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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/drivers/stdio_console.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/um/drivers/stdio_console.c')
-rw-r--r-- | arch/um/drivers/stdio_console.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c new file mode 100644 index 000000000000..e604d7c87695 --- /dev/null +++ b/arch/um/drivers/stdio_console.c @@ -0,0 +1,205 @@ +/* + * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include "linux/config.h" +#include "linux/posix_types.h" +#include "linux/tty.h" +#include "linux/tty_flip.h" +#include "linux/types.h" +#include "linux/major.h" +#include "linux/kdev_t.h" +#include "linux/console.h" +#include "linux/string.h" +#include "linux/sched.h" +#include "linux/list.h" +#include "linux/init.h" +#include "linux/interrupt.h" +#include "linux/slab.h" +#include "linux/hardirq.h" +#include "asm/current.h" +#include "asm/irq.h" +#include "stdio_console.h" +#include "line.h" +#include "chan_kern.h" +#include "user_util.h" +#include "kern_util.h" +#include "irq_user.h" +#include "mconsole_kern.h" +#include "init.h" +#include "2_5compat.h" + +#define MAX_TTYS (16) + +/* ----------------------------------------------------------------------------- */ + +/* Referenced only by tty_driver below - presumably it's locked correctly + * by the tty driver. + */ + +static struct tty_driver *console_driver; + +void stdio_announce(char *dev_name, int dev) +{ + printk(KERN_INFO "Virtual console %d assigned device '%s'\n", dev, + dev_name); +} + +static struct chan_opts opts = { + .announce = stdio_announce, + .xterm_title = "Virtual Console #%d", + .raw = 1, + .tramp_stack = 0, + .in_kernel = 1, +}; + +static int con_config(char *str); +static int con_get_config(char *dev, char *str, int size, char **error_out); +static int con_remove(char *str); + +static struct line_driver driver = { + .name = "UML console", + .device_name = "tty", + .devfs_name = "vc/", + .major = TTY_MAJOR, + .minor_start = 0, + .type = TTY_DRIVER_TYPE_CONSOLE, + .subtype = SYSTEM_TYPE_CONSOLE, + .read_irq = CONSOLE_IRQ, + .read_irq_name = "console", + .write_irq = CONSOLE_WRITE_IRQ, + .write_irq_name = "console-write", + .symlink_from = "ttys", + .symlink_to = "vc", + .mc = { + .name = "con", + .config = con_config, + .get_config = con_get_config, + .remove = con_remove, + }, +}; + +static struct lines console_lines = LINES_INIT(MAX_TTYS); + +/* The array is initialized by line_init, which is an initcall. The + * individual elements are protected by individual semaphores. + */ +struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver), + [ 1 ... MAX_TTYS - 1 ] = + LINE_INIT(CONFIG_CON_CHAN, &driver) }; + +static int con_config(char *str) +{ + return(line_config(vts, sizeof(vts)/sizeof(vts[0]), str)); +} + +static int con_get_config(char *dev, char *str, int size, char **error_out) +{ + return(line_get_config(dev, vts, sizeof(vts)/sizeof(vts[0]), str, + size, error_out)); +} + +static int con_remove(char *str) +{ + return(line_remove(vts, sizeof(vts)/sizeof(vts[0]), str)); +} + +static int con_open(struct tty_struct *tty, struct file *filp) +{ + return line_open(vts, tty, &opts); +} + +static int con_init_done = 0; + +static struct tty_operations console_ops = { + .open = con_open, + .close = line_close, + .write = line_write, + .write_room = line_write_room, + .chars_in_buffer = line_chars_in_buffer, + .set_termios = line_set_termios, + .ioctl = line_ioctl, +}; + +static void uml_console_write(struct console *console, const char *string, + unsigned len) +{ + struct line *line = &vts[console->index]; + + down(&line->sem); + console_write_chan(&line->chan_list, string, len); + up(&line->sem); +} + +static struct tty_driver *uml_console_device(struct console *c, int *index) +{ + *index = c->index; + return console_driver; +} + +static int uml_console_setup(struct console *co, char *options) +{ + struct line *line = &vts[co->index]; + + return console_open_chan(line,co,&opts); +} + +static struct console stdiocons = { + .name = "tty", + .write = uml_console_write, + .device = uml_console_device, + .setup = uml_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &vts, +}; + +int stdio_init(void) +{ + char *new_title; + + console_driver = line_register_devfs(&console_lines, &driver, + &console_ops, vts, + ARRAY_SIZE(vts)); + if (NULL == console_driver) + return -1; + printk(KERN_INFO "Initialized stdio console driver\n"); + + lines_init(vts, sizeof(vts)/sizeof(vts[0])); + + new_title = add_xterm_umid(opts.xterm_title); + if(new_title != NULL) + opts.xterm_title = new_title; + + con_init_done = 1; + register_console(&stdiocons); + return(0); +} +late_initcall(stdio_init); + +static void console_exit(void) +{ + if (!con_init_done) + return; + close_lines(vts, sizeof(vts)/sizeof(vts[0])); +} +__uml_exitcall(console_exit); + +static int console_chan_setup(char *str) +{ + return(line_setup(vts, sizeof(vts)/sizeof(vts[0]), str, 1)); +} +__setup("con", console_chan_setup); +__channel_help(console_chan_setup, "con"); + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ |