WebSVN – HelenOS – Diff – /trunk/kernel/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 <ddi/device.h>
#include <ddi/irq.h>
#include <ipc/irq.h>
 
/*
 * For now, we use 0 as INR.
 * However, on some architectures 0 is the clock interrupt (e.g. amd64 and ia32).
 * It is therefore desirable to have architecture specific definition of KLOG_VIRT_INR
 * in the future.
 */
#define KLOG_VIRT_INR   0
 
/* 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);
 
static irq_t klog_irq;
 
static irq_ownership_t klog_claim(void);
 
/** 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 = frame_alloc(KLOG_ORDER, FRAME_ATOMIC);
    if (!faddr)
        panic("Cannot allocate page for klog");
    klog = (char *)PA2KA(faddr);
   
    devno_t devno = device_assign_devno();
   
    sysinfo_set_item_val("klog.faddr", NULL, (unative_t)faddr);
    sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);
    sysinfo_set_item_val("klog.devno", NULL, devno);
    sysinfo_set_item_val("klog.inr", NULL, KLOG_VIRT_INR);
 
    irq_initialize(&klog_irq);
    klog_irq.devno = devno;
    klog_irq.inr = KLOG_VIRT_INR;
    klog_irq.claim = klog_claim;
    irq_register(&klog_irq);
 
    klogsize = PAGE_SIZE << KLOG_ORDER;
    klogpos = 0;
}
 
/** Allways refuse IRQ ownership.
 *
 * This is not a real IRQ, so we always decline.
 *
 * @return Always returns IRQ_DECLINE.
 */
irq_ownership_t klog_claim(void)
{
    return IRQ_DECLINE;
}
 
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(&klog_irq, 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 1923	Rev 1924
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	29	/** @addtogroup genericklog
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <mm/frame.h>	35	#include <mm/frame.h>
36	#include <sysinfo/sysinfo.h>	36	#include <sysinfo/sysinfo.h>
37	#include <console/klog.h>	37	#include <console/klog.h>
38	#include <print.h>	38	#include <print.h>
39	#include <ddi/device.h>	39	#include <ddi/device.h>
40	#include <ddi/irq.h>	40	#include <ddi/irq.h>
41	#include <ipc/irq.h>	41	#include <ipc/irq.h>
42		42
-		43	/*
-		44	* For now, we use 0 as INR.
-		45	* However, on some architectures 0 is the clock interrupt (e.g. amd64 and ia32).
-		46	* It is therefore desirable to have architecture specific definition of KLOG_VIRT_INR
-		47	* in the future.
-		48	*/
-		49	#define KLOG_VIRT_INR 0
-		50
43	/* Order of frame to be allocated for klog communication */	51	/* Order of frame to be allocated for klog communication */
44	#define KLOG_ORDER 0	52	#define KLOG_ORDER 0
45		53
46	static char *klog;	54	static char *klog;
47	static int klogsize;	55	static int klogsize;
48	static int klogpos;	56	static int klogpos;
49		57
50	SPINLOCK_INITIALIZE(klog_lock);	58	SPINLOCK_INITIALIZE(klog_lock);
51		59
52	static irq_t klog_irq;	60	static irq_t klog_irq;
53		61
54	static irq_ownership_t klog_claim(void);	62	static irq_ownership_t klog_claim(void);
55		63
56	/** Initialize kernel logging facility	64	/** Initialize kernel logging facility
57	*	65	*
58	* Allocate pages that are to be shared with uspace for console data.	66	* Allocate pages that are to be shared with uspace for console data.
59	* The shared area is a circular buffer. Userspace application may	67	* The shared area is a circular buffer. Userspace application may
60	* be notified on new data with indication of position and size	68	* be notified on new data with indication of position and size
61	* of the data within the circular buffer.	69	* of the data within the circular buffer.
62	*/	70	*/
63	void klog_init(void)	71	void klog_init(void)
64	{	72	{
65	void *faddr;	73	void *faddr;
66		74
67	faddr = frame_alloc(KLOG_ORDER, FRAME_ATOMIC);	75	faddr = frame_alloc(KLOG_ORDER, FRAME_ATOMIC);
68	if (!faddr)	76	if (!faddr)
69	panic("Cannot allocate page for klog");	77	panic("Cannot allocate page for klog");
70	klog = (char *)PA2KA(faddr);	78	klog = (char *)PA2KA(faddr);
71		79
72	devno_t devno = device_assign_devno();	80	devno_t devno = device_assign_devno();
73		81
74	sysinfo_set_item_val("klog.faddr", NULL, (unative_t)faddr);	82	sysinfo_set_item_val("klog.faddr", NULL, (unative_t)faddr);
75	sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);	83	sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);
76	sysinfo_set_item_val("klog.devno", NULL, devno);	84	sysinfo_set_item_val("klog.devno", NULL, devno);
77	sysinfo_set_item_val("klog.inr", NULL, VIRT_INR_KLOG);	85	sysinfo_set_item_val("klog.inr", NULL, KLOG_VIRT_INR);
78		86
79	irq_initialize(&klog_irq);	87	irq_initialize(&klog_irq);
80	klog_irq.devno = devno;	88	klog_irq.devno = devno;
81	klog_irq.inr = VIRT_INR_KLOG;	89	klog_irq.inr = KLOG_VIRT_INR;
82	klog_irq.claim = klog_claim;	90	klog_irq.claim = klog_claim;
83	irq_register(&klog_irq);	91	irq_register(&klog_irq);
84		92
85	klogsize = PAGE_SIZE << KLOG_ORDER;	93	klogsize = PAGE_SIZE << KLOG_ORDER;
86	klogpos = 0;	94	klogpos = 0;
87	}	95	}
88		96
89	/** Allways refuse IRQ ownership.	97	/** Allways refuse IRQ ownership.
90	*	98	*
91	* This is not a real IRQ, so we always decline.	99	* This is not a real IRQ, so we always decline.
92	*	100	*
93	* @return Always returns IRQ_DECLINE.	101	* @return Always returns IRQ_DECLINE.
94	*/	102	*/
95	irq_ownership_t klog_claim(void)	103	irq_ownership_t klog_claim(void)
96	{	104	{
97	return IRQ_DECLINE;	105	return IRQ_DECLINE;
98	}	106	}
99		107
100	static void klog_vprintf(const char *fmt, va_list args)	108	static void klog_vprintf(const char *fmt, va_list args)
101	{	109	{
102	int ret;	110	int ret;
103	va_list atst;	111	va_list atst;
104		112
105	va_copy(atst, args);	113	va_copy(atst, args);
106	spinlock_lock(&klog_lock);	114	spinlock_lock(&klog_lock);
107		115
108	ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);	116	ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);
109	if (ret >= klogsize-klogpos) {	117	if (ret >= klogsize-klogpos) {
110	klogpos = 0;	118	klogpos = 0;
111	if (ret >= klogsize)	119	if (ret >= klogsize)
112	goto out;	120	goto out;
113	}	121	}
114	ipc_irq_send_msg(&klog_irq, klogpos, ret, 0);	122	ipc_irq_send_msg(&klog_irq, klogpos, ret, 0);
115	klogpos += ret;	123	klogpos += ret;
116	if (klogpos >= klogsize)	124	if (klogpos >= klogsize)
117	klogpos = 0;	125	klogpos = 0;
118	out:	126	out:
119	spinlock_unlock(&klog_lock);	127	spinlock_unlock(&klog_lock);
120	va_end(atst);	128	va_end(atst);
121	}	129	}
122		130
123	/** Printf a message to kernel-uspace log */	131	/** Printf a message to kernel-uspace log */
124	void klog_printf(const char *fmt, ...)	132	void klog_printf(const char *fmt, ...)
125	{	133	{
126	va_list args;	134	va_list args;
127		135
128	va_start(args, fmt);	136	va_start(args, fmt);
129		137
130	klog_vprintf(fmt, args);	138	klog_vprintf(fmt, args);
131		139
132	va_end(args);	140	va_end(args);
133	}	141	}
134		142
135	/** @}	143	/** @}
136	*/	144	*/
137		145

Subversion Repositories HelenOS

(root)/trunk/kernel/generic/src/console/klog.c – Rev 1923 → 1924