Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 281 insertions, 0 deletions

diff --git a/qemu/roms/seabios/src/cdrom.c b/qemu/roms/seabios/src/cdrom.c
new file mode 100644
index 000000000..92f34f42b
--- /dev/null
+++ b/qemu/roms/seabios/src/cdrom.c
@@ -0,0 +1,281 @@
+// Support for booting from cdroms (the "El Torito" spec).
+//
+// Copyright (C) 2008,2009  Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2002  MandrakeSoft S.A.
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "biosvar.h" // GET_GLOBAL
+#include "block.h" // struct drive_s
+#include "bregs.h" // struct bregs
+#include "hw/ata.h" // ATA_CMD_REQUEST_SENSE
+#include "hw/blockcmd.h" // CDB_CMD_REQUEST_SENSE
+#include "malloc.h" // free
+#include "output.h" // dprintf
+#include "std/disk.h" // DISK_RET_SUCCESS
+#include "string.h" // memset
+#include "util.h" // cdrom_prepboot
+
+// Locks for removable devices
+u8 CDRom_locks[BUILD_MAX_EXTDRIVE] VARLOW;
+
+
+/****************************************************************
+ * CD emulation
+ ****************************************************************/
+
+struct eltorito_s CDEmu VARLOW = { .size=sizeof(CDEmu) };
+struct drive_s *emulated_drive_gf VARLOW;
+struct drive_s *cdemu_drive_gf VARFSEG;
+
+static int
+cdemu_read(struct disk_op_s *op)
+{
+    struct drive_s *drive_gf = GET_LOW(emulated_drive_gf);
+    struct disk_op_s dop;
+    dop.drive_gf = drive_gf;
+    dop.command = op->command;
+    dop.lba = GET_LOW(CDEmu.ilba) + op->lba / 4;
+
+    int count = op->count;
+    op->count = 0;
+    u8 *cdbuf_fl = GET_GLOBAL(bounce_buf_fl);
+
+    if (op->lba & 3) {
+        // Partial read of first block.
+        dop.count = 1;
+        dop.buf_fl = cdbuf_fl;
+        int ret = process_op(&dop);
+        if (ret)
+            return ret;
+        u8 thiscount = 4 - (op->lba & 3);
+        if (thiscount > count)
+            thiscount = count;
+        count -= thiscount;
+        memcpy_fl(op->buf_fl, cdbuf_fl + (op->lba & 3) * 512, thiscount * 512);
+        op->buf_fl += thiscount * 512;
+        op->count += thiscount;
+        dop.lba++;
+    }
+
+    if (count > 3) {
+        // Read n number of regular blocks.
+        dop.count = count / 4;
+        dop.buf_fl = op->buf_fl;
+        int ret = process_op(&dop);
+        op->count += dop.count * 4;
+        if (ret)
+            return ret;
+        u8 thiscount = count & ~3;
+        count &= 3;
+        op->buf_fl += thiscount * 512;
+        dop.lba += thiscount / 4;
+    }
+
+    if (count) {
+        // Partial read on last block.
+        dop.count = 1;
+        dop.buf_fl = cdbuf_fl;
+        int ret = process_op(&dop);
+        if (ret)
+            return ret;
+        u8 thiscount = count;
+        memcpy_fl(op->buf_fl, cdbuf_fl, thiscount * 512);
+        op->count += thiscount;
+    }
+
+    return DISK_RET_SUCCESS;
+}
+
+int
+process_cdemu_op(struct disk_op_s *op)
+{
+    if (!CONFIG_CDROM_EMU)
+        return 0;
+
+    switch (op->command) {
+    case CMD_READ:
+        return cdemu_read(op);
+    case CMD_WRITE:
+    case CMD_FORMAT:
+        return DISK_RET_EWRITEPROTECT;
+    case CMD_VERIFY:
+    case CMD_RESET:
+    case CMD_SEEK:
+    case CMD_ISREADY:
+        return DISK_RET_SUCCESS;
+    default:
+        return DISK_RET_EPARAM;
+    }
+}
+
+void
+cdrom_prepboot(void)
+{
+    if (!CONFIG_CDROM_EMU)
+        return;
+    if (!CDCount)
+        return;
+    if (create_bounce_buf() < 0)
+        return;
+
+    struct drive_s *drive = malloc_fseg(sizeof(*drive));
+    if (!drive) {
+        warn_noalloc();
+        free(drive);
+        return;
+    }
+    cdemu_drive_gf = drive;
+    memset(drive, 0, sizeof(*drive));
+    drive->type = DTYPE_CDEMU;
+    drive->blksize = DISK_SECTOR_SIZE;
+    drive->sectors = (u64)-1;
+}
+
+
+/****************************************************************
+ * CD booting
+ ****************************************************************/
+
+int
+cdrom_boot(struct drive_s *drive)
+{
+    ASSERT32FLAT();
+    struct disk_op_s dop;
+    int cdid = getDriveId(EXTTYPE_CD, drive);
+    memset(&dop, 0, sizeof(dop));
+    dop.drive_gf = drive;
+    if (!dop.drive_gf || 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.command = CMD_READ;
+    dop.lba = 0x11;
+    dop.count = 1;
+    dop.buf_fl = buffer;
+    ret = scsi_process_op(&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 = scsi_process_op(&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
+
+    // Fill in el-torito cdrom emulation fields.
+    emulated_drive_gf = drive;
+    u8 media = buffer[0x21];
+
+    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;
+
+    CDEmu.controller_index = drive->cntl_id / 2;
+    CDEmu.device_spec = drive->cntl_id % 2;
+
+    // And we read the image in memory
+    nbsectors = DIV_ROUND_UP(nbsectors, 4);
+    dop.lba = lba;
+    dop.buf_fl = MAKE_FLATPTR(boot_segment, 0);
+    while (nbsectors) {
+        int count = nbsectors;
+        if (count > 64*1024/CDROM_SECTOR_SIZE)
+            count = 64*1024/CDROM_SECTOR_SIZE;
+        dop.count = count;
+        ret = scsi_process_op(&dop);
+        if (ret)
+            return 12;
+        nbsectors -= count;
+        dop.lba += count;
+        dop.buf_fl += count*CDROM_SECTOR_SIZE;
+    }
+
+    if (media == 0) {
+        // No emulation requested - return success.
+        CDEmu.emulated_drive = 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_drive = 0x00;
+        // XXX - get and set actual floppy count.
+        set_equipment_flags(0x41, 0x41);
+
+        switch (media) {
+        case 0x01:  // 1.2M floppy
+            CDEmu.chs.sptcyl = 15;
+            CDEmu.chs.cyllow = 79;
+            CDEmu.chs.heads = 1;
+            break;
+        case 0x02:  // 1.44M floppy
+            CDEmu.chs.sptcyl = 18;
+            CDEmu.chs.cyllow = 79;
+            CDEmu.chs.heads = 1;
+            break;
+        case 0x03:  // 2.88M floppy
+            CDEmu.chs.sptcyl = 36;
+            CDEmu.chs.cyllow = 79;
+            CDEmu.chs.heads = 1;
+            break;
+        }
+    } else {
+        // Harddrive emulation
+        CDEmu.emulated_drive = 0x80;
+        SET_BDA(hdcount, GET_BDA(hdcount) + 1);
+
+        // Peak at partition table to get chs.
+        struct mbr_s *mbr = MAKE_FLATPTR(boot_segment, 0);
+        CDEmu.chs = mbr->partitions[0].last;
+    }
+
+    // everything is ok, so from now on, the emulation is active
+    CDEmu.media = media;
+    dprintf(6, "cdemu media=%d\n", media);
+
+    return 0;
+}