e820_memory_layout.c (1071B)
1 /* 2 * QEMU BIOS e820 routines 3 * 4 * Copyright (c) 2003-2004 Fabrice Bellard 5 * 6 * SPDX-License-Identifier: MIT 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qemu/bswap.h" 11 #include "e820_memory_layout.h" 12 13 static size_t e820_entries; 14 struct e820_entry *e820_table; 15 16 int e820_add_entry(uint64_t address, uint64_t length, uint32_t type) 17 { 18 /* new "etc/e820" file -- include ram and reserved entries */ 19 e820_table = g_renew(struct e820_entry, e820_table, e820_entries + 1); 20 e820_table[e820_entries].address = cpu_to_le64(address); 21 e820_table[e820_entries].length = cpu_to_le64(length); 22 e820_table[e820_entries].type = cpu_to_le32(type); 23 e820_entries++; 24 25 return e820_entries; 26 } 27 28 int e820_get_num_entries(void) 29 { 30 return e820_entries; 31 } 32 33 bool e820_get_entry(int idx, uint32_t type, uint64_t *address, uint64_t *length) 34 { 35 if (idx < e820_entries && e820_table[idx].type == cpu_to_le32(type)) { 36 *address = le64_to_cpu(e820_table[idx].address); 37 *length = le64_to_cpu(e820_table[idx].length); 38 return true; 39 } 40 return false; 41 }