diff options
author | Aaron Durbin <adurbin@chromium.org> | 2014-02-18 21:55:02 -0600 |
---|---|---|
committer | Aaron Durbin <adurbin@google.com> | 2014-03-03 21:47:27 +0100 |
commit | 4904802efc8eee37f95163f60823509e2a208af4 (patch) | |
tree | 919d78b05dc1a4edd7ab1ec6af74bbea533580a6 /src/include/bootmem.h | |
parent | c7db28c580785b62b9fc67b7526c87d4f0073883 (diff) | |
download | coreboot-4904802efc8eee37f95163f60823509e2a208af4.tar.xz |
coreboot: introduce notion of bootmem for memory map at boot
The write_coreboot_table() in coreboot_table.c was already using
struct memrange for managing and building up the entries that
eventually go into the lb_memory table. Abstract that concept
out to a bootmem memory map. The bootmem concept can then be
used as a basis for loading payloads, for example.
Change-Id: I7edbbca6bbd0568f658fde39ca93b126cab88367
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5302
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Diffstat (limited to 'src/include/bootmem.h')
-rw-r--r-- | src/include/bootmem.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/include/bootmem.h b/src/include/bootmem.h new file mode 100644 index 0000000000..656769f8db --- /dev/null +++ b/src/include/bootmem.h @@ -0,0 +1,48 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * + * This program 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; version 2 of the License. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef BOOTMEM_H +#define BOOTMEM_H + +#include <memrange.h> +#include <stdint.h> +#include <boot/coreboot_tables.h> + +/* + * Initialize the memory address space prior to payload loading. The bootmem + * serves as the source for the lb_mem table. + */ +void bootmem_init(void); + +/* Add a range of a given type to the bootmem address space. */ +void bootmem_add_range(uint64_t start, uint64_t size, uint32_t type); + +/* Write memory coreboot table. */ +void bootmem_write_memory_table(struct lb_memory *mem); + +/* Print current range map of boot memory. */ +void bootmem_dump_ranges(void); + +/* Return 1 if region targets usable RAM, 0 otherwise. */ +int bootmem_region_targets_usable_ram(uint64_t start, uint64_t size); + +/* Allocate a temporary buffer from the unused RAM areas. */ +void *bootmem_allocate_buffer(size_t size); + +#endif /* BOOTMEM_H */ |