#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...)
-// XXX - lots of redundancy in this file.
+/****************************************************************
+ * 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 the times you're supposed to throw one away
- u16 status = inb(base + ATA_CB_STAT);
for (;;) {
- status = inb(base+ATA_CB_STAT);
+ u8 status = inb(base+ATA_CB_STAT);
time++;
u8 result;
if (when_done == BSY)
result = 0;
if (result)
- return 0;
+ return status;
// mod 2048 each 16 ms
if (time>>16 != last) {
last = time >>16;
, when_done, time>>11, timeout);
return -1;
}
- if ((timeout == 0) || ((time>>11) > timeout))
+ 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 inline int
+pause_await_ide(u8 when_done, u16 iobase1, u16 iobase2, u16 timeout)
+{
+ // Wait one PIO transfer cycle.
+ inb(iobase2 + ATA_CB_ASTAT);
-// ---------------------------------------------------------------------------
-// ATA/ATAPI driver : software reset
-// ---------------------------------------------------------------------------
-// ATA-3
-// 8.2.1 Software reset - Device 0
+ 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(u16 device)
+ata_reset(int driveid)
{
u16 iobase1, iobase2;
u8 channel, slave, sn, sc;
u8 type;
- channel = device / 2;
- slave = device % 2;
+ channel = driveid / 2;
+ slave = driveid % 2;
iobase1 = GET_EBDA(ata.channels[channel].iobase1);
iobase2 = GET_EBDA(ata.channels[channel].iobase2);
// 8.2.1 (f) -- clear SRST
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
- type=GET_EBDA(ata.devices[device].type);
+ type=GET_EBDA(ata.devices[driveid].type);
if (type != ATA_TYPE_NONE) {
// 8.2.1 (g) -- check for sc==sn==0x01
outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
}
-
-// ---------------------------------------------------------------------------
-// ATA/ATAPI driver : execute a data command
-// ---------------------------------------------------------------------------
- // returns
- // 0 : no error
- // 1 : BUSY bit set
- // 2 : read error
- // 3 : expected DRQ=1
- // 4 : no sectors left to read/verify
- // 5 : more sectors to read/verify
- // 6 : no sectors left to write
- // 7 : more sectors to write
-
struct ata_pio_command {
- void *far_buffer;
- u8 biosid;
-
u8 feature;
u8 sector_count;
u8 lba_low;
u8 lba_high2;
};
+// Send an ata command to the drive.
static int
-send_cmd(struct ata_pio_command *cmd)
+send_cmd(int driveid, struct ata_pio_command *cmd)
{
- u16 biosid = cmd->biosid;
- u8 channel = biosid / 2;
+ u8 channel = driveid / 2;
u16 iobase1 = GET_EBDA(ata.channels[channel].iobase1);
u16 iobase2 = GET_EBDA(ata.channels[channel].iobase2);
- u8 status = inb(iobase1 + ATA_CB_STAT);
+ int status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_BSY)
return 1;
outb(cmd->device, iobase1 + ATA_CB_DH);
outb(cmd->command, iobase1 + ATA_CB_CMD);
- await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
+ nsleep(400);
+
+ status = await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
+ if (status < 0)
+ return status;
- status = inb(iobase1 + ATA_CB_STAT);
if (status & ATA_CB_STAT_ERR) {
DEBUGF("send_cmd : read error\n");
return 2;
return 0;
}
-static int
-ata_transfer(struct ata_pio_command *cmd)
+// Read and discard x number of bytes from an io channel.
+static void
+insx_discard(int mode, int iobase1, int bytes)
{
- DEBUGF("ata_transfer id=%d cmd=%d lba=%d count=%d buf=%p\n"
- , cmd->biosid, cmd->command
- , (cmd->lba_high << 16) | (cmd->lba_mid << 8) | cmd->lba_low
- , cmd->sector_count, cmd->far_buffer);
+ 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);
+ }
+}
- // Reset count of transferred data
- SET_EBDA(ata.trsfsectors,0);
- SET_EBDA(ata.trsfbytes,0L);
+// 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 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);
- int ret = send_cmd(cmd);
- if (ret)
- return ret;
+ // Reset count of transferred data
+ SET_EBDA(ata.trsfsectors, 0);
- u16 biosid = cmd->biosid;
- u8 channel = biosid / 2;
+ 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[biosid].mode);
- int iswrite = (cmd->command & ~0x40) == ATA_CMD_WRITE_SECTORS;
- u8 current = 0;
- u16 count = cmd->sector_count;
- u8 status;
- void *far_buffer = cmd->far_buffer;
+ 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", biosid, far_buffer);
+ DEBUGF("Write sector id=%d dest=%p\n", driveid, far_buffer);
if (mode == ATA_MODE_PIO32)
- outsl_far(iobase1, far_buffer, 512 / 4);
+ outsl_far(iobase1, far_buffer, bsize / 4);
else
- outsw_far(iobase1, far_buffer, 512 / 2);
+ outsw_far(iobase1, far_buffer, bsize / 2);
} else {
// Read data from controller
- DEBUGF("Read sector id=%d dest=%p\n", biosid, far_buffer);
+ DEBUGF("Read sector id=%d dest=%p\n", driveid, far_buffer);
if (mode == ATA_MODE_PIO32)
- insl_far(iobase1, far_buffer, 512 / 4);
+ insl_far(iobase1, far_buffer, bsize / 4);
else
- insw_far(iobase1, far_buffer, 512 / 2);
- await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
+ insw_far(iobase1, far_buffer, bsize / 2);
}
- far_buffer += 512;
+ 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);
- count--;
- status = inb(iobase1 + ATA_CB_STAT);
- if (count == 0)
+ 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);
return 0;
}
-inline int
-ata_cmd_data(u16 biosid, u16 command, u32 lba, u16 count, void *far_buffer)
+
+/****************************************************************
+ * ATA hard drive functions
+ ****************************************************************/
+
+// Read/write count blocks from a harddrive.
+int
+ata_cmd_data(int driveid, u16 command, u32 lba, u16 count, void *far_buffer)
{
- u8 slave = biosid % 2;
+ u8 slave = driveid % 2;
struct ata_pio_command cmd;
- cmd.far_buffer = far_buffer;
- cmd.biosid = biosid;
+ memset(&cmd, 0, sizeof(cmd));
if (count >= (1<<8) || lba + count >= (1<<28)) {
cmd.sector_count2 = count >> 8;
cmd.device = ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
| ((lba >> 24) & 0xf) | ATA_CB_DH_LBA);
cmd.command = command;
- return ata_transfer(&cmd);
-}
-// ---------------------------------------------------------------------------
-// ATA/ATAPI driver : execute a packet command
-// ---------------------------------------------------------------------------
- // returns
- // 0 : no error
- // 1 : error in parameters
- // 2 : BUSY bit set
- // 3 : error
- // 4 : not ready
-static inline int
-__ata_cmd_packet(u16 biosid, u8 *cmdbuf, u8 cmdlen
- , u16 header, u32 length, void *far_buffer)
-{
- DEBUGF("ata_cmd_packet d=%d cmdlen=%d h=%d l=%d buf=%p\n"
- , biosid, cmdlen, header, length, far_buffer);
+ int ret = send_cmd(driveid, &cmd);
+ if (ret)
+ return ret;
+
+ int iswrite = command == ATA_CMD_WRITE_SECTORS;
+ return ata_transfer(driveid, iswrite, count, IDE_SECTOR_SIZE
+ , 0, 0, far_buffer);
+}
- u8 channel = biosid / 2;
- u8 slave = biosid % 2;
- // The header length must be even
- if (header & 1) {
- DEBUGF("ata_cmd_packet : header must be even (%04x)\n", header);
- return 1;
- }
+/****************************************************************
+ * ATAPI functions
+ ****************************************************************/
+// Low-level atapi command transmit function.
+static 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);
- u8 mode = GET_EBDA(ata.devices[biosid].mode);
struct ata_pio_command cmd;
cmd.sector_count = 0;
cmd.feature = 0;
cmd.lba_low = 0;
- cmd.lba_mid = 0xf0;
- cmd.lba_high = 0xff;
+ 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;
- cmd.biosid = biosid;
- int ret = send_cmd(&cmd);
+ int ret = send_cmd(driveid, &cmd);
if (ret)
return ret;
- // Reset count of transferred data
- SET_EBDA(ata.trsfsectors,0);
- SET_EBDA(ata.trsfbytes,0L);
-
// Send command to device
outsw_far(iobase1, MAKE_FARPTR(GET_SEG(SS), (u32)cmdbuf), cmdlen / 2);
- u8 status;
- u16 loops = 0;
- for (;;) {
- if (loops == 0) {//first time through
- status = inb(iobase2 + ATA_CB_ASTAT);
- await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
- } else
- await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
- loops++;
-
- status = inb(iobase1 + ATA_CB_STAT);
- inb(iobase1 + ATA_CB_SC);
-
- // Check if command completed
- if(((inb(iobase1 + ATA_CB_SC)&0x7)==0x3) &&
- ((status & (ATA_CB_STAT_RDY | ATA_CB_STAT_ERR)) == ATA_CB_STAT_RDY))
- break;
-
- if (status & ATA_CB_STAT_ERR) {
- DEBUGF("ata_cmd_packet : error (status %02x)\n", status);
- return 3;
- }
-
- // Get the byte count
- u16 lcount = (((u16)(inb(iobase1 + ATA_CB_CH))<<8)
- + inb(iobase1 + ATA_CB_CL));
-
- // adjust to read what we want
- u16 lbefore, lafter;
- if (header > lcount) {
- lbefore=lcount;
- header-=lcount;
- lcount=0;
- } else {
- lbefore=header;
- header=0;
- lcount-=lbefore;
- }
-
- if (lcount > length) {
- lafter=lcount-length;
- lcount=length;
- length=0;
- } else {
- lafter=0;
- length-=lcount;
- }
-
- // Save byte count
- u16 count = lcount;
-
- DEBUGF("Trying to read %04x bytes (%04x %04x %04x) to %p\n"
- , lbefore+lcount+lafter, lbefore, lcount, lafter, far_buffer);
-
- // If counts not dividable by 4, use 16bits mode
- u8 lmode = mode;
- if (lbefore & 0x03) lmode=ATA_MODE_PIO16;
- if (lcount & 0x03) lmode=ATA_MODE_PIO16;
- if (lafter & 0x03) lmode=ATA_MODE_PIO16;
-
- // adds an extra byte if count are odd. before is always even
- if (lcount & 0x01) {
- lcount+=1;
- if ((lafter > 0) && (lafter & 0x01)) {
- lafter-=1;
- }
- }
-
- if (lmode == ATA_MODE_PIO32) {
- lcount>>=2; lbefore>>=2; lafter>>=2;
- } else {
- lcount>>=1; lbefore>>=1; lafter>>=1;
- }
-
- int i;
- for (i=0; i<lbefore; i++)
- if (lmode == ATA_MODE_PIO32)
- inl(iobase1);
- else
- inw(iobase1);
-
- if (lmode == ATA_MODE_PIO32)
- insl_far(iobase1, far_buffer, lcount);
- else
- insw_far(iobase1, far_buffer, lcount);
-
- for (i=0; i<lafter; i++)
- if (lmode == ATA_MODE_PIO32)
- inl(iobase1);
- else
- inw(iobase1);
-
- // Compute new buffer address
- far_buffer += count;
-
- // Save transferred bytes count
- SET_EBDA(ata.trsfsectors, loops);
- }
-
- // Final check, device must be ready
- if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF
- | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
- != ATA_CB_STAT_RDY ) {
- DEBUGF("ata_cmd_packet : not ready (status %02x)\n"
- , (unsigned) status);
- return 4;
- }
+ int status = pause_await_ide(NOT_BSY_DRQ, iobase1, iobase2, IDE_TIMEOUT);
+ if (status < 0)
+ return status;
- // Enable interrupts
- outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
return 0;
}
-int
-ata_cmd_packet(u16 biosid, u8 *cmdbuf, u8 cmdlen
- , u32 length, void *far_buffer)
+// Low-level cdrom read atapi command transmit function.
+static inline int
+send_cdrom_cmd(int driveid, u32 lba, u16 count)
{
- return __ata_cmd_packet(biosid, cmdbuf, cmdlen, 0, length, far_buffer);
-}
+ u8 atacmd[12];
+ memset(atacmd, 0, sizeof(atacmd));
-static void
-build_cdrom_cmd(u8 *atacmd, u32 lba, u16 count)
-{
- memset(atacmd, 0, 12);
atacmd[0]=0x28; // READ command
atacmd[7]=(count & 0xff00) >> 8; // Sectors
atacmd[8]=(count & 0x00ff); // Sectors
atacmd[3]=(lba & 0x00ff0000) >> 16;
atacmd[4]=(lba & 0x0000ff00) >> 8;
atacmd[5]=(lba & 0x000000ff);
+
+ return send_atapi_cmd(driveid, atacmd, sizeof(atacmd), CDROM_SECTOR_SIZE);
}
// Read sectors from the cdrom.
int
-cdrom_read(u16 biosid, u32 lba, u32 count, void *far_buffer)
+cdrom_read(int driveid, u32 lba, u32 count, void *far_buffer)
{
- u8 atacmd[12];
- build_cdrom_cmd(atacmd, lba, count);
- return ata_cmd_packet(biosid, atacmd, sizeof(atacmd)
- , count*2048, far_buffer);
+ int ret = send_cdrom_cmd(driveid, lba, count);
+ if (ret)
+ return ret;
+
+ return ata_transfer(driveid, 0, count, CDROM_SECTOR_SIZE, 0, 0, far_buffer);
}
// Pretend the cdrom has 512 byte sectors (instead of 2048) and read
// sectors.
int
-cdrom_read_512(u16 biosid, u32 vlba, u32 count, void *far_buffer)
+cdrom_read_512(int driveid, u32 vlba, u32 vcount, void *far_buffer)
{
- u32 slba = vlba / 4;
- u16 before = vlba % 4;
- u32 elba = (vlba + count - 1) / 4;
-
- u8 atacmd[12];
- build_cdrom_cmd(atacmd, slba, elba - slba + 1);
+ 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);
+
+ 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_cdrom_cmd(driveid, lba, count);
+ if (ret)
+ return ret;
- int status = __ata_cmd_packet(biosid, atacmd, sizeof(atacmd)
- , before*512, count*512, far_buffer);
- if (status) {
+ ret = ata_transfer(driveid, 0, count, CDROM_SECTOR_SIZE
+ , before*512, after*512, far_buffer);
+ if (ret) {
SET_EBDA(ata.trsfsectors, 0);
- return status;
+ return ret;
}
- SET_EBDA(ata.trsfsectors, count);
+ SET_EBDA(ata.trsfsectors, vcount);
return 0;
}
+// 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/ATAPI driver : device detection
-// ---------------------------------------------------------------------------
+/****************************************************************
+ * ATA detect and init
+ ****************************************************************/
static void
-report_model(u8 devid, u8 *buffer)
+report_model(int driveid, u8 *buffer)
{
u8 model[41];
model[i] = 0x00;
}
- u8 channel = devid / 2;
- u8 slave = devid % 2;
+ 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 void
-init_drive_atapi(u8 devid)
+init_drive_atapi(int driveid)
{
- SET_EBDA(ata.devices[devid].type,ATA_TYPE_ATAPI);
+ SET_EBDA(ata.devices[driveid].type,ATA_TYPE_ATAPI);
// Temporary values to do the transfer
- SET_EBDA(ata.devices[devid].device,ATA_DEVICE_CDROM);
- SET_EBDA(ata.devices[devid].mode, ATA_MODE_PIO16);
+ 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(devid, ATA_CMD_IDENTIFY_DEVICE_PACKET
+ u16 ret = ata_cmd_data(driveid, ATA_CMD_IDENTIFY_DEVICE_PACKET
, 1, 1
, MAKE_FARPTR(GET_SEG(SS), (u32)buffer));
if (ret != 0)
u8 type = buffer[1] & 0x1f;
u8 removable = (buffer[0] & 0x80) ? 1 : 0;
u8 mode = buffer[96] ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
- u16 blksize = 2048;
+ u16 blksize = CDROM_SECTOR_SIZE;
- SET_EBDA(ata.devices[devid].device, type);
- SET_EBDA(ata.devices[devid].removable, removable);
- SET_EBDA(ata.devices[devid].mode, mode);
- SET_EBDA(ata.devices[devid].blksize, blksize);
+ 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], devid);
+ SET_EBDA(ata.idmap[1][cdcount], driveid);
SET_EBDA(ata.cdcount, ++cdcount);
- report_model(devid, buffer);
+ report_model(driveid, buffer);
u8 version = get_ata_version(buffer);
- if (GET_EBDA(ata.devices[devid].device)==ATA_DEVICE_CDROM)
+ 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(u8 devid)
+init_drive_ata(int driveid)
{
- SET_EBDA(ata.devices[devid].type,ATA_TYPE_ATA);
+ SET_EBDA(ata.devices[driveid].type,ATA_TYPE_ATA);
// Temporary values to do the transfer
- SET_EBDA(ata.devices[devid].device, ATA_DEVICE_HD);
- SET_EBDA(ata.devices[devid].mode, ATA_MODE_PIO16);
+ 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(devid, ATA_CMD_IDENTIFY_DEVICE
+ u16 ret = ata_cmd_data(driveid, ATA_CMD_IDENTIFY_DEVICE
, 1, 1
, MAKE_FARPTR(GET_SEG(SS), (u32)buffer));
if (ret)
u32 sectors = *(u32*)&buffer[60*2]; // word 60 and word 61
- SET_EBDA(ata.devices[devid].device,ATA_DEVICE_HD);
- SET_EBDA(ata.devices[devid].removable, removable);
- SET_EBDA(ata.devices[devid].mode, mode);
- SET_EBDA(ata.devices[devid].blksize, blksize);
- SET_EBDA(ata.devices[devid].pchs.heads, heads);
- SET_EBDA(ata.devices[devid].pchs.cylinders, cylinders);
- SET_EBDA(ata.devices[devid].pchs.spt, spt);
- SET_EBDA(ata.devices[devid].sectors, sectors);
-
- u8 channel = devid / 2;
- u8 slave = devid % 2;
+ 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=devid%4; shift>0; shift--)
+ for (shift=driveid%4; shift>0; shift--)
translation >>= 2;
translation &= 0x03;
- SET_EBDA(ata.devices[devid].translation, translation);
+ SET_EBDA(ata.devices[driveid].translation, translation);
BX_INFO("ata%d-%d: PCHS=%u/%d/%d translation="
, channel, slave, cylinders, heads, spt);
cylinders = 1024;
BX_INFO(" LCHS=%d/%d/%d\n", cylinders, heads, spt);
- SET_EBDA(ata.devices[devid].lchs.heads, heads);
- SET_EBDA(ata.devices[devid].lchs.cylinders, cylinders);
- SET_EBDA(ata.devices[devid].lchs.spt, 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], devid);
+ SET_EBDA(ata.idmap[0][hdcount], driveid);
SET_EBDA(ata.hdcount, ++hdcount);
- u32 sizeinmb = GET_EBDA(ata.devices[devid].sectors);
+ u32 sizeinmb = GET_EBDA(ata.devices[driveid].sectors);
sizeinmb >>= 11;
- report_model(devid, buffer);
+ report_model(driveid, buffer);
u8 version = get_ata_version(buffer);
if (sizeinmb < (1 << 16))
printf(" ATA-%d Hard-Disk (%u MBytes)\n", version, sizeinmb);
}
static void
-init_drive_unknown(u8 devid)
+init_drive_unknown(int driveid)
{
- SET_EBDA(ata.devices[devid].type,ATA_TYPE_UNKNOWN);
+ SET_EBDA(ata.devices[driveid].type,ATA_TYPE_UNKNOWN);
- u8 channel = devid / 2;
- u8 slave = devid % 2;
+ u8 channel = driveid / 2;
+ u8 slave = driveid % 2;
printf("ata%d %s: Unknown device\n", channel, slave ? " slave" : "master");
}
#endif
// Device detection
- u8 devid;
- for(devid=0; devid<CONFIG_MAX_ATA_DEVICES; devid++) {
- u8 channel = devid / 2;
- u8 slave = devid % 2;
+ 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);
continue;
// reset the channel
- ata_reset(devid);
+ 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(devid);
+ init_drive_unknown(driveid);
continue;
}
u8 cl = inb(iobase1+ATA_CB_CL);
u8 st = inb(iobase1+ATA_CB_STAT);
if (cl==0x14 && ch==0xeb)
- init_drive_atapi(devid);
+ init_drive_atapi(driveid);
else if (cl==0x00 && ch==0x00 && st!=0x00)
- init_drive_ata(devid);
+ init_drive_ata(driveid);
else if (cl==0xff && ch==0xff)
// None
continue;
else
- init_drive_unknown(devid);
+ init_drive_unknown(driveid);
}
// Store the device count
projects / seabios.git / commitdiff