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// SPDX-License-Identifier: GPL-2.0+
/*
* QEMU x86 specific E820 table generation
*
* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
* (C) Copyright 2019 Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <env_internal.h>
#include <malloc.h>
#include <asm/e820.h>
#include <asm/arch/qemu.h>
#include <asm/global_data.h>
#include <linux/sizes.h>
DECLARE_GLOBAL_DATA_PTR;
unsigned int install_e820_map(unsigned int max_entries,
struct e820_entry *entries)
{
u64 high_mem_size;
int n = 0;
entries[n].addr = 0;
entries[n].size = ISA_START_ADDRESS;
entries[n].type = E820_RAM;
n++;
entries[n].addr = ISA_START_ADDRESS;
entries[n].size = ISA_END_ADDRESS - ISA_START_ADDRESS;
entries[n].type = E820_RESERVED;
n++;
/*
* since we use memalign(malloc) to allocate high memory for
* storing ACPI tables, we need to reserve them in e820 tables,
* otherwise kernel will reclaim them and data will be corrupted
*/
entries[n].addr = ISA_END_ADDRESS;
entries[n].size = gd->relocaddr - TOTAL_MALLOC_LEN - ISA_END_ADDRESS;
entries[n].type = E820_RAM;
n++;
/* for simplicity, reserve entire malloc space */
entries[n].addr = gd->relocaddr - TOTAL_MALLOC_LEN;
entries[n].size = TOTAL_MALLOC_LEN;
entries[n].type = E820_RESERVED;
n++;
entries[n].addr = gd->relocaddr;
entries[n].size = qemu_get_low_memory_size() - gd->relocaddr;
entries[n].type = E820_RESERVED;
n++;
entries[n].addr = CONFIG_PCIE_ECAM_BASE;
entries[n].size = CONFIG_PCIE_ECAM_SIZE;
entries[n].type = E820_RESERVED;
n++;
high_mem_size = qemu_get_high_memory_size();
if (high_mem_size) {
entries[n].addr = SZ_4G;
entries[n].size = high_mem_size;
entries[n].type = E820_RAM;
n++;
}
return n;
}
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