129 lines
4 KiB
C
129 lines
4 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2007,2008 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/machine/lbio.h>
|
|
#include <grub/types.h>
|
|
#include <grub/err.h>
|
|
#include <grub/misc.h>
|
|
|
|
/* Helper for grub_linuxbios_table_iterate. */
|
|
static int
|
|
check_signature (grub_linuxbios_table_header_t tbl_header)
|
|
{
|
|
if (! grub_memcmp (tbl_header->signature, "LBIO", 4))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
grub_err_t
|
|
grub_linuxbios_table_iterate (int (*hook) (grub_linuxbios_table_item_t,
|
|
void *),
|
|
void *hook_data)
|
|
{
|
|
grub_linuxbios_table_header_t table_header;
|
|
grub_linuxbios_table_item_t table_item;
|
|
|
|
/* Assuming table_header is aligned to its size (8 bytes). */
|
|
|
|
for (table_header = (grub_linuxbios_table_header_t) 0x500;
|
|
table_header < (grub_linuxbios_table_header_t) 0x1000; table_header++)
|
|
if (check_signature (table_header))
|
|
goto signature_found;
|
|
|
|
for (table_header = (grub_linuxbios_table_header_t) 0xf0000;
|
|
table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++)
|
|
if (check_signature (table_header))
|
|
goto signature_found;
|
|
|
|
grub_fatal ("Could not find coreboot table\n");
|
|
|
|
signature_found:
|
|
|
|
table_item =
|
|
(grub_linuxbios_table_item_t) ((long) table_header +
|
|
(long) table_header->header_size);
|
|
for (; table_item < (grub_linuxbios_table_item_t) ((long) table_header
|
|
+ (long) table_header->header_size
|
|
+ (long) table_header->table_size);
|
|
table_item = (grub_linuxbios_table_item_t) ((long) table_item + (long) table_item->size))
|
|
{
|
|
if (table_item->tag == GRUB_LINUXBIOS_MEMBER_LINK
|
|
&& check_signature ((grub_linuxbios_table_header_t) (grub_addr_t)
|
|
*(grub_uint64_t *) (table_item + 1)))
|
|
{
|
|
table_header = (grub_linuxbios_table_header_t) (grub_addr_t)
|
|
*(grub_uint64_t *) (table_item + 1);
|
|
goto signature_found;
|
|
}
|
|
if (hook (table_item, hook_data))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Context for grub_machine_mmap_iterate. */
|
|
struct grub_machine_mmap_iterate_ctx
|
|
{
|
|
grub_memory_hook_t hook;
|
|
void *hook_data;
|
|
};
|
|
|
|
#define GRUB_MACHINE_MEMORY_BADRAM 5
|
|
|
|
/* Helper for grub_machine_mmap_iterate. */
|
|
static int
|
|
iterate_linuxbios_table (grub_linuxbios_table_item_t table_item, void *data)
|
|
{
|
|
struct grub_machine_mmap_iterate_ctx *ctx = data;
|
|
mem_region_t mem_region;
|
|
|
|
if (table_item->tag != GRUB_LINUXBIOS_MEMBER_MEMORY)
|
|
return 0;
|
|
|
|
mem_region =
|
|
(mem_region_t) ((long) table_item +
|
|
sizeof (struct grub_linuxbios_table_item));
|
|
while ((long) mem_region < (long) table_item + (long) table_item->size)
|
|
{
|
|
if (ctx->hook (mem_region->addr, mem_region->size,
|
|
/* Multiboot mmaps match with the coreboot mmap
|
|
definition. Therefore, we can just pass type
|
|
through. */
|
|
(((mem_region->type <= GRUB_MACHINE_MEMORY_BADRAM) && (mem_region->type >= GRUB_MACHINE_MEMORY_AVAILABLE))
|
|
|| mem_region->type == GRUB_MEMORY_COREBOOT_TABLES) ? mem_region->type : GRUB_MEMORY_RESERVED,
|
|
ctx->hook_data))
|
|
return 1;
|
|
|
|
mem_region++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
grub_err_t
|
|
grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
|
|
{
|
|
struct grub_machine_mmap_iterate_ctx ctx = { hook, hook_data };
|
|
|
|
grub_linuxbios_table_iterate (iterate_linuxbios_table, &ctx);
|
|
|
|
return 0;
|
|
}
|