1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374 |
- /*
- * 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 <http://www.gnu.org/licenses/>.
- */
- #include <grub/machine/memory.h>
- #include <grub/types.h>
- #include <grub/multiboot.h>
- #include <grub/err.h>
- #include <grub/misc.h>
- /* 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 (void)
- {
- 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, void *hook_data)
- {
- 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, hook_data))
- break;
- entry = (void *) ((grub_addr_t) entry + entry->size + sizeof (entry->size));
- }
- return 0;
- }
|