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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*/
#include <common.h>
#include <efi_loader.h>
#include <asm/e820.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Install a default e820 table with 4 entries as follows:
*
* 0x000000-0x0a0000 Useable RAM
* 0x0a0000-0x100000 Reserved for ISA
* 0x100000-gd->ram_size Useable RAM
* CONFIG_PCIE_ECAM_BASE PCIe ECAM
*/
__weak unsigned int install_e820_map(unsigned int max_entries,
struct e820_entry *entries)
{
entries[0].addr = 0;
entries[0].size = ISA_START_ADDRESS;
entries[0].type = E820_RAM;
entries[1].addr = ISA_START_ADDRESS;
entries[1].size = ISA_END_ADDRESS - ISA_START_ADDRESS;
entries[1].type = E820_RESERVED;
entries[2].addr = ISA_END_ADDRESS;
entries[2].size = gd->ram_size - ISA_END_ADDRESS;
entries[2].type = E820_RAM;
entries[3].addr = CONFIG_PCIE_ECAM_BASE;
entries[3].size = CONFIG_PCIE_ECAM_SIZE;
entries[3].type = E820_RESERVED;
return 4;
}
#if CONFIG_IS_ENABLED(EFI_LOADER)
void efi_add_known_memory(void)
{
struct e820_entry e820[E820MAX];
unsigned int i, num;
u64 start, pages, ram_top;
int type;
num = install_e820_map(ARRAY_SIZE(e820), e820);
ram_top = (u64)gd->ram_top & ~EFI_PAGE_MASK;
if (!ram_top)
ram_top = 0x100000000ULL;
for (i = 0; i < num; ++i) {
start = e820[i].addr;
switch (e820[i].type) {
case E820_RAM:
type = EFI_CONVENTIONAL_MEMORY;
break;
case E820_RESERVED:
type = EFI_RESERVED_MEMORY_TYPE;
break;
case E820_ACPI:
type = EFI_ACPI_RECLAIM_MEMORY;
break;
case E820_NVS:
type = EFI_ACPI_MEMORY_NVS;
break;
case E820_UNUSABLE:
default:
type = EFI_UNUSABLE_MEMORY;
break;
}
if (type == EFI_CONVENTIONAL_MEMORY) {
efi_add_conventional_memory_map(start,
start + e820[i].size,
ram_top);
} else {
pages = ALIGN(e820[i].size, EFI_PAGE_SIZE)
>> EFI_PAGE_SHIFT;
efi_add_memory_map(start, pages, type, false);
}
}
}
#endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
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