1 /* 2 * (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/e820.h> 9 10 DECLARE_GLOBAL_DATA_PTR; 11 12 unsigned int install_e820_map(unsigned int max_entries, 13 struct e820_entry *entries) 14 { 15 entries[0].addr = 0; 16 entries[0].size = ISA_START_ADDRESS; 17 entries[0].type = E820_RAM; 18 19 entries[1].addr = ISA_START_ADDRESS; 20 entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS; 21 entries[1].type = E820_RESERVED; 22 23 /* 24 * since we use memalign(malloc) to allocate high memory for 25 * storing ACPI tables, we need to reserve them in e820 tables, 26 * otherwise kernel will reclaim them and data will be corrupted 27 */ 28 entries[2].addr = ISA_END_ADDRESS; 29 entries[2].size = gd->relocaddr - TOTAL_MALLOC_LEN - ISA_END_ADDRESS; 30 entries[2].type = E820_RAM; 31 32 /* for simplicity, reserve entire malloc space */ 33 entries[3].addr = gd->relocaddr - TOTAL_MALLOC_LEN; 34 entries[3].size = TOTAL_MALLOC_LEN; 35 entries[3].type = E820_RESERVED; 36 37 entries[4].addr = gd->relocaddr; 38 entries[4].size = gd->ram_size - gd->relocaddr; 39 entries[4].type = E820_RESERVED; 40 41 entries[5].addr = CONFIG_PCIE_ECAM_BASE; 42 entries[5].size = CONFIG_PCIE_ECAM_SIZE; 43 entries[5].type = E820_RESERVED; 44 45 return 6; 46 } 47