WebSVN – HelenOS-historic – Diff – /kernel/trunk/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.
 */
 
#include <console/console.h>
#include <console/chardev.h>
#include <synch/waitq.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <typedefs.h>
#include <arch.h>
#include <func.h>
#include <print.h>
#include <arch/atomic.h>
 
/** Standard input character device. */
chardev_t *stdin = NULL;
chardev_t *stdout = NULL;
 
/** Get character from character device. Do not echo character.
 *
 * @param chardev Character device.
 *
 * @return Character read.
 */
__u8 _getc(chardev_t *chardev)
{
    __u8 ch;
    ipl_t ipl;
 
    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 (chardev->op->read)
            return chardev->op->read(chardev);
        /* no other way of interacting with user, halt */
        if (CPU)
            printf("cpu%d: ", CPU->id);
        else
            printf("cpu: ");
        printf("halted - no kconsole\n");
        cpu_halt();
    }
 
    waitq_sleep(&chardev->wq);
    ipl = interrupts_disable();
    spinlock_lock(&chardev->lock);
    ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
    chardev->counter--;
    spinlock_unlock(&chardev->lock);
    interrupts_restore(ipl);
 
    chardev->op->resume(chardev);
 
    return ch;
}
 
/** Get string from character device.
 *
 * Read characters from character device until first occurrence
 * of newline character.
 *
 * @param chardev Character device.
 * @param buf Buffer where to store string terminated by '\0'.
 * @param len Size of the buffer.
 *
 * @return Number of characters read.
 */
count_t gets(chardev_t *chardev, char *buf, size_t buflen)
{
    index_t index = 0;
    char ch;
 
    while (index < buflen) {
        ch = _getc(chardev);
        if (ch == '\b') {
            if (index > 0) {
                index--;
                /* Space backspace, space */
                putchar('\b');
                putchar(' ');
                putchar('\b');
            }
            continue;
        }
        putchar(ch);
 
        if (ch == '\n') { /* end of string => write 0, return */
            buf[index] = '\0';
            return (count_t) index;
        }
        buf[index++] = ch;
    }
    return (count_t) index;
}
 
/** Get character from device & echo it to screen */
__u8 getc(chardev_t *chardev)
{
    __u8 ch;
 
    ch = _getc(chardev);
    putchar(ch);
    return ch;
}
 
void putchar(char c)
{
    if (stdout->op->write)
        stdout->op->write(stdout, c);
}
 

Rev 607	Rev 631
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	#include <console/console.h>	30	#include <console/console.h>
31	#include <console/chardev.h>	31	#include <console/chardev.h>
32	#include <synch/waitq.h>	32	#include <synch/waitq.h>
33	#include <synch/spinlock.h>	33	#include <synch/spinlock.h>
34	#include <arch/types.h>	34	#include <arch/types.h>
35	#include <typedefs.h>	35	#include <typedefs.h>
36	#include <arch.h>	36	#include <arch.h>
37	#include <func.h>	37	#include <func.h>
38	#include <print.h>	38	#include <print.h>
-		39	#include <arch/atomic.h>
39		40
40	/** Standard input character device. */	41	/** Standard input character device. */
41	chardev_t *stdin = NULL;	42	chardev_t *stdin = NULL;
42	chardev_t *stdout = NULL;	43	chardev_t *stdout = NULL;
43		44
44	/** Get character from character device. Do not echo character.	45	/** Get character from character device. Do not echo character.
45	*	46	*
46	* @param chardev Character device.	47	* @param chardev Character device.
47	*	48	*
48	* @return Character read.	49	* @return Character read.
49	*/	50	*/
50	__u8 _getc(chardev_t *chardev)	51	__u8 _getc(chardev_t *chardev)
51	{	52	{
52	__u8 ch;	53	__u8 ch;
53	ipl_t ipl;	54	ipl_t ipl;
54		55
55	if (haltstate) {	56	if (atomic_get(&haltstate)) {
56	/* If we are here, we are hopefully on the processor, that	57	/* If we are here, we are hopefully on the processor, that
57	* issued the 'halt' command, so proceed to read the character	58	* issued the 'halt' command, so proceed to read the character
58	* directly from input	59	* directly from input
59	*/	60	*/
60	if (chardev->op->read)	61	if (chardev->op->read)
61	return chardev->op->read(chardev);	62	return chardev->op->read(chardev);
62	/* no other way of interacting with user, halt */	63	/* no other way of interacting with user, halt */
-		64	if (CPU)
-		65	printf("cpu%d: ", CPU->id);
-		66	else
-		67	printf("cpu: ");
63	printf("cpu: halted - no kconsole\n");	68	printf("halted - no kconsole\n");
64	cpu_halt();	69	cpu_halt();
65	}	70	}
66		71
67	waitq_sleep(&chardev->wq);	72	waitq_sleep(&chardev->wq);
68	ipl = interrupts_disable();	73	ipl = interrupts_disable();
69	spinlock_lock(&chardev->lock);	74	spinlock_lock(&chardev->lock);
70	ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];	75	ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
71	chardev->counter--;	76	chardev->counter--;
72	spinlock_unlock(&chardev->lock);	77	spinlock_unlock(&chardev->lock);
73	interrupts_restore(ipl);	78	interrupts_restore(ipl);
74		79
75	chardev->op->resume(chardev);	80	chardev->op->resume(chardev);
76		81
77	return ch;	82	return ch;
78	}	83	}
79		84
80	/** Get string from character device.	85	/** Get string from character device.
81	*	86	*
82	* Read characters from character device until first occurrence	87	* Read characters from character device until first occurrence
83	* of newline character.	88	* of newline character.
84	*	89	*
85	* @param chardev Character device.	90	* @param chardev Character device.
86	* @param buf Buffer where to store string terminated by '\0'.	91	* @param buf Buffer where to store string terminated by '\0'.
87	* @param len Size of the buffer.	92	* @param len Size of the buffer.
88	*	93	*
89	* @return Number of characters read.	94	* @return Number of characters read.
90	*/	95	*/
91	count_t gets(chardev_t chardev, char buf, size_t buflen)	96	count_t gets(chardev_t chardev, char buf, size_t buflen)
92	{	97	{
93	index_t index = 0;	98	index_t index = 0;
94	char ch;	99	char ch;
95		100
96	while (index < buflen) {	101	while (index < buflen) {
97	ch = _getc(chardev);	102	ch = _getc(chardev);
98	if (ch == '\b') {	103	if (ch == '\b') {
99	if (index > 0) {	104	if (index > 0) {
100	index--;	105	index--;
101	/* Space backspace, space */	106	/* Space backspace, space */
102	putchar('\b');	107	putchar('\b');
103	putchar(' ');	108	putchar(' ');
104	putchar('\b');	109	putchar('\b');
105	}	110	}
106	continue;	111	continue;
107	}	112	}
108	putchar(ch);	113	putchar(ch);
109		114
110	if (ch == '\n') { /* end of string => write 0, return */	115	if (ch == '\n') { /* end of string => write 0, return */
111	buf[index] = '\0';	116	buf[index] = '\0';
112	return (count_t) index;	117	return (count_t) index;
113	}	118	}
114	buf[index++] = ch;	119	buf[index++] = ch;
115	}	120	}
116	return (count_t) index;	121	return (count_t) index;
117	}	122	}
118		123
119	/** Get character from device & echo it to screen */	124	/** Get character from device & echo it to screen */
120	__u8 getc(chardev_t *chardev)	125	__u8 getc(chardev_t *chardev)
121	{	126	{
122	__u8 ch;	127	__u8 ch;
123		128
124	ch = _getc(chardev);	129	ch = _getc(chardev);
125	putchar(ch);	130	putchar(ch);
126	return ch;	131	return ch;
127	}	132	}
128		133
129	void putchar(char c)	134	void putchar(char c)
130	{	135	{
131	if (stdout->op->write)	136	if (stdout->op->write)
132	stdout->op->write(stdout, c);	137	stdout->op->write(stdout, c);
133	}	138	}
134		139

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/console/console.c – Rev 607 → 631