/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc. * * GRUB is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * GRUB is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GRUB. If not, see . */ #include #include #include #include #include /* A pointer to the MBI in its initial location. */ struct multiboot_info *startup_multiboot_info; /* The MBI has to be copied to our BSS so that it won't be overwritten. This is its final location. */ static struct multiboot_info kern_multiboot_info; /* Unfortunately we can't use heap at this point. But 32 looks like a sane limit (used by memtest86). */ static grub_uint8_t mmap_entries[sizeof (struct multiboot_mmap_entry) * 32]; void grub_machine_mmap_init () { if (! startup_multiboot_info) grub_fatal ("Unable to find Multiboot Information (is CONFIG_MULTIBOOT disabled in coreboot?)"); /* Move MBI to a safe place. */ grub_memmove (&kern_multiboot_info, startup_multiboot_info, sizeof (struct multiboot_info)); if ((kern_multiboot_info.flags & MULTIBOOT_INFO_MEM_MAP) == 0) grub_fatal ("Missing Multiboot memory information"); /* Move the memory map to a safe place. */ if (kern_multiboot_info.mmap_length > sizeof (mmap_entries)) { grub_printf ("WARNING: Memory map size exceeds limit (0x%x > 0x%x); it will be truncated\n", kern_multiboot_info.mmap_length, sizeof (mmap_entries)); kern_multiboot_info.mmap_length = sizeof (mmap_entries); } grub_memmove (mmap_entries, (void *) kern_multiboot_info.mmap_addr, kern_multiboot_info.mmap_length); kern_multiboot_info.mmap_addr = (grub_uint32_t) mmap_entries; } grub_err_t grub_machine_mmap_iterate (grub_memory_hook_t hook) { struct multiboot_mmap_entry *entry = (void *) kern_multiboot_info.mmap_addr; while ((unsigned long) entry < kern_multiboot_info.mmap_addr + kern_multiboot_info.mmap_length) { if (hook (entry->addr, entry->len, entry->type)) break; entry = (void *) ((grub_addr_t) entry + entry->size + sizeof (entry->size)); } return 0; }