WebSVN – HelenOS – Diff – /branches/dd/kernel/generic/src/console/console.c

 /*
  * Copyright (c) 2003 Josef Cejka
  * Copyright (c) 2005 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /** @addtogroup genericconsole
  * @{
  */
 /** @file
  */
 #include <console/console.h>
 #include <console/chardev.h>
 #include <sysinfo/sysinfo.h>
 #include <synch/waitq.h>
 #include <synch/spinlock.h>
 #include <arch/types.h>
 #include <ddi/irq.h>
 #include <ddi/ddi.h>
 #include <ipc/event.h>
 #include <ipc/irq.h>
 #include <arch.h>
-#include <func.h>
 #include <print.h>
 #include <putchar.h>
 #include <atomic.h>
 #include <syscall/copy.h>
 #include <errno.h>
 #include <string.h>
 #define KLOG_PAGES    4
 #define KLOG_LENGTH   (KLOG_PAGES * PAGE_SIZE / sizeof(wchar_t))
 #define KLOG_LATENCY  8
 /** Kernel log cyclic buffer */
 static wchar_t klog[KLOG_LENGTH] __attribute__ ((aligned (PAGE_SIZE)));
 /** Kernel log initialized */
 static bool klog_inited = false;
 /** First kernel log characters */
 static index_t klog_start = 0;
 /** Number of valid kernel log characters */
 static size_t klog_len = 0;
 /** Number of stored (not printed) kernel log characters */
 static size_t klog_stored = 0;
 /** Number of stored kernel log characters for uspace */
 static size_t klog_uspace = 0;
-/** Silence output */
-bool silent = false;
 /** Kernel log spinlock */
 SPINLOCK_INITIALIZE(klog_lock);
 /** Physical memory area used for klog buffer */
 static parea_t klog_parea;
+static indev_operations_t stdin_ops = {
+    .poll = NULL
+};
+/** Silence output */
+bool silent = false;
 /** Standard input and output character devices */
 indev_t *stdin = NULL;
 outdev_t *stdout = NULL;
+indev_t *stdin_wire(void)
+{
+    if (stdin == NULL) {
+        stdin = malloc(sizeof(indev_t), FRAME_ATOMIC);
+        if (stdin != NULL)
+            indev_initialize("stdin", stdin, &stdin_ops);
+    }
+    return stdin;
+}
 /** Initialize kernel logging facility
+ *
  * The shared area contains kernel cyclic buffer. Userspace application may
  * be notified on new data with indication of position and size
  * of the data within the circular buffer.
+ *
  */
 void klog_init(void)
+{
     void *faddr = (void *) KA2PA(klog);
     ASSERT((uintptr_t) faddr % FRAME_SIZE == 0);
     klog_parea.pbase = (uintptr_t) faddr;
     klog_parea.frames = SIZE2FRAMES(sizeof(klog));
     ddi_parea_register(&klog_parea);
     sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr);
     sysinfo_set_item_val("klog.pages", NULL, KLOG_PAGES);
     spinlock_lock(&klog_lock);
     klog_inited = true;
     spinlock_unlock(&klog_lock);
+}
 void grab_console(void)
+{
+    bool prev = silent;
     silent = false;
     arch_grab_console();
+    /* Force the console to print the prompt */
+    if ((stdin) && (prev))
+        indev_push_character(stdin, '\n');
+}
 void release_console(void)
+{
     silent = true;
     arch_release_console();
+}
 /** Tell kernel to get keyboard/console access again */
 unative_t sys_debug_enable_console(void)
+{
 #ifdef CONFIG_KCONSOLE
     grab_console();
     return true;
 #else
     return false;
 #endif
+}
 /** Tell kernel to relinquish keyboard/console access */
 unative_t sys_debug_disable_console(void)
+{
     release_console();
     return true;
+}
-bool check_poll(indev_t *indev)
-{
-    if (indev == NULL)
-        return false;
-    if (indev->op == NULL)
-        return false;
-    return (indev->op->poll != NULL);
-}
-/** Get character from input character device. Do not echo character.
- *
- * @param indev Input character device.
- * @return Character read.
- *
- */
-wchar_t _getc(indev_t *indev)
-{
-    if (atomic_get(&haltstate)) {
-        /* If we are here, we are hopefully on the processor that
-         * issued the 'halt' command, so proceed to read the character
-         * directly from input
-         */
-        if (check_poll(indev))
-            return indev->op->poll(indev);
-        /* No other way of interacting with user */
-        interrupts_disable();
-        if (CPU)
-            printf("cpu%u: ", CPU->id);
-        else
-            printf("cpu: ");
-        printf("halted (no polling input)\n");
-        cpu_halt();
-    }
-    waitq_sleep(&indev->wq);
-    ipl_t ipl = interrupts_disable();
-    spinlock_lock(&indev->lock);
-    wchar_t ch = indev->buffer[(indev->index - indev->counter) % INDEV_BUFLEN];
-    indev->counter--;
-    spinlock_unlock(&indev->lock);
-    interrupts_restore(ipl);
-    return ch;
-}
 /** Get string from input character device.
+ *
  * Read characters from input character device until first occurrence
  * of newline character.
+ *
  * @param indev  Input character device.
  * @param buf    Buffer where to store string terminated by NULL.
  * @param buflen Size of the buffer.
+ *
  * @return Number of characters read.
+ *
  */
 count_t gets(indev_t *indev, char *buf, size_t buflen)
+{
     size_t offset = 0;
     count_t count = 0;
     buf[offset] = 0;
     wchar_t ch;
-    while ((ch = _getc(indev)) != '\n') {
+    while ((ch = indev_pop_character(indev)) != '\n') {
         if (ch == '\b') {
             if (count > 0) {
                 /* Space, backspace, space */
                 putchar('\b');
                 putchar(' ');
                 putchar('\b');
                 count--;
                 offset = str_lsize(buf, count);
                 buf[offset] = 0;
+            }
+        }
         if (chr_encode(ch, buf, &offset, buflen - 1) == EOK) {
             putchar(ch);
             count++;
             buf[offset] = 0;
+        }
+    }
     return count;
+}
 /** Get character from input device & echo it to screen */
 wchar_t getc(indev_t *indev)
+{
-    wchar_t ch = _getc(indev);
+    wchar_t ch = indev_pop_character(indev);
     putchar(ch);
     return ch;
+}
 void klog_update(void)
+{
     spinlock_lock(&klog_lock);
     if ((klog_inited) && (event_is_subscribed(EVENT_KLOG)) && (klog_uspace > 0)) {
         event_notify_3(EVENT_KLOG, klog_start, klog_len, klog_uspace);
         klog_uspace = 0;
+    }
     spinlock_unlock(&klog_lock);
+}
 void putchar(const wchar_t ch)
+{
     spinlock_lock(&klog_lock);
     if ((klog_stored > 0) && (stdout) && (stdout->op->write)) {
         /* Print charaters stored in kernel log */
         index_t i;
         for (i = klog_len - klog_stored; i < klog_len; i++)
             stdout->op->write(stdout, klog[(klog_start + i) % KLOG_LENGTH], silent);
         klog_stored = 0;
+    }
     /* Store character in the cyclic kernel log */
     klog[(klog_start + klog_len) % KLOG_LENGTH] = ch;
     if (klog_len < KLOG_LENGTH)
         klog_len++;
     else
         klog_start = (klog_start + 1) % KLOG_LENGTH;
     if ((stdout) && (stdout->op->write))
         stdout->op->write(stdout, ch, silent);
     else {
         /* The character is just in the kernel log */
         if (klog_stored < klog_len)
             klog_stored++;
+    }
     /* The character is stored for uspace */
     if (klog_uspace < klog_len)
         klog_uspace++;
     /* Check notify uspace to update */
     bool update;
     if ((klog_uspace > KLOG_LATENCY) || (ch == '\n'))
         update = true;
     else
         update = false;
     spinlock_unlock(&klog_lock);
     if (update)
         klog_update();
+}
 /** Print using kernel facility
+ *
  * Print to kernel log.
+ *
  */
 unative_t sys_klog(int fd, const void *buf, size_t size)
+{
     char *data;
     int rc;
     if (size > PAGE_SIZE)
         return ELIMIT;
     if (size > 0) {
         data = (char *) malloc(size + 1, 0);
         if (!data)
             return ENOMEM;
         rc = copy_from_uspace(data, buf, size);
         if (rc) {
             free(data);
             return rc;
+        }
         data[size] = 0;
         printf("%s", data);
         free(data);
     } else
         klog_update();
     return size;
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)/branches/dd/kernel/generic/src/console/console.c – Rev 4296 → 4420