source: trunk/kernel/arch/ibmpc/kdmsg.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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1/*
2 * kdmsg.c - output kernel debug/trace/information to an available terminal
3 * (see kern/kdmsg.h)
4 *
5 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
6 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-kernel.
9 *
10 * ALMOS-kernel is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-kernel is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <types.h>
25#include <hardware.h>
26#include <cpu.h>
27#include <device.h>
28#include <tty.h>
29#include <libk.h>
30#include <kdmsg.h>
31#include <spinlock.h>
32
33spinlock_t exception_lock;
34spinlock_t printk_lock;
35spinlock_t isr_lock;
36
37void kdmsg_init()
38{
39        spinlock_init(&exception_lock);
40        spinlock_init(&printk_lock);
41        spinlock_init(&isr_lock);
42}
43
44int __fprintk (int tty, spinlock_t *lock, const char *fmt, ...)
45{
46        va_list ap;
47        int count;
48        char buff[256];
49        dev_request_t rq;
50
51        va_start (ap, fmt);
52
53        assert(tty == 0 && "Unexpected tty device id");
54        count = iprintk (buff, 1, (char *) fmt, ap);
55        assert(count < 256 && "Buffer overflow");
56
57        va_end (ap);
58        rq.src   = buff;
59        rq.count = count;
60        rq.flags = DEV_RQ_NOBLOCK;
61
62        if(lock)
63        {
64                if(lock == &printk_lock)
65                        spinlock_lock(&ttys_tbl[tty].lock);
66                else
67                        cpu_spinlock_lock(&ttys_tbl[tty].lock.val);
68        }
69
70        ttys_tbl[tty].op.dev.write(&ttys_tbl[tty], &rq);
71   
72        if(lock)
73        {
74                if(lock == &printk_lock)
75                        spinlock_unlock(&ttys_tbl[tty].lock);
76                else
77                        cpu_spinlock_unlock(&ttys_tbl[tty].lock.val);
78        }
79
80        return count;
81}
82
83int __perror (int fatal, const char *fmt, ...)
84{
85        va_list ap;
86        int count;
87        char buff[256];
88        dev_request_t rq;
89
90        va_start (ap, fmt);
91        count = iprintk (buff, 1, (char *) fmt, ap);
92        va_end (ap);
93   
94        rq.src = buff;
95        rq.count = count;
96        rq.flags = DEV_RQ_NOBLOCK;
97
98        ttys_tbl[0].op.dev.write(&ttys_tbl[0], &rq);
99
100        if(fatal)
101                while(1);
102
103        return count;
104}
105
106void bdump(uint_t fd, char* buff, size_t count)
107{
108        register uint_t i,j,size;
109        char *tab = "0123456789ABCDEF";
110        char tmp[256];
111        dev_request_t rq;
112     
113        assert((fd != 0) && "file descriptor is not a tty");
114        i=0;
115
116        while(count)
117        {
118                size = (count < 256) ? count : 256;
119   
120                for(j=0; j < size; j++, i++)
121                        tmp[j] = tab[ (buff[i] & 0xF)];
122               
123                rq.src   = tmp;
124                rq.count = 256;
125                rq.flags = 0;
126   
127                ttys_tbl[0].op.dev.write(&ttys_tbl[0], &rq);
128
129                count -= size;
130        }
131}
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