void
__disk_ret_unimplemented(struct bregs *regs, u32 linecode, const char *fname)
{
u8 code = linecode;
if (regs->dl < EXTSTART_HD)
SET_BDA(floppy_last_status, code);
else
SET_BDA(disk_last_status, code);
__set_code_unimplemented(regs, linecode, fname);
}
void
kbd_init(void)
{
dprintf(3, "init keyboard\n");
u16 x = offsetof(struct bios_data_area_s, kbd_buf);
SET_BDA(kbd_flag2, KF2_101KBD);
SET_BDA(kbd_buf_head, x);
SET_BDA(kbd_buf_tail, x);
SET_BDA(kbd_buf_start_offset, x);
SET_BDA(kbd_buf_end_offset
, x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
}
void
__disk_ret(struct bregs *regs, u32 linecode, const char *fname)
{
u8 code = linecode;
if (regs->dl < EXTSTART_HD)
SET_BDA(floppy_last_status, code);
else
SET_BDA(disk_last_status, code);
if (code)
__set_code_invalid(regs, linecode, fname);
else
set_code_success(regs);
}
// record completion in BIOS task complete flag
void VISIBLE16
handle_76()
{
debug_isr(DEBUG_ISR_76);
SET_BDA(disk_interrupt_flag, 0xff);
eoi_pic2();
}
static void
bda_init(void)
{
dprintf(3, "init bda\n");
struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
memset(bda, 0, sizeof(*bda));
#if CONFIG_INT10_SERIAL_CONSOLE
// set the default INT10 to serial console value
#if CONFIG_CHECK_CMOS_SETTING_FOR_CONSOLE_ENABLE
if (!cmos_serial_console_debug_level)
SET_BDA(video_mode, UART_OUTPUT_DISABLED);
else
SET_BDA(video_mode, UART_OUTPUT_ENABLED);
#else
SET_BDA(video_mode, UART_OUTPUT_ENABLED);
#endif
#endif
int esize = EBDA_SIZE_START;
u16 ebda_seg = EBDA_SEGMENT_START;
extern u8 final_varlow_start[];
if (!CONFIG_MALLOC_UPPERMEMORY)
ebda_seg = FLATPTR_TO_SEG(ALIGN_DOWN((u32)final_varlow_start, 1024)
- EBDA_SIZE_START*1024);
SET_BDA(ebda_seg, ebda_seg);
SET_BDA(mem_size_kb, ebda_seg / (1024/16));
// Init ebda
struct extended_bios_data_area_s *ebda = get_ebda_ptr();
memset(ebda, 0, sizeof(*ebda));
ebda->size = esize;
add_e820((u32)ebda, BUILD_LOWRAM_END-(u32)ebda, E820_RESERVED);
// Init extra stack
StackPos = (void*)(&ExtraStack[BUILD_EXTRA_STACK_SIZE] - zonelow_base);
}
static void
dequeue_key(struct bregs *regs, int incr, int extended)
{
yield();
u16 buffer_head;
u16 buffer_tail;
for (;;) {
buffer_head = GET_BDA(kbd_buf_head);
buffer_tail = GET_BDA(kbd_buf_tail);
if (buffer_head != buffer_tail)
break;
if (!incr) {
regs->flags |= F_ZF;
return;
}
yield_toirq();
}
u16 keycode = GET_FARVAR(SEG_BDA, *(u16*)(buffer_head+0));
u8 ascii = keycode & 0xff;
if (!extended) {
// Translate extended keys
if (ascii == 0xe0 && keycode & 0xff00)
keycode &= 0xff00;
else if (keycode == 0xe00d || keycode == 0xe00a)
// Extended enter key
keycode = 0x1c00 | ascii;
else if (keycode == 0xe02f)
// Extended '/' key
keycode = 0x352f;
// Technically, if the ascii value is 0xf0 or if the
// 'scancode' is greater than 0x84 then the key should be
// discarded. However, there seems no harm in passing on the
// extended values in these cases.
}
if (ascii == 0xf0 && keycode & 0xff00)
keycode &= 0xff00;
regs->ax = keycode;
if (!incr) {
regs->flags &= ~F_ZF;
return;
}
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
buffer_head += 2;
if (buffer_head >= buffer_end)
buffer_head = buffer_start;
SET_BDA(kbd_buf_head, buffer_head);
}
static void
init_bda(void)
{
dprintf(3, "init bda\n");
struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
memset(bda, 0, sizeof(*bda));
int esize = EBDA_SIZE_START;
SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
u16 ebda_seg = EBDA_SEGMENT_START;
SET_BDA(ebda_seg, ebda_seg);
// Init ebda
struct extended_bios_data_area_s *ebda = get_ebda_ptr();
memset(ebda, 0, sizeof(*ebda));
ebda->size = esize;
add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA(ebda_seg, size) * 1024
, E820_RESERVED);
// Init extra stack
StackPos = (void*)(&ExtraStack[BUILD_EXTRA_STACK_SIZE] - datalow_base);
}
static void
vbe_104f10(struct bregs *regs)
{
switch (regs->bl) {
case 0x00:
regs->bx = 0x0f30;
break;
case 0x01:
SET_BDA(vbe_flag, regs->bh);
break;
case 0x02:
regs->bh = GET_BDA(vbe_flag);
break;
default:
regs->ax = 0x014f;
return;
}
regs->ax = 0x004f;
}
static u8
enqueue_key(u16 keycode)
{
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
u16 buffer_head = GET_BDA(kbd_buf_head);
u16 buffer_tail = GET_BDA(kbd_buf_tail);
u16 temp_tail = buffer_tail;
buffer_tail += 2;
if (buffer_tail >= buffer_end)
buffer_tail = buffer_start;
if (buffer_tail == buffer_head)
return 0;
SET_FARVAR(SEG_BDA, *(u16*)(temp_tail+0), keycode);
SET_BDA(kbd_buf_tail, buffer_tail);
return 1;
}
static void
dequeue_key(struct bregs *regs, int incr, int extended)
{
yield();
u16 buffer_head;
u16 buffer_tail;
for (;;) {
buffer_head = GET_BDA(kbd_buf_head);
buffer_tail = GET_BDA(kbd_buf_tail);
if (buffer_head != buffer_tail)
break;
if (!incr) {
regs->flags |= F_ZF;
return;
}
yield_toirq();
}
u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0));
u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1));
if ((ascii_code == 0xF0 && scan_code != 0)
|| (ascii_code == 0xE0 && !extended))
ascii_code = 0;
regs->ax = (scan_code << 8) | ascii_code;
if (!incr) {
regs->flags &= ~F_ZF;
return;
}
u16 buffer_start = GET_BDA(kbd_buf_start_offset);
u16 buffer_end = GET_BDA(kbd_buf_end_offset);
buffer_head += 2;
if (buffer_head >= buffer_end)
buffer_head = buffer_start;
SET_BDA(kbd_buf_head, buffer_head);
}
static void
disk_13(struct bregs *regs, struct drive_s *drive_gf)
{
//debug_stub(regs);
// clear completion flag
SET_BDA(disk_interrupt_flag, 0);
switch (regs->ah) {
case 0x00: disk_1300(regs, drive_gf); break;
case 0x01: disk_1301(regs, drive_gf); break;
case 0x02: disk_1302(regs, drive_gf); break;
case 0x03: disk_1303(regs, drive_gf); break;
case 0x04: disk_1304(regs, drive_gf); break;
case 0x05: disk_1305(regs, drive_gf); break;
case 0x08: disk_1308(regs, drive_gf); break;
case 0x09: disk_1309(regs, drive_gf); break;
case 0x0c: disk_130c(regs, drive_gf); break;
case 0x0d: disk_130d(regs, drive_gf); break;
case 0x10: disk_1310(regs, drive_gf); break;
case 0x11: disk_1311(regs, drive_gf); break;
case 0x14: disk_1314(regs, drive_gf); break;
case 0x15: disk_1315(regs, drive_gf); break;
case 0x16: disk_1316(regs, drive_gf); break;
case 0x41: disk_1341(regs, drive_gf); break;
case 0x42: disk_1342(regs, drive_gf); break;
case 0x43: disk_1343(regs, drive_gf); break;
case 0x44: disk_1344(regs, drive_gf); break;
case 0x45: disk_1345(regs, drive_gf); break;
case 0x46: disk_1346(regs, drive_gf); break;
case 0x47: disk_1347(regs, drive_gf); break;
case 0x48: disk_1348(regs, drive_gf); break;
case 0x49: disk_1349(regs, drive_gf); break;
case 0x4e: disk_134e(regs, drive_gf); break;
default: disk_13XX(regs, drive_gf); break;
}
}
int
cdrom_boot(struct drive_s *drive_g)
{
ASSERT32FLAT();
struct disk_op_s dop;
int cdid = getDriveId(EXTTYPE_CD, drive_g);
memset(&dop, 0, sizeof(dop));
dop.drive_g = drive_g;
if (!dop.drive_g || cdid < 0)
return 1;
int ret = scsi_is_ready(&dop);
if (ret)
dprintf(1, "scsi_is_ready returned %d\n", ret);
// Read the Boot Record Volume Descriptor
u8 buffer[CDROM_SECTOR_SIZE];
dop.lba = 0x11;
dop.count = 1;
dop.buf_fl = buffer;
ret = cdb_read(&dop);
if (ret)
return 3;
// Validity checks
if (buffer[0])
return 4;
if (strcmp((char*)&buffer[1], "CD001\001EL TORITO SPECIFICATION") != 0)
return 5;
// ok, now we calculate the Boot catalog address
u32 lba = *(u32*)&buffer[0x47];
// And we read the Boot Catalog
dop.lba = lba;
dop.count = 1;
ret = cdb_read(&dop);
if (ret)
return 7;
// Validation entry
if (buffer[0x00] != 0x01)
return 8; // Header
if (buffer[0x01] != 0x00)
return 9; // Platform
if (buffer[0x1E] != 0x55)
return 10; // key 1
if (buffer[0x1F] != 0xAA)
return 10; // key 2
// Initial/Default Entry
if (buffer[0x20] != 0x88)
return 11; // Bootable
u8 media = buffer[0x21];
CDEmu.media = media;
CDEmu.emulated_drive_gf = dop.drive_g;
u16 boot_segment = *(u16*)&buffer[0x22];
if (!boot_segment)
boot_segment = 0x07C0;
CDEmu.load_segment = boot_segment;
CDEmu.buffer_segment = 0x0000;
u16 nbsectors = *(u16*)&buffer[0x26];
CDEmu.sector_count = nbsectors;
lba = *(u32*)&buffer[0x28];
CDEmu.ilba = lba;
// And we read the image in memory
dop.lba = lba;
dop.count = DIV_ROUND_UP(nbsectors, 4);
dop.buf_fl = MAKE_FLATPTR(boot_segment, 0);
ret = cdb_read(&dop);
if (ret)
return 12;
if (media == 0) {
// No emulation requested - return success.
CDEmu.emulated_extdrive = EXTSTART_CD + cdid;
return 0;
}
// Emulation of a floppy/harddisk requested
if (! CONFIG_CDROM_EMU || !cdemu_drive_gf)
return 13;
// Set emulated drive id and increase bios installed hardware
// number of devices
if (media < 4) {
// Floppy emulation
CDEmu.emulated_extdrive = 0x00;
// XXX - get and set actual floppy count.
set_equipment_flags(0x41, 0x41);
switch (media) {
case 0x01: // 1.2M floppy
CDEmu.lchs.spt = 15;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
case 0x02: // 1.44M floppy
CDEmu.lchs.spt = 18;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
case 0x03: // 2.88M floppy
CDEmu.lchs.spt = 36;
CDEmu.lchs.cylinders = 80;
CDEmu.lchs.heads = 2;
break;
}
} else {
// Harddrive emulation
CDEmu.emulated_extdrive = 0x80;
SET_BDA(hdcount, GET_BDA(hdcount) + 1);
// Peak at partition table to get chs.
struct mbr_s *mbr = (void*)0;
u8 sptcyl = GET_FARVAR(boot_segment, mbr->partitions[0].last.sptcyl);
u8 cyllow = GET_FARVAR(boot_segment, mbr->partitions[0].last.cyllow);
u8 heads = GET_FARVAR(boot_segment, mbr->partitions[0].last.heads);
CDEmu.lchs.spt = sptcyl & 0x3f;
CDEmu.lchs.cylinders = ((sptcyl<<2)&0x300) + cyllow + 1;
CDEmu.lchs.heads = heads + 1;
}
// everything is ok, so from now on, the emulation is active
CDEmu.active = 0x01;
dprintf(6, "cdemu media=%d\n", media);
return 0;
}
