| 0,0 → 1,139 |
|---|
| /* |
| * 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 sz Size of destination buffer (in bytes). |
| * @param cmd_line Input string (the command line). |
| * |
| */ |
| static void extract_command(char *buf, size_t sz, const char *cmd_line) |
| { |
| /* Find the first space. */ |
| const char *end = str_chr(cmd_line, ' '); |
| if (end == NULL) |
| end = cmd_line + str_size(cmd_line); |
| |
| /* |
| * Find last occurence of '/' before 'end'. If found, place start at |
| * next character. Otherwise, place start at beginning of buffer. |
| */ |
| const char *cp = end; |
| const char *start = buf; |
| |
| while (cp != start) { |
| if (*cp == '/') { |
| start = cp + 1; |
| break; |
| } |
| cp--; |
| } |
| |
| /* Copy the command. */ |
| str_ncpy(buf, sz, start, (size_t) (end - start)); |
| } |
| |
| /** 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; |
| |
| if (signature == MULTIBOOT_LOADER_MAGIC) |
| flags = mi->flags; |
| else { |
| /* No multiboot info available. */ |
| flags = 0; |
| } |
| |
| /* Copy module information. */ |
| uint32_t i; |
| if ((flags & MBINFO_FLAGS_MODS) != 0) { |
| init.cnt = min(mi->mods_count, CONFIG_INIT_TASKS); |
| multiboot_mod_t *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. */ |
| |
| if ((flags & MBINFO_FLAGS_MMAP) != 0) { |
| int32_t mmap_length = mi->mmap_length; |
| multiboot_mmap_t *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. */ |
| uint32_t size = sizeof(mme->size) + mme->size; |
| mme = ((void *) mme) + size; |
| mmap_length -= size; |
| } |
| |
| e820counter = i; |
| } else |
| e820counter = 0; |
| } |
| |
| /** @} |
| */ |