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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/efi.h>
#include <linux/initrd.h>
#include <linux/memblock.h>
#include <asm/bootinfo.h>
#include <asm/loongson.h>
#include <asm/sections.h>
void __init memblock_init(void)
{
u32 mem_type;
u64 mem_start, mem_size;
efi_memory_desc_t *md;
/* Parse memory information */
for_each_efi_memory_desc(md) {
mem_type = md->type;
mem_start = md->phys_addr;
mem_size = md->num_pages << EFI_PAGE_SHIFT;
switch (mem_type) {
case EFI_LOADER_CODE:
case EFI_LOADER_DATA:
case EFI_BOOT_SERVICES_CODE:
case EFI_BOOT_SERVICES_DATA:
case EFI_PERSISTENT_MEMORY:
case EFI_CONVENTIONAL_MEMORY:
memblock_add(mem_start, mem_size);
break;
case EFI_PAL_CODE:
case EFI_UNUSABLE_MEMORY:
case EFI_ACPI_RECLAIM_MEMORY:
memblock_add(mem_start, mem_size);
fallthrough;
case EFI_RESERVED_TYPE:
case EFI_RUNTIME_SERVICES_CODE:
case EFI_RUNTIME_SERVICES_DATA:
case EFI_MEMORY_MAPPED_IO:
case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
memblock_reserve(mem_start, mem_size);
break;
}
}
max_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
memblock_set_current_limit(PFN_PHYS(max_low_pfn));
/* Reserve the first 2MB */
memblock_reserve(PHYS_OFFSET, 0x200000);
/* Reserve the kernel text/data/bss */
memblock_reserve(__pa_symbol(&_text),
__pa_symbol(&_end) - __pa_symbol(&_text));
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.reserved, 0);
}
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