#include <linux/workqueue.h>
#include <linux/tty_driver.h>
#include <linux/tty_ldisc.h>
+#include <linux/screen_info.h>
+#include <linux/mutex.h>
#include <asm/system.h>
#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
#define NR_LDISCS 16
-/*
- * These are set up by the setup-routine at boot-time:
- */
-
-struct screen_info {
- u8 orig_x; /* 0x00 */
- u8 orig_y; /* 0x01 */
- u16 dontuse1; /* 0x02 -- EXT_MEM_K sits here */
- u16 orig_video_page; /* 0x04 */
- u8 orig_video_mode; /* 0x06 */
- u8 orig_video_cols; /* 0x07 */
- u16 unused2; /* 0x08 */
- u16 orig_video_ega_bx; /* 0x0a */
- u16 unused3; /* 0x0c */
- u8 orig_video_lines; /* 0x0e */
- u8 orig_video_isVGA; /* 0x0f */
- u16 orig_video_points; /* 0x10 */
-
- /* VESA graphic mode -- linear frame buffer */
- u16 lfb_width; /* 0x12 */
- u16 lfb_height; /* 0x14 */
- u16 lfb_depth; /* 0x16 */
- u32 lfb_base; /* 0x18 */
- u32 lfb_size; /* 0x1c */
- u16 dontuse2, dontuse3; /* 0x20 -- CL_MAGIC and CL_OFFSET here */
- u16 lfb_linelength; /* 0x24 */
- u8 red_size; /* 0x26 */
- u8 red_pos; /* 0x27 */
- u8 green_size; /* 0x28 */
- u8 green_pos; /* 0x29 */
- u8 blue_size; /* 0x2a */
- u8 blue_pos; /* 0x2b */
- u8 rsvd_size; /* 0x2c */
- u8 rsvd_pos; /* 0x2d */
- u16 vesapm_seg; /* 0x2e */
- u16 vesapm_off; /* 0x30 */
- u16 pages; /* 0x32 */
- u16 vesa_attributes; /* 0x34 */
- /* 0x36 -- 0x3f reserved for future expansion */
-};
-
-extern struct screen_info screen_info;
-
-#define ORIG_X (screen_info.orig_x)
-#define ORIG_Y (screen_info.orig_y)
-#define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
-#define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
-#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
-#define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
-#define ORIG_VIDEO_ISVGA (screen_info.orig_video_isVGA)
-#define ORIG_VIDEO_POINTS (screen_info.orig_video_points)
-
-#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
-#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
-#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
-#define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */
-#define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */
-#define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */
-
-#define VIDEO_TYPE_PICA_S3 0x30 /* ACER PICA-61 local S3 video */
-#define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */
-#define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */
-
-#define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
-
-#define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
-#define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
-
-#define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
-
/*
* This character is the same as _POSIX_VDISABLE: it cannot be used as
* a c_cc[] character, but indicates that a particular special character
*/
#define TTY_FLIPBUF_SIZE 512
-struct tty_flip_buffer {
+struct tty_buffer {
+ struct tty_buffer *next;
+ char *char_buf_ptr;
+ unsigned char *flag_buf_ptr;
+ int used;
+ int size;
+ int active;
+ int commit;
+ int read;
+ /* Data points here */
+ unsigned long data[0];
+};
+
+struct tty_bufhead {
struct work_struct work;
struct semaphore pty_sem;
- char *char_buf_ptr;
- unsigned char *flag_buf_ptr;
- int count;
- int buf_num;
- unsigned char char_buf[2*TTY_FLIPBUF_SIZE];
- char flag_buf[2*TTY_FLIPBUF_SIZE];
- unsigned char slop[4]; /* N.B. bug overwrites buffer by 1 */
+ spinlock_t lock;
+ struct tty_buffer *head; /* Queue head */
+ struct tty_buffer *tail; /* Active buffer */
+ struct tty_buffer *free; /* Free queue head */
};
/*
* The pty uses char_buf and flag_buf as a contiguous buffer
unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;
unsigned char low_latency:1, warned:1;
unsigned char ctrl_status;
+ unsigned int receive_room; /* Bytes free for queue */
struct tty_struct *link;
struct fasync_struct *fasync;
- struct tty_flip_buffer flip;
+ struct tty_bufhead buf;
int max_flip_cnt;
int alt_speed; /* For magic substitution of 38400 bps */
wait_queue_head_t write_wait;
int canon_data;
unsigned long canon_head;
unsigned int canon_column;
- struct semaphore atomic_read;
- struct semaphore atomic_write;
+ struct mutex atomic_read_lock;
+ struct mutex atomic_write_lock;
unsigned char *write_buf;
int write_cnt;
spinlock_t read_lock;
extern void stop_tty(struct tty_struct * tty);
extern void start_tty(struct tty_struct * tty);
extern int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc);
+extern int tty_unregister_ldisc(int disc);
extern int tty_register_driver(struct tty_driver *driver);
extern int tty_unregister_driver(struct tty_driver *driver);
extern void tty_register_device(struct tty_driver *driver, unsigned index, struct device *dev);
int buflen);
extern void tty_write_message(struct tty_struct *tty, char *msg);
+extern void tty_get_termios(struct tty_driver *drv, int idx, struct termios *tio);
+
extern int is_orphaned_pgrp(int pgrp);
extern int is_ignored(int sig);
extern int tty_signal(int sig, struct tty_struct *tty);
extern void tty_wakeup(struct tty_struct *tty);
extern void tty_ldisc_flush(struct tty_struct *tty);
-struct semaphore;
-extern struct semaphore tty_sem;
+extern struct mutex tty_mutex;
/* n_tty.c */
extern struct tty_ldisc tty_ldisc_N_TTY;
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