diff options
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 97 |
1 files changed, 17 insertions, 80 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 1267f88ece6ea..3787102e4b129 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -23,6 +23,7 @@ #include <linux/workqueue.h> #include <linux/tty_driver.h> #include <linux/tty_ldisc.h> +#include <linux/screen_info.h> #include <asm/system.h> @@ -37,77 +38,6 @@ #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 */ - u32 capabilities; /* 0x36 */ - /* 0x3a -- 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 * isn't in use (eg VINTR has no character etc) @@ -121,16 +51,22 @@ extern struct screen_info screen_info; */ #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; + /* 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 */ + 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 @@ -256,10 +192,11 @@ struct tty_struct { 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; |