cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

cdrom.c (4185B)

      1/*
      2 * QEMU ATAPI CD-ROM Emulator
      3 *
      4 * Copyright (c) 2006 Fabrice Bellard
      5 *
      6 * Permission is hereby granted, free of charge, to any person obtaining a copy
      7 * of this software and associated documentation files (the "Software"), to deal
      8 * in the Software without restriction, including without limitation the rights
      9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10 * copies of the Software, and to permit persons to whom the Software is
     11 * furnished to do so, subject to the following conditions:
     12 *
     13 * The above copyright notice and this permission notice shall be included in
     14 * all copies or substantial portions of the Software.
     15 *
     16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22 * THE SOFTWARE.
     23 */
     24
     25/* ??? Most of the ATAPI emulation is still in ide.c.  It should be moved
     26   here.  */
     27
     28#include "qemu/osdep.h"
     29#include "hw/scsi/scsi.h"
     30
     31static void lba_to_msf(uint8_t *buf, int lba)
     32{
     33    lba += 150;
     34    buf[0] = (lba / 75) / 60;
     35    buf[1] = (lba / 75) % 60;
     36    buf[2] = lba % 75;
     37}
     38
     39/* same toc as bochs. Return -1 if error or the toc length */
     40/* XXX: check this */
     41int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track)
     42{
     43    uint8_t *q;
     44    int len;
     45
     46    if (start_track > 1 && start_track != 0xaa)
     47        return -1;
     48    q = buf + 2;
     49    *q++ = 1; /* first session */
     50    *q++ = 1; /* last session */
     51    if (start_track <= 1) {
     52        *q++ = 0; /* reserved */
     53        *q++ = 0x14; /* ADR, control */
     54        *q++ = 1;    /* track number */
     55        *q++ = 0; /* reserved */
     56        if (msf) {
     57            *q++ = 0; /* reserved */
     58            lba_to_msf(q, 0);
     59            q += 3;
     60        } else {
     61            /* sector 0 */
     62            stl_be_p(q, 0);
     63            q += 4;
     64        }
     65    }
     66    /* lead out track */
     67    *q++ = 0; /* reserved */
     68    *q++ = 0x16; /* ADR, control */
     69    *q++ = 0xaa; /* track number */
     70    *q++ = 0; /* reserved */
     71    if (msf) {
     72        *q++ = 0; /* reserved */
     73        lba_to_msf(q, nb_sectors);
     74        q += 3;
     75    } else {
     76        stl_be_p(q, nb_sectors);
     77        q += 4;
     78    }
     79    len = q - buf;
     80    stw_be_p(buf, len - 2);
     81    return len;
     82}
     83
     84/* mostly same info as PearPc */
     85int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num)
     86{
     87    uint8_t *q;
     88    int len;
     89
     90    q = buf + 2;
     91    *q++ = 1; /* first session */
     92    *q++ = 1; /* last session */
     93
     94    *q++ = 1; /* session number */
     95    *q++ = 0x14; /* data track */
     96    *q++ = 0; /* track number */
     97    *q++ = 0xa0; /* lead-in */
     98    *q++ = 0; /* min */
     99    *q++ = 0; /* sec */
    100    *q++ = 0; /* frame */
    101    *q++ = 0;
    102    *q++ = 1; /* first track */
    103    *q++ = 0x00; /* disk type */
    104    *q++ = 0x00;
    105
    106    *q++ = 1; /* session number */
    107    *q++ = 0x14; /* data track */
    108    *q++ = 0; /* track number */
    109    *q++ = 0xa1;
    110    *q++ = 0; /* min */
    111    *q++ = 0; /* sec */
    112    *q++ = 0; /* frame */
    113    *q++ = 0;
    114    *q++ = 1; /* last track */
    115    *q++ = 0x00;
    116    *q++ = 0x00;
    117
    118    *q++ = 1; /* session number */
    119    *q++ = 0x14; /* data track */
    120    *q++ = 0; /* track number */
    121    *q++ = 0xa2; /* lead-out */
    122    *q++ = 0; /* min */
    123    *q++ = 0; /* sec */
    124    *q++ = 0; /* frame */
    125    if (msf) {
    126        *q++ = 0; /* reserved */
    127        lba_to_msf(q, nb_sectors);
    128        q += 3;
    129    } else {
    130        stl_be_p(q, nb_sectors);
    131        q += 4;
    132    }
    133
    134    *q++ = 1; /* session number */
    135    *q++ = 0x14; /* ADR, control */
    136    *q++ = 0;    /* track number */
    137    *q++ = 1;    /* point */
    138    *q++ = 0; /* min */
    139    *q++ = 0; /* sec */
    140    *q++ = 0; /* frame */
    141    if (msf) {
    142        *q++ = 0;
    143        lba_to_msf(q, 0);
    144        q += 3;
    145    } else {
    146        *q++ = 0;
    147        *q++ = 0;
    148        *q++ = 0;
    149        *q++ = 0;
    150    }
    151
    152    len = q - buf;
    153    stw_be_p(buf, len - 2);
    154    return len;
    155}