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TinyEMU/ide.c
Fernando Lemos ca78c3138e Initial commit 
Imported from version 2019-02-10.
2019-02-26 11:12:06 +01:00

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/*
* IDE emulation
*
* Copyright (c) 2003-2016 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>
#include "cutils.h"
#include "ide.h"
//#define DEBUG_IDE
/* 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
#define MAX_MULT_SECTORS 128
typedef struct IDEState IDEState;
typedef void EndTransferFunc(IDEState *);
struct IDEState {
IDEIFState *ide_if;
BlockDevice *bs;
int cylinders, heads, sectors;
int mult_sectors;
int64_t nb_sectors;
/* 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;
int io_nb_sectors;
int req_nb_sectors;
EndTransferFunc *end_transfer_func;
int data_index;
int data_end;
uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
};
struct IDEIFState {
IRQSignal *irq;
IDEState *cur_drive;
IDEState *drives[2];
/* 0x3f6 command */
uint8_t cmd;
};
static void ide_sector_read_cb(void *opaque, int ret);
static void ide_sector_read_cb_end(IDEState *s);
static void ide_sector_write_cb2(void *opaque, int ret);
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++;
}
}
/* little endian assume */
static void stw(uint16_t *buf, int v)
{
*buf = v;
}
static void ide_identify(IDEState *s)
{
uint16_t *tab;
uint32_t oldsize;
tab = (uint16_t *)s->io_buffer;
memset(tab, 0, 512 * 2);
stw(tab + 0, 0x0040);
stw(tab + 1, s->cylinders);
stw(tab + 3, s->heads);
stw(tab + 4, 512 * s->sectors); /* sectors */
stw(tab + 5, 512); /* sector size */
stw(tab + 6, s->sectors);
stw(tab + 20, 3); /* buffer type */
stw(tab + 21, 512); /* cache size in sectors */
stw(tab + 22, 4); /* ecc bytes */
padstr((char *)(tab + 27), "RISCVEMU HARDDISK", 40);
stw(tab + 47, 0x8000 | MAX_MULT_SECTORS);
stw(tab + 48, 0); /* dword I/O */
stw(tab + 49, 1 << 9); /* LBA supported, no DMA */
stw(tab + 51, 0x200); /* PIO transfer cycle */
stw(tab + 52, 0x200); /* DMA transfer cycle */
stw(tab + 54, s->cylinders);
stw(tab + 55, s->heads);
stw(tab + 56, s->sectors);
oldsize = s->cylinders * s->heads * s->sectors;
stw(tab + 57, oldsize);
stw(tab + 58, oldsize >> 16);
if (s->mult_sectors)
stw(tab + 59, 0x100 | s->mult_sectors);
stw(tab + 60, s->nb_sectors);
stw(tab + 61, s->nb_sectors >> 16);
stw(tab + 80, (1 << 1) | (1 << 2));
stw(tab + 82, (1 << 14));
stw(tab + 83, (1 << 14));
stw(tab + 84, (1 << 14));
stw(tab + 85, (1 << 14));
stw(tab + 86, 0);
stw(tab + 87, (1 << 14));
}
static void ide_set_signature(IDEState *s)
{
s->select &= 0xf0;
s->nsector = 1;
s->sector = 1;
s->lcyl = 0;
s->hcyl = 0;
}
static void ide_abort_command(IDEState *s)
{
s->status = READY_STAT | ERR_STAT;
s->error = ABRT_ERR;
}
static void ide_set_irq(IDEState *s)
{
IDEIFState *ide_if = s->ide_if;
if (!(ide_if->cmd & IDE_CMD_DISABLE_IRQ)) {
set_irq(ide_if->irq, 1);
}
}
/* prepare data transfer and tell what to do after */
static void ide_transfer_start(IDEState *s, int size,
EndTransferFunc *end_transfer_func)
{
s->end_transfer_func = end_transfer_func;
s->data_index = 0;
s->data_end = size;
}
static void ide_transfer_stop(IDEState *s)
{
s->end_transfer_func = ide_transfer_stop;
s->data_index = 0;
s->data_end = 0;
}
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) & 0x0f);
s->hcyl = (sector_num >> 16) & 0xff;
s->lcyl = (sector_num >> 8) & 0xff;
s->sector = sector_num & 0xff;
} else {
cyl = sector_num / (s->heads * s->sectors);
r = sector_num % (s->heads * s->sectors);
s->hcyl = (cyl >> 8) & 0xff;
s->lcyl = cyl & 0xff;
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;
sector_num = ide_get_sector(s);
n = s->nsector;
if (n == 0)
n = 256;
if (n > s->req_nb_sectors)
n = s->req_nb_sectors;
#if defined(DEBUG_IDE)
printf("read sector=%" PRId64 " count=%d\n", sector_num, n);
#endif
s->io_nb_sectors = n;
ret = s->bs->read_async(s->bs, sector_num, s->io_buffer, n,
ide_sector_read_cb, s);
if (ret < 0) {
/* error */
ide_abort_command(s);
ide_set_irq(s);
} else if (ret == 0) {
/* synchronous case (needed for performance) */
ide_sector_read_cb(s, 0);
} else {
/* async case */
s->status = READY_STAT | SEEK_STAT | BUSY_STAT;
s->error = 0; /* not needed by IDE spec, but needed by Windows */
}
}
static void ide_sector_read_cb(void *opaque, int ret)
{
IDEState *s = opaque;
int n;
EndTransferFunc *func;
n = s->io_nb_sectors;
ide_set_sector(s, ide_get_sector(s) + n);
s->nsector = (s->nsector - n) & 0xff;
if (s->nsector == 0)
func = ide_sector_read_cb_end;
else
func = ide_sector_read;
ide_transfer_start(s, 512 * n, func);
ide_set_irq(s);
s->status = READY_STAT | SEEK_STAT | DRQ_STAT;
s->error = 0; /* not needed by IDE spec, but needed by Windows */
}
static void ide_sector_read_cb_end(IDEState *s)
{
/* no more sector to read from disk */
s->status = READY_STAT | SEEK_STAT;
s->error = 0; /* not needed by IDE spec, but needed by Windows */
ide_transfer_stop(s);
}
static void ide_sector_write_cb1(IDEState *s)
{
int64_t sector_num;
int ret;
ide_transfer_stop(s);
sector_num = ide_get_sector(s);
#if defined(DEBUG_IDE)
printf("write sector=%" PRId64 " count=%d\n",
sector_num, s->io_nb_sectors);
#endif
ret = s->bs->write_async(s->bs, sector_num, s->io_buffer, s->io_nb_sectors,
ide_sector_write_cb2, s);
if (ret < 0) {
/* error */
ide_abort_command(s);
ide_set_irq(s);
} else if (ret == 0) {
/* synchronous case (needed for performance) */
ide_sector_write_cb2(s, 0);
} else {
/* async case */
s->status = READY_STAT | SEEK_STAT | BUSY_STAT;
}
}
static void ide_sector_write_cb2(void *opaque, int ret)
{
IDEState *s = opaque;
int n;
n = s->io_nb_sectors;
ide_set_sector(s, ide_get_sector(s) + n);
s->nsector = (s->nsector - n) & 0xff;
if (s->nsector == 0) {
/* no more sectors to write */
s->status = READY_STAT | SEEK_STAT;
} else {
n = s->nsector;
if (n > s->req_nb_sectors)
n = s->req_nb_sectors;
s->io_nb_sectors = n;
ide_transfer_start(s, 512 * n, ide_sector_write_cb1);
s->status = READY_STAT | SEEK_STAT | DRQ_STAT;
}
ide_set_irq(s);
}
static void ide_sector_write(IDEState *s)
{
int n;
n = s->nsector;
if (n == 0)
n = 256;
if (n > s->req_nb_sectors)
n = s->req_nb_sectors;
s->io_nb_sectors = n;
ide_transfer_start(s, 512 * n, ide_sector_write_cb1);
s->status = READY_STAT | SEEK_STAT | DRQ_STAT;
}
static void ide_identify_cb(IDEState *s)
{
ide_transfer_stop(s);
s->status = READY_STAT;
}
static void ide_exec_cmd(IDEState *s, int val)
{
#if defined(DEBUG_IDE)
printf("ide: exec_cmd=0x%02x\n", val);
#endif
switch(val) {
case WIN_IDENTIFY:
ide_identify(s);
s->status = READY_STAT | SEEK_STAT | DRQ_STAT;
ide_transfer_start(s, 512, ide_identify_cb);
ide_set_irq(s);
break;
case WIN_SPECIFY:
case WIN_RECAL:
s->error = 0;
s->status = READY_STAT | SEEK_STAT;
ide_set_irq(s);
break;
case WIN_SETMULT:
if (s->nsector > MAX_MULT_SECTORS ||
(s->nsector & (s->nsector - 1)) != 0) {
ide_abort_command(s);
} else {
s->mult_sectors = s->nsector;
#if defined(DEBUG_IDE)
printf("ide: setmult=%d\n", s->mult_sectors);
#endif
s->status = READY_STAT;
}
ide_set_irq(s);
break;
case WIN_READ:
case WIN_READ_ONCE:
s->req_nb_sectors = 1;
ide_sector_read(s);
break;
case WIN_WRITE:
case WIN_WRITE_ONCE:
s->req_nb_sectors = 1;
ide_sector_write(s);
break;
case WIN_MULTREAD:
if (!s->mult_sectors) {
ide_abort_command(s);
ide_set_irq(s);
} else {
s->req_nb_sectors = s->mult_sectors;
ide_sector_read(s);
}
break;
case WIN_MULTWRITE:
if (!s->mult_sectors) {
ide_abort_command(s);
ide_set_irq(s);
} else {
s->req_nb_sectors = s->mult_sectors;
ide_sector_write(s);
}
break;
case WIN_READ_NATIVE_MAX:
ide_set_sector(s, s->nb_sectors - 1);
s->status = READY_STAT;
ide_set_irq(s);
break;
default:
ide_abort_command(s);
ide_set_irq(s);
break;
}
}
static void ide_ioport_write(void *opaque, uint32_t offset,
uint32_t val, int size_log2)
{
IDEIFState *s1 = opaque;
IDEState *s = s1->cur_drive;
int addr = offset + 1;
#ifdef DEBUG_IDE
printf("ide: write addr=0x%02x val=0x%02x\n", addr, val);
#endif
switch(addr) {
case 0:
break;
case 1:
if (s) {
s->feature = val;
}
break;
case 2:
if (s) {
s->nsector = val;
}
break;
case 3:
if (s) {
s->sector = val;
}
break;
case 4:
if (s) {
s->lcyl = val;
}
break;
case 5:
if (s) {
s->hcyl = val;
}
break;
case 6:
/* select drive */
s = s1->cur_drive = s1->drives[(val >> 4) & 1];
if (s) {
s->select = val;
}
break;
default:
case 7:
/* command */
if (s) {
ide_exec_cmd(s, val);
}
break;
}
}
static uint32_t ide_ioport_read(void *opaque, uint32_t offset, int size_log2)
{
IDEIFState *s1 = opaque;
IDEState *s = s1->cur_drive;
int ret, addr = offset + 1;
if (!s) {
ret = 0x00;
} else {
switch(addr) {
case 0:
ret = 0xff;
break;
case 1:
ret = s->error;
break;
case 2:
ret = s->nsector;
break;
case 3:
ret = s->sector;
break;
case 4:
ret = s->lcyl;
break;
case 5:
ret = s->hcyl;
break;
case 6:
ret = s->select;
break;
default:
case 7:
ret = s->status;
set_irq(s1->irq, 0);
break;
}
}
#ifdef DEBUG_IDE
printf("ide: read addr=0x%02x val=0x%02x\n", addr, ret);
#endif
return ret;
}
static uint32_t ide_status_read(void *opaque, uint32_t offset, int size_log2)
{
IDEIFState *s1 = opaque;
IDEState *s = s1->cur_drive;
int ret;
if (s) {
ret = s->status;
} else {
ret = 0;
}
#ifdef DEBUG_IDE
printf("ide: read status=0x%02x\n", ret);
#endif
return ret;
}
static void ide_cmd_write(void *opaque, uint32_t offset,
uint32_t val, int size_log2)
{
IDEIFState *s1 = opaque;
IDEState *s;
int i;
#ifdef DEBUG_IDE
printf("ide: cmd write=0x%02x\n", val);
#endif
if (!(s1->cmd & IDE_CMD_RESET) && (val & IDE_CMD_RESET)) {
/* low to high */
for(i = 0; i < 2; i++) {
s = s1->drives[i];
if (s) {
s->status = BUSY_STAT | SEEK_STAT;
s->error = 0x01;
}
}
} else if ((s1->cmd & IDE_CMD_RESET) && !(val & IDE_CMD_RESET)) {
/* high to low */
for(i = 0; i < 2; i++) {
s = s1->drives[i];
if (s) {
s->status = READY_STAT | SEEK_STAT;
ide_set_signature(s);
}
}
}
s1->cmd = val;
}
static void ide_data_writew(void *opaque, uint32_t offset,
uint32_t val, int size_log2)
{
IDEIFState *s1 = opaque;
IDEState *s = s1->cur_drive;
int p;
uint8_t *tab;
if (!s)
return;
p = s->data_index;
tab = s->io_buffer;
tab[p] = val & 0xff;
tab[p + 1] = (val >> 8) & 0xff;
p += 2;
s->data_index = p;
if (p >= s->data_end)
s->end_transfer_func(s);
}
static uint32_t ide_data_readw(void *opaque, uint32_t offset, int size_log2)
{
IDEIFState *s1 = opaque;
IDEState *s = s1->cur_drive;
int p, ret;
uint8_t *tab;
if (!s) {
ret = 0;
} else {
p = s->data_index;
tab = s->io_buffer;
ret = tab[p] | (tab[p + 1] << 8);
p += 2;
s->data_index = p;
if (p >= s->data_end)
s->end_transfer_func(s);
}
return ret;
}
static IDEState *ide_drive_init(IDEIFState *ide_if, BlockDevice *bs)
{
IDEState *s;
uint32_t cylinders;
uint64_t nb_sectors;
s = malloc(sizeof(*s));
memset(s, 0, sizeof(*s));
s->ide_if = ide_if;
s->bs = bs;
nb_sectors = s->bs->get_sector_count(s->bs);
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;
s->nb_sectors = nb_sectors;
s->mult_sectors = MAX_MULT_SECTORS;
/* ide regs */
s->feature = 0;
s->error = 0;
s->nsector = 0;
s->sector = 0;
s->lcyl = 0;
s->hcyl = 0;
s->select = 0xa0;
s->status = READY_STAT | SEEK_STAT;
/* init I/O buffer */
s->data_index = 0;
s->data_end = 0;
s->end_transfer_func = ide_transfer_stop;
s->req_nb_sectors = 0; /* temp for read/write */
s->io_nb_sectors = 0; /* temp for read/write */
return s;
}
IDEIFState *ide_init(PhysMemoryMap *port_map, uint32_t addr, uint32_t addr2,
IRQSignal *irq, BlockDevice **tab_bs)
{
int i;
IDEIFState *s;
s = malloc(sizeof(IDEIFState));
memset(s, 0, sizeof(*s));
s->irq = irq;
s->cmd = 0;
cpu_register_device(port_map, addr, 1, s, ide_data_readw, ide_data_writew,
DEVIO_SIZE16);
cpu_register_device(port_map, addr + 1, 7, s, ide_ioport_read, ide_ioport_write,
DEVIO_SIZE8);
if (addr2) {
cpu_register_device(port_map, addr2, 1, s, ide_status_read, ide_cmd_write,
DEVIO_SIZE8);
}
for(i = 0; i < 2; i++) {
if (tab_bs[i])
s->drives[i] = ide_drive_init(s, tab_bs[i]);
}
s->cur_drive = s->drives[0];
return s;
}
/* dummy PCI device for the IDE */
PCIDevice *piix3_ide_init(PCIBus *pci_bus, int devfn)
{
PCIDevice *d;
d = pci_register_device(pci_bus, "PIIX3 IDE", devfn, 0x8086, 0x7010, 0x00, 0x0101);
pci_device_set_config8(d, 0x09, 0x00); /* ISA IDE ports, no DMA */
return d;
}
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