| // Low level ATA disk access |
| // |
| // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2002 MandrakeSoft S.A. |
| // |
| // This file may be distributed under the terms of the GNU GPLv3 license. |
| |
| #include "ata.h" // ATA_* |
| #include "types.h" // u8 |
| #include "ioport.h" // inb |
| #include "util.h" // BX_INFO |
| #include "cmos.h" // inb_cmos |
| |
| #define TIMEOUT 0 |
| #define BSY 1 |
| #define NOT_BSY 2 |
| #define NOT_BSY_DRQ 3 |
| #define NOT_BSY_NOT_DRQ 4 |
| #define NOT_BSY_RDY 5 |
| |
| #define IDE_SECTOR_SIZE 512 |
| #define CDROM_SECTOR_SIZE 2048 |
| |
| #define IDE_TIMEOUT 32000u //32 seconds max for IDE ops |
| |
| #define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args) |
| #define DEBUGF(fmt, args...) |
| |
| |
| /**************************************************************** |
| * Helper functions |
| ****************************************************************/ |
| |
| // Wait for the specified ide state |
| static int |
| await_ide(u8 when_done, u16 base, u16 timeout) |
| { |
| u32 time=0, last=0; |
| for (;;) { |
| u8 status = inb(base+ATA_CB_STAT); |
| time++; |
| u8 result = 0; |
| if (when_done == BSY) |
| result = status & ATA_CB_STAT_BSY; |
| else if (when_done == NOT_BSY) |
| result = !(status & ATA_CB_STAT_BSY); |
| else if (when_done == NOT_BSY_DRQ) |
| result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_DRQ); |
| else if (when_done == NOT_BSY_NOT_DRQ) |
| result = !(status & ATA_CB_STAT_BSY) && !(status & ATA_CB_STAT_DRQ); |
| else if (when_done == NOT_BSY_RDY) |
| result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_RDY); |
| |
| if (result) |
| return status; |
| // mod 2048 each 16 ms |
| if (time>>16 != last) { |
| last = time >>16; |
| DEBUGF("await_ide: (TIMEOUT,BSY,!BSY,!BSY_DRQ,!BSY_!DRQ,!BSY_RDY)" |
| " %d time= %d timeout= %d\n" |
| , when_done, time>>11, timeout); |
| } |
| if (status & ATA_CB_STAT_ERR) { |
| DEBUGF("await_ide: ERROR (TIMEOUT,BSY,!BSY,!BSY_DRQ" |
| ",!BSY_!DRQ,!BSY_RDY) %d time= %d timeout= %d\n" |
| , when_done, time>>11, timeout); |
| return -1; |
| } |
| if (timeout == 0 || (time>>11) > timeout) |
| break; |
| } |
| BX_INFO("IDE time out\n"); |
| return -1; |
| } |
| |
| // Wait for ide state - pauses for one ata cycle first. |
| static __always_inline int |
| pause_await_ide(u8 when_done, u16 iobase1, u16 iobase2, u16 timeout) |
| { |
| // Wait one PIO transfer cycle. |
| inb(iobase2 + ATA_CB_ASTAT); |
| |
| return await_ide(when_done, iobase1, timeout); |
| } |
| |
| // Delay for x nanoseconds |
| static void |
| nsleep(u32 delay) |
| { |
| // XXX - how to implement ndelay? |
| while (delay--) |
| nop(); |
| } |
| |
| // Reset a drive |
| void |
| ata_reset(int driveid) |
| { |
| u16 iobase1, iobase2; |
| u8 channel, slave, sn, sc; |
| u8 type; |
| |
| channel = driveid / 2; |
| slave = driveid % 2; |
| |
| iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| |
| // Reset |
| |
| // 8.2.1 (a) -- set SRST in DC |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC); |
| |
| // 8.2.1 (b) -- wait for BSY |
| await_ide(BSY, iobase1, 20); |
| |
| // 8.2.1 (f) -- clear SRST |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC); |
| |
| type=GET_EBDA(ata.devices[driveid].type); |
| if (type != ATA_TYPE_NONE) { |
| |
| // 8.2.1 (g) -- check for sc==sn==0x01 |
| // select device |
| outb(slave?ATA_CB_DH_DEV1:ATA_CB_DH_DEV0, iobase1+ATA_CB_DH); |
| sc = inb(iobase1+ATA_CB_SC); |
| sn = inb(iobase1+ATA_CB_SN); |
| |
| if ( (sc==0x01) && (sn==0x01) ) { |
| if (type == ATA_TYPE_ATA) //ATA |
| await_ide(NOT_BSY_RDY, iobase1, IDE_TIMEOUT); |
| else //ATAPI |
| await_ide(NOT_BSY, iobase1, IDE_TIMEOUT); |
| } |
| |
| // 8.2.1 (h) -- wait for not BSY |
| await_ide(NOT_BSY, iobase1, IDE_TIMEOUT); |
| } |
| |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| } |
| |
| |
| /**************************************************************** |
| * ATA send command |
| ****************************************************************/ |
| |
| struct ata_op_s { |
| u32 lba; |
| void *far_buffer; |
| u16 driveid; |
| u16 count; |
| }; |
| |
| struct ata_pio_command { |
| u8 feature; |
| u8 sector_count; |
| u8 lba_low; |
| u8 lba_mid; |
| u8 lba_high; |
| u8 device; |
| u8 command; |
| |
| u8 sector_count2; |
| u8 lba_low2; |
| u8 lba_mid2; |
| u8 lba_high2; |
| }; |
| |
| // Send an ata command to the drive. |
| static int |
| send_cmd(int driveid, struct ata_pio_command *cmd) |
| { |
| u8 channel = driveid / 2; |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| |
| int status = inb(iobase1 + ATA_CB_STAT); |
| if (status & ATA_CB_STAT_BSY) |
| return 1; |
| |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC); |
| if (cmd->command & 0x04) { |
| outb(0x00, iobase1 + ATA_CB_FR); |
| outb(cmd->sector_count2, iobase1 + ATA_CB_SC); |
| outb(cmd->lba_low2, iobase1 + ATA_CB_SN); |
| outb(cmd->lba_mid2, iobase1 + ATA_CB_CL); |
| outb(cmd->lba_high2, iobase1 + ATA_CB_CH); |
| } |
| outb(cmd->feature, iobase1 + ATA_CB_FR); |
| outb(cmd->sector_count, iobase1 + ATA_CB_SC); |
| outb(cmd->lba_low, iobase1 + ATA_CB_SN); |
| outb(cmd->lba_mid, iobase1 + ATA_CB_CL); |
| outb(cmd->lba_high, iobase1 + ATA_CB_CH); |
| outb(cmd->device, iobase1 + ATA_CB_DH); |
| outb(cmd->command, iobase1 + ATA_CB_CMD); |
| |
| nsleep(400); |
| |
| status = await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT); |
| if (status < 0) |
| return status; |
| |
| if (status & ATA_CB_STAT_ERR) { |
| DEBUGF("send_cmd : read error\n"); |
| return 2; |
| } |
| if (!(status & ATA_CB_STAT_DRQ)) { |
| DEBUGF("send_cmd : DRQ not set (status %02x)\n" |
| , (unsigned) status); |
| return 3; |
| } |
| |
| return 0; |
| } |
| |
| |
| /**************************************************************** |
| * ATA transfers |
| ****************************************************************/ |
| |
| // Read and discard x number of bytes from an io channel. |
| static void |
| insx_discard(int mode, int iobase1, int bytes) |
| { |
| int count, i; |
| if (mode == ATA_MODE_PIO32) { |
| count = bytes / 4; |
| for (i=0; i<count; i++) |
| inl(iobase1); |
| } else { |
| count = bytes / 2; |
| for (i=0; i<count; i++) |
| inw(iobase1); |
| } |
| } |
| |
| // Transfer 'count' blocks (of 'blocksize' bytes) to/from drive |
| // 'driveid'. If 'skipfirst' or 'skiplast' is set then the first |
| // and/or last block may be partially transferred. This function is |
| // inlined because all the callers use different forms and because the |
| // large number of parameters would consume a lot of stack space. |
| static __always_inline int |
| ata_transfer(int driveid, int iswrite, int count, int blocksize |
| , int skipfirst, int skiplast, void *far_buffer) |
| { |
| DEBUGF("ata_transfer id=%d write=%d count=%d bs=%d" |
| " skipf=%d skipl=%d buf=%p\n" |
| , driveid, iswrite, count, blocksize |
| , skipfirst, skiplast, far_buffer); |
| |
| // Reset count of transferred data |
| SET_EBDA(ata.trsfsectors, 0); |
| |
| u8 channel = driveid / 2; |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| u8 mode = GET_EBDA(ata.devices[driveid].mode); |
| int current = 0; |
| int status; |
| for (;;) { |
| int bsize = blocksize; |
| if (skipfirst && current == 0) { |
| insx_discard(mode, iobase1, skipfirst); |
| bsize -= skipfirst; |
| } |
| if (skiplast && current == count-1) |
| bsize -= skiplast; |
| |
| if (iswrite) { |
| // Write data to controller |
| DEBUGF("Write sector id=%d dest=%p\n", driveid, far_buffer); |
| if (mode == ATA_MODE_PIO32) |
| outsl_far(iobase1, far_buffer, bsize / 4); |
| else |
| outsw_far(iobase1, far_buffer, bsize / 2); |
| } else { |
| // Read data from controller |
| DEBUGF("Read sector id=%d dest=%p\n", driveid, far_buffer); |
| if (mode == ATA_MODE_PIO32) |
| insl_far(iobase1, far_buffer, bsize / 4); |
| else |
| insw_far(iobase1, far_buffer, bsize / 2); |
| } |
| far_buffer += bsize; |
| |
| if (skiplast && current == count-1) |
| insx_discard(mode, iobase1, skiplast); |
| |
| status = pause_await_ide(NOT_BSY, iobase1, iobase2, IDE_TIMEOUT); |
| if (status < 0) |
| // Error |
| return status; |
| |
| current++; |
| SET_EBDA(ata.trsfsectors, current); |
| if (current == count) |
| break; |
| status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ |
| | ATA_CB_STAT_ERR); |
| if (status != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ)) { |
| DEBUGF("ata_transfer : more sectors left (status %02x)\n" |
| , (unsigned) status); |
| return 5; |
| } |
| } |
| |
| status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF |
| | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR); |
| if (!iswrite) |
| status &= ~ATA_CB_STAT_DF; |
| if (status != ATA_CB_STAT_RDY ) { |
| DEBUGF("ata_transfer : no sectors left (status %02x)\n" |
| , (unsigned) status); |
| return 4; |
| } |
| |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| return 0; |
| } |
| |
| static noinline int |
| ata_transfer_disk(const struct ata_op_s *op, int iswrite) |
| { |
| return ata_transfer(op->driveid, iswrite, op->count, IDE_SECTOR_SIZE |
| , 0, 0, op->far_buffer); |
| } |
| |
| static noinline int |
| ata_transfer_cdrom(const struct ata_op_s *op) |
| { |
| return ata_transfer(op->driveid, 0, op->count, CDROM_SECTOR_SIZE |
| , 0, 0, op->far_buffer); |
| } |
| |
| static noinline int |
| ata_transfer_emu(const struct ata_op_s *op, int before, int after) |
| { |
| int vcount = op->count * 4 - before - after; |
| int ret = ata_transfer(op->driveid, 0, op->count, CDROM_SECTOR_SIZE |
| , before*512, after*512, op->far_buffer); |
| if (ret) { |
| SET_EBDA(ata.trsfsectors, 0); |
| return ret; |
| } |
| SET_EBDA(ata.trsfsectors, vcount); |
| return 0; |
| } |
| |
| |
| /**************************************************************** |
| * ATA hard drive functions |
| ****************************************************************/ |
| |
| static noinline int |
| send_cmd_disk(const struct ata_op_s *op, u16 command) |
| { |
| u8 slave = op->driveid % 2; |
| u32 lba = op->lba; |
| |
| struct ata_pio_command cmd; |
| memset(&cmd, 0, sizeof(cmd)); |
| |
| cmd.command = command; |
| if (op->count >= (1<<8) || lba + op->count >= (1<<28)) { |
| cmd.sector_count2 = op->count >> 8; |
| cmd.lba_low2 = lba >> 24; |
| cmd.lba_mid2 = 0; |
| cmd.lba_high2 = 0; |
| |
| cmd.command |= 0x04; |
| lba &= 0xffffff; |
| } |
| |
| cmd.feature = 0; |
| cmd.sector_count = op->count; |
| cmd.lba_low = lba; |
| cmd.lba_mid = lba >> 8; |
| cmd.lba_high = lba >> 16; |
| cmd.device = ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) |
| | ((lba >> 24) & 0xf) | ATA_CB_DH_LBA); |
| |
| return send_cmd(op->driveid, &cmd); |
| } |
| |
| // Read/write count blocks from a harddrive. |
| __always_inline int |
| ata_cmd_data(int driveid, u16 command, u32 lba, u16 count, void *far_buffer) |
| { |
| struct ata_op_s op; |
| op.driveid = driveid; |
| op.lba = lba; |
| op.count = count; |
| op.far_buffer = far_buffer; |
| |
| int ret = send_cmd_disk(&op, command); |
| if (ret) |
| return ret; |
| |
| int iswrite = command == ATA_CMD_WRITE_SECTORS; |
| return ata_transfer_disk(&op, iswrite); |
| } |
| |
| |
| /**************************************************************** |
| * ATAPI functions |
| ****************************************************************/ |
| |
| // Low-level atapi command transmit function. |
| static __always_inline int |
| send_atapi_cmd(int driveid, u8 *cmdbuf, u8 cmdlen, u16 blocksize) |
| { |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| |
| struct ata_pio_command cmd; |
| cmd.sector_count = 0; |
| cmd.feature = 0; |
| cmd.lba_low = 0; |
| cmd.lba_mid = blocksize; |
| cmd.lba_high = blocksize >> 8; |
| cmd.device = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0; |
| cmd.command = ATA_CMD_PACKET; |
| |
| int ret = send_cmd(driveid, &cmd); |
| if (ret) |
| return ret; |
| |
| // Send command to device |
| outsw_far(iobase1, MAKE_FARPTR(GET_SEG(SS), (u32)cmdbuf), cmdlen / 2); |
| |
| int status = pause_await_ide(NOT_BSY_DRQ, iobase1, iobase2, IDE_TIMEOUT); |
| if (status < 0) |
| return status; |
| |
| return 0; |
| } |
| |
| // Low-level cdrom read atapi command transmit function. |
| static int |
| send_cmd_cdrom(const struct ata_op_s *op) |
| { |
| u8 atacmd[12]; |
| memset(atacmd, 0, sizeof(atacmd)); |
| |
| atacmd[0]=0x28; // READ command |
| atacmd[7]=(op->count & 0xff00) >> 8; // Sectors |
| atacmd[8]=(op->count & 0x00ff); |
| atacmd[2]=(op->lba & 0xff000000) >> 24; // LBA |
| atacmd[3]=(op->lba & 0x00ff0000) >> 16; |
| atacmd[4]=(op->lba & 0x0000ff00) >> 8; |
| atacmd[5]=(op->lba & 0x000000ff); |
| |
| return send_atapi_cmd(op->driveid, atacmd, sizeof(atacmd) |
| , CDROM_SECTOR_SIZE); |
| } |
| |
| // Read sectors from the cdrom. |
| __always_inline int |
| cdrom_read(int driveid, u32 lba, u32 count, void *far_buffer) |
| { |
| struct ata_op_s op; |
| op.driveid = driveid; |
| op.lba = lba; |
| op.count = count; |
| op.far_buffer = far_buffer; |
| |
| int ret = send_cmd_cdrom(&op); |
| if (ret) |
| return ret; |
| |
| return ata_transfer_cdrom(&op); |
| } |
| |
| // Pretend the cdrom has 512 byte sectors (instead of 2048) and read |
| // sectors. |
| __always_inline int |
| cdrom_read_512(int driveid, u32 vlba, u32 vcount, void *far_buffer) |
| { |
| u32 velba = vlba + vcount - 1; |
| u32 lba = vlba / 4; |
| u32 elba = velba / 4; |
| int count = elba - lba + 1; |
| int before = vlba % 4; |
| int after = 3 - (velba % 4); |
| |
| struct ata_op_s op; |
| op.driveid = driveid; |
| op.lba = lba; |
| op.count = count; |
| op.far_buffer = far_buffer; |
| |
| DEBUGF("cdrom_read_512: id=%d vlba=%d vcount=%d buf=%p lba=%d elba=%d" |
| " count=%d before=%d after=%d\n" |
| , driveid, vlba, vcount, far_buffer, lba, elba |
| , count, before, after); |
| |
| int ret = send_cmd_cdrom(&op); |
| if (ret) |
| return ret; |
| |
| return ata_transfer_emu(&op, before, after); |
| } |
| |
| // Send a simple atapi command to a drive. |
| int |
| ata_cmd_packet(int driveid, u8 *cmdbuf, u8 cmdlen |
| , u32 length, void *far_buffer) |
| { |
| int ret = send_atapi_cmd(driveid, cmdbuf, cmdlen, length); |
| if (ret) |
| return ret; |
| |
| return ata_transfer(driveid, 0, 1, length, 0, 0, far_buffer); |
| } |
| |
| |
| /**************************************************************** |
| * ATA detect and init |
| ****************************************************************/ |
| |
| static void |
| report_model(int driveid, u8 *buffer) |
| { |
| u8 model[41]; |
| |
| // Read model name |
| int i; |
| for (i=0; i<40; i+=2) { |
| model[i] = buffer[i+54+1]; |
| model[i+1] = buffer[i+54]; |
| } |
| |
| // Reformat |
| model[40] = 0x00; |
| for (i=39; i>0; i--) { |
| if (model[i] != 0x20) |
| break; |
| model[i] = 0x00; |
| } |
| |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| // XXX - model on stack not %cs |
| printf("ata%d %s: %s", channel, slave ? " slave" : "master", model); |
| } |
| |
| static u8 |
| get_ata_version(u8 *buffer) |
| { |
| u16 ataversion = *(u16*)&buffer[160]; |
| u8 version; |
| for (version=15; version>0; version--) |
| if (ataversion & (1<<version)) |
| break; |
| return version; |
| } |
| |
| static void |
| init_drive_atapi(int driveid) |
| { |
| SET_EBDA(ata.devices[driveid].type,ATA_TYPE_ATAPI); |
| |
| // Temporary values to do the transfer |
| SET_EBDA(ata.devices[driveid].device,ATA_DEVICE_CDROM); |
| SET_EBDA(ata.devices[driveid].mode, ATA_MODE_PIO16); |
| |
| // Now we send a IDENTIFY command to ATAPI device |
| u8 buffer[0x0200]; |
| memset(buffer, 0, sizeof(buffer)); |
| u16 ret = ata_cmd_data(driveid, ATA_CMD_IDENTIFY_DEVICE_PACKET |
| , 1, 1 |
| , MAKE_FARPTR(GET_SEG(SS), (u32)buffer)); |
| if (ret != 0) |
| BX_PANIC("ata-detect: Failed to detect ATAPI device\n"); |
| |
| u8 type = buffer[1] & 0x1f; |
| u8 removable = (buffer[0] & 0x80) ? 1 : 0; |
| u8 mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16; |
| u16 blksize = CDROM_SECTOR_SIZE; |
| |
| SET_EBDA(ata.devices[driveid].device, type); |
| SET_EBDA(ata.devices[driveid].removable, removable); |
| SET_EBDA(ata.devices[driveid].mode, mode); |
| SET_EBDA(ata.devices[driveid].blksize, blksize); |
| |
| // fill cdidmap |
| u8 cdcount = GET_EBDA(ata.cdcount); |
| SET_EBDA(ata.idmap[1][cdcount], driveid); |
| SET_EBDA(ata.cdcount, ++cdcount); |
| |
| report_model(driveid, buffer); |
| u8 version = get_ata_version(buffer); |
| if (GET_EBDA(ata.devices[driveid].device)==ATA_DEVICE_CDROM) |
| printf(" ATAPI-%d CD-Rom/DVD-Rom\n", version); |
| else |
| printf(" ATAPI-%d Device\n", version); |
| } |
| |
| static void |
| init_drive_ata(int driveid) |
| { |
| SET_EBDA(ata.devices[driveid].type,ATA_TYPE_ATA); |
| |
| // Temporary values to do the transfer |
| SET_EBDA(ata.devices[driveid].device, ATA_DEVICE_HD); |
| SET_EBDA(ata.devices[driveid].mode, ATA_MODE_PIO16); |
| |
| // Now we send a IDENTIFY command to ATA device |
| u8 buffer[0x0200]; |
| memset(buffer, 0, sizeof(buffer)); |
| u16 ret = ata_cmd_data(driveid, ATA_CMD_IDENTIFY_DEVICE |
| , 1, 1 |
| , MAKE_FARPTR(GET_SEG(SS), (u32)buffer)); |
| if (ret) |
| BX_PANIC("ata-detect: Failed to detect ATA device\n"); |
| |
| u8 removable = (buffer[0] & 0x80) ? 1 : 0; |
| u8 mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16; |
| u16 blksize = *(u16*)&buffer[10]; |
| |
| u16 cylinders = *(u16*)&buffer[1*2]; // word 1 |
| u16 heads = *(u16*)&buffer[3*2]; // word 3 |
| u16 spt = *(u16*)&buffer[6*2]; // word 6 |
| |
| u32 sectors = *(u32*)&buffer[60*2]; // word 60 and word 61 |
| |
| SET_EBDA(ata.devices[driveid].device,ATA_DEVICE_HD); |
| SET_EBDA(ata.devices[driveid].removable, removable); |
| SET_EBDA(ata.devices[driveid].mode, mode); |
| SET_EBDA(ata.devices[driveid].blksize, blksize); |
| SET_EBDA(ata.devices[driveid].pchs.heads, heads); |
| SET_EBDA(ata.devices[driveid].pchs.cylinders, cylinders); |
| SET_EBDA(ata.devices[driveid].pchs.spt, spt); |
| SET_EBDA(ata.devices[driveid].sectors, sectors); |
| |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| u8 translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2); |
| u8 shift; |
| for (shift=driveid%4; shift>0; shift--) |
| translation >>= 2; |
| translation &= 0x03; |
| |
| SET_EBDA(ata.devices[driveid].translation, translation); |
| |
| BX_INFO("ata%d-%d: PCHS=%u/%d/%d translation=" |
| , channel, slave, cylinders, heads, spt); |
| switch (translation) { |
| case ATA_TRANSLATION_NONE: |
| BX_INFO("none"); |
| break; |
| case ATA_TRANSLATION_LBA: |
| BX_INFO("lba"); |
| spt = 63; |
| sectors /= 63; |
| heads = sectors / 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 = sectors / heads; |
| break; |
| case ATA_TRANSLATION_RECHS: |
| BX_INFO("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 ATA_TRANSLATION_LARGE: |
| if (translation == ATA_TRANSLATION_LARGE) |
| BX_INFO("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; |
| BX_INFO(" LCHS=%d/%d/%d\n", cylinders, heads, spt); |
| |
| SET_EBDA(ata.devices[driveid].lchs.heads, heads); |
| SET_EBDA(ata.devices[driveid].lchs.cylinders, cylinders); |
| SET_EBDA(ata.devices[driveid].lchs.spt, spt); |
| |
| // fill hdidmap |
| u8 hdcount = GET_EBDA(ata.hdcount); |
| SET_EBDA(ata.idmap[0][hdcount], driveid); |
| SET_EBDA(ata.hdcount, ++hdcount); |
| |
| u32 sizeinmb = GET_EBDA(ata.devices[driveid].sectors); |
| sizeinmb >>= 11; |
| |
| report_model(driveid, buffer); |
| u8 version = get_ata_version(buffer); |
| if (sizeinmb < (1 << 16)) |
| printf(" ATA-%d Hard-Disk (%u MBytes)\n", version, sizeinmb); |
| else |
| printf(" ATA-%d Hard-Disk (%u GBytes)\n", version, sizeinmb >> 10); |
| } |
| |
| static void |
| init_drive_unknown(int driveid) |
| { |
| SET_EBDA(ata.devices[driveid].type,ATA_TYPE_UNKNOWN); |
| |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| printf("ata%d %s: Unknown device\n", channel, slave ? " slave" : "master"); |
| } |
| |
| static void |
| ata_detect() |
| { |
| #if CONFIG_MAX_ATA_INTERFACES > 0 |
| SET_EBDA(ata.channels[0].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[0].iobase1,0x1f0); |
| SET_EBDA(ata.channels[0].iobase2,0x3f0); |
| SET_EBDA(ata.channels[0].irq,14); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 1 |
| SET_EBDA(ata.channels[1].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[1].iobase1,0x170); |
| SET_EBDA(ata.channels[1].iobase2,0x370); |
| SET_EBDA(ata.channels[1].irq,15); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 2 |
| SET_EBDA(ata.channels[2].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[2].iobase1,0x1e8); |
| SET_EBDA(ata.channels[2].iobase2,0x3e0); |
| SET_EBDA(ata.channels[2].irq,12); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 3 |
| SET_EBDA(ata.channels[3].iface,ATA_IFACE_ISA); |
| SET_EBDA(ata.channels[3].iobase1,0x168); |
| SET_EBDA(ata.channels[3].iobase2,0x360); |
| SET_EBDA(ata.channels[3].irq,11); |
| #endif |
| #if CONFIG_MAX_ATA_INTERFACES > 4 |
| #error Please fill the ATA interface informations |
| #endif |
| |
| // Device detection |
| int driveid; |
| for(driveid=0; driveid<CONFIG_MAX_ATA_DEVICES; driveid++) { |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| |
| u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1); |
| u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2); |
| |
| // Disable interrupts |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC); |
| |
| // Look for device |
| outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH); |
| outb(0x55, iobase1+ATA_CB_SC); |
| outb(0xaa, iobase1+ATA_CB_SN); |
| outb(0xaa, iobase1+ATA_CB_SC); |
| outb(0x55, iobase1+ATA_CB_SN); |
| outb(0x55, iobase1+ATA_CB_SC); |
| outb(0xaa, iobase1+ATA_CB_SN); |
| |
| // If we found something |
| u8 sc = inb(iobase1+ATA_CB_SC); |
| u8 sn = inb(iobase1+ATA_CB_SN); |
| |
| if (sc != 0x55 || sn != 0xaa) |
| continue; |
| |
| // reset the channel |
| ata_reset(driveid); |
| |
| // check for ATA or ATAPI |
| outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH); |
| sc = inb(iobase1+ATA_CB_SC); |
| sn = inb(iobase1+ATA_CB_SN); |
| if (sc!=0x01 || sn!=0x01) { |
| init_drive_unknown(driveid); |
| continue; |
| } |
| u8 cl = inb(iobase1+ATA_CB_CL); |
| u8 ch = inb(iobase1+ATA_CB_CH); |
| u8 st = inb(iobase1+ATA_CB_STAT); |
| |
| if (cl==0x14 && ch==0xeb) |
| init_drive_atapi(driveid); |
| else if (cl==0x00 && ch==0x00 && st!=0x00) |
| init_drive_ata(driveid); |
| else if (cl==0xff && ch==0xff) |
| // None |
| continue; |
| else |
| init_drive_unknown(driveid); |
| } |
| |
| // Store the device count |
| SET_BDA(disk_count, GET_EBDA(ata.hdcount)); |
| |
| printf("\n"); |
| |
| // FIXME : should use bios=cmos|auto|disable bits |
| // FIXME : should know about translation bits |
| // FIXME : move hard_drive_post here |
| } |
| |
| static void |
| ata_init() |
| { |
| // hdidmap and cdidmap init. |
| u8 device; |
| for (device=0; device < CONFIG_MAX_ATA_DEVICES; device++) { |
| SET_EBDA(ata.idmap[0][device], CONFIG_MAX_ATA_DEVICES); |
| SET_EBDA(ata.idmap[1][device], CONFIG_MAX_ATA_DEVICES); |
| } |
| } |
| |
| static void |
| fill_hdinfo(int hdnum, u8 typecmos, u8 basecmos) |
| { |
| u8 type = inb_cmos(typecmos); |
| if (type != 47) |
| // XXX - halt |
| return; |
| |
| SET_EBDA(fdpt[hdnum].precompensation, ((inb_cmos(basecmos+4) << 8) |
| | inb_cmos(basecmos+3))); |
| SET_EBDA(fdpt[hdnum].drive_control_byte, inb_cmos(basecmos+5)); |
| SET_EBDA(fdpt[hdnum].landing_zone, ((inb_cmos(basecmos+7) << 8) |
| | inb_cmos(basecmos+6))); |
| u16 cyl = (inb_cmos(basecmos+1) << 8) | inb_cmos(basecmos+0); |
| u8 heads = inb_cmos(basecmos+2); |
| u8 sectors = inb_cmos(basecmos+8); |
| if (cyl < 1024) { |
| // no logical CHS mapping used, just physical CHS |
| // use Standard Fixed Disk Parameter Table (FDPT) |
| SET_EBDA(fdpt[hdnum].cylinders, cyl); |
| SET_EBDA(fdpt[hdnum].heads, heads); |
| SET_EBDA(fdpt[hdnum].sectors, sectors); |
| return; |
| } |
| |
| // complies with Phoenix style Translated Fixed Disk Parameter |
| // Table (FDPT) |
| SET_EBDA(fdpt[hdnum].phys_cylinders, cyl); |
| SET_EBDA(fdpt[hdnum].phys_heads, heads); |
| SET_EBDA(fdpt[hdnum].phys_sectors, sectors); |
| SET_EBDA(fdpt[hdnum].sectors, sectors); |
| SET_EBDA(fdpt[hdnum].a0h_signature, 0xa0); |
| if (cyl > 8192) { |
| cyl >>= 4; |
| heads <<= 4; |
| } else if (cyl > 4096) { |
| cyl >>= 3; |
| heads <<= 3; |
| } else if (cyl > 2048) { |
| cyl >>= 2; |
| heads <<= 2; |
| } |
| SET_EBDA(fdpt[hdnum].cylinders, cyl); |
| SET_EBDA(fdpt[hdnum].heads, heads); |
| u8 *p = MAKE_FARPTR(SEG_EBDA, offsetof(struct extended_bios_data_area_s |
| , fdpt[hdnum])); |
| u8 sum = checksum(p, FIELD_SIZEOF(struct extended_bios_data_area_s |
| , fdpt[hdnum]) - 1); |
| SET_EBDA(fdpt[hdnum].checksum, -sum); |
| } |
| |
| void |
| hard_drive_setup() |
| { |
| outb(0x0a, PORT_HD_DATA); // 0000 1010 = reserved, disable IRQ 14 |
| SET_BDA(disk_count, 1); |
| SET_BDA(disk_control_byte, 0xc0); |
| |
| // move disk geometry data from CMOS to EBDA disk parameter table(s) |
| u8 diskinfo = inb_cmos(CMOS_DISK_DATA); |
| if ((diskinfo & 0xf0) == 0xf0) |
| // Fill EBDA table for hard disk 0. |
| fill_hdinfo(0, CMOS_DISK_DRIVE1_TYPE, CMOS_DISK_DRIVE1_CYL); |
| if ((diskinfo & 0x0f) == 0x0f) |
| // XXX - bochs halts on any other type |
| // Fill EBDA table for hard disk 1. |
| fill_hdinfo(1, CMOS_DISK_DRIVE2_TYPE, CMOS_DISK_DRIVE2_CYL); |
| |
| if (CONFIG_ATA) { |
| ata_init(); |
| ata_detect(); |
| } |
| } |