* Helper functions
****************************************************************/
-static inline void
-disk_ret(struct bregs *regs, u8 code)
-{
- regs->ah = code;
- SET_BDA(disk_last_status, code);
- set_cf(regs, code);
-}
-
#define DISK_STUB(regs) do { \
struct bregs *__regs = (regs); \
debug_stub(__regs); \
disk_ret(regs, DISK_RET_SUCCESS);
}
-static void
+void
emu_access(struct bregs *regs, u8 device, u16 command)
{
u16 nbsectors = regs->al;
disk_ret(regs, DISK_RET_SUCCESS);
}
-static void
+void
extended_access(struct bregs *regs, u8 device, u16 command)
{
u16 count = GET_INT13EXT(regs, count);
}
}
-static void
+void
disk_13XX(struct bregs *regs, u8 device)
{
debug_stub(regs);
disk_ret(regs, DISK_RET_EPARAM);
}
-static void
+void
disk_13(struct bregs *regs, u8 device)
{
//debug_stub(regs);
}
-/****************************************************************
- * CDROM functions
- ****************************************************************/
-
-// read disk drive size
-static void
-cdrom_1315(struct bregs *regs, u8 device)
-{
- disk_ret(regs, DISK_RET_EADDRNOTFOUND);
-}
-
-// lock
-static void
-cdrom_134500(struct bregs *regs, u8 device)
-{
- u8 locks = GET_EBDA(ata.devices[device].lock);
- if (locks == 0xff) {
- regs->al = 1;
- disk_ret(regs, DISK_RET_ETOOMANYLOCKS);
- return;
- }
- SET_EBDA(ata.devices[device].lock, locks + 1);
- regs->al = 1;
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-// unlock
-static void
-cdrom_134501(struct bregs *regs, u8 device)
-{
- u8 locks = GET_EBDA(ata.devices[device].lock);
- if (locks == 0x00) {
- regs->al = 0;
- disk_ret(regs, DISK_RET_ENOTLOCKED);
- return;
- }
- locks--;
- SET_EBDA(ata.devices[device].lock, locks);
- regs->al = (locks ? 1 : 0);
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-// status
-static void
-cdrom_134502(struct bregs *regs, u8 device)
-{
- u8 locks = GET_EBDA(ata.devices[device].lock);
- regs->al = (locks ? 1 : 0);
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-static void
-cdrom_1345XX(struct bregs *regs, u8 device)
-{
- disk_ret(regs, DISK_RET_EPARAM);
-}
-
-// IBM/MS lock/unlock drive
-static void
-cdrom_1345(struct bregs *regs, u8 device)
-{
- switch (regs->al) {
- case 0x00: cdrom_134500(regs, device); break;
- case 0x01: cdrom_134501(regs, device); break;
- case 0x02: cdrom_134502(regs, device); break;
- default: cdrom_1345XX(regs, device); break;
- }
-}
-
-// IBM/MS eject media
-static void
-cdrom_1346(struct bregs *regs, u8 device)
-{
- u8 locks = GET_EBDA(ata.devices[device].lock);
- if (locks != 0) {
- disk_ret(regs, DISK_RET_ELOCKED);
- return;
- }
-
- // FIXME should handle 0x31 no media in device
- // FIXME should handle 0xb5 valid request failed
-
- // Call removable media eject
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.ah = 0x52;
- call16_int(0x15, &br);
-
- if (br.ah || br.flags & F_CF) {
- disk_ret(regs, DISK_RET_ELOCKED);
- return;
- }
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-// IBM/MS extended media change
-static void
-cdrom_1349(struct bregs *regs, u8 device)
-{
- // always send changed ??
- regs->ah = DISK_RET_ECHANGED;
- set_cf(regs, 1);
-}
-
-static void
-cdrom_ok(struct bregs *regs, u8 device)
-{
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-static void
-cdrom_wp(struct bregs *regs, u8 device)
-{
- disk_ret(regs, DISK_RET_EWRITEPROTECT);
-}
-
-static void
-cdrom_13(struct bregs *regs, u8 device)
-{
- //debug_stub(regs);
-
- switch (regs->ah) {
- case 0x15: cdrom_1315(regs, device); break;
- case 0x45: cdrom_1345(regs, device); break;
- case 0x46: cdrom_1346(regs, device); break;
- case 0x49: cdrom_1349(regs, device); break;
-
- // These functions are the same as for hard disks
- case 0x01: disk_1301(regs, device); break;
- case 0x41: disk_1341(regs, device); break;
- case 0x42: disk_1342(regs, device); break;
- case 0x44: disk_1344(regs, device); break;
- case 0x47: disk_1347(regs, device); break;
- case 0x48: disk_1348(regs, device); break;
- case 0x4e: disk_134e(regs, device); break;
-
- // all these functions return SUCCESS
- case 0x00: cdrom_ok(regs, device); break; // disk controller reset
- case 0x09: cdrom_ok(regs, device); break; // initialize drive parameters
- case 0x0c: cdrom_ok(regs, device); break; // seek to specified cylinder
- case 0x0d: cdrom_ok(regs, device); break; // alternate disk reset
- case 0x10: cdrom_ok(regs, device); break; // check drive ready
- case 0x11: cdrom_ok(regs, device); break; // recalibrate
- case 0x14: cdrom_ok(regs, device); break; // controller internal diagnostic
- case 0x16: cdrom_ok(regs, device); break; // detect disk change
-
- // all these functions return disk write-protected
- case 0x03: cdrom_wp(regs, device); break; // write disk sectors
- case 0x05: cdrom_wp(regs, device); break; // format disk track
- case 0x43: cdrom_wp(regs, device); break; // IBM/MS extended write
-
- default: disk_13XX(regs, device); break;
- }
-}
-
-
-/****************************************************************
- * CD emulation
- ****************************************************************/
-
-// read disk sectors
-static void
-cdemu_1302(struct bregs *regs, u8 device)
-{
- emu_access(regs, device, ATA_CMD_READ_SECTORS);
-}
-
-// verify disk sectors
-static void
-cdemu_1304(struct bregs *regs, u8 device)
-{
- emu_access(regs, device, 0);
-}
-
-// read disk drive parameters
-static void
-cdemu_1308(struct bregs *regs, u8 device)
-{
- u16 nlc = GET_EBDA(cdemu.vdevice.cylinders) - 1;
- u16 nlh = GET_EBDA(cdemu.vdevice.heads) - 1;
- u16 nlspt = GET_EBDA(cdemu.vdevice.spt);
-
- regs->al = 0x00;
- regs->bl = 0x00;
- regs->ch = nlc & 0xff;
- regs->cl = ((nlc >> 2) & 0xc0) | (nlspt & 0x3f);
- regs->dh = nlh;
- // FIXME ElTorito Various. should send the real count of drives 1 or 2
- // FIXME ElTorito Harddisk. should send the HD count
- regs->dl = 0x02;
- u8 media = GET_EBDA(cdemu.media);
- if (media <= 3)
- regs->bl = media * 2;
-
- regs->es = SEG_BIOS;
- regs->di = (u16)&diskette_param_table2;
-
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-static void
-cdemu_13(struct bregs *regs)
-{
- //debug_stub(regs);
-
- u8 device = GET_EBDA(cdemu.controller_index) * 2;
- device += GET_EBDA(cdemu.device_spec);
-
- switch (regs->ah) {
- case 0x02: cdemu_1302(regs, device); break;
- case 0x04: cdemu_1304(regs, device); break;
- case 0x08: cdemu_1308(regs, device); break;
- // XXX - All other calls get passed to standard CDROM functions.
- default: cdrom_13(regs, device); break;
- }
-}
-
-struct eltorito_s {
- u8 size;
- u8 media;
- u8 emulated_drive;
- u8 controller_index;
- u32 ilba;
- u16 device_spec;
- u16 buffer_segment;
- u16 load_segment;
- u16 sector_count;
- u8 cylinders;
- u8 sectors;
- u8 heads;
-};
-
-#define SET_INT13ET(regs,var,val) \
- SET_FARVAR((regs)->ds, ((struct eltorito_s*)((regs)->si+0))->var, (val))
-
-// ElTorito - Terminate disk emu
-static void
-cdemu_134b(struct bregs *regs)
-{
- // FIXME ElTorito Hardcoded
- SET_INT13ET(regs, size, 0x13);
- SET_INT13ET(regs, media, GET_EBDA(cdemu.media));
- SET_INT13ET(regs, emulated_drive, GET_EBDA(cdemu.emulated_drive));
- SET_INT13ET(regs, controller_index, GET_EBDA(cdemu.controller_index));
- SET_INT13ET(regs, ilba, GET_EBDA(cdemu.ilba));
- SET_INT13ET(regs, device_spec, GET_EBDA(cdemu.device_spec));
- SET_INT13ET(regs, buffer_segment, GET_EBDA(cdemu.buffer_segment));
- SET_INT13ET(regs, load_segment, GET_EBDA(cdemu.load_segment));
- SET_INT13ET(regs, sector_count, GET_EBDA(cdemu.sector_count));
- SET_INT13ET(regs, cylinders, GET_EBDA(cdemu.vdevice.cylinders));
- SET_INT13ET(regs, sectors, GET_EBDA(cdemu.vdevice.spt));
- SET_INT13ET(regs, heads, GET_EBDA(cdemu.vdevice.heads));
-
- // If we have to terminate emulation
- if (regs->al == 0x00) {
- // FIXME ElTorito Various. Should be handled accordingly to spec
- SET_EBDA(cdemu.active, 0x00); // bye bye
- }
-
- disk_ret(regs, DISK_RET_SUCCESS);
-}
-
-
/****************************************************************
* Entry points
****************************************************************/
projects / seabios.git / blobdiff