WebSVN – HelenOS – Diff – /branches/dynload/kernel/genarch/src/multiboot/multiboot.c


/*
 * Copyright (c) 2009 Jiri Svoboda
 * 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 genarch
 * @{
 */
/** @file
 */
 
#include <genarch/multiboot/multiboot.h>
#include <arch/types.h>
#include <typedefs.h>
#include <config.h>
#include <string.h>
#include <macros.h>
 
/** Extract command name from the multiboot module command line.
 *
 * @param buf      Destination buffer (will always null-terminate).
 * @param n        Size of destination buffer.
 * @param cmd_line Input string (the command line).
 *
 */
static void extract_command(char *buf, size_t n, const char *cmd_line)
{
    const char *start, *end, *cp;
    size_t max_len;
   
    /* Find the first space. */
    end = strchr(cmd_line, ' ');
    if (end == NULL)
        end = cmd_line + strlen(cmd_line);
   
    /*
     * Find last occurence of '/' before 'end'. If found, place start at
     * next character. Otherwise, place start at beginning of buffer.
     */
    cp = end;
    start = buf;
    while (cp != start) {
        if (*cp == '/') {
            start = cp + 1;
            break;
        }
        --cp;
    }
   
    /* Copy the command and null-terminate the string. */
    max_len = min(n - 1, (size_t) (end - start));
    strncpy(buf, start, max_len + 1);
    buf[max_len] = '\0';
}
 
/** Parse multiboot information structure.
 *
 * If @a signature does not contain a valid multiboot signature,
 * assumes no multiboot information is available.
 *
 * @param signature Should contain the multiboot signature.
 * @param mi        Pointer to the multiboot information structure.
 */
void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi)
{
    uint32_t flags;
    multiboot_mod_t *mods;
    uint32_t i;
   
    if (signature == MULTIBOOT_LOADER_MAGIC)
        flags = mi->flags;
    else {
        /* No multiboot info available. */
        flags = 0;
    }
   
    /* Copy module information. */
   
    if ((flags & MBINFO_FLAGS_MODS) != 0) {
        init.cnt = min(mi->mods_count, CONFIG_INIT_TASKS);
        mods = (multiboot_mod_t *) MULTIBOOT_PTR(mi->mods_addr);
       
        for (i = 0; i < init.cnt; i++) {
            init.tasks[i].addr = PA2KA(mods[i].start);
            init.tasks[i].size = mods[i].end - mods[i].start;
           
            /* Copy command line, if available. */
            if (mods[i].string) {
                extract_command(init.tasks[i].name,
                    CONFIG_TASK_NAME_BUFLEN,
                    MULTIBOOT_PTR(mods[i].string));
            } else
                init.tasks[i].name[0] = '\0';
        }
    } else
        init.cnt = 0;
   
    /* Copy memory map. */
   
    int32_t mmap_length;
    multiboot_mmap_t *mme;
    uint32_t size;
   
    if ((flags & MBINFO_FLAGS_MMAP) != 0) {
        mmap_length = mi->mmap_length;
        mme = MULTIBOOT_PTR(mi->mmap_addr);
        e820counter = 0;
       
        i = 0;
        while ((mmap_length > 0) && (i < MEMMAP_E820_MAX_RECORDS)) {
            e820table[i++] = mme->mm_info;
           
            /* Compute address of next structure. */
            size = sizeof(mme->size) + mme->size;
            mme = ((void *) mme) + size;
            mmap_length -= size;
        }
       
        e820counter = i;
    } else
        e820counter = 0;
}
 
/** @}
 */
 

Rev 4345	Rev 4347
1	/*	1	/*
2	* Copyright (c) 2009 Jiri Svoboda	2	* Copyright (c) 2009 Jiri Svoboda
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 genarch	29	/** @addtogroup genarch
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <genarch/multiboot/multiboot.h>	35	#include <genarch/multiboot/multiboot.h>
36	#include <arch/types.h>	36	#include <arch/types.h>
37	#include <typedefs.h>	37	#include <typedefs.h>
38	#include <config.h>	38	#include <config.h>
39	#include <string.h>	39	#include <string.h>
40	#include <macros.h>	40	#include <macros.h>
41		41
42	/** Extract command name from the multiboot module command line.	42	/** Extract command name from the multiboot module command line.
43	*	43	*
44	* @param buf Destination buffer (will always null-terminate).	44	* @param buf Destination buffer (will always null-terminate).
45	* @param n Size of destination buffer.	45	* @param n Size of destination buffer.
46	* @param cmd_line Input string (the command line).	46	* @param cmd_line Input string (the command line).
47	*	47	*
48	*/	48	*/
49	static void extract_command(char buf, size_t n, const char cmd_line)	49	static void extract_command(char buf, size_t n, const char cmd_line)
50	{	50	{
51	const char start, end, *cp;	51	const char start, end, *cp;
52	size_t max_len;	52	size_t max_len;
53		53
54	/* Find the first space. */	54	/* Find the first space. */
55	end = strchr(cmd_line, ' ');	55	end = strchr(cmd_line, ' ');
56	if (end == NULL)	56	if (end == NULL)
57	end = cmd_line + strlen(cmd_line);	57	end = cmd_line + strlen(cmd_line);
58		58
59	/*	59	/*
60	* Find last occurence of '/' before 'end'. If found, place start at	60	* Find last occurence of '/' before 'end'. If found, place start at
61	* next character. Otherwise, place start at beginning of buffer.	61	* next character. Otherwise, place start at beginning of buffer.
62	*/	62	*/
63	cp = end;	63	cp = end;
64	start = buf;	64	start = buf;
65	while (cp != start) {	65	while (cp != start) {
66	if (*cp == '/') {	66	if (*cp == '/') {
67	start = cp + 1;	67	start = cp + 1;
68	break;	68	break;
69	}	69	}
70	--cp;	70	--cp;
71	}	71	}
72		72
73	/* Copy the command and null-terminate the string. */	73	/* Copy the command and null-terminate the string. */
74	max_len = min(n - 1, (size_t) (end - start));	74	max_len = min(n - 1, (size_t) (end - start));
75	strncpy(buf, start, max_len + 1);	75	strncpy(buf, start, max_len + 1);
76	buf[max_len] = '\0';	76	buf[max_len] = '\0';
77	}	77	}
78		78
79	/** Parse multiboot information structure.	79	/** Parse multiboot information structure.
80	*	80	*
81	* If @a signature does not contain a valid multiboot signature,	81	* If @a signature does not contain a valid multiboot signature,
82	* assumes no multiboot information is available.	82	* assumes no multiboot information is available.
83	*	83	*
84	* @param signature Should contain the multiboot signature.	84	* @param signature Should contain the multiboot signature.
85	* @param mi Pointer to the multiboot information structure.	85	* @param mi Pointer to the multiboot information structure.
86	*/	86	*/
87	void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi)	87	void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi)
88	{	88	{
89	uint32_t flags;	89	uint32_t flags;
90	multiboot_mod_t *mods;	90	multiboot_mod_t *mods;
91	uint32_t i;	91	uint32_t i;
92		92
93	if (signature == MULTIBOOT_LOADER_MAGIC)	93	if (signature == MULTIBOOT_LOADER_MAGIC)
94	flags = mi->flags;	94	flags = mi->flags;
95	else {	95	else {
96	/* No multiboot info available. */	96	/* No multiboot info available. */
97	flags = 0;	97	flags = 0;
98	}	98	}
99		99
100	/* Copy module information. */	100	/* Copy module information. */
101		101
102	if ((flags & MBINFO_FLAGS_MODS) != 0) {	102	if ((flags & MBINFO_FLAGS_MODS) != 0) {
103	init.cnt = mi->mods_count;	103	init.cnt = min(mi->mods_count, CONFIG_INIT_TASKS);
104	mods = (multiboot_mod_t *) MULTIBOOT_PTR(mi->mods_addr);	104	mods = (multiboot_mod_t *) MULTIBOOT_PTR(mi->mods_addr);
105		105
106	for (i = 0; i < init.cnt; i++) {	106	for (i = 0; i < init.cnt; i++) {
107	init.tasks[i].addr = PA2KA(mods[i].start);	107	init.tasks[i].addr = PA2KA(mods[i].start);
108	init.tasks[i].size = mods[i].end - mods[i].start;	108	init.tasks[i].size = mods[i].end - mods[i].start;
109		109
110	/* Copy command line, if available. */	110	/* Copy command line, if available. */
111	if (mods[i].string) {	111	if (mods[i].string) {
112	extract_command(init.tasks[i].name,	112	extract_command(init.tasks[i].name,
113	CONFIG_TASK_NAME_BUFLEN,	113	CONFIG_TASK_NAME_BUFLEN,
114	MULTIBOOT_PTR(mods[i].string));	114	MULTIBOOT_PTR(mods[i].string));
115	} else	115	} else
116	init.tasks[i].name[0] = '\0';	116	init.tasks[i].name[0] = '\0';
117	}	117	}
118	} else	118	} else
119	init.cnt = 0;	119	init.cnt = 0;
120		120
121	/* Copy memory map. */	121	/* Copy memory map. */
122		122
123	int32_t mmap_length;	123	int32_t mmap_length;
124	multiboot_mmap_t *mme;	124	multiboot_mmap_t *mme;
125	uint32_t size;	125	uint32_t size;
126		126
127	if ((flags & MBINFO_FLAGS_MMAP) != 0) {	127	if ((flags & MBINFO_FLAGS_MMAP) != 0) {
128	mmap_length = mi->mmap_length;	128	mmap_length = mi->mmap_length;
129	mme = MULTIBOOT_PTR(mi->mmap_addr);	129	mme = MULTIBOOT_PTR(mi->mmap_addr);
130	e820counter = 0;	130	e820counter = 0;
131		131
132	i = 0;	132	i = 0;
133	while (mmap_length > 0) {	133	while ((mmap_length > 0) && (i < MEMMAP_E820_MAX_RECORDS)) {
134	e820table[i++] = mme->mm_info;	134	e820table[i++] = mme->mm_info;
135		135
136	/* Compute address of next structure. */	136	/* Compute address of next structure. */
137	size = sizeof(mme->size) + mme->size;	137	size = sizeof(mme->size) + mme->size;
138	mme = ((void *) mme) + size;	138	mme = ((void *) mme) + size;
139	mmap_length -= size;	139	mmap_length -= size;
140	}	140	}
141		141
142	e820counter = i;	142	e820counter = i;
143	} else	143	} else
144	e820counter = 0;	144	e820counter = 0;
145	}	145	}
146		146
147	/** @}	147	/** @}
148	*/	148	*/
149		149

Subversion Repositories HelenOS

(root)/branches/dynload/kernel/genarch/src/multiboot/multiboot.c – Rev 4345 → 4347