// 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_end, 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; mem_end = mem_start + mem_size; 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); if (max_low_pfn < (mem_end >> PAGE_SHIFT)) max_low_pfn = mem_end >> PAGE_SHIFT; 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; } } 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); }