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qemu/hw/ide.c
bellard 1b8eb456eb avoid error if too many sectors in non LBA mode 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@746 c046a42c-6fe2-441c-8c8c-71466251a162
2004-04-25 17:58:25 +00:00

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/*
* QEMU IDE disk and CD-ROM Emulator
*
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "vl.h"
/* debug IDE devices */
//#define DEBUG_IDE
//#define DEBUG_IDE_ATAPI
/* Bits of HD_STATUS */
#define ERR_STAT 0x01
#define INDEX_STAT 0x02
#define ECC_STAT 0x04 /* Corrected error */
#define DRQ_STAT 0x08
#define SEEK_STAT 0x10
#define SRV_STAT 0x10
#define WRERR_STAT 0x20
#define READY_STAT 0x40
#define BUSY_STAT 0x80
/* Bits for HD_ERROR */
#define MARK_ERR 0x01 /* Bad address mark */
#define TRK0_ERR 0x02 /* couldn't find track 0 */
#define ABRT_ERR 0x04 /* Command aborted */
#define MCR_ERR 0x08 /* media change request */
#define ID_ERR 0x10 /* ID field not found */
#define MC_ERR 0x20 /* media changed */
#define ECC_ERR 0x40 /* Uncorrectable ECC error */
#define BBD_ERR 0x80 /* pre-EIDE meaning: block marked bad */
#define ICRC_ERR 0x80 /* new meaning: CRC error during transfer */
/* Bits of HD_NSECTOR */
#define CD 0x01
#define IO 0x02
#define REL 0x04
#define TAG_MASK 0xf8
#define IDE_CMD_RESET 0x04
#define IDE_CMD_DISABLE_IRQ 0x02
/* ATA/ATAPI Commands pre T13 Spec */
#define WIN_NOP 0x00
/*
* 0x01->0x02 Reserved
*/
#define CFA_REQ_EXT_ERROR_CODE 0x03 /* CFA Request Extended Error Code */
/*
* 0x04->0x07 Reserved
*/
#define WIN_SRST 0x08 /* ATAPI soft reset command */
#define WIN_DEVICE_RESET 0x08
/*
* 0x09->0x0F Reserved
*/
#define WIN_RECAL 0x10
#define WIN_RESTORE WIN_RECAL
/*
* 0x10->0x1F Reserved
*/
#define WIN_READ 0x20 /* 28-Bit */
#define WIN_READ_ONCE 0x21 /* 28-Bit without retries */
#define WIN_READ_LONG 0x22 /* 28-Bit */
#define WIN_READ_LONG_ONCE 0x23 /* 28-Bit without retries */
#define WIN_READ_EXT 0x24 /* 48-Bit */
#define WIN_READDMA_EXT 0x25 /* 48-Bit */
#define WIN_READDMA_QUEUED_EXT 0x26 /* 48-Bit */
#define WIN_READ_NATIVE_MAX_EXT 0x27 /* 48-Bit */
/*
* 0x28
*/
#define WIN_MULTREAD_EXT 0x29 /* 48-Bit */
/*
* 0x2A->0x2F Reserved
*/
#define WIN_WRITE 0x30 /* 28-Bit */
#define WIN_WRITE_ONCE 0x31 /* 28-Bit without retries */
#define WIN_WRITE_LONG 0x32 /* 28-Bit */
#define WIN_WRITE_LONG_ONCE 0x33 /* 28-Bit without retries */
#define WIN_WRITE_EXT 0x34 /* 48-Bit */
#define WIN_WRITEDMA_EXT 0x35 /* 48-Bit */
#define WIN_WRITEDMA_QUEUED_EXT 0x36 /* 48-Bit */
#define WIN_SET_MAX_EXT 0x37 /* 48-Bit */
#define CFA_WRITE_SECT_WO_ERASE 0x38 /* CFA Write Sectors without erase */
#define WIN_MULTWRITE_EXT 0x39 /* 48-Bit */
/*
* 0x3A->0x3B Reserved
*/
#define WIN_WRITE_VERIFY 0x3C /* 28-Bit */
/*
* 0x3D->0x3F Reserved
*/
#define WIN_VERIFY 0x40 /* 28-Bit - Read Verify Sectors */
#define WIN_VERIFY_ONCE 0x41 /* 28-Bit - without retries */
#define WIN_VERIFY_EXT 0x42 /* 48-Bit */
/*
* 0x43->0x4F Reserved
*/
#define WIN_FORMAT 0x50
/*
* 0x51->0x5F Reserved
*/
#define WIN_INIT 0x60
/*
* 0x61->0x5F Reserved
*/
#define WIN_SEEK 0x70 /* 0x70-0x7F Reserved */
#define CFA_TRANSLATE_SECTOR 0x87 /* CFA Translate Sector */
#define WIN_DIAGNOSE 0x90
#define WIN_SPECIFY 0x91 /* set drive geometry translation */
#define WIN_DOWNLOAD_MICROCODE 0x92
#define WIN_STANDBYNOW2 0x94
#define WIN_STANDBY2 0x96
#define WIN_SETIDLE2 0x97
#define WIN_CHECKPOWERMODE2 0x98
#define WIN_SLEEPNOW2 0x99
/*
* 0x9A VENDOR
*/
#define WIN_PACKETCMD 0xA0 /* Send a packet command. */
#define WIN_PIDENTIFY 0xA1 /* identify ATAPI device */
#define WIN_QUEUED_SERVICE 0xA2
#define WIN_SMART 0xB0 /* self-monitoring and reporting */
#define CFA_ERASE_SECTORS 0xC0
#define WIN_MULTREAD 0xC4 /* read sectors using multiple mode*/
#define WIN_MULTWRITE 0xC5 /* write sectors using multiple mode */
#define WIN_SETMULT 0xC6 /* enable/disable multiple mode */
#define WIN_READDMA_QUEUED 0xC7 /* read sectors using Queued DMA transfers */
#define WIN_READDMA 0xC8 /* read sectors using DMA transfers */
#define WIN_READDMA_ONCE 0xC9 /* 28-Bit - without retries */
#define WIN_WRITEDMA 0xCA /* write sectors using DMA transfers */
#define WIN_WRITEDMA_ONCE 0xCB /* 28-Bit - without retries */
#define WIN_WRITEDMA_QUEUED 0xCC /* write sectors using Queued DMA transfers */
#define CFA_WRITE_MULTI_WO_ERASE 0xCD /* CFA Write multiple without erase */
#define WIN_GETMEDIASTATUS 0xDA
#define WIN_ACKMEDIACHANGE 0xDB /* ATA-1, ATA-2 vendor */
#define WIN_POSTBOOT 0xDC
#define WIN_PREBOOT 0xDD
#define WIN_DOORLOCK 0xDE /* lock door on removable drives */
#define WIN_DOORUNLOCK 0xDF /* unlock door on removable drives */
#define WIN_STANDBYNOW1 0xE0
#define WIN_IDLEIMMEDIATE 0xE1 /* force drive to become "ready" */
#define WIN_STANDBY 0xE2 /* Set device in Standby Mode */
#define WIN_SETIDLE1 0xE3
#define WIN_READ_BUFFER 0xE4 /* force read only 1 sector */
#define WIN_CHECKPOWERMODE1 0xE5
#define WIN_SLEEPNOW1 0xE6
#define WIN_FLUSH_CACHE 0xE7
#define WIN_WRITE_BUFFER 0xE8 /* force write only 1 sector */
#define WIN_WRITE_SAME 0xE9 /* read ata-2 to use */
/* SET_FEATURES 0x22 or 0xDD */
#define WIN_FLUSH_CACHE_EXT 0xEA /* 48-Bit */
#define WIN_IDENTIFY 0xEC /* ask drive to identify itself */
#define WIN_MEDIAEJECT 0xED
#define WIN_IDENTIFY_DMA 0xEE /* same as WIN_IDENTIFY, but DMA */
#define WIN_SETFEATURES 0xEF /* set special drive features */
#define EXABYTE_ENABLE_NEST 0xF0
#define WIN_SECURITY_SET_PASS 0xF1
#define WIN_SECURITY_UNLOCK 0xF2
#define WIN_SECURITY_ERASE_PREPARE 0xF3
#define WIN_SECURITY_ERASE_UNIT 0xF4
#define WIN_SECURITY_FREEZE_LOCK 0xF5
#define WIN_SECURITY_DISABLE 0xF6
#define WIN_READ_NATIVE_MAX 0xF8 /* return the native maximum address */
#define WIN_SET_MAX 0xF9
#define DISABLE_SEAGATE 0xFB
/* set to 1 set disable mult support */
#define MAX_MULT_SECTORS 8
/* ATAPI defines */
#define ATAPI_PACKET_SIZE 12
/* The generic packet command opcodes for CD/DVD Logical Units,
* From Table 57 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */
#define GPCMD_BLANK 0xa1
#define GPCMD_CLOSE_TRACK 0x5b
#define GPCMD_FLUSH_CACHE 0x35
#define GPCMD_FORMAT_UNIT 0x04
#define GPCMD_GET_CONFIGURATION 0x46
#define GPCMD_GET_EVENT_STATUS_NOTIFICATION 0x4a
#define GPCMD_GET_PERFORMANCE 0xac
#define GPCMD_INQUIRY 0x12
#define GPCMD_LOAD_UNLOAD 0xa6
#define GPCMD_MECHANISM_STATUS 0xbd
#define GPCMD_MODE_SELECT_10 0x55
#define GPCMD_MODE_SENSE_10 0x5a
#define GPCMD_PAUSE_RESUME 0x4b
#define GPCMD_PLAY_AUDIO_10 0x45
#define GPCMD_PLAY_AUDIO_MSF 0x47
#define GPCMD_PLAY_AUDIO_TI 0x48
#define GPCMD_PLAY_CD 0xbc
#define GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e
#define GPCMD_READ_10 0x28
#define GPCMD_READ_12 0xa8
#define GPCMD_READ_CDVD_CAPACITY 0x25
#define GPCMD_READ_CD 0xbe
#define GPCMD_READ_CD_MSF 0xb9
#define GPCMD_READ_DISC_INFO 0x51
#define GPCMD_READ_DVD_STRUCTURE 0xad
#define GPCMD_READ_FORMAT_CAPACITIES 0x23
#define GPCMD_READ_HEADER 0x44
#define GPCMD_READ_TRACK_RZONE_INFO 0x52
#define GPCMD_READ_SUBCHANNEL 0x42
#define GPCMD_READ_TOC_PMA_ATIP 0x43
#define GPCMD_REPAIR_RZONE_TRACK 0x58
#define GPCMD_REPORT_KEY 0xa4
#define GPCMD_REQUEST_SENSE 0x03
#define GPCMD_RESERVE_RZONE_TRACK 0x53
#define GPCMD_SCAN 0xba
#define GPCMD_SEEK 0x2b
#define GPCMD_SEND_DVD_STRUCTURE 0xad
#define GPCMD_SEND_EVENT 0xa2
#define GPCMD_SEND_KEY 0xa3
#define GPCMD_SEND_OPC 0x54
#define GPCMD_SET_READ_AHEAD 0xa7
#define GPCMD_SET_STREAMING 0xb6
#define GPCMD_START_STOP_UNIT 0x1b
#define GPCMD_STOP_PLAY_SCAN 0x4e
#define GPCMD_TEST_UNIT_READY 0x00
#define GPCMD_VERIFY_10 0x2f
#define GPCMD_WRITE_10 0x2a
#define GPCMD_WRITE_AND_VERIFY_10 0x2e
/* This is listed as optional in ATAPI 2.6, but is (curiously)
* missing from Mt. Fuji, Table 57. It _is_ mentioned in Mt. Fuji
* Table 377 as an MMC command for SCSi devices though... Most ATAPI
* drives support it. */
#define GPCMD_SET_SPEED 0xbb
/* This seems to be a SCSI specific CD-ROM opcode
* to play data at track/index */
#define GPCMD_PLAYAUDIO_TI 0x48
/*
* From MS Media Status Notification Support Specification. For
* older drives only.
*/
#define GPCMD_GET_MEDIA_STATUS 0xda
/* Mode page codes for mode sense/set */
#define GPMODE_R_W_ERROR_PAGE 0x01
#define GPMODE_WRITE_PARMS_PAGE 0x05
#define GPMODE_AUDIO_CTL_PAGE 0x0e
#define GPMODE_POWER_PAGE 0x1a
#define GPMODE_FAULT_FAIL_PAGE 0x1c
#define GPMODE_TO_PROTECT_PAGE 0x1d
#define GPMODE_CAPABILITIES_PAGE 0x2a
#define GPMODE_ALL_PAGES 0x3f
/* Not in Mt. Fuji, but in ATAPI 2.6 -- depricated now in favor
* of MODE_SENSE_POWER_PAGE */
#define GPMODE_CDROM_PAGE 0x0d
#define ATAPI_INT_REASON_CD 0x01 /* 0 = data transfer */
#define ATAPI_INT_REASON_IO 0x02 /* 1 = transfer to the host */
#define ATAPI_INT_REASON_REL 0x04
#define ATAPI_INT_REASON_TAG 0xf8
/* same constants as bochs */
#define ASC_ILLEGAL_OPCODE 0x20
#define ASC_LOGICAL_BLOCK_OOR 0x21
#define ASC_INV_FIELD_IN_CMD_PACKET 0x24
#define ASC_MEDIUM_NOT_PRESENT 0x3a
#define ASC_SAVING_PARAMETERS_NOT_SUPPORTED 0x39
#define SENSE_NONE 0
#define SENSE_NOT_READY 2
#define SENSE_ILLEGAL_REQUEST 5
#define SENSE_UNIT_ATTENTION 6
struct IDEState;
typedef void EndTransferFunc(struct IDEState *);
/* NOTE: IDEState represents in fact one drive */
typedef struct IDEState {
/* ide config */
int is_cdrom;
int cylinders, heads, sectors;
int64_t nb_sectors;
int mult_sectors;
int irq;
/* ide regs */
uint8_t feature;
uint8_t error;
uint16_t nsector; /* 0 is 256 to ease computations */
uint8_t sector;
uint8_t lcyl;
uint8_t hcyl;
uint8_t select;
uint8_t status;
/* 0x3f6 command, only meaningful for drive 0 */
uint8_t cmd;
/* depends on bit 4 in select, only meaningful for drive 0 */
struct IDEState *cur_drive;
BlockDriverState *bs;
/* ATAPI specific */
uint8_t sense_key;
uint8_t asc;
int packet_transfer_size;
int elementary_transfer_size;
int io_buffer_index;
int lba;
/* transfer handling */
int req_nb_sectors; /* number of sectors per interrupt */
EndTransferFunc *end_transfer_func;
uint8_t *data_ptr;
uint8_t *data_end;
uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
} IDEState;
static void padstr(char *str, const char *src, int len)
{
int i, v;
for(i = 0; i < len; i++) {
if (*src)
v = *src++;
else
v = ' ';
*(char *)((long)str ^ 1) = v;
str++;
}
}
static void padstr8(uint8_t *buf, int buf_size, const char *src)
{
int i;
for(i = 0; i < buf_size; i++) {
if (*src)
buf[i] = *src++;
else
buf[i] = ' ';
}
}
static void put_le16(uint16_t *p, unsigned int v)
{
#ifdef WORDS_BIGENDIAN
*p = bswap16(v);
#else
*p = v;
#endif
}
static void ide_identify(IDEState *s)
{
uint16_t *p;
unsigned int oldsize;
memset(s->io_buffer, 0, 512);
p = (uint16_t *)s->io_buffer;
put_le16(p + 0, 0x0040);
put_le16(p + 1, s->cylinders);
put_le16(p + 3, s->heads);
put_le16(p + 4, 512 * s->sectors); /* XXX: retired, remove ? */
put_le16(p + 5, 512); /* XXX: retired, remove ? */
put_le16(p + 6, s->sectors);
padstr((uint8_t *)(p + 10), "QM00001", 20); /* serial number */
put_le16(p + 20, 3); /* XXX: retired, remove ? */
put_le16(p + 21, 512); /* cache size in sectors */
put_le16(p + 22, 4); /* ecc bytes */
padstr((uint8_t *)(p + 23), QEMU_VERSION, 8); /* firmware version */
padstr((uint8_t *)(p + 27), "QEMU HARDDISK", 40); /* model */
#if MAX_MULT_SECTORS > 1
put_le16(p + 47, 0x8000 | MAX_MULT_SECTORS);
#endif
put_le16(p + 48, 1); /* dword I/O */
put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
put_le16(p + 51, 0x200); /* PIO transfer cycle */
put_le16(p + 52, 0x200); /* DMA transfer cycle */
put_le16(p + 53, 1); /* words 54-58 are valid */
put_le16(p + 54, s->cylinders);
put_le16(p + 55, s->heads);
put_le16(p + 56, s->sectors);
oldsize = s->cylinders * s->heads * s->sectors;
put_le16(p + 57, oldsize);
put_le16(p + 58, oldsize >> 16);
if (s->mult_sectors)
put_le16(p + 59, 0x100 | s->mult_sectors);
put_le16(p + 60, s->nb_sectors);
put_le16(p + 61, s->nb_sectors >> 16);
put_le16(p + 80, (1 << 1) | (1 << 2));
put_le16(p + 82, (1 << 14));
put_le16(p + 83, (1 << 14));
put_le16(p + 84, (1 << 14));
put_le16(p + 85, (1 << 14));
put_le16(p + 86, 0);
put_le16(p + 87, (1 << 14));
}
static void ide_atapi_identify(IDEState *s)
{
uint16_t *p;
memset(s->io_buffer, 0, 512);
p = (uint16_t *)s->io_buffer;
/* Removable CDROM, 50us response, 12 byte packets */
put_le16(p + 0, (2 << 14) | (5 << 8) | (1 << 7) | (2 << 5) | (0 << 0));
put_le16(p + 1, s->cylinders);
put_le16(p + 3, s->heads);
put_le16(p + 4, 512 * s->sectors); /* sectors */
put_le16(p + 5, 512); /* sector size */
put_le16(p + 6, s->sectors);
padstr((uint8_t *)(p + 10), "QM00001", 20); /* serial number */
put_le16(p + 20, 3); /* buffer type */
put_le16(p + 21, 512); /* cache size in sectors */
put_le16(p + 22, 4); /* ecc bytes */
padstr((uint8_t *)(p + 23), QEMU_VERSION, 8); /* firmware version */
padstr((uint8_t *)(p + 27), "QEMU CD-ROM", 40); /* model */
put_le16(p + 48, 1); /* dword I/O (XXX: should not be set on CDROM) */
put_le16(p + 49, 1 << 9); /* LBA supported, no DMA */
put_le16(p + 53, 3); /* words 64-70, 54-58 valid */
put_le16(p + 63, 0x103); /* DMA modes XXX: may be incorrect */
put_le16(p + 64, 1); /* PIO modes */
put_le16(p + 65, 0xb4); /* minimum DMA multiword tx cycle time */
put_le16(p + 66, 0xb4); /* recommended DMA multiword tx cycle time */
put_le16(p + 67, 0x12c); /* minimum PIO cycle time without flow control */
put_le16(p + 68, 0xb4); /* minimum PIO cycle time with IORDY flow control */
put_le16(p + 71, 30); /* in ns */
put_le16(p + 72, 30); /* in ns */
put_le16(p + 80, 0x1e); /* support up to ATA/ATAPI-4 */
}
static void ide_set_signature(IDEState *s)
{
s->select &= 0xf0; /* clear head */
/* put signature */
s->nsector = 1;
s->sector = 1;
if (s->is_cdrom) {
s->lcyl = 0x14;
s->hcyl = 0xeb;
} else if (s->bs) {
s->lcyl = 0;
s->hcyl = 0;
} else {
s->lcyl = 0xff;
s->hcyl = 0xff;
}
}
static inline void ide_abort_command(IDEState *s)
{
s->status = READY_STAT | ERR_STAT;
s->error = ABRT_ERR;
}
static inline void ide_set_irq(IDEState *s)
{
if (!(s->cmd & IDE_CMD_DISABLE_IRQ)) {
pic_set_irq(s->irq, 1);
}
}
/* prepare data transfer and tell what to do after */
static void ide_transfer_start(IDEState *s, uint8_t *buf, int size,
EndTransferFunc *end_transfer_func)
{
s->end_transfer_func = end_transfer_func;
s->data_ptr = buf;
s->data_end = buf + size;
s->status |= DRQ_STAT;
}
static void ide_transfer_stop(IDEState *s)
{
s->end_transfer_func = ide_transfer_stop;
s->data_ptr = s->io_buffer;
s->data_end = s->io_buffer;
s->status &= ~DRQ_STAT;
}
static int64_t ide_get_sector(IDEState *s)
{
int64_t sector_num;
if (s->select & 0x40) {
/* lba */
sector_num = ((s->select & 0x0f) << 24) | (s->hcyl << 16) |
(s->lcyl << 8) | s->sector;
} else {
sector_num = ((s->hcyl << 8) | s->lcyl) * s->heads * s->sectors +
(s->select & 0x0f) * s->sectors +
(s->sector - 1);
}
return sector_num;
}
static void ide_set_sector(IDEState *s, int64_t sector_num)
{
unsigned int cyl, r;
if (s->select & 0x40) {
s->select = (s->select & 0xf0) | (sector_num >> 24);
s->hcyl = (sector_num >> 16);
s->lcyl = (sector_num >> 8);
s->sector = (sector_num);
} else {
cyl = sector_num / (s->heads * s->sectors);
r = sector_num % (s->heads * s->sectors);
s->hcyl = cyl >> 8;
s->lcyl = cyl;
s->select = (s->select & 0xf0) | ((r / s->sectors) & 0x0f);
s->sector = (r % s->sectors) + 1;
}
}
static void ide_sector_read(IDEState *s)
{
int64_t sector_num;
int ret, n;
s->status = READY_STAT | SEEK_STAT;
s->error = 0; /* not needed by IDE spec, but needed by Windows */
sector_num = ide_get_sector(s);
n = s->nsector;
if (n == 0) {
/* no more sector to read from disk */
ide_transfer_stop(s);
} else {
#if defined(DEBUG_IDE)
printf("read sector=%Ld\n", sector_num);
#endif
if (n > s->req_nb_sectors)
n = s->req_nb_sectors;
ret = bdrv_read(s->bs, sector_num, s->io_buffer, n);
ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_read);
ide_set_irq(s);
ide_set_sector(s, sector_num + n);
s->nsector -= n;
}
}
static void ide_sector_write(IDEState *s)
{
int64_t sector_num;
int ret, n, n1;
s->status = READY_STAT | SEEK_STAT;
sector_num = ide_get_sector(s);
#if defined(DEBUG_IDE)
printf("write sector=%Ld\n", sector_num);
#endif
n = s->nsector;
if (n > s->req_nb_sectors)
n = s->req_nb_sectors;
ret = bdrv_write(s->bs, sector_num, s->io_buffer, n);
s->nsector -= n;
if (s->nsector == 0) {
/* no more sector to write */
ide_transfer_stop(s);
} else {
n1 = s->nsector;
if (n1 > s->req_nb_sectors)
n1 = s->req_nb_sectors;
ide_transfer_start(s, s->io_buffer, 512 * n1, ide_sector_write);
}
ide_set_sector(s, sector_num + n);
ide_set_irq(s);
}
static void ide_atapi_cmd_ok(IDEState *s)
{
s->error = 0;
s->status = READY_STAT;
s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
ide_set_irq(s);
}
static void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc)
{
#ifdef DEBUG_IDE_ATAPI
printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc);
#endif
s->error = sense_key << 4;
s->status = READY_STAT | ERR_STAT;
s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
s->sense_key = sense_key;
s->asc = asc;
ide_set_irq(s);
}
static inline void cpu_to_ube16(uint8_t *buf, int val)
{
buf[0] = val >> 8;
buf[1] = val;
}
static inline void cpu_to_ube32(uint8_t *buf, unsigned int val)
{
buf[0] = val >> 24;
buf[1] = val >> 16;
buf[2] = val >> 8;
buf[3] = val;
}
static inline int ube16_to_cpu(const uint8_t *buf)
{
return (buf[0] << 8) | buf[1];
}
static inline int ube32_to_cpu(const uint8_t *buf)
{
return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}
/* The whole ATAPI transfer logic is handled in this function */
static void ide_atapi_cmd_reply_end(IDEState *s)
{
int byte_count_limit, size;
#ifdef DEBUG_IDE_ATAPI
printf("reply: tx_size=%d elem_tx_size=%d index=%d\n",
s->packet_transfer_size,
s->elementary_transfer_size,
s->io_buffer_index);
#endif
if (s->packet_transfer_size <= 0) {
/* end of transfer */
ide_transfer_stop(s);
s->status = READY_STAT;
s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
ide_set_irq(s);
#ifdef DEBUG_IDE_ATAPI
printf("status=0x%x\n", s->status);
#endif
} else {
/* see if a new sector must be read */
if (s->lba != -1 && s->io_buffer_index >= 2048) {
bdrv_read(s->bs, (int64_t)s->lba << 2, s->io_buffer, 4);
s->lba++;
s->io_buffer_index = 0;
}
if (s->elementary_transfer_size > 0) {
/* there are some data left to transmit in this elementary
transfer */
size = 2048 - s->io_buffer_index;
if (size > s->elementary_transfer_size)
size = s->elementary_transfer_size;
ide_transfer_start(s, s->io_buffer + s->io_buffer_index,
size, ide_atapi_cmd_reply_end);
s->packet_transfer_size -= size;
s->elementary_transfer_size -= size;
s->io_buffer_index += size;
} else {
/* a new transfer is needed */
s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO;
byte_count_limit = s->lcyl | (s->hcyl << 8);
#ifdef DEBUG_IDE_ATAPI
printf("byte_count_limit=%d\n", byte_count_limit);
#endif
if (byte_count_limit == 0xffff)
byte_count_limit--;
size = s->packet_transfer_size;
if (size > byte_count_limit) {
/* byte count limit must be even if this case */
if (byte_count_limit & 1)
byte_count_limit--;
size = byte_count_limit;
}
s->lcyl = size;
s->hcyl = size >> 8;
s->elementary_transfer_size = size;
/* we cannot transmit more than one sector at a time */
if (s->lba != -1) {
if (size > (2048 - s->io_buffer_index))
size = (2048 - s->io_buffer_index);
}
ide_transfer_start(s, s->io_buffer + s->io_buffer_index,
size, ide_atapi_cmd_reply_end);
s->packet_transfer_size -= size;
s->elementary_transfer_size -= size;
s->io_buffer_index += size;
ide_set_irq(s);
#ifdef DEBUG_IDE_ATAPI
printf("status=0x%x\n", s->status);
#endif
}
}
}
/* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */
static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size)
{
if (size > max_size)
size = max_size;
s->lba = -1; /* no sector read */
s->packet_transfer_size = size;
s->elementary_transfer_size = 0;
s->io_buffer_index = 0;
s->status = READY_STAT;
ide_atapi_cmd_reply_end(s);
}
/* start a CD-CDROM read command */
static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors)
{
#ifdef DEBUG_IDE_ATAPI
printf("read: LBA=%d nb_sectors=%d\n", lba, nb_sectors);
#endif
s->lba = lba;
s->packet_transfer_size = nb_sectors * 2048;
s->elementary_transfer_size = 0;
s->io_buffer_index = 2048;
s->status = READY_STAT;
ide_atapi_cmd_reply_end(s);
}
/* same toc as bochs. Return -1 if error or the toc length */
static int cdrom_read_toc(IDEState *s, uint8_t *buf, int msf, int start_track)
{
uint8_t *q;
int nb_sectors, len;
if (start_track > 1 && start_track != 0xaa)
return -1;
q = buf + 2;
*q++ = 1;
*q++ = 1;
if (start_track <= 1) {
*q++ = 0; /* reserved */
*q++ = 0x14; /* ADR, control */
*q++ = 1; /* track number */
*q++ = 0; /* reserved */
if (msf) {
*q++ = 0; /* reserved */
*q++ = 0; /* minute */
*q++ = 2; /* second */
*q++ = 0; /* frame */
} else {
/* sector 0 */
cpu_to_ube32(q, 0);
q += 4;
}
}
/* lead out track */
*q++ = 0; /* reserved */
*q++ = 0x16; /* ADR, control */
*q++ = 0xaa; /* track number */
*q++ = 0; /* reserved */
nb_sectors = s->nb_sectors >> 2;
if (msf) {
*q++ = 0; /* reserved */
*q++ = ((nb_sectors + 150) / 75) / 60;
*q++ = ((nb_sectors + 150) / 75) % 60;
*q++ = (nb_sectors + 150) % 75;
} else {
cpu_to_ube32(q, nb_sectors);
q += 4;
}
len = q - buf;
cpu_to_ube16(buf, len - 2);
return len;
}
static void ide_atapi_cmd(IDEState *s)
{
const uint8_t *packet;
uint8_t *buf;
int max_len;
packet = s->io_buffer;
buf = s->io_buffer;
#ifdef DEBUG_IDE_ATAPI
{
int i;
printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8));
for(i = 0; i < ATAPI_PACKET_SIZE; i++) {
printf(" %02x", packet[i]);
}
printf("\n");
}
#endif
switch(s->io_buffer[0]) {
case GPCMD_TEST_UNIT_READY:
if (bdrv_is_inserted(s->bs)) {
ide_atapi_cmd_ok(s);
} else {
ide_atapi_cmd_error(s, SENSE_NOT_READY,
ASC_MEDIUM_NOT_PRESENT);
}
break;
case GPCMD_MODE_SENSE_10:
{
int action, code;
max_len = ube16_to_cpu(packet + 7);
action = packet[2] >> 6;
code = packet[2] & 0x3f;
switch(action) {
case 0: /* current values */
switch(code) {
case 0x01: /* error recovery */
cpu_to_ube16(&buf[0], 16 + 6);
buf[2] = 0x70;
buf[3] = 0;
buf[4] = 0;
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
buf[8] = 0x01;
buf[9] = 0x06;
buf[10] = 0x00;
buf[11] = 0x05;
buf[12] = 0x00;
buf[13] = 0x00;
buf[14] = 0x00;
buf[15] = 0x00;
ide_atapi_cmd_reply(s, 16, max_len);
break;
case 0x2a:
cpu_to_ube16(&buf[0], 28 + 6);
buf[2] = 0x70;
buf[3] = 0;
buf[4] = 0;
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
buf[8] = 0x2a;
buf[9] = 0x12;
buf[10] = 0x00;
buf[11] = 0x00;
buf[12] = 0x70;
buf[13] = 3 << 5;
buf[14] = (1 << 0) | (1 << 3) | (1 << 5);
if (bdrv_is_locked(s->bs))
buf[6] |= 1 << 1;
buf[15] = 0x00;
cpu_to_ube16(&buf[16], 706);
buf[18] = 0;
buf[19] = 2;
cpu_to_ube16(&buf[20], 512);
cpu_to_ube16(&buf[22], 706);
buf[24] = 0;
buf[25] = 0;
buf[26] = 0;
buf[27] = 0;
ide_atapi_cmd_reply(s, 28, max_len);
break;
default:
goto error_cmd;
}
break;
case 1: /* changeable values */
goto error_cmd;
case 2: /* default values */
goto error_cmd;
default:
case 3: /* saved values */
ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST,
ASC_SAVING_PARAMETERS_NOT_SUPPORTED);
break;
}
}
break;
case GPCMD_REQUEST_SENSE:
max_len = packet[4];
memset(buf, 0, 18);
buf[0] = 0x70 | (1 << 7);
buf[2] = s->sense_key;
buf[7] = 10;
buf[12] = s->asc;
ide_atapi_cmd_reply(s, 18, max_len);
break;
case GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
if (bdrv_is_inserted(s->bs)) {
bdrv_set_locked(s->bs, packet[4] & 1);
ide_atapi_cmd_ok(s);
} else {
ide_atapi_cmd_error(s, SENSE_NOT_READY,
ASC_MEDIUM_NOT_PRESENT);
}
break;
case GPCMD_READ_10:
case GPCMD_READ_12:
{
int nb_sectors, lba;
if (!bdrv_is_inserted(s->bs)) {
ide_atapi_cmd_error(s, SENSE_NOT_READY,
ASC_MEDIUM_NOT_PRESENT);
break;
}
if (packet[0] == GPCMD_READ_10)
nb_sectors = ube16_to_cpu(packet + 7);
else
nb_sectors = ube32_to_cpu(packet + 6);
lba = ube32_to_cpu(packet + 2);
if (nb_sectors == 0) {
ide_atapi_cmd_ok(s);
break;
}
if (((int64_t)(lba + nb_sectors) << 2) > s->nb_sectors) {
ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST,
ASC_LOGICAL_BLOCK_OOR);
break;
}
ide_atapi_cmd_read(s, lba, nb_sectors);
}
break;
case GPCMD_SEEK:
{
int lba;
if (!bdrv_is_inserted(s->bs)) {
ide_atapi_cmd_error(s, SENSE_NOT_READY,
ASC_MEDIUM_NOT_PRESENT);
break;
}
lba = ube32_to_cpu(packet + 2);
if (((int64_t)lba << 2) > s->nb_sectors) {
ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST,
ASC_LOGICAL_BLOCK_OOR);
break;
}
ide_atapi_cmd_ok(s);
}
break;
case GPCMD_START_STOP_UNIT:
{
int start, eject;
start = packet[4] & 1;
eject = (packet[4] >> 1) & 1;
if (eject && !start) {
/* eject the disk */
bdrv_close(s->bs);
}
ide_atapi_cmd_ok(s);
}
break;
case GPCMD_MECHANISM_STATUS:
{
max_len = ube16_to_cpu(packet + 8);
cpu_to_ube16(buf, 0);
/* no current LBA */
buf[2] = 0;
buf[3] = 0;
buf[4] = 0;
buf[5] = 1;
cpu_to_ube16(buf + 6, 0);
ide_atapi_cmd_reply(s, 8, max_len);
}
break;
case GPCMD_READ_TOC_PMA_ATIP:
{
int format, msf, start_track, len;
if (!bdrv_is_inserted(s->bs)) {
ide_atapi_cmd_error(s, SENSE_NOT_READY,
ASC_MEDIUM_NOT_PRESENT);
break;
}
max_len = ube16_to_cpu(packet + 7);
format = packet[9] >> 6;
msf = (packet[1] >> 1) & 1;
start_track = packet[6];
switch(format) {
case 0:
len = cdrom_read_toc(s, buf, msf, start_track);
if (len < 0)
goto error_cmd;
ide_atapi_cmd_reply(s, len, max_len);
break;
case 1:
/* multi session : only a single session defined */
memset(buf, 0, 12);
buf[1] = 0x0a;
buf[2] = 0x01;
buf[3] = 0x01;
ide_atapi_cmd_reply(s, 12, max_len);
break;
default:
error_cmd:
ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST,
ASC_INV_FIELD_IN_CMD_PACKET);
break;
}
}
break;
case GPCMD_READ_CDVD_CAPACITY:
if (!bdrv_is_inserted(s->bs)) {
ide_atapi_cmd_error(s, SENSE_NOT_READY,
ASC_MEDIUM_NOT_PRESENT);
break;
}
/* NOTE: it is really the number of sectors minus 1 */
cpu_to_ube32(buf, (s->nb_sectors >> 2) - 1);
cpu_to_ube32(buf + 4, 2048);
ide_atapi_cmd_reply(s, 8, 8);
break;
case GPCMD_INQUIRY:
max_len = packet[4];
buf[0] = 0x05; /* CD-ROM */
buf[1] = 0x80; /* removable */
buf[2] = 0x00; /* ISO */
buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */
buf[4] = 31; /* additionnal length */
buf[5] = 0; /* reserved */
buf[6] = 0; /* reserved */
buf[7] = 0; /* reserved */
padstr8(buf + 8, 8, "QEMU");
padstr8(buf + 16, 16, "QEMU CD-ROM");
padstr8(buf + 32, 4, QEMU_VERSION);
ide_atapi_cmd_reply(s, 36, max_len);
break;
default:
ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST,
ASC_ILLEGAL_OPCODE);
break;
}
}
/* called when the inserted state of the media has changed */
static void cdrom_change_cb(void *opaque)
{
IDEState *s = opaque;
int64_t nb_sectors;
/* XXX: send interrupt too */
bdrv_get_geometry(s->bs, &nb_sectors);
s->nb_sectors = nb_sectors;
}
static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
IDEState *ide_if = opaque;
IDEState *s;
int unit, n;
#ifdef DEBUG_IDE
printf("IDE: write addr=0x%x val=0x%02x\n", addr, val);
#endif
addr &= 7;
switch(addr) {
case 0:
break;
case 1:
/* NOTE: data is written to the two drives */
ide_if[0].feature = val;
ide_if[1].feature = val;
break;
case 2:
if (val == 0)
val = 256;
ide_if[0].nsector = val;
ide_if[1].nsector = val;
break;
case 3:
ide_if[0].sector = val;
ide_if[1].sector = val;
break;
case 4:
ide_if[0].lcyl = val;
ide_if[1].lcyl = val;
break;
case 5:
ide_if[0].hcyl = val;
ide_if[1].hcyl = val;
break;
case 6:
ide_if[0].select = (val & ~0x10) | 0xa0;
ide_if[1].select = (val | 0x10) | 0xa0;
/* select drive */
unit = (val >> 4) & 1;
s = ide_if + unit;
ide_if->cur_drive = s;
break;
default:
case 7:
/* command */
#if defined(DEBUG_IDE)
printf("ide: CMD=%02x\n", val);
#endif
s = ide_if->cur_drive;
switch(val) {
case WIN_IDENTIFY:
if (s->bs && !s->is_cdrom) {
ide_identify(s);
s->status = READY_STAT;
ide_transfer_start(s, s->io_buffer, 512, ide_transfer_stop);
} else {
if (s->is_cdrom) {
ide_set_signature(s);
}
ide_abort_command(s);
}
ide_set_irq(s);
break;
case WIN_SPECIFY:
case WIN_RECAL:
s->error = 0;
s->status = READY_STAT;
ide_set_irq(s);
break;
case WIN_SETMULT:
if (s->nsector > MAX_MULT_SECTORS ||
s->nsector == 0 ||
(s->nsector & (s->nsector - 1)) != 0) {
ide_abort_command(s);
} else {
s->mult_sectors = s->nsector;
s->status = READY_STAT;
}
ide_set_irq(s);
break;
case WIN_VERIFY:
case WIN_VERIFY_ONCE:
/* do sector number check ? */
s->status = READY_STAT;
ide_set_irq(s);
break;
case WIN_READ:
case WIN_READ_ONCE:
if (!s->bs)
goto abort_cmd;
s->req_nb_sectors = 1;
ide_sector_read(s);
break;
case WIN_WRITE:
case WIN_WRITE_ONCE:
s->error = 0;
s->status = SEEK_STAT;
s->req_nb_sectors = 1;
ide_transfer_start(s, s->io_buffer, 512, ide_sector_write);
break;
case WIN_MULTREAD:
if (!s->mult_sectors)
goto abort_cmd;
s->req_nb_sectors = s->mult_sectors;
ide_sector_read(s);
break;
case WIN_MULTWRITE:
if (!s->mult_sectors)
goto abort_cmd;
s->error = 0;
s->status = SEEK_STAT;
s->req_nb_sectors = s->mult_sectors;
n = s->nsector;
if (n > s->req_nb_sectors)
n = s->req_nb_sectors;
ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_write);
break;
case WIN_READ_NATIVE_MAX:
ide_set_sector(s, s->nb_sectors - 1);
s->status = READY_STAT;
ide_set_irq(s);
break;
case WIN_CHECKPOWERMODE1:
s->nsector = 0xff; /* device active or idle */
s->status = READY_STAT;
ide_set_irq(s);
break;
/* ATAPI commands */
case WIN_PIDENTIFY:
if (s->is_cdrom) {
ide_atapi_identify(s);
s->status = READY_STAT;
ide_transfer_start(s, s->io_buffer, 512, ide_transfer_stop);
} else {
ide_abort_command(s);
}
ide_set_irq(s);
break;
case WIN_SRST:
if (!s->is_cdrom)
goto abort_cmd;
ide_set_signature(s);
s->status = 0x00; /* NOTE: READY is _not_ set */
s->error = 0x01;
break;
case WIN_PACKETCMD:
if (!s->is_cdrom)
goto abort_cmd;
/* DMA or overlapping commands not supported */
if ((s->feature & 0x03) != 0)
goto abort_cmd;
s->nsector = 1;
ide_transfer_start(s, s->io_buffer, ATAPI_PACKET_SIZE,
ide_atapi_cmd);
break;
default:
abort_cmd:
ide_abort_command(s);
ide_set_irq(s);
break;
}
}
}
static uint32_t ide_ioport_read(void *opaque, uint32_t addr1)
{
IDEState *ide_if = opaque;
IDEState *s = ide_if->cur_drive;
uint32_t addr;
int ret;
addr = addr1 & 7;
switch(addr) {
case 0:
ret = 0xff;
break;
case 1:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->error;
break;
case 2:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->nsector & 0xff;
break;
case 3:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->sector;
break;
case 4:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->lcyl;
break;
case 5:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->hcyl;
break;
case 6:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->select;
break;
default:
case 7:
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->status;
pic_set_irq(s->irq, 0);
break;
}
#ifdef DEBUG_IDE
printf("ide: read addr=0x%x val=%02x\n", addr1, ret);
#endif
return ret;
}
static uint32_t ide_status_read(void *opaque, uint32_t addr)
{
IDEState *ide_if = opaque;
IDEState *s = ide_if->cur_drive;
int ret;
if (!ide_if[0].bs && !ide_if[1].bs)
ret = 0;
else
ret = s->status;
#ifdef DEBUG_IDE
printf("ide: read status addr=0x%x val=%02x\n", addr, ret);
#endif
return ret;
}
static void ide_cmd_write(void *opaque, uint32_t addr, uint32_t val)
{
IDEState *ide_if = opaque;
IDEState *s;
int i;
#ifdef DEBUG_IDE
printf("ide: write control addr=0x%x val=%02x\n", addr, val);
#endif
/* common for both drives */
if (!(ide_if[0].cmd & IDE_CMD_RESET) &&
(val & IDE_CMD_RESET)) {
/* reset low to high */
for(i = 0;i < 2; i++) {
s = &ide_if[i];
s->status = BUSY_STAT | SEEK_STAT;
s->error = 0x01;
}
} else if ((ide_if[0].cmd & IDE_CMD_RESET) &&
!(val & IDE_CMD_RESET)) {
/* high to low */
for(i = 0;i < 2; i++) {
s = &ide_if[i];
if (s->is_cdrom)
s->status = 0x00; /* NOTE: READY is _not_ set */
else
s->status = READY_STAT | SEEK_STAT;
ide_set_signature(s);
}
}
ide_if[0].cmd = val;
ide_if[1].cmd = val;
}
static void ide_data_writew(void *opaque, uint32_t addr, uint32_t val)
{
IDEState *s = ((IDEState *)opaque)->cur_drive;
uint8_t *p;
p = s->data_ptr;
*(uint16_t *)p = tswap16(val);
p += 2;
s->data_ptr = p;
if (p >= s->data_end)
s->end_transfer_func(s);
}
static uint32_t ide_data_readw(void *opaque, uint32_t addr)
{
IDEState *s = ((IDEState *)opaque)->cur_drive;
uint8_t *p;
int ret;
p = s->data_ptr;
ret = tswap16(*(uint16_t *)p);
p += 2;
s->data_ptr = p;
if (p >= s->data_end)
s->end_transfer_func(s);
return ret;
}
static void ide_data_writel(void *opaque, uint32_t addr, uint32_t val)
{
IDEState *s = ((IDEState *)opaque)->cur_drive;
uint8_t *p;
p = s->data_ptr;
*(uint32_t *)p = tswap32(val);
p += 4;
s->data_ptr = p;
if (p >= s->data_end)
s->end_transfer_func(s);
}
static uint32_t ide_data_readl(void *opaque, uint32_t addr)
{
IDEState *s = ((IDEState *)opaque)->cur_drive;
uint8_t *p;
int ret;
p = s->data_ptr;
ret = tswap32(*(uint32_t *)p);
p += 4;
s->data_ptr = p;
if (p >= s->data_end)
s->end_transfer_func(s);
return ret;
}
static void ide_reset(IDEState *s)
{
s->mult_sectors = MAX_MULT_SECTORS;
s->cur_drive = s;
s->select = 0xa0;
s->status = READY_STAT;
ide_set_signature(s);
}
struct partition {
uint8_t boot_ind; /* 0x80 - active */
uint8_t head; /* starting head */
uint8_t sector; /* starting sector */
uint8_t cyl; /* starting cylinder */
uint8_t sys_ind; /* What partition type */
uint8_t end_head; /* end head */
uint8_t end_sector; /* end sector */
uint8_t end_cyl; /* end cylinder */
uint32_t start_sect; /* starting sector counting from 0 */
uint32_t nr_sects; /* nr of sectors in partition */
} __attribute__((packed));
/* try to guess the IDE geometry from the MSDOS partition table */
static void ide_guess_geometry(IDEState *s)
{
uint8_t buf[512];
int ret, i;
struct partition *p;
uint32_t nr_sects;
if (s->cylinders != 0)
return;
ret = bdrv_read(s->bs, 0, buf, 1);
if (ret < 0)
return;
/* test msdos magic */
if (buf[510] != 0x55 || buf[511] != 0xaa)
return;
for(i = 0; i < 4; i++) {
p = ((struct partition *)(buf + 0x1be)) + i;
nr_sects = tswap32(p->nr_sects);
if (nr_sects && p->end_head) {
/* We make the assumption that the partition terminates on
a cylinder boundary */
s->heads = p->end_head + 1;
s->sectors = p->end_sector & 63;
s->cylinders = s->nb_sectors / (s->heads * s->sectors);
#if 0
printf("guessed partition: CHS=%d %d %d\n",
s->cylinders, s->heads, s->sectors);
#endif
}
}
}
void ide_init(int iobase, int iobase2, int irq,
BlockDriverState *hd0, BlockDriverState *hd1)
{
IDEState *s, *ide_state;
int i, cylinders, heads, secs;
int64_t nb_sectors;
ide_state = qemu_mallocz(sizeof(IDEState) * 2);
if (!ide_state)
return;
for(i = 0; i < 2; i++) {
s = ide_state + i;
if (i == 0)
s->bs = hd0;
else
s->bs = hd1;
if (s->bs) {
bdrv_get_geometry(s->bs, &nb_sectors);
s->nb_sectors = nb_sectors;
/* if a geometry hint is available, use it */
bdrv_get_geometry_hint(s->bs, &cylinders, &heads, &secs);
if (cylinders != 0) {
s->cylinders = cylinders;
s->heads = heads;
s->sectors = secs;
} else {
ide_guess_geometry(s);
if (s->cylinders == 0) {
/* if no geometry, use a LBA compatible one */
cylinders = nb_sectors / (16 * 63);
if (cylinders > 16383)
cylinders = 16383;
else if (cylinders < 2)
cylinders = 2;
s->cylinders = cylinders;
s->heads = 16;
s->sectors = 63;
}
}
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
s->is_cdrom = 1;
bdrv_set_change_cb(s->bs, cdrom_change_cb, s);
}
}
s->irq = irq;
ide_reset(s);
}
register_ioport_write(iobase, 8, 1, ide_ioport_write, ide_state);
register_ioport_read(iobase, 8, 1, ide_ioport_read, ide_state);
if (iobase2) {
register_ioport_read(iobase2, 1, 1, ide_status_read, ide_state);
register_ioport_write(iobase2, 1, 1, ide_cmd_write, ide_state);
}
/* data ports */
register_ioport_write(iobase, 2, 2, ide_data_writew, ide_state);
register_ioport_read(iobase, 2, 2, ide_data_readw, ide_state);
register_ioport_write(iobase, 4, 4, ide_data_writel, ide_state);
register_ioport_read(iobase, 4, 4, ide_data_readl, ide_state);
}
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