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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 <bloblist.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;
struct e820_ctx ctx;
e820_init(&ctx, entries, max_entries);
e820_next(&ctx, E820_RAM, ISA_START_ADDRESS);
e820_next(&ctx, E820_RESERVED, ISA_END_ADDRESS);
/*
* if we use bloblist to allocate high memory for storing ACPI tables,
* we need to reserve that region in e820 tables, otherwise the kernel
* will reclaim them and data will be corrupted. The ACPI tables may not
* have been written yet, so use the whole bloblist size
*/
if (IS_ENABLED(CONFIG_BLOBLIST_TABLES)) {
e820_to_addr(&ctx, E820_RAM, (ulong)gd->bloblist);
e820_next(&ctx, E820_ACPI, bloblist_get_total_size());
} else {
/* If using memalign() reserve that whole region instead */
e820_to_addr(&ctx, E820_RAM, gd->relocaddr - TOTAL_MALLOC_LEN);
e820_next(&ctx, E820_ACPI, TOTAL_MALLOC_LEN);
}
e820_to_addr(&ctx, E820_RAM, qemu_get_low_memory_size());
e820_add(&ctx, E820_RESERVED, CONFIG_PCIE_ECAM_BASE,
CONFIG_PCIE_ECAM_SIZE);
high_mem_size = qemu_get_high_memory_size();
if (high_mem_size)
e820_add(&ctx, E820_RAM, SZ_4G, high_mem_size);
return e820_finish(&ctx);
}
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