#include "disk.h" // cdrom_13
#include "util.h" // memset
#include "ata.h" // ATA_CMD_READ_SECTORS
-
-#define DEBUGF1(fmt, args...) bprintf(0, fmt , ##args)
-#define DEBUGF(fmt, args...)
+#include "bregs.h" // struct bregs
+#include "biosvar.h" // GET_EBDA
/****************************************************************
* 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)
+// Read a series of 512 byte sectors from the cdrom starting at the
+// image offset.
+__always_inline int
+cdrom_read_emu(u16 biosid, u32 vlba, u32 count, void *far_buffer)
{
- emu_access(regs, device, 0);
+ u32 ilba = GET_EBDA(cdemu.ilba);
+ return cdrom_read_512(biosid, ilba * 4 + vlba, count, far_buffer);
}
// read disk drive parameters
regs->bl = media * 2;
regs->es = SEG_BIOS;
- regs->di = (u16)&diskette_param_table2;
+ regs->di = (u32)&diskette_param_table2;
disk_ret(regs, DISK_RET_SUCCESS);
}
device += GET_EBDA(cdemu.device_spec);
switch (regs->ah) {
- case 0x02: cdemu_1302(regs, device); break;
- case 0x04: cdemu_1304(regs, device); break;
+ // These functions are the same as for hard disks
+ case 0x02:
+ case 0x04:
+ disk_13(regs, device);
+ break;
+
+ // These functions are the same as standard CDROM.
+ case 0x00:
+ case 0x01:
+ case 0x03:
+ case 0x05:
+ case 0x09:
+ case 0x0c:
+ case 0x0d:
+ case 0x10:
+ case 0x11:
+ case 0x14:
+ case 0x15:
+ case 0x16:
+ cdrom_13(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;
+
+ default: disk_13XX(regs, device); break;
}
}
****************************************************************/
// Request SENSE
-static u16
+static int
atapi_get_sense(u16 device, u8 *asc, u8 *ascq)
{
u8 buffer[18];
memset(atacmd, 0, sizeof(atacmd));
atacmd[0] = ATA_CMD_REQUEST_SENSE;
atacmd[4] = sizeof(buffer);
- u16 ret = ata_cmd_packet(device, atacmd, sizeof(atacmd)
- , 18L, 0, ATA_DATA_IN, GET_SEG(SS), (u32)buffer);
+ int ret = ata_cmd_packet(device, atacmd, sizeof(atacmd), sizeof(buffer)
+ , MAKE_FARPTR(GET_SEG(SS), (u32)buffer));
if (ret != 0)
- return 0x0002;
+ return ret;
*asc = buffer[12];
*ascq = buffer[13];
return 0;
}
-static u16
+static int
atapi_is_ready(u16 device)
{
if (GET_EBDA(ata.devices[device].type) != ATA_TYPE_ATAPI) {
return -1;
}
- DEBUGF("ata_detect_medium: begin\n");
+ dprintf(6, "ata_detect_medium: begin\n");
u8 packet[12];
memset(packet, 0, sizeof(packet));
packet[0] = 0x25; /* READ CAPACITY */
u8 in_progress = 0;
for (;; time+=100) {
if (time >= timeout) {
- DEBUGF("read capacity failed\n");
+ dprintf(1, "read capacity failed\n");
return -1;
}
- u16 ret = ata_cmd_packet(device, packet, sizeof(packet)
- , 0, 8L, ATA_DATA_IN, GET_SEG(SS), (u32)buf);
+ int ret = ata_cmd_packet(device, packet, sizeof(packet), sizeof(buf)
+ , MAKE_FARPTR(GET_SEG(SS), (u32)buf));
if (ret == 0)
break;
continue;
if (asc == 0x3a) { /* MEDIUM NOT PRESENT */
- DEBUGF("Device reports MEDIUM NOT PRESENT\n");
+ dprintf(1, "Device reports MEDIUM NOT PRESENT\n");
return -1;
}
| (u32) buf[2] << 8
| (u32) buf[3] << 0;
- DEBUGF("sectors=%u\n", sectors);
+ dprintf(6, "sectors=%u\n", sectors);
if (block_len == 2048)
sectors <<= 2; /* # of sectors in 512-byte "soft" sector */
if (sectors != GET_EBDA(ata.devices[device].sectors))
return 0;
}
-static u16
+static int
atapi_is_cdrom(u8 device)
{
if (device >= CONFIG_MAX_ATA_DEVICES)
}
}
-u16
+int
cdrom_boot()
{
// Find out the first cdrom
for (device=0; device<CONFIG_MAX_ATA_DEVICES; device++)
if (atapi_is_cdrom(device))
break;
-
- u16 ret = atapi_is_ready(device);
- if (ret)
- BX_INFO("ata_is_ready returned %d\n", ret);
-
- // if not found
if (device >= CONFIG_MAX_ATA_DEVICES)
+ // cdrom not found
return 2;
+ int ret = atapi_is_ready(device);
+ if (ret)
+ dprintf(1, "atapi_is_ready returned %d\n", ret);
+
// Read the Boot Record Volume Descriptor
u8 buffer[2048];
- ret = cdrom_read(device, 0x11, 2048, GET_SEG(SS), (u32)buffer, 0);
+ ret = cdrom_read(device, 0x11, 1
+ , MAKE_FARPTR(GET_SEG(SS), (u32)buffer));
if (ret)
return 3;
u32 lba = *(u32*)&buffer[0x47];
// And we read the Boot Catalog
- ret = cdrom_read(device, lba, 2048, GET_SEG(SS), (u32)buffer, 0);
+ ret = cdrom_read(device, lba, 1
+ , MAKE_FARPTR(GET_SEG(SS), (u32)buffer));
if (ret)
return 7;
if (buffer[0x20] != 0x88)
return 11; // Bootable
- SET_EBDA(cdemu.media,buffer[0x21]);
- if (buffer[0x21] == 0)
- // FIXME ElTorito Hardcoded. cdrom is hardcoded as device 0xE0.
- // Win2000 cd boot needs to know it booted from cd
- SET_EBDA(cdemu.emulated_drive, 0xE0);
- else if (buffer[0x21] < 4)
- SET_EBDA(cdemu.emulated_drive, 0x00);
- else
- SET_EBDA(cdemu.emulated_drive, 0x80);
+ u8 media = buffer[0x21];
+ SET_EBDA(cdemu.media, media);
SET_EBDA(cdemu.controller_index, device/2);
SET_EBDA(cdemu.device_spec, device%2);
u16 boot_segment = *(u16*)&buffer[0x22];
if (!boot_segment)
boot_segment = 0x07C0;
-
- SET_EBDA(cdemu.load_segment,boot_segment);
- SET_EBDA(cdemu.buffer_segment,0x0000);
+ SET_EBDA(cdemu.load_segment, boot_segment);
+ SET_EBDA(cdemu.buffer_segment, 0x0000);
u16 nbsectors = *(u16*)&buffer[0x26];
SET_EBDA(cdemu.sector_count, nbsectors);
SET_EBDA(cdemu.ilba, lba);
// And we read the image in memory
- ret = cdrom_read(device, lba, nbsectors*512
- , boot_segment, 0, 0);
+ ret = cdrom_read_emu(device, 0, nbsectors, MAKE_FARPTR(boot_segment, 0));
if (ret)
return 12;
+ if (media == 0) {
+ // No emulation requested - return success.
+
+ // FIXME ElTorito Hardcoded. cdrom is hardcoded as device 0xE0.
+ // Win2000 cd boot needs to know it booted from cd
+ SET_EBDA(cdemu.emulated_drive, 0xE0);
+
+ return 0;
+ }
+
+ // Emulation of a floppy/harddisk requested
+ if (! CONFIG_CDROM_EMU)
+ return 13;
+
+ // Set emulated drive id and increase bios installed hardware
+ // number of devices
+ if (media < 4) {
+ // Floppy emulation
+ SET_EBDA(cdemu.emulated_drive, 0x00);
+ SETBITS_BDA(equipment_list_flags, 0x41);
+ } else {
+ // Harddrive emulation
+ SET_EBDA(cdemu.emulated_drive, 0x80);
+ SET_EBDA(ata.hdcount, GET_EBDA(ata.hdcount) + 1);
+ }
+
// Remember the media type
- switch (GET_EBDA(cdemu.media)) {
+ switch (media) {
case 0x01: // 1.2M floppy
SET_EBDA(cdemu.vdevice.spt, 15);
SET_EBDA(cdemu.vdevice.cylinders, 80);
}
}
- if (GET_EBDA(cdemu.media) != 0) {
- // Increase bios installed hardware number of devices
- if (GET_EBDA(cdemu.emulated_drive) == 0x00)
- SETBITS_BDA(equipment_list_flags, 0x41);
- else
- SET_EBDA(ata.hdcount, GET_EBDA(ata.hdcount) + 1);
- }
-
// everything is ok, so from now on, the emulation is active
- if (GET_EBDA(cdemu.media))
- SET_EBDA(cdemu.active, 0x01);
+ SET_EBDA(cdemu.active, 0x01);
+ dprintf(6, "cdemu media=%d\n", media);
return 0;
}
projects / seabios.git / blobdiff