diff options
Diffstat (limited to 'arch/loongarch/kernel/mem.c')
| -rw-r--r-- | arch/loongarch/kernel/mem.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/mem.c b/arch/loongarch/kernel/mem.c new file mode 100644 index 000000000..aed901c57 --- /dev/null +++ b/arch/loongarch/kernel/mem.c @@ -0,0 +1,63 @@ +// 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); +} |