| /* |
| * |
| * 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> |
| |
| unsigned long loader_eax; /* The value of EAX passed from the loader */ |
| unsigned long loader_ebx; /* The value of EBX passed from the loader */ |
| |
| static int mb_add_memrange(struct sysinfo_t *info, unsigned long long base, |
| unsigned long long size, unsigned int type) |
| { |
| if (info->n_memranges >= SYSINFO_MAX_MEM_RANGES) |
| return -1; |
| |
| #if CONFIG(LP_MEMMAP_RAM_ONLY) |
| /* 1 == normal RAM. Ignore everything else for now */ |
| if (type != 1) |
| return 0; |
| #endif |
| |
| info->memrange[info->n_memranges].base = base; |
| info->memrange[info->n_memranges].size = size; |
| info->memrange[info->n_memranges].type = type; |
| info->n_memranges++; |
| |
| return 0; |
| } |
| |
| 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 (mb_add_memrange(info, mmap->addr, mmap->length, mmap->type)) |
| return; |
| |
| ptr += (mmap->size + sizeof(mmap->size)); |
| } |
| } |
| |
| static void mb_parse_meminfo(struct multiboot_header *table, |
| struct sysinfo_t *info) |
| { |
| unsigned long long mem_low = table->mem_lower; |
| unsigned long long mem_high = table->mem_higher; |
| |
| info->n_memranges = 0; |
| |
| if (mem_low) |
| mb_add_memrange(info, 0 * MiB, mem_low * KiB, 1); |
| |
| if (mem_high) |
| mb_add_memrange(info, 1 * MiB, mem_high * KiB, 1); |
| } |
| |
| 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); |
| else if (table->flags & MULTIBOOT_FLAGS_MEMINFO) |
| mb_parse_meminfo(table, info); |
| |
| if (table->flags & MULTIBOOT_FLAGS_CMDLINE) |
| mb_parse_cmdline(table); |
| |
| return 0; |
| } |