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.
 */
 
 /** @addtogroup genericklog
 
 
 * @{
 */
/** @file
 */
 
#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 1702	Rev 1705
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	/** @addtogroup genericklog KLog	29	/** @addtogroup genericklog
30	* @brief Kernel logging facility	-
31	* @ingroup kernel	-
32	* @{	30	* @{
33	*/	31	*/
34	/** @file	32	/** @file
35	*/	33	*/
36		34
37	#include <mm/frame.h>	35	#include <mm/frame.h>
38	#include <sysinfo/sysinfo.h>	36	#include <sysinfo/sysinfo.h>
39	#include <console/klog.h>	37	#include <console/klog.h>
40	#include <print.h>	38	#include <print.h>
41	#include <ipc/irq.h>	39	#include <ipc/irq.h>
42		40
43	/* Order of frame to be allocated for klog communication */	41	/* Order of frame to be allocated for klog communication */
44	#define KLOG_ORDER 0	42	#define KLOG_ORDER 0
45		43
46	static char *klog;	44	static char *klog;
47	static int klogsize;	45	static int klogsize;
48	static int klogpos;	46	static int klogpos;
49		47
50	SPINLOCK_INITIALIZE(klog_lock);	48	SPINLOCK_INITIALIZE(klog_lock);
51		49
52	/** Initialize kernel logging facility	50	/** Initialize kernel logging facility
53	*	51	*
54	* Allocate pages that are to be shared with uspace for console data.	52	* Allocate pages that are to be shared with uspace for console data.
55	* The shared area is a circular buffer. Userspace application may	53	* The shared area is a circular buffer. Userspace application may
56	* be notified on new data with indication of position and size	54	* be notified on new data with indication of position and size
57	* of the data within the circular buffer.	55	* of the data within the circular buffer.
58	*/	56	*/
59	void klog_init(void)	57	void klog_init(void)
60	{	58	{
61	void *faddr;	59	void *faddr;
62		60
63	faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC));	61	faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC));
64	if (!faddr)	62	if (!faddr)
65	panic("Cannot allocate page for klog");	63	panic("Cannot allocate page for klog");
66	klog = (char *)PA2KA(faddr);	64	klog = (char *)PA2KA(faddr);
67		65
68	sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr);	66	sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr);
69	sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);	67	sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);
70		68
71	klogsize = PAGE_SIZE << KLOG_ORDER;	69	klogsize = PAGE_SIZE << KLOG_ORDER;
72	klogpos = 0;	70	klogpos = 0;
73	}	71	}
74		72
75	static void klog_vprintf(const char *fmt, va_list args)	73	static void klog_vprintf(const char *fmt, va_list args)
76	{	74	{
77	int ret;	75	int ret;
78	va_list atst;	76	va_list atst;
79		77
80	va_copy(atst, args);	78	va_copy(atst, args);
81	spinlock_lock(&klog_lock);	79	spinlock_lock(&klog_lock);
82		80
83	ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);	81	ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);
84	if (ret >= klogsize-klogpos) {	82	if (ret >= klogsize-klogpos) {
85	klogpos = 0;	83	klogpos = 0;
86	if (ret >= klogsize)	84	if (ret >= klogsize)
87	goto out;	85	goto out;
88	}	86	}
89	ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret, 0);	87	ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret, 0);
90	klogpos += ret;	88	klogpos += ret;
91	if (klogpos >= klogsize)	89	if (klogpos >= klogsize)
92	klogpos = 0;	90	klogpos = 0;
93	out:	91	out:
94	spinlock_unlock(&klog_lock);	92	spinlock_unlock(&klog_lock);
95	va_end(atst);	93	va_end(atst);
96	}	94	}
97		95
98	/** Printf a message to kernel-uspace log */	96	/** Printf a message to kernel-uspace log */
99	void klog_printf(const char *fmt, ...)	97	void klog_printf(const char *fmt, ...)
100	{	98	{
101	va_list args;	99	va_list args;
102		100
103	va_start(args, fmt);	101	va_start(args, fmt);
104		102
105	klog_vprintf(fmt, args);	103	klog_vprintf(fmt, args);
106		104
107	va_end(args);	105	va_end(args);
108	}	106	}
109		107
110	/** @}	108	/** @}
111	*/	109	*/
112		110
113		111

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/console/klog.c – Rev 1702 → 1705