1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> 4 */ 5 6 #include <common.h> 7 #include <asm/e820.h> 8 9 DECLARE_GLOBAL_DATA_PTR; 10 11 /* 12 * Install a default e820 table with 4 entries as follows: 13 * 14 * 0x000000-0x0a0000 Useable RAM 15 * 0x0a0000-0x100000 Reserved for ISA 16 * 0x100000-gd->ram_size Useable RAM 17 * CONFIG_PCIE_ECAM_BASE PCIe ECAM 18 */ 19 __weak unsigned int install_e820_map(unsigned int max_entries, 20 struct e820_entry *entries) 21 { 22 entries[0].addr = 0; 23 entries[0].size = ISA_START_ADDRESS; 24 entries[0].type = E820_RAM; 25 entries[1].addr = ISA_START_ADDRESS; 26 entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS; 27 entries[1].type = E820_RESERVED; 28 entries[2].addr = ISA_END_ADDRESS; 29 entries[2].size = gd->ram_size - ISA_END_ADDRESS; 30 entries[2].type = E820_RAM; 31 entries[3].addr = CONFIG_PCIE_ECAM_BASE; 32 entries[3].size = CONFIG_PCIE_ECAM_SIZE; 33 entries[3].type = E820_RESERVED; 34 35 return 4; 36 } 37