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