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510 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2003 Josef Cejka
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 * Copyright (c) 2005 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup genericconsole
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 * @{
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 */
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/** @file
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 */
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#include <console/console.h>
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#include <console/chardev.h>
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#include <sysinfo/sysinfo.h>
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#include <synch/waitq.h>
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#include <synch/spinlock.h>
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#include <arch/types.h>
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#include <ddi/irq.h>
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#include <ddi/ddi.h>
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#include <ipc/event.h>
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#include <ipc/irq.h>
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#include <arch.h>
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#include <print.h>
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#include <putchar.h>
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#include <atomic.h>
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#include <syscall/copy.h>
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#include <errno.h>
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#include <string.h>
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#define KLOG_PAGES    4
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#define KLOG_LENGTH   (KLOG_PAGES * PAGE_SIZE / sizeof(wchar_t))
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#define KLOG_LATENCY  8
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/** Kernel log cyclic buffer */
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static wchar_t klog[KLOG_LENGTH] __attribute__ ((aligned (PAGE_SIZE)));
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/** Kernel log initialized */
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static bool klog_inited = false;
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/** First kernel log characters */
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static index_t klog_start = 0;
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/** Number of valid kernel log characters */
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static size_t klog_len = 0;
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/** Number of stored (not printed) kernel log characters */
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static size_t klog_stored = 0;
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/** Number of stored kernel log characters for uspace */
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static size_t klog_uspace = 0;
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/** Kernel log spinlock */
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SPINLOCK_INITIALIZE(klog_lock);
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/** Physical memory area used for klog buffer */
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static parea_t klog_parea;
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4420 trochtova 78
static indev_operations_t stdin_ops = {
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    .poll = NULL
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};
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/** Silence output */
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bool silent = false;
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/** Standard input and output character devices */
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indev_t *stdin = NULL;
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outdev_t *stdout = NULL;
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indev_t *stdin_wire(void)
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{
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    if (stdin == NULL) {
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        stdin = malloc(sizeof(indev_t), FRAME_ATOMIC);
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        if (stdin != NULL)
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            indev_initialize("stdin", stdin, &stdin_ops);
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    }
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    return stdin;
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}
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/** Initialize kernel logging facility
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 *
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 * The shared area contains kernel cyclic buffer. Userspace application may
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 * be notified on new data with indication of position and size
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 * of the data within the circular buffer.
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 *
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 */
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void klog_init(void)
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{
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    void *faddr = (void *) KA2PA(klog);
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111
    ASSERT((uintptr_t) faddr % FRAME_SIZE == 0);
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113
    klog_parea.pbase = (uintptr_t) faddr;
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    klog_parea.frames = SIZE2FRAMES(sizeof(klog));
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    ddi_parea_register(&klog_parea);
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    sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr);
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    sysinfo_set_item_val("klog.pages", NULL, KLOG_PAGES);
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    spinlock_lock(&klog_lock);
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    klog_inited = true;
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    spinlock_unlock(&klog_lock);
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}
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125
void grab_console(void)
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{
4420 trochtova 127
    bool prev = silent;
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    silent = false;
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    arch_grab_console();
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    /* Force the console to print the prompt */
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    if ((stdin) && (prev))
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        indev_push_character(stdin, '\n');
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}
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137
void release_console(void)
138
{
139
    silent = true;
140
    arch_release_console();
141
}
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4156 trochtova 143
/** Tell kernel to get keyboard/console access again */
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unative_t sys_debug_enable_console(void)
145
{
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#ifdef CONFIG_KCONSOLE
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    grab_console();
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    return true;
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#else
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    return false;
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#endif
152
}
153
 
154
/** Tell kernel to relinquish keyboard/console access */
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unative_t sys_debug_disable_console(void)
156
{
157
    release_console();
158
    return true;
159
}
160
 
161
/** Get string from input character device.
510 jermar 162
 *
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 * Read characters from input character device until first occurrence
510 jermar 164
 * of newline character.
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 *
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 * @param indev  Input character device.
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 * @param buf    Buffer where to store string terminated by NULL.
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 * @param buflen Size of the buffer.
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 *
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 * @return Number of characters read.
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 *
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 */
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count_t gets(indev_t *indev, char *buf, size_t buflen)
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{
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    size_t offset = 0;
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    count_t count = 0;
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    buf[offset] = 0;
4055 trochtova 178
 
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    wchar_t ch;
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    while ((ch = indev_pop_character(indev)) != '\n') {
588 palkovsky 181
        if (ch == '\b') {
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            if (count > 0) {
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                /* Space, backspace, space */
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                putchar('\b');
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                putchar(' ');
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                putchar('\b');
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188
                count--;
189
                offset = str_lsize(buf, count);
190
                buf[offset] = 0;
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            }
510 jermar 192
        }
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        if (chr_encode(ch, buf, &offset, buflen - 1) == EOK) {
194
            putchar(ch);
195
            count++;
196
            buf[offset] = 0;
197
        }
510 jermar 198
    }
4156 trochtova 199
 
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    return count;
510 jermar 201
}
202
 
4156 trochtova 203
/** Get character from input device & echo it to screen */
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wchar_t getc(indev_t *indev)
510 jermar 205
{
4420 trochtova 206
    wchar_t ch = indev_pop_character(indev);
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    putchar(ch);
510 jermar 208
    return ch;
209
}
575 palkovsky 210
 
4055 trochtova 211
void klog_update(void)
212
{
213
    spinlock_lock(&klog_lock);
214
 
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    if ((klog_inited) && (event_is_subscribed(EVENT_KLOG)) && (klog_uspace > 0)) {
216
        event_notify_3(EVENT_KLOG, klog_start, klog_len, klog_uspace);
217
        klog_uspace = 0;
218
    }
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220
    spinlock_unlock(&klog_lock);
221
}
222
 
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void putchar(const wchar_t ch)
575 palkovsky 224
{
4055 trochtova 225
    spinlock_lock(&klog_lock);
226
 
4156 trochtova 227
    if ((klog_stored > 0) && (stdout) && (stdout->op->write)) {
4055 trochtova 228
        /* Print charaters stored in kernel log */
229
        index_t i;
230
        for (i = klog_len - klog_stored; i < klog_len; i++)
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            stdout->op->write(stdout, klog[(klog_start + i) % KLOG_LENGTH], silent);
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        klog_stored = 0;
233
    }
234
 
235
    /* Store character in the cyclic kernel log */
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    klog[(klog_start + klog_len) % KLOG_LENGTH] = ch;
237
    if (klog_len < KLOG_LENGTH)
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        klog_len++;
239
    else
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        klog_start = (klog_start + 1) % KLOG_LENGTH;
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    if ((stdout) && (stdout->op->write))
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        stdout->op->write(stdout, ch, silent);
4055 trochtova 244
    else {
245
        /* The character is just in the kernel log */
246
        if (klog_stored < klog_len)
247
            klog_stored++;
248
    }
249
 
250
    /* The character is stored for uspace */
251
    if (klog_uspace < klog_len)
252
        klog_uspace++;
253
 
254
    /* Check notify uspace to update */
255
    bool update;
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    if ((klog_uspace > KLOG_LATENCY) || (ch == '\n'))
4055 trochtova 257
        update = true;
258
    else
259
        update = false;
260
 
261
    spinlock_unlock(&klog_lock);
262
 
263
    if (update)
264
        klog_update();
575 palkovsky 265
}
1702 cejka 266
 
4156 trochtova 267
/** Print using kernel facility
268
 *
269
 * Print to kernel log.
270
 *
271
 */
4296 trochtova 272
unative_t sys_klog(int fd, const void *buf, size_t size)
4156 trochtova 273
{
274
    char *data;
275
    int rc;
4201 trochtova 276
 
4296 trochtova 277
    if (size > PAGE_SIZE)
4156 trochtova 278
        return ELIMIT;
279
 
4296 trochtova 280
    if (size > 0) {
281
        data = (char *) malloc(size + 1, 0);
4156 trochtova 282
        if (!data)
283
            return ENOMEM;
284
 
4296 trochtova 285
        rc = copy_from_uspace(data, buf, size);
4156 trochtova 286
        if (rc) {
287
            free(data);
288
            return rc;
289
        }
4296 trochtova 290
        data[size] = 0;
4156 trochtova 291
 
292
        printf("%s", data);
293
        free(data);
294
    } else
295
        klog_update();
296
 
4296 trochtova 297
    return size;
4156 trochtova 298
}
299
 
1888 jermar 300
/** @}
1702 cejka 301
 */