0,0 → 1,148 |
/* |
* 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 = mi->mods_count; |
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) { |
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; |
} |
|
/** @} |
*/ |
Property changes: |
Added: svn:mergeinfo |