LXR uboot/arch/x86/cpu/qemu/e820.c

   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
  10DECLARE_GLOBAL_DATA_PTR;
  11
  12unsigned install_e820_map(unsigned max_entries, struct e820entry *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