid == 0)
+ if (hdid == 0)
SET_IVT(0x41, SEGOFF(get_ebda_seg(), offsetof(
struct extended_bios_data_area_s, fdpt[0])));
else
// Map a drive (that was registered via add_bcv_hd)
void
-map_hd_drive(int driveid)
+map_hd_drive(struct drive_s *drive_g)
{
// fill hdidmap
u8 hdcount = GET_BDA(hdcount);
if (hdcount >= ARRAY_SIZE(Drives.idmap[0]))
return;
- dprintf(3, "Mapping hd driveid %d to %d\n", driveid, hdcount);
+ dprintf(3, "Mapping hd drive %p to %d\n", drive_g, hdcount);
+ int driveid = drive_g - Drives.drives;
SET_GLOBAL(Drives.idmap[EXTTYPE_HD][hdcount], driveid);
SET_BDA(hdcount, hdcount + 1);
// Fill "fdpt" structure.
- fill_fdpt(hdcount);
+ fill_fdpt(drive_g, hdcount);
+}
+
+// Find spot to add a drive
+static void
+add_ordered_drive(u8 *idmap, u8 *count, struct drive_s *drive_g)
+{
+ if (*count >= ARRAY_SIZE(Drives.idmap[0])) {
+ dprintf(1, "No room to map drive %p\n", drive_g);
+ return;
+ }
+ u8 *pos = &idmap[*count];
+ *count = *count + 1;
+ if (CONFIG_THREADS) {
+ // Add to idmap with assured drive order.
+ u8 *end = pos;
+ for (;;) {
+ u8 *prev = pos - 1;
+ if (prev < idmap)
+ break;
+ struct drive_s *prevdrive = &Drives.drives[*prev];
+ if (prevdrive->type < drive_g->type
+ || (prevdrive->type == drive_g->type
+ && prevdrive->cntl_id < drive_g->cntl_id))
+ break;
+ pos--;
+ }
+ if (pos != end)
+ memmove(pos+1, pos, (void*)end-(void*)pos);
+ }
+ *pos = drive_g - Drives.drives;
}
// Map a cd
void
-map_cd_drive(int driveid)
+map_cd_drive(struct drive_s *drive_g)
{
- // fill cdidmap
- u8 cdcount = GET_GLOBAL(Drives.cdcount);
- if (cdcount >= ARRAY_SIZE(Drives.idmap[0]))
- return;
- dprintf(3, "Mapping cd driveid %d to %d\n", driveid, cdcount);
- SET_GLOBAL(Drives.idmap[EXTTYPE_CD][cdcount], driveid);
- SET_GLOBAL(Drives.cdcount, cdcount+1);
+ dprintf(3, "Mapping cd drive %p\n", drive_g);
+ add_ordered_drive(Drives.idmap[EXTTYPE_CD], &Drives.cdcount, drive_g);
}
// Map a floppy
void
-map_floppy_drive(int driveid)
+map_floppy_drive(struct drive_s *drive_g)
{
// fill idmap
- u8 floppycount = GET_GLOBAL(Drives.floppycount);
- if (floppycount >= ARRAY_SIZE(Drives.idmap[0]))
- return;
- dprintf(3, "Mapping floppy driveid %d to %d\n", driveid, floppycount);
- SET_GLOBAL(Drives.idmap[EXTTYPE_FLOPPY][floppycount], driveid);
- floppycount++;
- SET_GLOBAL(Drives.floppycount, floppycount);
+ dprintf(3, "Mapping floppy drive %p\n", drive_g);
+ add_ordered_drive(Drives.idmap[EXTTYPE_FLOPPY], &Drives.floppycount
+ , drive_g);
// Update equipment word bits for floppy
- if (floppycount == 1) {
+ if (Drives.floppycount == 1) {
// 1 drive, ready for boot
SETBITS_BDA(equipment_list_flags, 0x01);
SET_BDA(floppy_harddisk_info, 0x07);
- } else {
+ } else if (Drives.floppycount >= 2) {
// 2 drives, ready for boot
SETBITS_BDA(equipment_list_flags, 0x41);
SET_BDA(floppy_harddisk_info, 0x77);
}
}
+// Show a one line description (without trailing newline) of a drive.
+void
+describe_drive(struct drive_s *drive_g)
+{
+ ASSERT32FLAT();
+ u8 type = GET_GLOBAL(drive_g->type);
+ switch (type) {
+ case DTYPE_FLOPPY:
+ describe_floppy(drive_g);
+ break;
+ case DTYPE_ATA:
+ describe_ata(drive_g);
+ break;
+ case DTYPE_ATAPI:
+ describe_atapi(drive_g);
+ break;
+ case DTYPE_RAMDISK:
+ describe_ramdisk(drive_g);
+ break;
+ default:
+ printf("Unknown");
+ break;
+ }
+}
+
/****************************************************************
* 16bit calling interface
****************************************************************/
// Execute a disk_op request.
-static int
+int
process_op(struct disk_op_s *op)
{
- u8 type = GET_GLOBAL(Drives.drives[op->driveid].type);
+ u8 type = GET_GLOBAL(op->drive_g->type);
switch (type) {
case DTYPE_FLOPPY:
return process_floppy_op(op);
return process_atapi_op(op);
case DTYPE_RAMDISK:
return process_ramdisk_op(op);
+ case DTYPE_CDEMU:
+ return process_cdemu_op(op);
default:
op->count = 0;
return DISK_RET_EPARAM;
, op_seg, op_far
, sizeof(dop));
- dprintf(DEBUG_HDL_13, "disk_op d=%d lba=%d buf=%p count=%d cmd=%d\n"
- , dop.driveid, (u32)dop.lba, dop.buf_fl
+ dprintf(DEBUG_HDL_13, "disk_op d=%p lba=%d buf=%p count=%d cmd=%d\n"
+ , dop.drive_g, (u32)dop.lba, dop.buf_fl
, dop.count, dop.command);
- irq_enable();
-
int status = process_op(&dop);
- irq_disable();
-
// Update count with total sectors transferred.
SET_FARVAR(op_seg, op_far->count, dop.count);
projects / seabios.git / blobdiff