WebSVN – HelenOS – Diff – /trunk/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 <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;
 
/** 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)
{
    silent = false;
    arch_grab_console();
   
    /* Force the console to print the prompt */
    if (stdin)
        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;
}
 
/** 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 = 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 = 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;
}
 
/** @}
 */
 

Rev 4310	Rev 4318
1	/*	1	/*
2	* Copyright (c) 2003 Josef Cejka	2	* Copyright (c) 2003 Josef Cejka
3	* Copyright (c) 2005 Jakub Jermar	3	* Copyright (c) 2005 Jakub Jermar
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup genericconsole	30	/** @addtogroup genericconsole
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*/	34	*/
35		35
36	#include <console/console.h>	36	#include <console/console.h>
37	#include <console/chardev.h>	37	#include <console/chardev.h>
38	#include <sysinfo/sysinfo.h>	38	#include <sysinfo/sysinfo.h>
39	#include <synch/waitq.h>	39	#include <synch/waitq.h>
40	#include <synch/spinlock.h>	40	#include <synch/spinlock.h>
41	#include <arch/types.h>	41	#include <arch/types.h>
42	#include <ddi/irq.h>	42	#include <ddi/irq.h>
43	#include <ddi/ddi.h>	43	#include <ddi/ddi.h>
44	#include <ipc/event.h>	44	#include <ipc/event.h>
45	#include <ipc/irq.h>	45	#include <ipc/irq.h>
46	#include <arch.h>	46	#include <arch.h>
47	#include <print.h>	47	#include <print.h>
48	#include <putchar.h>	48	#include <putchar.h>
49	#include <atomic.h>	49	#include <atomic.h>
50	#include <syscall/copy.h>	50	#include <syscall/copy.h>
51	#include <errno.h>	51	#include <errno.h>
52	#include <string.h>	52	#include <string.h>
53		53
54	#define KLOG_PAGES 4	54	#define KLOG_PAGES 4
55	#define KLOG_LENGTH (KLOG_PAGES * PAGE_SIZE / sizeof(wchar_t))	55	#define KLOG_LENGTH (KLOG_PAGES * PAGE_SIZE / sizeof(wchar_t))
56	#define KLOG_LATENCY 8	56	#define KLOG_LATENCY 8
57		57
58	/** Kernel log cyclic buffer */	58	/** Kernel log cyclic buffer */
59	static wchar_t klog[KLOG_LENGTH] __attribute__ ((aligned (PAGE_SIZE)));	59	static wchar_t klog[KLOG_LENGTH] __attribute__ ((aligned (PAGE_SIZE)));
60		60
61	/** Kernel log initialized */	61	/** Kernel log initialized */
62	static bool klog_inited = false;	62	static bool klog_inited = false;
63	/** First kernel log characters */	63	/** First kernel log characters */
64	static index_t klog_start = 0;	64	static index_t klog_start = 0;
65	/** Number of valid kernel log characters */	65	/** Number of valid kernel log characters */
66	static size_t klog_len = 0;	66	static size_t klog_len = 0;
67	/** Number of stored (not printed) kernel log characters */	67	/** Number of stored (not printed) kernel log characters */
68	static size_t klog_stored = 0;	68	static size_t klog_stored = 0;
69	/** Number of stored kernel log characters for uspace */	69	/** Number of stored kernel log characters for uspace */
70	static size_t klog_uspace = 0;	70	static size_t klog_uspace = 0;
71		71
72	/** Kernel log spinlock */	72	/** Kernel log spinlock */
73	SPINLOCK_INITIALIZE(klog_lock);	73	SPINLOCK_INITIALIZE(klog_lock);
74		74
75	/** Physical memory area used for klog buffer */	75	/** Physical memory area used for klog buffer */
76	static parea_t klog_parea;	76	static parea_t klog_parea;
77		77
78	static indev_operations_t stdin_ops = {	78	static indev_operations_t stdin_ops = {
79	.poll = NULL	79	.poll = NULL
80	};	80	};
81		81
82	/** Silence output */	82	/** Silence output */
83	bool silent = false;	83	bool silent = false;
84		84
85	/** Standard input and output character devices */	85	/** Standard input and output character devices */
86	indev_t *stdin = NULL;	86	indev_t *stdin = NULL;
87	outdev_t *stdout = NULL;	87	outdev_t *stdout = NULL;
88		88
89	indev_t *stdin_wire(void)	89	indev_t *stdin_wire(void)
90	{	90	{
91	if (stdin == NULL) {	91	if (stdin == NULL) {
92	stdin = malloc(sizeof(indev_t), FRAME_ATOMIC);	92	stdin = malloc(sizeof(indev_t), FRAME_ATOMIC);
93	if (stdin != NULL)	93	if (stdin != NULL)
94	indev_initialize("stdin", stdin, &stdin_ops);	94	indev_initialize("stdin", stdin, &stdin_ops);
95	}	95	}
96		96
97	return stdin;	97	return stdin;
98	}	98	}
99		99
100	/** Initialize kernel logging facility	100	/** Initialize kernel logging facility
101	*	101	*
102	* The shared area contains kernel cyclic buffer. Userspace application may	102	* The shared area contains kernel cyclic buffer. Userspace application may
103	* be notified on new data with indication of position and size	103	* be notified on new data with indication of position and size
104	* of the data within the circular buffer.	104	* of the data within the circular buffer.
105	*	105	*
106	*/	106	*/
107	void klog_init(void)	107	void klog_init(void)
108	{	108	{
109	void faddr = (void ) KA2PA(klog);	109	void faddr = (void ) KA2PA(klog);
110		110
111	ASSERT((uintptr_t) faddr % FRAME_SIZE == 0);	111	ASSERT((uintptr_t) faddr % FRAME_SIZE == 0);
112		112
113	klog_parea.pbase = (uintptr_t) faddr;	113	klog_parea.pbase = (uintptr_t) faddr;
114	klog_parea.frames = SIZE2FRAMES(sizeof(klog));	114	klog_parea.frames = SIZE2FRAMES(sizeof(klog));
115	ddi_parea_register(&klog_parea);	115	ddi_parea_register(&klog_parea);
116		116
117	sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr);	117	sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr);
118	sysinfo_set_item_val("klog.pages", NULL, KLOG_PAGES);	118	sysinfo_set_item_val("klog.pages", NULL, KLOG_PAGES);
119		119
120	spinlock_lock(&klog_lock);	120	spinlock_lock(&klog_lock);
121	klog_inited = true;	121	klog_inited = true;
122	spinlock_unlock(&klog_lock);	122	spinlock_unlock(&klog_lock);
123	}	123	}
124		124
125	void grab_console(void)	125	void grab_console(void)
126	{	126	{
127	silent = false;	127	silent = false;
128	arch_grab_console();	128	arch_grab_console();
-		129
-		130	/* Force the console to print the prompt */
-		131	if (stdin)
-		132	indev_push_character(stdin, '\n');
129	}	133	}
130		134
131	void release_console(void)	135	void release_console(void)
132	{	136	{
133	silent = true;	137	silent = true;
134	arch_release_console();	138	arch_release_console();
135	}	139	}
136		140
137	/** Tell kernel to get keyboard/console access again */	141	/** Tell kernel to get keyboard/console access again */
138	unative_t sys_debug_enable_console(void)	142	unative_t sys_debug_enable_console(void)
139	{	143	{
140	#ifdef CONFIG_KCONSOLE	144	#ifdef CONFIG_KCONSOLE
141	grab_console();	145	grab_console();
142	return true;	146	return true;
143	#else	147	#else
144	return false;	148	return false;
145	#endif	149	#endif
146	}	150	}
147		151
148	/** Tell kernel to relinquish keyboard/console access */	152	/** Tell kernel to relinquish keyboard/console access */
149	unative_t sys_debug_disable_console(void)	153	unative_t sys_debug_disable_console(void)
150	{	154	{
151	release_console();	155	release_console();
152	return true;	156	return true;
153	}	157	}
154		158
155	/** Get string from input character device.	159	/** Get string from input character device.
156	*	160	*
157	* Read characters from input character device until first occurrence	161	* Read characters from input character device until first occurrence
158	* of newline character.	162	* of newline character.
159	*	163	*
160	* @param indev Input character device.	164	* @param indev Input character device.
161	* @param buf Buffer where to store string terminated by NULL.	165	* @param buf Buffer where to store string terminated by NULL.
162	* @param buflen Size of the buffer.	166	* @param buflen Size of the buffer.
163	*	167	*
164	* @return Number of characters read.	168	* @return Number of characters read.
165	*	169	*
166	*/	170	*/
167	count_t gets(indev_t indev, char buf, size_t buflen)	171	count_t gets(indev_t indev, char buf, size_t buflen)
168	{	172	{
169	size_t offset = 0;	173	size_t offset = 0;
170	count_t count = 0;	174	count_t count = 0;
171	buf[offset] = 0;	175	buf[offset] = 0;
172		176
173	wchar_t ch;	177	wchar_t ch;
174	while ((ch = indev_pop_character(indev)) != '\n') {	178	while ((ch = indev_pop_character(indev)) != '\n') {
175	if (ch == '\b') {	179	if (ch == '\b') {
176	if (count > 0) {	180	if (count > 0) {
177	/* Space, backspace, space */	181	/* Space, backspace, space */
178	putchar('\b');	182	putchar('\b');
179	putchar(' ');	183	putchar(' ');
180	putchar('\b');	184	putchar('\b');
181		185
182	count--;	186	count--;
183	offset = str_lsize(buf, count);	187	offset = str_lsize(buf, count);
184	buf[offset] = 0;	188	buf[offset] = 0;
185	}	189	}
186	}	190	}
187	if (chr_encode(ch, buf, &offset, buflen - 1) == EOK) {	191	if (chr_encode(ch, buf, &offset, buflen - 1) == EOK) {
188	putchar(ch);	192	putchar(ch);
189	count++;	193	count++;
190	buf[offset] = 0;	194	buf[offset] = 0;
191	}	195	}
192	}	196	}
193		197
194	return count;	198	return count;
195	}	199	}
196		200
197	/** Get character from input device & echo it to screen */	201	/** Get character from input device & echo it to screen */
198	wchar_t getc(indev_t *indev)	202	wchar_t getc(indev_t *indev)
199	{	203	{
200	wchar_t ch = indev_pop_character(indev);	204	wchar_t ch = indev_pop_character(indev);
201	putchar(ch);	205	putchar(ch);
202	return ch;	206	return ch;
203	}	207	}
204		208
205	void klog_update(void)	209	void klog_update(void)
206	{	210	{
207	spinlock_lock(&klog_lock);	211	spinlock_lock(&klog_lock);
208		212
209	if ((klog_inited) && (event_is_subscribed(EVENT_KLOG)) && (klog_uspace > 0)) {	213	if ((klog_inited) && (event_is_subscribed(EVENT_KLOG)) && (klog_uspace > 0)) {
210	event_notify_3(EVENT_KLOG, klog_start, klog_len, klog_uspace);	214	event_notify_3(EVENT_KLOG, klog_start, klog_len, klog_uspace);
211	klog_uspace = 0;	215	klog_uspace = 0;
212	}	216	}
213		217
214	spinlock_unlock(&klog_lock);	218	spinlock_unlock(&klog_lock);
215	}	219	}
216		220
217	void putchar(const wchar_t ch)	221	void putchar(const wchar_t ch)
218	{	222	{
219	spinlock_lock(&klog_lock);	223	spinlock_lock(&klog_lock);
220		224
221	if ((klog_stored > 0) && (stdout) && (stdout->op->write)) {	225	if ((klog_stored > 0) && (stdout) && (stdout->op->write)) {
222	/* Print charaters stored in kernel log */	226	/* Print charaters stored in kernel log */
223	index_t i;	227	index_t i;
224	for (i = klog_len - klog_stored; i < klog_len; i++)	228	for (i = klog_len - klog_stored; i < klog_len; i++)
225	stdout->op->write(stdout, klog[(klog_start + i) % KLOG_LENGTH], silent);	229	stdout->op->write(stdout, klog[(klog_start + i) % KLOG_LENGTH], silent);
226	klog_stored = 0;	230	klog_stored = 0;
227	}	231	}
228		232
229	/* Store character in the cyclic kernel log */	233	/* Store character in the cyclic kernel log */
230	klog[(klog_start + klog_len) % KLOG_LENGTH] = ch;	234	klog[(klog_start + klog_len) % KLOG_LENGTH] = ch;
231	if (klog_len < KLOG_LENGTH)	235	if (klog_len < KLOG_LENGTH)
232	klog_len++;	236	klog_len++;
233	else	237	else
234	klog_start = (klog_start + 1) % KLOG_LENGTH;	238	klog_start = (klog_start + 1) % KLOG_LENGTH;
235		239
236	if ((stdout) && (stdout->op->write))	240	if ((stdout) && (stdout->op->write))
237	stdout->op->write(stdout, ch, silent);	241	stdout->op->write(stdout, ch, silent);
238	else {	242	else {
239	/* The character is just in the kernel log */	243	/* The character is just in the kernel log */
240	if (klog_stored < klog_len)	244	if (klog_stored < klog_len)
241	klog_stored++;	245	klog_stored++;
242	}	246	}
243		247
244	/* The character is stored for uspace */	248	/* The character is stored for uspace */
245	if (klog_uspace < klog_len)	249	if (klog_uspace < klog_len)
246	klog_uspace++;	250	klog_uspace++;
247		251
248	/* Check notify uspace to update */	252	/* Check notify uspace to update */
249	bool update;	253	bool update;
250	if ((klog_uspace > KLOG_LATENCY) \|\| (ch == '\n'))	254	if ((klog_uspace > KLOG_LATENCY) \|\| (ch == '\n'))
251	update = true;	255	update = true;
252	else	256	else
253	update = false;	257	update = false;
254		258
255	spinlock_unlock(&klog_lock);	259	spinlock_unlock(&klog_lock);
256		260
257	if (update)	261	if (update)
258	klog_update();	262	klog_update();
259	}	263	}
260		264
261	/** Print using kernel facility	265	/** Print using kernel facility
262	*	266	*
263	* Print to kernel log.	267	* Print to kernel log.
264	*	268	*
265	*/	269	*/
266	unative_t sys_klog(int fd, const void *buf, size_t size)	270	unative_t sys_klog(int fd, const void *buf, size_t size)
267	{	271	{
268	char *data;	272	char *data;
269	int rc;	273	int rc;
270		274
271	if (size > PAGE_SIZE)	275	if (size > PAGE_SIZE)
272	return ELIMIT;	276	return ELIMIT;
273		277
274	if (size > 0) {	278	if (size > 0) {
275	data = (char *) malloc(size + 1, 0);	279	data = (char *) malloc(size + 1, 0);
276	if (!data)	280	if (!data)
277	return ENOMEM;	281	return ENOMEM;
278		282
279	rc = copy_from_uspace(data, buf, size);	283	rc = copy_from_uspace(data, buf, size);
280	if (rc) {	284	if (rc) {
281	free(data);	285	free(data);
282	return rc;	286	return rc;
283	}	287	}
284	data[size] = 0;	288	data[size] = 0;
285		289
286	printf("%s", data);	290	printf("%s", data);
287	free(data);	291	free(data);
288	} else	292	} else
289	klog_update();	293	klog_update();
290		294
291	return size;	295	return size;
292	}	296	}
293		297
294	/** @}	298	/** @}
295	*/	299	*/
296		300

Subversion Repositories HelenOS

(root)/trunk/kernel/generic/src/console/console.c – Rev 4310 → 4318