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:
+ */