1 /* 2 * Copyright (C) 2015, Bin Meng <bmeng.cn@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 /* 13 * Install a default e820 table with 4 entries as follows: 14 * 15 * 0x000000-0x0a0000 Useable RAM 16 * 0x0a0000-0x100000 Reserved for ISA 17 * 0x100000-gd->ram_size Useable RAM 18 * CONFIG_PCIE_ECAM_BASE PCIe ECAM 19 */ 20 __weak unsigned install_e820_map(unsigned max_entries, 21 struct e820entry *entries) 22 { 23 entries[0].addr = 0; 24 entries[0].size = ISA_START_ADDRESS; 25 entries[0].type = E820_RAM; 26 entries[1].addr = ISA_START_ADDRESS; 27 entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS; 28 entries[1].type = E820_RESERVED; 29 entries[2].addr = ISA_END_ADDRESS; 30 entries[2].size = gd->ram_size - ISA_END_ADDRESS; 31 entries[2].type = E820_RAM; 32 entries[3].addr = CONFIG_PCIE_ECAM_BASE; 33 entries[3].size = CONFIG_PCIE_ECAM_SIZE; 34 entries[3].type = E820_RESERVED; 35 36 return 4; 37 } 38