src/include/bootmem.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2014 Google Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef BOOTMEM_H
  17 #define BOOTMEM_H
  18
  19 #include <memrange.h>
  20 #include <stdint.h>
  21 #include <boot/coreboot_tables.h>
  22
  23 /*
  24  * Initialize the memory address space prior to payload loading. The bootmem
  25  * serves as the source for the lb_mem table.
  26  */
  27 void bootmem_init(void);
  28
  29 /* Architecture hook to add bootmem areas the architecture controls. */
  30 void bootmem_arch_add_ranges(void);
  31
  32 /* Add a range of a given type to the bootmem address space. */
  33 void bootmem_add_range(uint64_t start, uint64_t size, uint32_t type);
  34
  35 /* Write memory coreboot table. */
  36 void bootmem_write_memory_table(struct lb_memory *mem);
  37
  38 /* Print current range map of boot memory. */
  39 void bootmem_dump_ranges(void);
  40
  41 /* Return 1 if region targets usable RAM, 0 otherwise. */
  42 int bootmem_region_targets_usable_ram(uint64_t start, uint64_t size);
  43
  44 /* Allocate a temporary buffer from the unused RAM areas. */
  45 void *bootmem_allocate_buffer(size_t size);
  46
  47 #endif /* BOOTMEM_H */