WebSVN – HelenOS – Diff – /trunk/kernel/arch/xen32/src/drivers/xconsole.c


/*
 * Copyright (C) 2006 Martin Decky
 * 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 xen32
 * @{
 */
/**
 * @file
 * @brief Xen32 console driver.
 */
 
#include <arch/drivers/xconsole.h>
#include <putchar.h>
#include <console/chardev.h>
#include <console/console.h>
#include <arch/hypercall.h>
 
 
#define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1))
 
 
 
 
 
 
 
 
 
 
static bool asynchronous = false;
static void xen_putchar(chardev_t *d, const char ch);
 
chardev_t xen_console;
static chardev_operations_t xen_ops = {
    .write = xen_putchar
};
 
void xen_console_init(void)
{
    chardev_initialize("xen_out", &xen_console, &xen_ops);
    stdout = &xen_console;
    if (!(start_info.flags & SIF_INITDOMAIN))
        asynchronous = true;
}
 
void xen_putchar(chardev_t *d, const char ch)
{
    if (asynchronous) {
 
        uint32_t cons = console_page.out_cons;
        uint32_t prod = console_page.out_prod;
       
        memory_barrier();
       
        if ((prod - cons) > sizeof(console_page.out))
            return;
       
        if (ch == '\n')
            console_page.out[MASK_INDEX(prod++, console_page.out)] = '\r';
        console_page.out[MASK_INDEX(prod++, console_page.out)] = ch;
       
        write_barrier();
       
        console_page.out_prod = prod;
       
        xen_notify_remote(start_info.console_evtchn);
    } else
        xen_console_io(CONSOLE_IO_WRITE, 1, &ch);
}
 
/** @}
 */
 

Rev 1831	Rev 1832
1	/*	1	/*
2	* Copyright (C) 2006 Martin Decky	2	* Copyright (C) 2006 Martin Decky
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 xen32	29	/** @addtogroup xen32
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief Xen32 console driver.	34	* @brief Xen32 console driver.
35	*/	35	*/
36		36
37	#include <arch/drivers/xconsole.h>	37	#include <arch/drivers/xconsole.h>
38	#include <putchar.h>	38	#include <putchar.h>
39	#include <console/chardev.h>	39	#include <console/chardev.h>
40	#include <console/console.h>	40	#include <console/console.h>
41	#include <arch/hypercall.h>	41	#include <arch/hypercall.h>
42	#include <mm/frame.h>	-
43		42
44	#define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1))	43	#define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1))
45		44
46	typedef struct {	-
47	char in[1024];	-
48	char out[2048];	-
49	uint32_t in_cons;	-
50	uint32_t in_prod;	-
51	uint32_t out_cons;	-
52	uint32_t out_prod;	-
53	} xencons_t;	-
54		-
55	static bool asynchronous = false;	45	static bool asynchronous = false;
56	static void xen_putchar(chardev_t *d, const char ch);	46	static void xen_putchar(chardev_t *d, const char ch);
57		47
58	chardev_t xen_console;	48	chardev_t xen_console;
59	static chardev_operations_t xen_ops = {	49	static chardev_operations_t xen_ops = {
60	.write = xen_putchar	50	.write = xen_putchar
61	};	51	};
62		52
63	void xen_console_init(void)	53	void xen_console_init(void)
64	{	54	{
65	chardev_initialize("xen_out", &xen_console, &xen_ops);	55	chardev_initialize("xen_out", &xen_console, &xen_ops);
66	stdout = &xen_console;	56	stdout = &xen_console;
67	if (!(start_info.flags & SIF_INITDOMAIN))	57	if (!(start_info.flags & SIF_INITDOMAIN))
68	asynchronous = true;	58	asynchronous = true;
69	}	59	}
70		60
71	void xen_putchar(chardev_t *d, const char ch)	61	void xen_putchar(chardev_t *d, const char ch)
72	{	62	{
73	if (asynchronous) {	63	if (asynchronous) {
74	xencons_t console = (xencons_t ) PA2KA(MA2PA(PFN2ADDR(start_info.console_mfn)));	-
75	uint32_t cons = console->out_cons;	64	uint32_t cons = console_page.out_cons;
76	uint32_t prod = console->out_prod;	65	uint32_t prod = console_page.out_prod;
77		66
78	memory_barrier();	67	memory_barrier();
79		68
80	if ((prod - cons) > sizeof(console->out))	69	if ((prod - cons) > sizeof(console_page.out))
81	return;	70	return;
82		71
83	if (ch == '\n')	72	if (ch == '\n')
84	console->out[MASK_INDEX(prod++, console->out)] = '\r';	73	console_page.out[MASK_INDEX(prod++, console_page.out)] = '\r';
85	console->out[MASK_INDEX(prod++, console->out)] = ch;	74	console_page.out[MASK_INDEX(prod++, console_page.out)] = ch;
86		75
87	write_barrier();	76	write_barrier();
88		77
89	console->out_prod = prod;	78	console_page.out_prod = prod;
90		79
91	xen_notify_remote(start_info.console_evtchn);	80	xen_notify_remote(start_info.console_evtchn);
92	} else	81	} else
93	xen_console_io(CONSOLE_IO_WRITE, 1, &ch);	82	xen_console_io(CONSOLE_IO_WRITE, 1, &ch);
94	}	83	}
95		84
96	/** @}	85	/** @}
97	*/	86	*/
98		87

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/xen32/src/drivers/xconsole.c – Rev 1831 → 1832