1 // Low level ATA disk access
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "types.h" // u8
9 #include "ioport.h" // inb
10 #include "util.h" // dprintf
11 #include "cmos.h" // inb_cmos
12 #include "pic.h" // enable_hwirq
13 #include "biosvar.h" // GET_EBDA
14 #include "pci.h" // pci_find_class
15 #include "pci_ids.h" // PCI_CLASS_STORAGE_OTHER
16 #include "pci_regs.h" // PCI_INTERRUPT_LINE
17 #include "boot.h" // add_bcv_hd
18 #include "disk.h" // struct ata_s
19 #include "atabits.h" // ATA_CB_STAT
21 #define IDE_SECTOR_SIZE 512
22 #define CDROM_SECTOR_SIZE 2048
24 #define IDE_TIMEOUT 32000 //32 seconds max for IDE ops
26 struct ata_s ATA VAR16_32;
29 /****************************************************************
31 ****************************************************************/
33 // Wait for the specified ide state
35 await_ide(u8 mask, u8 flags, u16 base, u16 timeout)
37 u64 end = calc_future_tsc(timeout);
39 u8 status = inb(base+ATA_CB_STAT);
40 if ((status & mask) == flags)
42 if (rdtscll() > end) {
43 dprintf(1, "IDE time out\n");
49 // Wait for the device to be not-busy.
51 await_not_bsy(u16 base)
53 return await_ide(ATA_CB_STAT_BSY, 0, base, IDE_TIMEOUT);
56 // Wait for the device to be ready.
60 return await_ide(ATA_CB_STAT_RDY, ATA_CB_STAT_RDY, base, IDE_TIMEOUT);
63 // Wait for ide state - pauses for one ata cycle first.
65 pause_await_not_bsy(u16 iobase1, u16 iobase2)
67 // Wait one PIO transfer cycle.
68 inb(iobase2 + ATA_CB_ASTAT);
70 return await_not_bsy(iobase1);
73 // Wait for ide state - pause for 400ns first.
75 ndelay_await_not_bsy(u16 iobase1)
78 return await_not_bsy(iobase1);
83 ata_reset(int driveid)
85 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
86 u8 channel = ataid / 2;
88 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
89 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
91 dprintf(6, "ata_reset driveid=%d\n", driveid);
93 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC);
95 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
98 // wait for device to become not busy.
99 int status = await_not_bsy(iobase1);
104 u64 end = calc_future_tsc(IDE_TIMEOUT);
106 outb(ATA_CB_DH_DEV1, iobase1 + ATA_CB_DH);
107 status = ndelay_await_not_bsy(iobase1);
110 if (inb(iobase1 + ATA_CB_DH) == ATA_CB_DH_DEV1)
112 // Change drive request failed to take effect - retry.
113 if (rdtscll() > end) {
114 dprintf(1, "ata_reset slave time out\n");
120 // On a user-reset request, wait for RDY if it is an ATA device.
121 u8 type=GET_GLOBAL(ATA.devices[driveid].type);
122 if (type == DTYPE_ATA)
123 status = await_rdy(iobase1);
127 outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
129 dprintf(6, "ata_reset exit status=%x\n", status);
135 // Read the status from controller
136 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
137 u8 channel = ataid / 2;
138 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
139 u8 status = inb(iobase1 + ATA_CB_STAT);
140 return (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY;
144 process_ata_misc_op(struct disk_op_s *op)
146 switch (op->command) {
150 ata_reset(op->driveid);
153 return isready(op->driveid);
158 /****************************************************************
160 ****************************************************************/
162 struct ata_pio_command {
177 // Send an ata command to the drive.
179 send_cmd(int driveid, struct ata_pio_command *cmd)
181 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
182 u8 channel = ataid / 2;
183 u8 slave = ataid % 2;
184 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
185 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
187 // Disable interrupts
188 outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
191 int status = await_not_bsy(iobase1);
194 u8 newdh = ((cmd->device & ~ATA_CB_DH_DEV1)
195 | (slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0));
196 u8 olddh = inb(iobase1 + ATA_CB_DH);
197 outb(newdh, iobase1 + ATA_CB_DH);
198 if ((olddh ^ newdh) & (1<<4)) {
199 // Was a device change - wait for device to become not busy.
200 status = ndelay_await_not_bsy(iobase1);
205 if (cmd->command & 0x04) {
206 outb(0x00, iobase1 + ATA_CB_FR);
207 outb(cmd->sector_count2, iobase1 + ATA_CB_SC);
208 outb(cmd->lba_low2, iobase1 + ATA_CB_SN);
209 outb(cmd->lba_mid2, iobase1 + ATA_CB_CL);
210 outb(cmd->lba_high2, iobase1 + ATA_CB_CH);
212 outb(cmd->feature, iobase1 + ATA_CB_FR);
213 outb(cmd->sector_count, iobase1 + ATA_CB_SC);
214 outb(cmd->lba_low, iobase1 + ATA_CB_SN);
215 outb(cmd->lba_mid, iobase1 + ATA_CB_CL);
216 outb(cmd->lba_high, iobase1 + ATA_CB_CH);
217 outb(cmd->command, iobase1 + ATA_CB_CMD);
219 status = ndelay_await_not_bsy(iobase1);
223 if (status & ATA_CB_STAT_ERR) {
224 dprintf(6, "send_cmd : read error (status=%02x err=%02x)\n"
225 , status, inb(iobase1 + ATA_CB_ERR));
228 if (!(status & ATA_CB_STAT_DRQ)) {
229 dprintf(6, "send_cmd : DRQ not set (status %02x)\n", status);
237 /****************************************************************
239 ****************************************************************/
241 // Transfer 'op->count' blocks (of 'blocksize' bytes) to/from drive
244 ata_transfer(struct disk_op_s *op, int iswrite, int blocksize)
246 dprintf(16, "ata_transfer id=%d write=%d count=%d bs=%d buf=%p\n"
247 , op->driveid, iswrite, op->count, blocksize, op->buf_fl);
249 u8 ataid = GET_GLOBAL(ATA.devices[op->driveid].cntl_id);
250 u8 channel = ataid / 2;
251 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
252 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
253 int count = op->count;
254 void *buf_fl = op->buf_fl;
258 // Write data to controller
259 dprintf(16, "Write sector id=%d dest=%p\n", op->driveid, buf_fl);
260 if (CONFIG_ATA_PIO32)
261 outsl_fl(iobase1, buf_fl, blocksize / 4);
263 outsw_fl(iobase1, buf_fl, blocksize / 2);
265 // Read data from controller
266 dprintf(16, "Read sector id=%d dest=%p\n", op->driveid, buf_fl);
267 if (CONFIG_ATA_PIO32)
268 insl_fl(iobase1, buf_fl, blocksize / 4);
270 insw_fl(iobase1, buf_fl, blocksize / 2);
274 status = pause_await_not_bsy(iobase1, iobase2);
284 status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR);
285 if (status != ATA_CB_STAT_DRQ) {
286 dprintf(6, "ata_transfer : more sectors left (status %02x)\n"
293 status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ
296 status &= ~ATA_CB_STAT_DF;
298 dprintf(6, "ata_transfer : no sectors left (status %02x)\n", status);
303 outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
308 /****************************************************************
309 * ATA hard drive functions
310 ****************************************************************/
312 // Read/write count blocks from a harddrive.
314 ata_cmd_data(struct disk_op_s *op, int iswrite, int command)
318 struct ata_pio_command cmd;
319 memset(&cmd, 0, sizeof(cmd));
321 cmd.command = command;
322 if (op->count >= (1<<8) || lba + op->count >= (1<<28)) {
323 cmd.sector_count2 = op->count >> 8;
324 cmd.lba_low2 = lba >> 24;
325 cmd.lba_mid2 = lba >> 32;
326 cmd.lba_high2 = lba >> 40;
333 cmd.sector_count = op->count;
335 cmd.lba_mid = lba >> 8;
336 cmd.lba_high = lba >> 16;
337 cmd.device = ((lba >> 24) & 0xf) | ATA_CB_DH_LBA;
339 int ret = send_cmd(op->driveid, &cmd);
342 return ata_transfer(op, iswrite, IDE_SECTOR_SIZE);
346 process_ata_op(struct disk_op_s *op)
348 switch (op->command) {
350 return ata_cmd_data(op, 0, ATA_CMD_READ_SECTORS);
352 return ata_cmd_data(op, 1, ATA_CMD_WRITE_SECTORS);
354 return process_ata_misc_op(op);
359 /****************************************************************
361 ****************************************************************/
363 // Low-level atapi command transmit function.
365 send_atapi_cmd(int driveid, u8 *cmdbuf, u8 cmdlen, u16 blocksize)
367 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
368 u8 channel = ataid / 2;
369 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
370 u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
372 struct ata_pio_command cmd;
373 cmd.sector_count = 0;
376 cmd.lba_mid = blocksize;
377 cmd.lba_high = blocksize >> 8;
379 cmd.command = ATA_CMD_PACKET;
381 int ret = send_cmd(driveid, &cmd);
385 // Send command to device
386 outsw_fl(iobase1, MAKE_FLATPTR(GET_SEG(SS), cmdbuf), cmdlen / 2);
388 int status = pause_await_not_bsy(iobase1, iobase2);
392 if (status & ATA_CB_STAT_ERR) {
393 u8 err = inb(iobase1 + ATA_CB_ERR);
396 dprintf(6, "send_atapi_cmd : read error (status=%02x err=%02x)\n"
400 if (!(status & ATA_CB_STAT_DRQ)) {
401 dprintf(6, "send_atapi_cmd : DRQ not set (status %02x)\n", status);
408 // Read sectors from the cdrom.
410 cdrom_read(struct disk_op_s *op)
413 memset(atacmd, 0, sizeof(atacmd));
414 atacmd[0]=0x28; // READ command
415 atacmd[7]=(op->count & 0xff00) >> 8; // Sectors
416 atacmd[8]=(op->count & 0x00ff);
417 atacmd[2]=(op->lba & 0xff000000) >> 24; // LBA
418 atacmd[3]=(op->lba & 0x00ff0000) >> 16;
419 atacmd[4]=(op->lba & 0x0000ff00) >> 8;
420 atacmd[5]=(op->lba & 0x000000ff);
422 int ret = send_atapi_cmd(op->driveid, atacmd, sizeof(atacmd)
423 , CDROM_SECTOR_SIZE);
427 return ata_transfer(op, 0, CDROM_SECTOR_SIZE);
431 process_atapi_op(struct disk_op_s *op)
433 switch (op->command) {
435 return cdrom_read(op);
437 return process_ata_misc_op(op);
441 // Send a simple atapi command to a drive.
443 ata_cmd_packet(int driveid, u8 *cmdbuf, u8 cmdlen
444 , u32 length, void *buf_fl)
446 int ret = send_atapi_cmd(driveid, cmdbuf, cmdlen, length);
450 struct disk_op_s dop;
451 memset(&dop, 0, sizeof(dop));
452 dop.driveid = driveid;
456 return ata_transfer(&dop, 0, length);
460 /****************************************************************
461 * Disk geometry translation
462 ****************************************************************/
465 get_translation(int driveid)
467 if (! CONFIG_COREBOOT) {
468 // Emulators pass in the translation info via nvram.
469 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
470 u8 channel = ataid / 2;
471 u8 translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2);
472 translation >>= 2 * (ataid % 4);
477 // On COREBOOT, use a heuristic to determine translation type.
478 u16 heads = GET_GLOBAL(ATA.devices[driveid].pchs.heads);
479 u16 cylinders = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders);
480 u16 spt = GET_GLOBAL(ATA.devices[driveid].pchs.spt);
482 if (cylinders <= 1024 && heads <= 16 && spt <= 63)
483 return TRANSLATION_NONE;
484 if (cylinders * heads <= 131072)
485 return TRANSLATION_LARGE;
486 return TRANSLATION_LBA;
490 setup_translation(int driveid)
492 u8 translation = get_translation(driveid);
493 SET_GLOBAL(ATA.devices[driveid].translation, translation);
495 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
496 u8 channel = ataid / 2;
497 u8 slave = ataid % 2;
498 u16 heads = GET_GLOBAL(ATA.devices[driveid].pchs.heads);
499 u16 cylinders = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders);
500 u16 spt = GET_GLOBAL(ATA.devices[driveid].pchs.spt);
501 u64 sectors = GET_GLOBAL(ATA.devices[driveid].sectors);
503 dprintf(1, "ata%d-%d: PCHS=%u/%d/%d translation="
504 , channel, slave, cylinders, heads, spt);
505 switch (translation) {
506 case TRANSLATION_NONE:
509 case TRANSLATION_LBA:
512 if (sectors > 63*255*1024) {
517 u32 sect = (u32)sectors / 63;
529 cylinders = sect / heads;
531 case TRANSLATION_RECHS:
532 dprintf(1, "r-echs");
533 // Take care not to overflow
538 cylinders = (u16)((u32)(cylinders)*16/15);
540 // then go through the large bitshift process
541 case TRANSLATION_LARGE:
542 if (translation == TRANSLATION_LARGE)
544 while (cylinders > 1024) {
548 // If we max out the head count
554 // clip to 1024 cylinders in lchs
555 if (cylinders > 1024)
557 dprintf(1, " LCHS=%d/%d/%d\n", cylinders, heads, spt);
559 SET_GLOBAL(ATA.devices[driveid].lchs.heads, heads);
560 SET_GLOBAL(ATA.devices[driveid].lchs.cylinders, cylinders);
561 SET_GLOBAL(ATA.devices[driveid].lchs.spt, spt);
565 /****************************************************************
566 * ATA detect and init
567 ****************************************************************/
569 // Extract the ATA/ATAPI version info.
571 extract_version(u16 *buffer)
573 // Extract ATA/ATAPI version.
574 u16 ataversion = buffer[80];
576 for (version=15; version>0; version--)
577 if (ataversion & (1<<version))
582 // Extract common information from IDENTIFY commands.
584 extract_identify(int driveid, u16 *buffer)
586 dprintf(3, "Identify w0=%x w2=%x\n", buffer[0], buffer[2]);
589 char *model = ATA.devices[driveid].model;
590 int maxsize = ARRAY_SIZE(ATA.devices[driveid].model);
592 for (i=0; i<maxsize/2; i++) {
593 u16 v = buffer[27+i];
595 model[i*2+1] = v & 0xff;
597 model[maxsize-1] = 0x00;
599 // Trim trailing spaces from model name.
600 for (i=maxsize-2; i>0 && model[i] == 0x20; i--)
604 SET_GLOBAL(ATA.devices[driveid].removable, (buffer[0] & 0x80) ? 1 : 0);
608 init_drive_atapi(int driveid, u16 *buffer)
610 // Send an IDENTIFY_DEVICE_PACKET command to device
611 memset(buffer, 0, IDE_SECTOR_SIZE);
612 struct disk_op_s dop;
613 memset(&dop, 0, sizeof(dop));
614 dop.driveid = driveid;
617 dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
618 int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE_PACKET);
622 // Success - setup as ATAPI.
623 extract_identify(driveid, buffer);
624 SET_GLOBAL(ATA.devices[driveid].type, DTYPE_ATAPI);
625 SET_GLOBAL(ATA.devices[driveid].blksize, CDROM_SECTOR_SIZE);
626 SET_GLOBAL(ATA.devices[driveid].sectors, (u64)-1);
627 u8 iscd = ((buffer[0] >> 8) & 0x1f) == 0x05;
629 // Report drive info to user.
630 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
631 u8 channel = ataid / 2;
632 u8 slave = ataid % 2;
633 printf("ata%d-%d: %s ATAPI-%d %s\n", channel, slave
634 , ATA.devices[driveid].model, extract_version(buffer)
635 , (iscd ? "CD-Rom/DVD-Rom" : "Device"));
639 u8 cdcount = GET_GLOBAL(ATA.cdcount);
640 SET_GLOBAL(ATA.idmap[1][cdcount], driveid);
641 SET_GLOBAL(ATA.cdcount, cdcount+1);
648 init_drive_ata(int driveid, u16 *buffer)
650 // Send an IDENTIFY_DEVICE command to device
651 memset(buffer, 0, IDE_SECTOR_SIZE);
652 struct disk_op_s dop;
653 memset(&dop, 0, sizeof(dop));
654 dop.driveid = driveid;
657 dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
658 int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE);
662 // Success - setup as ATA.
663 extract_identify(driveid, buffer);
664 SET_GLOBAL(ATA.devices[driveid].type, DTYPE_ATA);
665 SET_GLOBAL(ATA.devices[driveid].blksize, IDE_SECTOR_SIZE);
667 SET_GLOBAL(ATA.devices[driveid].pchs.cylinders, buffer[1]);
668 SET_GLOBAL(ATA.devices[driveid].pchs.heads, buffer[3]);
669 SET_GLOBAL(ATA.devices[driveid].pchs.spt, buffer[6]);
672 if (buffer[83] & (1 << 10)) // word 83 - lba48 support
673 sectors = *(u64*)&buffer[100]; // word 100-103
675 sectors = *(u32*)&buffer[60]; // word 60 and word 61
676 SET_GLOBAL(ATA.devices[driveid].sectors, sectors);
678 // Setup disk geometry translation.
679 setup_translation(driveid);
681 // Report drive info to user.
682 u8 ataid = GET_GLOBAL(ATA.devices[driveid].cntl_id);
683 u8 channel = ataid / 2;
684 u8 slave = ataid % 2;
685 char *model = ATA.devices[driveid].model;
686 printf("ata%d-%d: %s ATA-%d Hard-Disk ", channel, slave, model
687 , extract_version(buffer));
688 u64 sizeinmb = sectors >> 11;
689 if (sizeinmb < (1 << 16))
690 printf("(%u MiBytes)\n", (u32)sizeinmb);
692 printf("(%u GiBytes)\n", (u32)(sizeinmb >> 10));
694 // Register with bcv system.
695 add_bcv_hd(driveid, model);
701 powerup_await_non_bsy(u16 base, u64 end)
706 status = inb(base+ATA_CB_STAT);
707 if (!(status & ATA_CB_STAT_BSY))
710 if (orstatus == 0xff) {
711 dprintf(1, "powerup IDE floating\n");
714 if (rdtscll() > end) {
715 dprintf(1, "powerup IDE time out\n");
719 dprintf(6, "powerup iobase=%x st=%x\n", base, status);
727 u64 end = calc_future_tsc(IDE_TIMEOUT);
728 int ataid, last_reset_ataid=-1, driveid=0;
729 for (ataid=0; ataid<CONFIG_MAX_ATA_INTERFACES*2; ataid++) {
730 u8 channel = ataid / 2;
731 u8 slave = ataid % 2;
733 u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
738 int status = powerup_await_non_bsy(iobase1, end);
741 u8 newdh = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0;
742 outb(newdh, iobase1+ATA_CB_DH);
744 status = powerup_await_non_bsy(iobase1, end);
748 // Check if ioport registers look valid.
749 outb(newdh, iobase1+ATA_CB_DH);
750 u8 dh = inb(iobase1+ATA_CB_DH);
751 outb(0x55, iobase1+ATA_CB_SC);
752 outb(0xaa, iobase1+ATA_CB_SN);
753 u8 sc = inb(iobase1+ATA_CB_SC);
754 u8 sn = inb(iobase1+ATA_CB_SN);
755 dprintf(6, "ata_detect ataid=%d sc=%x sn=%x dh=%x\n"
756 , ataid, sc, sn, dh);
757 if (sc != 0x55 || sn != 0xaa || dh != newdh)
760 // Prepare new driveid.
761 if (driveid >= ARRAY_SIZE(ATA.devices))
763 memset(&ATA.devices[driveid], 0, sizeof(ATA.devices[0]));
764 ATA.devices[driveid].cntl_id = ataid;
767 if (slave && ataid == last_reset_ataid + 1) {
768 // The drive was just reset - no need to reset it again.
771 last_reset_ataid = ataid;
776 int ret = init_drive_atapi(driveid, buffer);
778 // Found an ATAPI drive.
780 u8 st = inb(iobase1+ATA_CB_STAT);
782 // Status not set - can't be a valid drive.
786 ret = await_rdy(iobase1);
791 ret = init_drive_ata(driveid, buffer);
793 // No ATA drive found
798 u16 resetresult = buffer[93];
799 dprintf(6, "ata_detect resetresult=%04x\n", resetresult);
800 if (!slave && (resetresult & 0xdf61) == 0x4041)
801 // resetresult looks valid and device 0 is responding to
802 // device 1 requests - device 1 must not be present - skip
813 memset(&ATA, 0, sizeof(ATA));
815 // hdidmap and cdidmap init.
817 for (device=0; device < CONFIG_MAX_ATA_DEVICES; device++) {
818 SET_GLOBAL(ATA.idmap[0][device], CONFIG_MAX_ATA_DEVICES);
819 SET_GLOBAL(ATA.idmap[1][device], CONFIG_MAX_ATA_DEVICES);
822 // Scan PCI bus for ATA adapters
825 foreachpci(bdf, max) {
826 if (pci_config_readw(bdf, PCI_CLASS_DEVICE) != PCI_CLASS_STORAGE_IDE)
828 if (count >= ARRAY_SIZE(ATA.channels))
831 u8 irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
832 SET_GLOBAL(ATA.channels[count].irq, irq);
833 SET_GLOBAL(ATA.channels[count].pci_bdf, bdf);
835 u8 prog_if = pci_config_readb(bdf, PCI_CLASS_PROG);
839 port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_0) & ~3;
840 port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_1) & ~3;
845 SET_GLOBAL(ATA.channels[count].iobase1, port1);
846 SET_GLOBAL(ATA.channels[count].iobase2, port2);
847 dprintf(1, "ATA controller %d at %x/%x (dev %x prog_if %x)\n"
848 , count, port1, port2, bdf, prog_if);
852 port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_2) & ~3;
853 port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_3) & ~3;
858 dprintf(1, "ATA controller %d at %x/%x (dev %x prog_if %x)\n"
859 , count, port1, port2, bdf, prog_if);
860 SET_GLOBAL(ATA.channels[count].iobase1, port1);
861 SET_GLOBAL(ATA.channels[count].iobase2, port2);
872 dprintf(3, "init hard drives\n");
876 SET_BDA(disk_control_byte, 0xc0);
878 enable_hwirq(14, entry_76);
882 /****************************************************************
884 ****************************************************************/
886 // Fill in Fixed Disk Parameter Table (located in ebda).
888 fill_fdpt(int driveid)
893 u16 nlc = GET_GLOBAL(ATA.devices[driveid].lchs.cylinders);
894 u16 nlh = GET_GLOBAL(ATA.devices[driveid].lchs.heads);
895 u16 nlspt = GET_GLOBAL(ATA.devices[driveid].lchs.spt);
897 u16 npc = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders);
898 u16 nph = GET_GLOBAL(ATA.devices[driveid].pchs.heads);
899 u16 npspt = GET_GLOBAL(ATA.devices[driveid].pchs.spt);
901 struct fdpt_s *fdpt = &get_ebda_ptr()->fdpt[driveid];
902 fdpt->precompensation = 0xffff;
903 fdpt->drive_control_byte = 0xc0 | ((nph > 8) << 3);
904 fdpt->landing_zone = npc;
905 fdpt->cylinders = nlc;
907 fdpt->sectors = nlspt;
909 if (nlc == npc && nlh == nph && nlspt == npspt)
910 // no logical CHS mapping used, just physical CHS
911 // use Standard Fixed Disk Parameter Table (FDPT)
914 // complies with Phoenix style Translated Fixed Disk Parameter
916 fdpt->phys_cylinders = npc;
917 fdpt->phys_heads = nph;
918 fdpt->phys_sectors = npspt;
919 fdpt->a0h_signature = 0xa0;
921 // Checksum structure.
922 fdpt->checksum -= checksum(fdpt, sizeof(*fdpt));
925 SET_IVT(0x41, get_ebda_seg()
926 , offsetof(struct extended_bios_data_area_s, fdpt[0]));
928 SET_IVT(0x46, get_ebda_seg()
929 , offsetof(struct extended_bios_data_area_s, fdpt[1]));
932 // Map a drive (that was registered via add_bcv_hd)
934 map_drive(int driveid)
937 u8 hdcount = GET_BDA(hdcount);
938 dprintf(3, "Mapping driveid %d to %d\n", driveid, hdcount);
939 SET_GLOBAL(ATA.idmap[0][hdcount], driveid);
940 SET_BDA(hdcount, hdcount + 1);
942 // Fill "fdpt" structure.