git.sur5r.net Git - u-boot/blob - arch/x86/lib/e820.c

   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 }