/* * This file is part of the libpayload project. * * Copyright (C) 2008 Advanced Micro Devices, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. */ #include <libpayload-config.h> #include <libpayload.h> #include <multiboot_tables.h> extern unsigned long loader_eax; extern unsigned long loader_ebx; static void mb_parse_mmap(struct multiboot_header *table, struct sysinfo_t *info) { u8 *start = (u8 *) phys_to_virt(table->mmap_addr); u8 *ptr = start; info->n_memranges = 0; while(ptr < (start + table->mmap_length)) { struct multiboot_mmap *mmap = (struct multiboot_mmap *) ptr; #if IS_ENABLED(CONFIG_LP_MEMMAP_RAM_ONLY) /* 1 == normal RAM. Ignore everything else for now */ if (mmap->type == 1) { #endif info->memrange[info->n_memranges].base = mmap->addr; info->memrange[info->n_memranges].size = mmap->length; info->memrange[info->n_memranges].type = mmap->type; if (++info->n_memranges == SYSINFO_MAX_MEM_RANGES) return; #if IS_ENABLED(CONFIG_LP_MEMMAP_RAM_ONLY) } #endif ptr += (mmap->size + sizeof(mmap->size)); } } static void mb_parse_cmdline(struct multiboot_header *table) { extern int main_argc; extern char *main_argv[]; char *c = phys_to_virt(table->cmdline); while(*c != '\0' && main_argc < MAX_ARGC_COUNT) { main_argv[main_argc++] = c; for( ; *c != '\0' && !isspace(*c); c++); if (*c) { *c = 0; c++; } } } int get_multiboot_info(struct sysinfo_t *info) { struct multiboot_header *table; if (loader_eax != MULTIBOOT_MAGIC) return -1; table = (struct multiboot_header *) phys_to_virt(loader_ebx); info->mbtable = phys_to_virt(loader_ebx); if (table->flags & MULTIBOOT_FLAGS_MMAP) mb_parse_mmap(table, info); if (table->flags & MULTIBOOT_FLAGS_CMDLINE) mb_parse_cmdline(table); return 0; }