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