4677f6bbfa
In https://review.coreboot.org/25383 people were confused about the ordering of bootmem calls w.r.t. when entries are exposed to the OS. To alleviate this add a notion of bootmem being initialized. In addition to that, only mark bootmem initialized when bootmem_write_memory_table() is called. Any other calls to bootmem before that will report an error on the console. Change-Id: I5bc31f555038ccabb82d902c54f95858679b1695 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/25503 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2014 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef BOOTMEM_H
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#define BOOTMEM_H
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#include <memrange.h>
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#include <stdint.h>
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#include <boot/coreboot_tables.h>
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/* Write memory coreboot table. Current resource map is serialized into
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* memtable (LB_MEM_* types). bootmem library is unusable until this function
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* is called first in the write tables path before payload is loaded. */
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void bootmem_write_memory_table(struct lb_memory *mem);
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/* Architecture hook to add bootmem areas the architecture controls when
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* bootmem_write_memory_table() is called. */
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void bootmem_arch_add_ranges(void);
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/* Add a range of a given type to the bootmem address space. */
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void bootmem_add_range(uint64_t start, uint64_t size, uint32_t type);
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/* Print current range map of boot memory. */
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void bootmem_dump_ranges(void);
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/* Return 1 if region targets usable RAM, 0 otherwise. */
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int bootmem_region_targets_usable_ram(uint64_t start, uint64_t size);
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/* Allocate a temporary buffer from the unused RAM areas. */
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void *bootmem_allocate_buffer(size_t size);
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#endif /* BOOTMEM_H */
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