// 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.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "disk.h" // floppy_13
#include "biosvar.h" // SET_BDA
#include "pic.h" // eoi_pic2
#include "bregs.h" // struct bregs
#include "pci.h" // pci_bdf_to_bus
-#include "atabits.h" // ATA_CB_STAT
+#include "ata.h" // ATA_CB_DC
/****************************************************************
****************************************************************/
void
-__disk_ret(const char *fname, int lineno, struct bregs *regs, u8 code)
+__disk_ret(struct bregs *regs, u32 linecode, const char *fname)
{
+ u8 code = linecode;
SET_BDA(disk_last_status, code);
if (code)
- __set_code_fail(fname, lineno, regs, code);
+ __set_code_fail(regs, linecode, fname);
else
set_code_success(regs);
}
static void
-__disk_stub(const char *fname, int lineno, struct bregs *regs)
+__disk_stub(struct bregs *regs, int lineno, const char *fname)
{
- __debug_stub(fname, lineno, regs);
- __disk_ret(fname, lineno, regs, DISK_RET_SUCCESS);
+ __debug_stub(regs, lineno, fname);
+ __disk_ret(regs, DISK_RET_SUCCESS | (lineno << 8), fname);
}
-#define DISK_STUB(regs) \
- __disk_stub(__func__, __LINE__, (regs))
+#define DISK_STUB(regs) \
+ __disk_stub((regs), __LINE__, __func__)
+// Execute a "disk_op_s" request - this runs on a stack in the ebda.
static int
-__send_disk_op(struct disk_op_s *op_p, u16 op_s)
+__send_disk_op(struct disk_op_s *op_far, u16 op_seg)
{
struct disk_op_s dop;
- memcpy_far(MAKE_FARPTR(GET_SEG(SS), &dop)
- , MAKE_FARPTR(op_s, op_p)
+ memcpy_far(GET_SEG(SS), &dop
+ , 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.far_buffer
+ , dop.driveid, (u32)dop.lba, dop.buf_fl
, dop.count, dop.command);
irq_enable();
- int status;
- if (dop.command == CMD_CDEMU_READ)
- status = cdrom_read_512(&dop);
- else if (dop.command == CMD_CDROM_READ)
- status = cdrom_read(&dop);
- else
- status = ata_cmd_data(&dop);
+ int status = 0;
+ u8 type = GET_GLOBAL(Drives.drives[dop.driveid].type);
+ if (type == DTYPE_ATA)
+ status = process_ata_op(&dop);
+ else if (type == DTYPE_ATAPI)
+ status = process_atapi_op(&dop);
irq_disable();
+ // Update count with total sectors transferred.
+ SET_FARVAR(op_seg, op_far->count, dop.count);
+
+ if (status)
+ dprintf(1, "disk_op cmd %d error %d!\n", dop.command, status);
+
return status;
}
+// Execute a "disk_op_s" request by jumping to a stack in the ebda.
static int
send_disk_op(struct disk_op_s *op)
{
+ if (! CONFIG_DRIVES)
+ return -1;
+
return stack_hop((u32)op, GET_SEG(SS), 0, __send_disk_op);
}
-static void
-basic_access(struct bregs *regs, u8 device, u16 command)
+// Obtain the requested disk lba from an old-style chs request.
+static int
+legacy_lba(struct bregs *regs, u16 lchs_seg, struct chs_s *lchs_far)
{
- struct disk_op_s dop;
- dop.lba = 0;
- dop.driveid = device;
- u8 type = GET_GLOBAL(ATA.devices[device].type);
- u16 nlc, nlh, nlspt;
- if (type == ATA_TYPE_ATA) {
- nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
- nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
- nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
- dop.command = command;
- } else {
- // Must be cd emulation.
- u16 ebda_seg = get_ebda_seg();
- nlc = GET_EBDA2(ebda_seg, cdemu.cylinders);
- nlh = GET_EBDA2(ebda_seg, cdemu.heads);
- nlspt = GET_EBDA2(ebda_seg, cdemu.spt);
- dop.lba = GET_EBDA2(ebda_seg, cdemu.ilba) * 4;
- dop.command = CMD_CDEMU_READ;
- }
-
- dop.count = regs->al;
- u16 cylinder = regs->ch | ((((u16) regs->cl) << 2) & 0x300);
- u16 sector = regs->cl & 0x3f;
- u16 head = regs->dh;
+ u8 count = regs->al;
+ u16 cylinder = regs->ch | ((((u16)regs->cl) << 2) & 0x300);
+ u16 sector = regs->cl & 0x3f;
+ u16 head = regs->dh;
- if (dop.count > 128 || dop.count == 0 || sector == 0) {
+ if (count > 128 || count == 0 || sector == 0) {
dprintf(1, "int13_harddisk: function %02x, parameter out of range!\n"
, regs->ah);
disk_ret(regs, DISK_RET_EPARAM);
- return;
+ return -1;
}
+ u16 nlc = GET_FARVAR(lchs_seg, lchs_far->cylinders);
+ u16 nlh = GET_FARVAR(lchs_seg, lchs_far->heads);
+ u16 nlspt = GET_FARVAR(lchs_seg, lchs_far->spt);
+
// sanity check on cyl heads, sec
if (cylinder >= nlc || head >= nlh || sector > nlspt) {
dprintf(1, "int13_harddisk: function %02x, parameters out of"
" range %04x/%04x/%04x!\n"
, regs->ah, cylinder, head, sector);
disk_ret(regs, DISK_RET_EPARAM);
- return;
- }
-
- if (!command) {
- // If verify or seek
- disk_ret(regs, DISK_RET_SUCCESS);
- return;
+ return -1;
}
// translate lchs to lba
- dop.lba += (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
- + (u32)sector - 1);
+ return (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
+ + (u32)sector - 1);
+}
- u16 segment = regs->es;
- u16 offset = regs->bx;
- dop.far_buffer = MAKE_FARPTR(segment, offset);
+// Perform read/write/verify using old-style chs accesses
+static void
+basic_access(struct bregs *regs, u8 device, u16 command)
+{
+ struct disk_op_s dop;
+ dop.driveid = device;
+ dop.command = command;
+ int lba = legacy_lba(regs, get_global_seg(), &Drives.drives[device].lchs);
+ if (lba < 0)
+ return;
+ dop.lba = lba;
+ dop.count = regs->al;
+ dop.buf_fl = MAKE_FLATPTR(regs->es, regs->bx);
int status = send_disk_op(&dop);
- // Set nb of sector transferred
- regs->al = GET_EBDA(sector_count);
+ regs->al = dop.count;
- if (status != 0) {
- dprintf(1, "int13_harddisk: function %02x, error %d!\n"
- , regs->ah, status);
+ if (status) {
disk_ret(regs, DISK_RET_EBADTRACK);
return;
}
disk_ret(regs, DISK_RET_SUCCESS);
}
+// Perform cdemu read/verify
+void
+cdemu_access(struct bregs *regs, u8 device, u16 command)
+{
+ struct disk_op_s dop;
+ dop.driveid = device;
+ dop.command = command;
+ u16 ebda_seg = get_ebda_seg();
+ int vlba = legacy_lba(
+ regs, ebda_seg
+ , (void*)offsetof(struct extended_bios_data_area_s, cdemu.lchs));
+ if (vlba < 0)
+ return;
+ dop.lba = GET_EBDA2(ebda_seg, cdemu.ilba) + vlba / 4;
+ u8 count = regs->al;
+ u8 *cdbuf_far = (void*)offsetof(struct extended_bios_data_area_s, cdemu_buf);
+ u8 *dest_far = (void*)(regs->bx+0);
+ regs->al = 0;
+
+ if (vlba & 3) {
+ dop.count = 1;
+ dop.buf_fl = MAKE_FLATPTR(ebda_seg, cdbuf_far);
+ int status = send_disk_op(&dop);
+ if (status)
+ goto fail;
+ u8 thiscount = 4 - (vlba & 3);
+ if (thiscount > count)
+ thiscount = count;
+ count -= thiscount;
+ memcpy_far(regs->es, dest_far
+ , ebda_seg, cdbuf_far + (vlba & 3) * 512
+ , thiscount * 512);
+ dest_far += thiscount * 512;
+ regs->al += thiscount;
+ dop.lba++;
+ }
+
+ if (count > 3) {
+ dop.count = count / 4;
+ dop.buf_fl = MAKE_FLATPTR(regs->es, dest_far);
+ int status = send_disk_op(&dop);
+ regs->al += dop.count * 4;
+ if (status)
+ goto fail;
+ u8 thiscount = count & ~3;
+ count &= 3;
+ dest_far += thiscount * 512;
+ dop.lba += thiscount / 4;
+ }
+
+ if (count) {
+ dop.count = 1;
+ dop.buf_fl = MAKE_FLATPTR(ebda_seg, cdbuf_far);
+ int status = send_disk_op(&dop);
+ if (status)
+ goto fail;
+ u8 thiscount = count;
+ memcpy_far(regs->es, dest_far, ebda_seg, cdbuf_far, thiscount * 512);
+ regs->al += thiscount;
+ }
+
+ disk_ret(regs, DISK_RET_SUCCESS);
+ return;
+fail:
+ disk_ret(regs, DISK_RET_EBADTRACK);
+}
+
+// Perform read/write/verify using new-style "int13ext" accesses.
static void
extended_access(struct bregs *regs, u8 device, u16 command)
{
dop.lba = GET_INT13EXT(regs, lba);
dop.command = command;
dop.driveid = device;
- u8 type = GET_GLOBAL(ATA.devices[device].type);
- if (type == ATA_TYPE_ATA) {
- if (dop.lba >= GET_GLOBAL(ATA.devices[device].sectors)) {
- dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
- , regs->ah);
- disk_ret(regs, DISK_RET_EPARAM);
- return;
- }
- } else {
- dop.command = CMD_CDROM_READ;
- }
-
- if (!command) {
- // If verify or seek
- disk_ret(regs, DISK_RET_SUCCESS);
+ if (dop.lba >= GET_GLOBAL(Drives.drives[device].sectors)) {
+ dprintf(1, "int13_harddisk: function %02x. LBA out of range\n"
+ , regs->ah);
+ disk_ret(regs, DISK_RET_EPARAM);
return;
}
u16 segment = GET_INT13EXT(regs, segment);
u16 offset = GET_INT13EXT(regs, offset);
- dop.far_buffer = MAKE_FARPTR(segment, offset);
+ dop.buf_fl = MAKE_FLATPTR(segment, offset);
dop.count = GET_INT13EXT(regs, count);
int status = send_disk_op(&dop);
- SET_INT13EXT(regs, count, GET_EBDA(sector_count));
+ SET_INT13EXT(regs, count, dop.count);
- if (status != 0) {
- dprintf(1, "int13_harddisk: function %02x, error %d!\n"
- , regs->ah, status);
+ if (status) {
disk_ret(regs, DISK_RET_EBADTRACK);
return;
}
static void
disk_1300(struct bregs *regs, u8 device)
{
- ata_reset(device);
+ struct disk_op_s dop;
+ dop.driveid = device;
+ dop.command = CMD_RESET;
+ send_disk_op(&dop);
}
// read disk status
static void
disk_1302(struct bregs *regs, u8 device)
{
- basic_access(regs, device, ATA_CMD_READ_SECTORS);
+ basic_access(regs, device, CMD_READ);
}
// write disk sectors
static void
disk_1303(struct bregs *regs, u8 device)
{
- basic_access(regs, device, ATA_CMD_WRITE_SECTORS);
+ basic_access(regs, device, CMD_WRITE);
}
// verify disk sectors
static void
disk_1304(struct bregs *regs, u8 device)
{
- basic_access(regs, device, 0);
+ basic_access(regs, device, CMD_VERIFY);
// FIXME verify
}
disk_1308(struct bregs *regs, u8 device)
{
// Get logical geometry from table
- u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
- u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
- u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
+ u16 nlc = GET_GLOBAL(Drives.drives[device].lchs.cylinders);
+ u16 nlh = GET_GLOBAL(Drives.drives[device].lchs.heads);
+ u16 nlspt = GET_GLOBAL(Drives.drives[device].lchs.spt);
u16 count = GET_BDA(hdcount);
nlc = nlc - 2; /* 0 based , last sector not used */
{
// should look at 40:8E also???
- // Read the status from controller
- u8 status = inb(GET_GLOBAL(ATA.channels[device/2].iobase1) + ATA_CB_STAT);
- if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY )
- disk_ret(regs, DISK_RET_SUCCESS);
- else
+ struct disk_op_s dop;
+ dop.driveid = device;
+ dop.command = CMD_ISREADY;
+ int status = send_disk_op(&dop);
+ if (status)
disk_ret(regs, DISK_RET_ENOTREADY);
+ else
+ disk_ret(regs, DISK_RET_SUCCESS);
}
// recalibrate
disk_1315(struct bregs *regs, u8 device)
{
// Get logical geometry from table
- u16 nlc = GET_GLOBAL(ATA.devices[device].lchs.cylinders);
- u16 nlh = GET_GLOBAL(ATA.devices[device].lchs.heads);
- u16 nlspt = GET_GLOBAL(ATA.devices[device].lchs.spt);
+ u16 nlc = GET_GLOBAL(Drives.drives[device].lchs.cylinders);
+ u16 nlh = GET_GLOBAL(Drives.drives[device].lchs.heads);
+ u16 nlspt = GET_GLOBAL(Drives.drives[device].lchs.spt);
// Compute sector count seen by int13
u32 lba = (u32)(nlc - 1) * (u32)nlh * (u32)nlspt;
static void
disk_1342(struct bregs *regs, u8 device)
{
- extended_access(regs, device, ATA_CMD_READ_SECTORS);
+ extended_access(regs, device, CMD_READ);
}
// IBM/MS extended write
static void
disk_1343(struct bregs *regs, u8 device)
{
- extended_access(regs, device, ATA_CMD_WRITE_SECTORS);
+ extended_access(regs, device, CMD_WRITE);
}
// IBM/MS verify
static void
disk_1344(struct bregs *regs, u8 device)
{
- extended_access(regs, device, 0);
+ extended_access(regs, device, CMD_VERIFY);
}
// IBM/MS lock/unlock drive
static void
disk_1347(struct bregs *regs, u8 device)
{
- extended_access(regs, device, 0);
+ extended_access(regs, device, CMD_SEEK);
}
// IBM/MS get drive parameters
// EDD 1.x
- u8 type = GET_GLOBAL(ATA.devices[device].type);
- u16 npc = GET_GLOBAL(ATA.devices[device].pchs.cylinders);
- u16 nph = GET_GLOBAL(ATA.devices[device].pchs.heads);
- u16 npspt = GET_GLOBAL(ATA.devices[device].pchs.spt);
- u64 lba = GET_GLOBAL(ATA.devices[device].sectors);
- u16 blksize = GET_GLOBAL(ATA.devices[device].blksize);
+ u8 type = GET_GLOBAL(Drives.drives[device].type);
+ u16 npc = GET_GLOBAL(Drives.drives[device].pchs.cylinders);
+ u16 nph = GET_GLOBAL(Drives.drives[device].pchs.heads);
+ u16 npspt = GET_GLOBAL(Drives.drives[device].pchs.spt);
+ u64 lba = GET_GLOBAL(Drives.drives[device].sectors);
+ u16 blksize = GET_GLOBAL(Drives.drives[device].blksize);
dprintf(DEBUG_HDL_13, "disk_1348 size=%d t=%d chs=%d,%d,%d lba=%d bs=%d\n"
, size, type, npc, nph, npspt, (u32)lba, blksize);
SET_INT13DPT(regs, size, 26);
- if (type == ATA_TYPE_ATA) {
+ if (type == DTYPE_ATAPI) {
+ // 0x74 = removable, media change, lockable, max values
+ SET_INT13DPT(regs, infos, 0x74);
+ SET_INT13DPT(regs, cylinders, 0xffffffff);
+ SET_INT13DPT(regs, heads, 0xffffffff);
+ SET_INT13DPT(regs, spt, 0xffffffff);
+ SET_INT13DPT(regs, sector_count, (u64)-1);
+ } else {
if (lba > (u64)npspt*nph*0x3fff) {
SET_INT13DPT(regs, infos, 0x00); // geometry is invalid
SET_INT13DPT(regs, cylinders, 0x3fff);
SET_INT13DPT(regs, heads, (u32)nph);
SET_INT13DPT(regs, spt, (u32)npspt);
SET_INT13DPT(regs, sector_count, lba);
- } else {
- // ATAPI
- // 0x74 = removable, media change, lockable, max values
- SET_INT13DPT(regs, infos, 0x74);
- SET_INT13DPT(regs, cylinders, 0xffffffff);
- SET_INT13DPT(regs, heads, 0xffffffff);
- SET_INT13DPT(regs, spt, 0xffffffff);
- SET_INT13DPT(regs, sector_count, (u64)-1);
}
SET_INT13DPT(regs, blksize, blksize);
- if (size < 30) {
+ if (size < 30 || (type != DTYPE_ATA && type != DTYPE_ATAPI)) {
disk_ret(regs, DISK_RET_SUCCESS);
return;
}
, offsetof(struct extended_bios_data_area_s, dpte));
// Fill in dpte
- u8 channel = device / 2;
- u8 slave = device % 2;
- u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
- u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
- u8 irq = GET_GLOBAL(ATA.channels[channel].irq);
- u8 mode = GET_GLOBAL(ATA.devices[device].mode);
+ u8 ataid = GET_GLOBAL(Drives.drives[device].cntl_id);
+ u8 channel = ataid / 2;
+ u8 slave = ataid % 2;
+ u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
+ u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
+ u8 irq = GET_GLOBAL(ATA_channels[channel].irq);
u16 options = 0;
- if (type == ATA_TYPE_ATA) {
- u8 translation = GET_GLOBAL(ATA.devices[device].translation);
- if (translation != ATA_TRANSLATION_NONE) {
+ if (type == DTYPE_ATA) {
+ u8 translation = GET_GLOBAL(Drives.drives[device].translation);
+ if (translation != TRANSLATION_NONE) {
options |= 1<<3; // CHS translation
- if (translation == ATA_TRANSLATION_LBA)
+ if (translation == TRANSLATION_LBA)
options |= 1<<9;
- if (translation == ATA_TRANSLATION_RECHS)
+ if (translation == TRANSLATION_RECHS)
options |= 3<<9;
}
} else {
options |= 1<<6; // atapi device
}
options |= 1<<4; // lba translation
- if (mode == ATA_MODE_PIO32)
+ if (CONFIG_ATA_PIO32)
options |= 1<<7;
SET_EBDA2(ebda_seg, dpte.iobase1, iobase1);
SET_EBDA2(ebda_seg, dpte.reserved, 0);
SET_EBDA2(ebda_seg, dpte.revision, 0x11);
- u8 *p = MAKE_FARPTR(ebda_seg
- , offsetof(struct extended_bios_data_area_s, dpte));
- SET_EBDA2(ebda_seg, dpte.checksum, -checksum(p, 15));
+ u8 sum = checksum_far(
+ ebda_seg, (void*)offsetof(struct extended_bios_data_area_s, dpte), 15);
+ SET_EBDA2(ebda_seg, dpte.checksum, -sum);
if (size < 66) {
disk_ret(regs, DISK_RET_SUCCESS);
SET_INT13DPT(regs, host_bus[2], 'I');
SET_INT13DPT(regs, host_bus[3], 0);
- u32 bdf = GET_GLOBAL(ATA.channels[channel].pci_bdf);
+ u32 bdf = GET_GLOBAL(ATA_channels[channel].pci_bdf);
u32 path = (pci_bdf_to_bus(bdf) | (pci_bdf_to_dev(bdf) << 8)
| (pci_bdf_to_fn(bdf) << 16));
SET_INT13DPT(regs, iface_path, path);
SET_INT13DPT(regs, device_path, slave);
- SET_INT13DPT(regs, checksum, -checksum(MAKE_FARPTR(regs->ds, 30), 35));
+ SET_INT13DPT(regs, checksum
+ , -checksum_far(regs->ds, (void*)(regs->si+30), 35));
disk_ret(regs, DISK_RET_SUCCESS);
}
* Entry points
****************************************************************/
-static u8
+static int
get_device(struct bregs *regs, u8 iscd, u8 drive)
{
// basic check : device has to be defined
- if (drive >= CONFIG_MAX_ATA_DEVICES) {
+ if (drive >= ARRAY_SIZE(Drives.idmap[0])) {
disk_ret(regs, DISK_RET_EPARAM);
- return CONFIG_MAX_ATA_DEVICES;
+ return -1;
}
// Get the ata channel
- u8 device = GET_GLOBAL(ATA.idmap[iscd][drive]);
+ u8 driveid = GET_GLOBAL(Drives.idmap[iscd][drive]);
// basic check : device has to be valid
- if (device >= CONFIG_MAX_ATA_DEVICES) {
+ if (driveid >= ARRAY_SIZE(Drives.drives)) {
disk_ret(regs, DISK_RET_EPARAM);
- return CONFIG_MAX_ATA_DEVICES;
+ return -1;
}
- return device;
+ return driveid;
}
static void
return;
}
- if (! CONFIG_ATA) {
+ if (! CONFIG_DRIVES) {
// XXX - old code had other disk access method.
disk_ret(regs, DISK_RET_EPARAM);
return;
}
if (drive >= 0xe0) {
- u8 device = get_device(regs, 1, drive - 0xe0);
- if (device >= CONFIG_MAX_ATA_DEVICES)
+ int driveid = get_device(regs, 1, drive - 0xe0);
+ if (driveid < 0)
return;
- cdrom_13(regs, device);
+ cdrom_13(regs, driveid);
return;
}
- u8 device = get_device(regs, 0, drive - 0x80);
- if (device >= CONFIG_MAX_ATA_DEVICES)
+ int driveid = get_device(regs, 0, drive - 0x80);
+ if (driveid < 0)
return;
- disk_13(regs, device);
+ disk_13(regs, driveid);
}
void VISIBLE16
}
u16 ebda_seg = get_ebda_seg();
if (GET_EBDA2(ebda_seg, cdemu.active)) {
- if (drive == GET_EBDA2(ebda_seg, cdemu.emulated_drive)) {
+ u8 emudrive = GET_EBDA2(ebda_seg, cdemu.emulated_drive);
+ if (drive == emudrive) {
cdemu_13(regs);
return;
}
- if (drive < 0xe0)
+ if (drive < 0xe0 && ((emudrive ^ drive) & 0x80) == 0)
drive--;
}
}
SET_BDA(disk_interrupt_flag, 0xff);
eoi_pic2();
}
+
+// Old Fixed Disk Parameter Table (newer tables are in the ebda).
+struct fdpt_s OldFDPT VAR16FIXED(0xe401);
projects / seabios.git / blobdiff