/*
* 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 ia32
* @{
*/
/** @file
*/
#include <main/main.h>
#include <arch/boot/boot.h>
#include <arch/boot/cboot.h>
#include <arch/boot/memmap.h>
#include <config.h>
#include <memstr.h>
#include <string.h>
#include <macros.h>
/* This is a symbol so the type is only dummy. Obtain the value using &. */
extern int _hardcoded_unmapped_size;
/** 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. */
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));
buf[max_len] = '\0';
}
/** C part of ia32 boot sequence.
* @param signature Should contain the multiboot signature.
* @param mi Pointer to the multiboot information structure.
*/
void ia32_cboot(uint32_t signature, const mb_info_t *mi)
{
uint32_t flags;
mb_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 = mi->mods_addr;
for (i = 0; i < init.cnt; i++) {
init.tasks[i].addr = mods[i].start + 0x80000000;
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,
mods[i].string);
} else {
init.tasks[i].name[0] = '\0';
}
}
} else {
init.cnt = 0;
}
/* Copy memory map. */
int32_t mmap_length;
mb_mmap_t *mme;
uint32_t size;
if ((flags & MBINFO_FLAGS_MMAP) != 0) {
mmap_length = mi->mmap_length;
mme = 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;
}
#ifdef CONFIG_SMP
/* Copy AP bootstrap routines below 1 MB. */
memcpy((void *) AP_BOOT_OFFSET
, (void *) BOOT_OFFSET
,
(size_t) &_hardcoded_unmapped_size);
#endif
main_bsp();
}
/** @}
*/