// 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" // struct bregs
+#include "biosvar.h" // SET_BDA
+#include "config.h" // CONFIG_*
#include "util.h" // debug_enter
+#include "pic.h" // eoi_pic2
+#include "bregs.h" // struct bregs
+#include "pci.h" // pci_bdf_to_bus
+#include "ata.h" // ATA_CB_DC
+
+/****************************************************************
+ * Helper functions
+ ****************************************************************/
+
+void
+__disk_ret(struct bregs *regs, u32 linecode, const char *fname)
+{
+ u8 code = linecode;
+ SET_BDA(disk_last_status, code);
+ if (code)
+ __set_code_fail(regs, linecode, fname);
+ else
+ set_code_success(regs);
+}
+
+static void
+__disk_stub(struct bregs *regs, int lineno, const char *fname)
+{
+ __debug_stub(regs, lineno, fname);
+ __disk_ret(regs, DISK_RET_SUCCESS | (lineno << 8), fname);
+}
+
+#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_far, u16 op_seg)
+{
+ struct disk_op_s dop;
+ 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.buf_fl
+ , dop.count, dop.command);
+
+ irq_enable();
+
+ 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);
+}
+
+// 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)
+{
+ u8 count = regs->al;
+ u16 cylinder = regs->ch | ((((u16)regs->cl) << 2) & 0x300);
+ u16 sector = regs->cl & 0x3f;
+ u16 head = regs->dh;
+
+ 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 -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 -1;
+ }
+
+ // translate lchs to lba
+ return (((((u32)cylinder * (u32)nlh) + (u32)head) * (u32)nlspt)
+ + (u32)sector - 1);
+}
+
+// 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);
+
+ regs->al = dop.count;
+
+ 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)
+{
+ struct disk_op_s dop;
+ // Get lba and check.
+ dop.lba = GET_INT13EXT(regs, lba);
+ dop.command = command;
+ dop.driveid = device;
+ 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.buf_fl = MAKE_FLATPTR(segment, offset);
+ dop.count = GET_INT13EXT(regs, count);
+
+ int status = send_disk_op(&dop);
+
+ SET_INT13EXT(regs, count, dop.count);
+
+ if (status) {
+ disk_ret(regs, DISK_RET_EBADTRACK);
+ return;
+ }
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+
+/****************************************************************
+ * Hard Drive functions
+ ****************************************************************/
+
+// disk controller reset
+static void
+disk_1300(struct bregs *regs, u8 device)
+{
+ struct disk_op_s dop;
+ dop.driveid = device;
+ dop.command = CMD_RESET;
+ send_disk_op(&dop);
+}
+
+// read disk status
+static void
+disk_1301(struct bregs *regs, u8 device)
+{
+ u8 v = GET_BDA(disk_last_status);
+ regs->ah = v;
+ set_cf(regs, v);
+ // XXX - clear disk_last_status?
+}
+
+// read disk sectors
+static void
+disk_1302(struct bregs *regs, u8 device)
+{
+ basic_access(regs, device, CMD_READ);
+}
+
+// write disk sectors
+static void
+disk_1303(struct bregs *regs, u8 device)
+{
+ basic_access(regs, device, CMD_WRITE);
+}
+
+// verify disk sectors
+static void
+disk_1304(struct bregs *regs, u8 device)
+{
+ basic_access(regs, device, CMD_VERIFY);
+ // FIXME verify
+}
+
+// format disk track
+static void
+disk_1305(struct bregs *regs, u8 device)
+{
+ DISK_STUB(regs);
+}
+
+// read disk drive parameters
+static void
+disk_1308(struct bregs *regs, u8 device)
+{
+ // Get logical geometry from table
+ 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 */
+ regs->al = 0;
+ regs->ch = nlc & 0xff;
+ regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
+ regs->dh = nlh - 1;
+ regs->dl = count; /* FIXME returns 0, 1, or n hard drives */
+
+ // FIXME should set ES & DI
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+// initialize drive parameters
+static void
+disk_1309(struct bregs *regs, u8 device)
+{
+ DISK_STUB(regs);
+}
+
+// seek to specified cylinder
+static void
+disk_130c(struct bregs *regs, u8 device)
+{
+ DISK_STUB(regs);
+}
+
+// alternate disk reset
+static void
+disk_130d(struct bregs *regs, u8 device)
+{
+ DISK_STUB(regs);
+}
+
+// check drive ready
+static void
+disk_1310(struct bregs *regs, u8 device)
+{
+ // should look at 40:8E also???
+
+ 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
+static void
+disk_1311(struct bregs *regs, u8 device)
+{
+ DISK_STUB(regs);
+}
+
+// controller internal diagnostic
+static void
+disk_1314(struct bregs *regs, u8 device)
+{
+ DISK_STUB(regs);
+}
+
+// read disk drive size
+static void
+disk_1315(struct bregs *regs, u8 device)
+{
+ // Get logical geometry from table
+ 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;
+ regs->cx = lba >> 16;
+ regs->dx = lba & 0xffff;
+
+ disk_ret(regs, DISK_RET_SUCCESS);
+ regs->ah = 3; // hard disk accessible
+}
+
+// IBM/MS installation check
+static void
+disk_1341(struct bregs *regs, u8 device)
+{
+ regs->bx = 0xaa55; // install check
+ regs->cx = 0x0007; // ext disk access and edd, removable supported
+ disk_ret(regs, DISK_RET_SUCCESS);
+ regs->ah = 0x30; // EDD 3.0
+}
+
+// IBM/MS extended read
+static void
+disk_1342(struct bregs *regs, u8 device)
+{
+ extended_access(regs, device, CMD_READ);
+}
+
+// IBM/MS extended write
static void
-disk_13(struct bregs *regs, u8 drive)
+disk_1343(struct bregs *regs, u8 device)
{
- set_cf(regs, 1);
+ extended_access(regs, device, CMD_WRITE);
+}
+
+// IBM/MS verify
+static void
+disk_1344(struct bregs *regs, u8 device)
+{
+ extended_access(regs, device, CMD_VERIFY);
+}
+
+// IBM/MS lock/unlock drive
+static void
+disk_1345(struct bregs *regs, u8 device)
+{
+ // Always success for HD
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+// IBM/MS eject media
+static void
+disk_1346(struct bregs *regs, u8 device)
+{
+ // Volume Not Removable
+ disk_ret(regs, DISK_RET_ENOTREMOVABLE);
+}
+
+// IBM/MS extended seek
+static void
+disk_1347(struct bregs *regs, u8 device)
+{
+ extended_access(regs, device, CMD_SEEK);
+}
+
+// IBM/MS get drive parameters
+static void
+disk_1348(struct bregs *regs, u8 device)
+{
+ u16 size = GET_INT13DPT(regs, size);
+
+ // Buffer is too small
+ if (size < 26) {
+ disk_ret(regs, DISK_RET_EPARAM);
+ return;
+ }
+
+ // EDD 1.x
+
+ 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 == 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);
+ } else {
+ SET_INT13DPT(regs, infos, 0x02); // geometry is valid
+ SET_INT13DPT(regs, cylinders, (u32)npc);
+ }
+ SET_INT13DPT(regs, heads, (u32)nph);
+ SET_INT13DPT(regs, spt, (u32)npspt);
+ SET_INT13DPT(regs, sector_count, lba);
+ }
+ SET_INT13DPT(regs, blksize, blksize);
+
+ if (size < 30 || (type != DTYPE_ATA && type != DTYPE_ATAPI)) {
+ disk_ret(regs, DISK_RET_SUCCESS);
+ return;
+ }
+
+ // EDD 2.x
+
+ u16 ebda_seg = get_ebda_seg();
+ SET_INT13DPT(regs, size, 30);
+
+ SET_INT13DPT(regs, dpte_segment, ebda_seg);
+ SET_INT13DPT(regs, dpte_offset
+ , offsetof(struct extended_bios_data_area_s, dpte));
+
+ // Fill in dpte
+ 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 == DTYPE_ATA) {
+ u8 translation = GET_GLOBAL(Drives.drives[device].translation);
+ if (translation != TRANSLATION_NONE) {
+ options |= 1<<3; // CHS translation
+ if (translation == TRANSLATION_LBA)
+ options |= 1<<9;
+ if (translation == TRANSLATION_RECHS)
+ options |= 3<<9;
+ }
+ } else {
+ // ATAPI
+ options |= 1<<5; // removable device
+ options |= 1<<6; // atapi device
+ }
+ options |= 1<<4; // lba translation
+ if (CONFIG_ATA_PIO32)
+ options |= 1<<7;
+
+ SET_EBDA2(ebda_seg, dpte.iobase1, iobase1);
+ SET_EBDA2(ebda_seg, dpte.iobase2, iobase2 + ATA_CB_DC);
+ SET_EBDA2(ebda_seg, dpte.prefix, ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
+ | ATA_CB_DH_LBA));
+ SET_EBDA2(ebda_seg, dpte.unused, 0xcb);
+ SET_EBDA2(ebda_seg, dpte.irq, irq);
+ SET_EBDA2(ebda_seg, dpte.blkcount, 1);
+ SET_EBDA2(ebda_seg, dpte.dma, 0);
+ SET_EBDA2(ebda_seg, dpte.pio, 0);
+ SET_EBDA2(ebda_seg, dpte.options, options);
+ SET_EBDA2(ebda_seg, dpte.reserved, 0);
+ SET_EBDA2(ebda_seg, dpte.revision, 0x11);
+
+ 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);
+ return;
+ }
+
+ // EDD 3.x
+ SET_INT13DPT(regs, key, 0xbedd);
+ SET_INT13DPT(regs, dpi_length, 36);
+ SET_INT13DPT(regs, reserved1, 0);
+ SET_INT13DPT(regs, reserved2, 0);
+
+ SET_INT13DPT(regs, host_bus[0], 'P');
+ SET_INT13DPT(regs, host_bus[1], 'C');
+ SET_INT13DPT(regs, host_bus[2], 'I');
+ SET_INT13DPT(regs, host_bus[3], 0);
+
+ 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, iface_type[0], 'A');
+ SET_INT13DPT(regs, iface_type[1], 'T');
+ SET_INT13DPT(regs, iface_type[2], 'A');
+ SET_INT13DPT(regs, iface_type[3], 0);
+ SET_INT13DPT(regs, iface_type[4], 0);
+ SET_INT13DPT(regs, iface_type[5], 0);
+ SET_INT13DPT(regs, iface_type[6], 0);
+ SET_INT13DPT(regs, iface_type[7], 0);
+
+ SET_INT13DPT(regs, device_path, slave);
+
+ SET_INT13DPT(regs, checksum
+ , -checksum_far(regs->ds, (void*)(regs->si+30), 35));
+
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+// IBM/MS extended media change
+static void
+disk_1349(struct bregs *regs, u8 device)
+{
+ // Always success for HD
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+static void
+disk_134e01(struct bregs *regs, u8 device)
+{
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+static void
+disk_134e03(struct bregs *regs, u8 device)
+{
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+static void
+disk_134e04(struct bregs *regs, u8 device)
+{
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+static void
+disk_134e06(struct bregs *regs, u8 device)
+{
+ disk_ret(regs, DISK_RET_SUCCESS);
+}
+
+static void
+disk_134eXX(struct bregs *regs, u8 device)
+{
+ disk_ret(regs, DISK_RET_EPARAM);
+}
+
+// IBM/MS set hardware configuration
+static void
+disk_134e(struct bregs *regs, u8 device)
+{
+ switch (regs->al) {
+ case 0x01: disk_134e01(regs, device); break;
+ case 0x03: disk_134e03(regs, device); break;
+ case 0x04: disk_134e04(regs, device); break;
+ case 0x06: disk_134e06(regs, device); break;
+ default: disk_134eXX(regs, device); break;
+ }
+}
+
+void
+disk_13XX(struct bregs *regs, u8 device)
+{
+ disk_ret(regs, DISK_RET_EPARAM);
+}
+
+void
+disk_13(struct bregs *regs, u8 device)
+{
+ //debug_stub(regs);
+
+ // clear completion flag
+ SET_BDA(disk_interrupt_flag, 0);
+
+ switch (regs->ah) {
+ case 0x00: disk_1300(regs, device); break;
+ case 0x01: disk_1301(regs, device); break;
+ case 0x02: disk_1302(regs, device); break;
+ case 0x03: disk_1303(regs, device); break;
+ case 0x04: disk_1304(regs, device); break;
+ case 0x05: disk_1305(regs, device); break;
+ case 0x08: disk_1308(regs, device); break;
+ case 0x09: disk_1309(regs, device); break;
+ case 0x0c: disk_130c(regs, device); break;
+ case 0x0d: disk_130d(regs, device); break;
+ case 0x10: disk_1310(regs, device); break;
+ case 0x11: disk_1311(regs, device); break;
+ case 0x14: disk_1314(regs, device); break;
+ case 0x15: disk_1315(regs, device); break;
+ case 0x41: disk_1341(regs, device); break;
+ case 0x42: disk_1342(regs, device); break;
+ case 0x43: disk_1343(regs, device); break;
+ case 0x44: disk_1344(regs, device); break;
+ case 0x45: disk_1345(regs, device); break;
+ case 0x46: disk_1346(regs, device); break;
+ case 0x47: disk_1347(regs, device); break;
+ case 0x48: disk_1348(regs, device); break;
+ case 0x49: disk_1349(regs, device); break;
+ case 0x4e: disk_134e(regs, device); break;
+ default: disk_13XX(regs, device); break;
+ }
+}
+
+
+/****************************************************************
+ * Entry points
+ ****************************************************************/
+
+static int
+get_device(struct bregs *regs, u8 iscd, u8 drive)
+{
+ // basic check : device has to be defined
+ if (drive >= ARRAY_SIZE(Drives.idmap[0])) {
+ disk_ret(regs, DISK_RET_EPARAM);
+ return -1;
+ }
+
+ // Get the ata channel
+ u8 driveid = GET_GLOBAL(Drives.idmap[iscd][drive]);
+
+ // basic check : device has to be valid
+ if (driveid >= ARRAY_SIZE(Drives.drives)) {
+ disk_ret(regs, DISK_RET_EPARAM);
+ return -1;
+ }
+
+ return driveid;
}
static void
floppy_13(regs, drive);
return;
}
-#if BX_USE_ATADRV
- if (drive >= 0xE0) {
- int13_cdrom(regs); // xxx
+
+ if (! CONFIG_DRIVES) {
+ // XXX - old code had other disk access method.
+ disk_ret(regs, DISK_RET_EPARAM);
return;
}
-#endif
- disk_13(regs, drive);
+ if (drive >= 0xe0) {
+ int driveid = get_device(regs, 1, drive - 0xe0);
+ if (driveid < 0)
+ return;
+ cdrom_13(regs, driveid);
+ return;
+ }
+
+ int driveid = get_device(regs, 0, drive - 0x80);
+ if (driveid < 0)
+ return;
+ disk_13(regs, driveid);
}
-void VISIBLE
+void VISIBLE16
handle_40(struct bregs *regs)
{
- debug_enter(regs);
+ debug_enter(regs, DEBUG_HDL_40);
handle_legacy_disk(regs, regs->dl);
- debug_exit(regs);
}
// INT 13h Fixed Disk Services Entry Point
-void VISIBLE
+void VISIBLE16
handle_13(struct bregs *regs)
{
- debug_enter(regs);
+ debug_enter(regs, DEBUG_HDL_13);
u8 drive = regs->dl;
-#if BX_ELTORITO_BOOT
- if (regs->ah >= 0x4a || regs->ah <= 0x4d) {
- int13_eltorito(regs);
- } else if (cdemu_isactive() && cdrom_emulated_drive()) {
- int13_cdemu(regs);
- } else
-#endif
- handle_legacy_disk(regs, drive);
- debug_exit(regs);
+
+ if (CONFIG_CDROM_EMU) {
+ if (regs->ah == 0x4b) {
+ cdemu_134b(regs);
+ return;
+ }
+ u16 ebda_seg = get_ebda_seg();
+ if (GET_EBDA2(ebda_seg, cdemu.active)) {
+ u8 emudrive = GET_EBDA2(ebda_seg, cdemu.emulated_drive);
+ if (drive == emudrive) {
+ cdemu_13(regs);
+ return;
+ }
+ if (drive < 0xe0 && ((emudrive ^ drive) & 0x80) == 0)
+ drive--;
+ }
+ }
+ handle_legacy_disk(regs, drive);
}
// record completion in BIOS task complete flag
-void VISIBLE
-handle_76(struct bregs *regs)
+void VISIBLE16
+handle_76()
{
- debug_enter(regs);
- SET_BDA(floppy_harddisk_info, 0xff);
- eoi_both_pics();
+ debug_isr(DEBUG_ISR_76);
+ 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