pintos/src/devices/ide.c File Reference

#include "devices/ide.h"
#include <ctype.h>
#include <debug.h>
#include <stdbool.h>
#include <stdio.h>
#include "devices/block.h"
#include "devices/partition.h"
#include "devices/timer.h"
#include "threads/io.h"
#include "threads/interrupt.h"
#include "threads/synch.h"

Go to the source code of this file.

Data Structures
struct	ata_disk
struct	channel
Defines
#define	reg_data(CHANNEL)   ((CHANNEL)->reg_base + 0)
#define	reg_error(CHANNEL)   ((CHANNEL)->reg_base + 1)
#define	reg_nsect(CHANNEL)   ((CHANNEL)->reg_base + 2)
#define	reg_lbal(CHANNEL)   ((CHANNEL)->reg_base + 3)
#define	reg_lbam(CHANNEL)   ((CHANNEL)->reg_base + 4)
#define	reg_lbah(CHANNEL)   ((CHANNEL)->reg_base + 5)
#define	reg_device(CHANNEL)   ((CHANNEL)->reg_base + 6)
#define	reg_status(CHANNEL)   ((CHANNEL)->reg_base + 7)
#define	reg_command(CHANNEL)   reg_status (CHANNEL)
#define	reg_ctl(CHANNEL)   ((CHANNEL)->reg_base + 0x206)
#define	reg_alt_status(CHANNEL)   reg_ctl (CHANNEL)
#define	STA_BSY   0x80
#define	STA_DRDY   0x40
#define	STA_DRQ   0x08
#define	CTL_SRST   0x04
#define	DEV_MBS   0xa0
#define	DEV_LBA   0x40
#define	DEV_DEV   0x10
#define	CMD_IDENTIFY_DEVICE   0xec
#define	CMD_READ_SECTOR_RETRY   0x20
#define	CMD_WRITE_SECTOR_RETRY   0x30
#define	CHANNEL_CNT   2
Functions
static void	reset_channel (struct channel *)
static bool	check_device_type (struct ata_disk *)
static void	identify_ata_device (struct ata_disk *)
static void	select_sector (struct ata_disk *, block_sector_t)
static void	issue_pio_command (struct channel *, uint8_t command)
static void	input_sector (struct channel *, void *)
static void	output_sector (struct channel *, const void *)
static void	wait_until_idle (const struct ata_disk *)
static bool	wait_while_busy (const struct ata_disk *)
static void	select_device (const struct ata_disk *)
static void	select_device_wait (const struct ata_disk *)
static void	interrupt_handler (struct intr_frame *)
void	ide_init (void)
static char *	descramble_ata_string (char *, int size)
static void	ide_read (void *d_, block_sector_t sec_no, void *buffer)
static void	ide_write (void *d_, block_sector_t sec_no, const void *buffer)
Variables
static struct channel	channels [CHANNEL_CNT]
static struct block_operations	ide_operations

---

Define Documentation

#define CHANNEL_CNT   2

Definition at line 80 of file ide.c.

Referenced by ide_init(), and interrupt_handler().

#define CMD_IDENTIFY_DEVICE   0xec

Definition at line 50 of file ide.c.

Referenced by identify_ata_device().

#define CMD_READ_SECTOR_RETRY   0x20

Definition at line 51 of file ide.c.

Referenced by ide_read().

#define CMD_WRITE_SECTOR_RETRY   0x30

Definition at line 52 of file ide.c.

Referenced by ide_write().

#define CTL_SRST   0x04

Definition at line 40 of file ide.c.

Referenced by reset_channel().

#define DEV_DEV   0x10

Definition at line 45 of file ide.c.

Referenced by select_device(), and select_sector().

#define DEV_LBA   0x40

Definition at line 44 of file ide.c.

Referenced by select_sector().

#define DEV_MBS   0xa0

Definition at line 43 of file ide.c.

Referenced by select_device(), and select_sector().

#define reg_alt_status

(

CHANNEL

)

reg_ctl (CHANNEL)

Definition at line 32 of file ide.c.

Referenced by select_device(), and wait_while_busy().

#define reg_command

(

CHANNEL

)

reg_status (CHANNEL)

Definition at line 26 of file ide.c.

Referenced by issue_pio_command().

#define reg_ctl

(

CHANNEL

)

((CHANNEL)->reg_base + 0x206)

Definition at line 31 of file ide.c.

Referenced by reset_channel().

#define reg_data

(

CHANNEL

)

((CHANNEL)->reg_base + 0)

Definition at line 18 of file ide.c.

Referenced by input_sector(), and output_sector().

#define reg_device

(

CHANNEL

)

((CHANNEL)->reg_base + 6)

Definition at line 24 of file ide.c.

Referenced by select_device(), and select_sector().

#define reg_error

(

CHANNEL

)

((CHANNEL)->reg_base + 1)

Definition at line 19 of file ide.c.

Referenced by check_device_type().

#define reg_lbah

(

CHANNEL

)

((CHANNEL)->reg_base + 5)

Definition at line 23 of file ide.c.

Referenced by check_device_type(), and select_sector().

#define reg_lbal

(

CHANNEL

)

((CHANNEL)->reg_base + 3)

Definition at line 21 of file ide.c.

Referenced by reset_channel(), and select_sector().

#define reg_lbam

(

CHANNEL

)

((CHANNEL)->reg_base + 4)

Definition at line 22 of file ide.c.

Referenced by check_device_type(), and select_sector().

#define reg_nsect

(

CHANNEL

)

((CHANNEL)->reg_base + 2)

Definition at line 20 of file ide.c.

Referenced by reset_channel(), and select_sector().

#define reg_status

(

CHANNEL

)

((CHANNEL)->reg_base + 7)

Definition at line 25 of file ide.c.

Referenced by check_device_type(), interrupt_handler(), and wait_until_idle().

#define STA_BSY   0x80

Definition at line 35 of file ide.c.

Referenced by check_device_type(), wait_until_idle(), and wait_while_busy().

#define STA_DRDY   0x40

Definition at line 36 of file ide.c.

Referenced by check_device_type().

#define STA_DRQ   0x08

Definition at line 37 of file ide.c.

Referenced by wait_until_idle(), and wait_while_busy().

---

Function Documentation

static bool check_device_type

(

struct ata_disk *

d

)

[static]

Definition at line 231 of file ide.c.

References ata_disk::channel, ata_disk::dev_no, inb(), ata_disk::is_ata, reg_error, reg_lbah, reg_lbam, reg_status, select_device(), STA_BSY, and STA_DRDY.

Referenced by ide_init().

static char * descramble_ata_string	(	char *	string,
		int	size
	)			[static]

Definition at line 317 of file ide.c.

References isspace().

Referenced by identify_ata_device().

void ide_init

(

void

)

Definition at line 103 of file ide.c.

References ata_disk::channel, CHANNEL_CNT, channels, check_device_type(), channel::completion_wait, ata_disk::dev_no, channel::devices, channel::expecting_interrupt, identify_ata_device(), interrupt_handler(), intr_register_ext(), channel::irq, ata_disk::is_ata, channel::lock, lock_init(), ata_disk::name, channel::name, NOT_REACHED, channel::reg_base, reset_channel(), sema_init(), and snprintf().

Referenced by main().

static void ide_read	(	void *	d_,
		block_sector_t	sec_no,
		void *	buffer
	)			[static]

Definition at line 346 of file ide.c.

References ata_disk::channel, CMD_READ_SECTOR_RETRY, channel::completion_wait, input_sector(), issue_pio_command(), channel::lock, lock_acquire(), lock_release(), ata_disk::name, PANIC, PRDSNu, select_sector(), sema_down(), and wait_while_busy().

static void ide_write	(	void *	d_,
		block_sector_t	sec_no,
		const void *	buffer
	)			[static]

Definition at line 366 of file ide.c.

References ata_disk::channel, CMD_WRITE_SECTOR_RETRY, channel::completion_wait, issue_pio_command(), channel::lock, lock_acquire(), lock_release(), ata_disk::name, output_sector(), PANIC, PRDSNu, select_sector(), sema_down(), and wait_while_busy().

static void identify_ata_device

(

struct ata_disk *

d

)

[static]

Definition at line 261 of file ide.c.

References ASSERT, BLOCK_RAW, block_register(), BLOCK_SECTOR_SIZE, ata_disk::channel, CMD_IDENTIFY_DEVICE, channel::completion_wait, descramble_ata_string(), ide_operations, input_sector(), ata_disk::is_ata, issue_pio_command(), ata_disk::name, partition_scan(), print_human_readable_size(), printf(), select_device_wait(), sema_down(), snprintf(), and wait_while_busy().

Referenced by ide_init().

static void input_sector	(	struct channel *	c,
		void *	sector
	)			[static]

Definition at line 421 of file ide.c.

References BLOCK_SECTOR_SIZE, insw(), and reg_data.

Referenced by ide_read(), and identify_ata_device().

static void interrupt_handler

(

struct intr_frame *

f

)

[static]

Definition at line 508 of file ide.c.

References CHANNEL_CNT, channels, channel::completion_wait, channel::expecting_interrupt, inb(), channel::irq, channel::name, NOT_REACHED, printf(), reg_status, sema_up(), and intr_frame::vec_no.

Referenced by ide_init().

static void issue_pio_command	(	struct channel *	c,
		uint8_t	command
	)			[static]

Definition at line 408 of file ide.c.

References ASSERT, channel::expecting_interrupt, intr_get_level(), INTR_ON, outb(), and reg_command.

Referenced by ide_read(), ide_write(), and identify_ata_device().

static void output_sector	(	struct channel *	c,
		const void *	sector
	)			[static]

Definition at line 429 of file ide.c.

References BLOCK_SECTOR_SIZE, outsw(), and reg_data.

Referenced by ide_write().

static void reset_channel

(

struct channel *

c

)

[static]

Definition at line 166 of file ide.c.

References CTL_SRST, ata_disk::dev_no, channel::devices, inb(), outb(), reg_ctl, reg_lbal, reg_nsect, select_device(), timer_msleep(), timer_usleep(), and wait_while_busy().

Referenced by ide_init().

static void select_device

(

const struct ata_disk *

d

)

[static]

Definition at line 485 of file ide.c.

References ata_disk::channel, DEV_DEV, DEV_MBS, ata_disk::dev_no, inb(), outb(), reg_alt_status, reg_device, and timer_nsleep().

Referenced by check_device_type(), reset_channel(), and select_device_wait().

static void select_device_wait

(

const struct ata_disk *

d

)

[static]

Definition at line 499 of file ide.c.

References select_device(), and wait_until_idle().

Referenced by identify_ata_device(), and select_sector().

static void select_sector	(	struct ata_disk *	d,
		block_sector_t	sec_no
	)			[static]

Definition at line 390 of file ide.c.

References ASSERT, ata_disk::channel, DEV_DEV, DEV_LBA, DEV_MBS, ata_disk::dev_no, outb(), reg_device, reg_lbah, reg_lbal, reg_lbam, reg_nsect, and select_device_wait().

Referenced by ide_read(), and ide_write().

static void wait_until_idle

(

const struct ata_disk *

d

)

[static]

Definition at line 442 of file ide.c.

References ata_disk::channel, inb(), ata_disk::name, printf(), reg_status, STA_BSY, STA_DRQ, and timer_usleep().

Referenced by select_device_wait().

static bool wait_while_busy

(

const struct ata_disk *

d

)

[static]

Definition at line 461 of file ide.c.

References ata_disk::channel, inb(), ata_disk::name, printf(), reg_alt_status, STA_BSY, STA_DRQ, and timer_msleep().

Referenced by ide_read(), ide_write(), identify_ata_device(), and reset_channel().

---

Variable Documentation

struct channel channels[CHANNEL_CNT] [static]

Definition at line 81 of file ide.c.

Referenced by ide_init(), and interrupt_handler().

static struct block_operations ide_operations [static, read]

Initial value:

  {
    ide_read,
    ide_write
  }

Definition at line 83 of file ide.c.

Referenced by identify_ata_device().