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d965f6e6a1
e820_alloc_memory() splits one E820 entry into two entries. With vEPT enabled, e820_alloc_memory() is called one more. On some platforms, the e820 entries might exceed 32. Enlarge E820_MAX_ENTRIES to 64. Please note, it must be less than 128 due to constrain of zeropage. Linux kernel defines it as 128. Tracked-On: #6168 Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
48 lines
1.2 KiB
C
48 lines
1.2 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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#include <types.h>
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/* E820 memory types */
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#define E820_TYPE_RAM 1U /* EFI 1, 2, 3, 4, 5, 6, 7 */
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#define E820_TYPE_RESERVED 2U
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/* EFI 0, 11, 12, 13 (everything not used elsewhere) */
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#define E820_TYPE_ACPI_RECLAIM 3U /* EFI 9 */
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#define E820_TYPE_ACPI_NVS 4U /* EFI 10 */
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#define E820_TYPE_UNUSABLE 5U /* EFI 8 */
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#define E820_MAX_ENTRIES 64U
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/** Defines a single entry in an E820 memory map. */
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struct e820_entry {
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/** The base address of the memory range. */
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uint64_t baseaddr;
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/** The length of the memory range. */
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uint64_t length;
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/** The type of memory region. */
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uint32_t type;
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} __packed;
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struct mem_range {
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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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};
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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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uint64_t e820_alloc_memory(uint32_t size_arg, uint64_t max_addr);
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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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#endif
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