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75 lines
1.7 KiB
75 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2015, Bin Meng <[email protected]> |
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*/ |
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#include <common.h> |
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#include <efi_loader.h> |
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#include <asm/e820.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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/* |
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* Install a default e820 table with 4 entries as follows: |
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* |
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* 0x000000-0x0a0000 Useable RAM |
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* 0x0a0000-0x100000 Reserved for ISA |
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* 0x100000-gd->ram_size Useable RAM |
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* CONFIG_PCIE_ECAM_BASE PCIe ECAM |
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*/ |
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__weak 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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entries[0].addr = 0; |
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entries[0].size = ISA_START_ADDRESS; |
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entries[0].type = E820_RAM; |
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entries[1].addr = ISA_START_ADDRESS; |
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entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS; |
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entries[1].type = E820_RESERVED; |
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entries[2].addr = ISA_END_ADDRESS; |
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entries[2].size = gd->ram_size - ISA_END_ADDRESS; |
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entries[2].type = E820_RAM; |
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entries[3].addr = CONFIG_PCIE_ECAM_BASE; |
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entries[3].size = CONFIG_PCIE_ECAM_SIZE; |
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entries[3].type = E820_RESERVED; |
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return 4; |
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} |
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#if CONFIG_IS_ENABLED(EFI_LOADER) |
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void efi_add_known_memory(void) |
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{ |
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struct e820_entry e820[E820MAX]; |
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unsigned int i, num; |
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u64 start, pages; |
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int type; |
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num = install_e820_map(ARRAY_SIZE(e820), e820); |
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for (i = 0; i < num; ++i) { |
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start = e820[i].addr; |
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pages = ALIGN(e820[i].size, EFI_PAGE_SIZE) >> EFI_PAGE_SHIFT; |
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switch (e820[i].type) { |
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case E820_RAM: |
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type = EFI_CONVENTIONAL_MEMORY; |
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break; |
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case E820_RESERVED: |
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type = EFI_RESERVED_MEMORY_TYPE; |
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break; |
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case E820_ACPI: |
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type = EFI_ACPI_RECLAIM_MEMORY; |
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break; |
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case E820_NVS: |
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type = EFI_ACPI_MEMORY_NVS; |
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break; |
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case E820_UNUSABLE: |
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default: |
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type = EFI_UNUSABLE_MEMORY; |
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break; |
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} |
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efi_add_memory_map(start, pages, type, false); |
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} |
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} |
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#endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
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