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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>
- 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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