51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef E820_H
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#define E820_H
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struct e820_mem_params {
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uint64_t mem_bottom;
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uint64_t mem_top;
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uint64_t total_mem_size;
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uint64_t max_ram_blk_base; /* used for the start address of UOS */
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uint64_t max_ram_blk_size;
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};
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/* HV read multiboot header to get e820 entries info and calc total RAM info */
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void init_e820(void);
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/* before boot vm0(service OS), call it to hide the HV RAM entry in e820 table from vm0 */
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void rebuild_vm0_e820(void);
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/* get some RAM below 1MB in e820 entries, hide it from vm0, return its start address */
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uint64_t e820_alloc_low_memory(uint32_t size_arg);
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/* copy the original e820 entries info to param_e820 */
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uint32_t create_e820_table(struct e820_entry *param_e820);
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/* get total number of the e820 entries */
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uint32_t get_e820_entries_count(void);
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/* get the e802 entiries */
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const struct e820_entry *get_e820_entry(void);
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/* get the e820 total memory info */
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const struct e820_mem_params *get_e820_mem_info(void);
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#ifdef CONFIG_PARTITION_MODE
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/*
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* Default e820 mem map:
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*
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* Assumption is every VM launched by ACRN in partition mode uses 2G of RAM.
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* there is reserved memory of 64K for MPtable and PCI hole of 512MB
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*/
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#define NUM_E820_ENTRIES 5U
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extern const struct e820_entry e820_default_entries[NUM_E820_ENTRIES];
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#endif
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#endif
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