WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/console/klog.c


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * 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 <mm/frame.h>
#include <sysinfo/sysinfo.h>
#include <console/klog.h>
#include <print.h>
#include <ipc/irq.h>
 
/* Order of frame to be allocated for klog communication */
#define KLOG_ORDER 0
 
static char *klog;
static int klogsize;
static int klogpos;
 
SPINLOCK_INITIALIZE(klog_lock);
 
/** Initialize kernel logging facility
 *
 * Allocate pages that are to be shared with uspace for console data.
 * The shared area is a circular 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;
 
    faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC));
    if (!faddr)
        panic("Cannot allocate page for klog");
    klog = (char *)PA2KA(faddr);
   
    sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr);
    sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);
 
    klogsize = PAGE_SIZE << KLOG_ORDER;
    klogpos = 0;
}
 
static void klog_vprintf(const char *fmt, va_list args)
{
    int ret;
    va_list atst;
 
    va_copy(atst, args);
    spinlock_lock(&klog_lock);
 
    ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);
    if (ret >= klogsize-klogpos) {
        klogpos = 0;
        if (ret >= klogsize)
            goto out;
    }
    ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret, 0);
    klogpos += ret;
    if (klogpos >= klogsize)
        klogpos = 0;
out:
    spinlock_unlock(&klog_lock);
    va_end(atst);
}
 
/** Printf a message to kernel-uspace log */
void klog_printf(const char *fmt, ...)
{
    va_list args;
   
    va_start(args, fmt);
   
    klog_vprintf(fmt, args);
 
    va_end(args);
}
 

Rev 1643	Rev 1693
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (C) 2006 Ondrej Palkovsky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <mm/frame.h>	29	#include <mm/frame.h>
30	#include <sysinfo/sysinfo.h>	30	#include <sysinfo/sysinfo.h>
31	#include <console/klog.h>	31	#include <console/klog.h>
32	#include <print.h>	32	#include <print.h>
33	#include <ipc/irq.h>	33	#include <ipc/irq.h>
34		34
35	/* Order of frame to be allocated for klog communication */	35	/* Order of frame to be allocated for klog communication */
36	#define KLOG_ORDER 0	36	#define KLOG_ORDER 0
37		37
38	static char *klog;	38	static char *klog;
39	static int klogsize;	39	static int klogsize;
40	static int klogpos;	40	static int klogpos;
41		41
42	SPINLOCK_INITIALIZE(klog_lock);	42	SPINLOCK_INITIALIZE(klog_lock);
43		43
44	/** Initialize kernel logging facility	44	/** Initialize kernel logging facility
45	*	45	*
46	* Allocate pages that are to be shared with uspace for console data.	46	* Allocate pages that are to be shared with uspace for console data.
47	* The shared area is a circular buffer. Userspace application may	47	* The shared area is a circular buffer. Userspace application may
48	* be notified on new data with indication of position and size	48	* be notified on new data with indication of position and size
49	* of the data within the circular buffer.	49	* of the data within the circular buffer.
50	*/	50	*/
51	void klog_init(void)	51	void klog_init(void)
52	{	52	{
53	void *faddr;	53	void *faddr;
54		54
55	faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC));	55	faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC));
56	if (!faddr)	56	if (!faddr)
57	panic("Cannot allocate page for klog");	57	panic("Cannot allocate page for klog");
58	klog = (char *)PA2KA(faddr);	58	klog = (char *)PA2KA(faddr);
59		59
60	sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr);	60	sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr);
61	sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);	61	sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);
62		62
63	klogsize = PAGE_SIZE << KLOG_ORDER;	63	klogsize = PAGE_SIZE << KLOG_ORDER;
64	klogpos = 0;	64	klogpos = 0;
65	}	65	}
66		66
67	static void klog_vprintf(const char *fmt, va_list args)	67	static void klog_vprintf(const char *fmt, va_list args)
68	{	68	{
69	int ret;	69	int ret;
70	va_list atst;	70	va_list atst;
71		71
72	va_copy(atst, args);	72	va_copy(atst, args);
73	spinlock_lock(&klog_lock);	73	spinlock_lock(&klog_lock);
74		74
75	ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);	75	ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);
76	if (ret >= klogsize-klogpos) {	76	if (ret >= klogsize-klogpos) {
77	klogpos = 0;	77	klogpos = 0;
78	if (ret >= klogsize)	78	if (ret >= klogsize)
79	goto out;	79	goto out;
80	}	80	}
81	ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret);	81	ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret, 0);
82	klogpos += ret;	82	klogpos += ret;
83	if (klogpos >= klogsize)	83	if (klogpos >= klogsize)
84	klogpos = 0;	84	klogpos = 0;
85	out:	85	out:
86	spinlock_unlock(&klog_lock);	86	spinlock_unlock(&klog_lock);
87	va_end(atst);	87	va_end(atst);
88	}	88	}
89		89
90	/** Printf a message to kernel-uspace log */	90	/** Printf a message to kernel-uspace log */
91	void klog_printf(const char *fmt, ...)	91	void klog_printf(const char *fmt, ...)
92	{	92	{
93	va_list args;	93	va_list args;
94		94
95	va_start(args, fmt);	95	va_start(args, fmt);
96		96
97	klog_vprintf(fmt, args);	97	klog_vprintf(fmt, args);
98		98
99	va_end(args);	99	va_end(args);
100	}	100	}
101		101

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/console/klog.c – Rev 1643 → 1693