1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5 #include <linux/efi.h>
6 #include <linux/initrd.h>
7 #include <linux/memblock.h>
8
9 #include <asm/bootinfo.h>
10 #include <asm/loongson.h>
11 #include <asm/sections.h>
12
memblock_init(void)13 void __init memblock_init(void)
14 {
15 u32 mem_type;
16 u64 mem_start, mem_size;
17 efi_memory_desc_t *md;
18
19 /* Parse memory information */
20 for_each_efi_memory_desc(md) {
21 mem_type = md->type;
22 mem_start = md->phys_addr;
23 mem_size = md->num_pages << EFI_PAGE_SHIFT;
24
25 switch (mem_type) {
26 case EFI_LOADER_CODE:
27 case EFI_LOADER_DATA:
28 case EFI_BOOT_SERVICES_CODE:
29 case EFI_BOOT_SERVICES_DATA:
30 case EFI_PERSISTENT_MEMORY:
31 case EFI_CONVENTIONAL_MEMORY:
32 memblock_add(mem_start, mem_size);
33 break;
34 case EFI_PAL_CODE:
35 case EFI_UNUSABLE_MEMORY:
36 case EFI_ACPI_RECLAIM_MEMORY:
37 memblock_add(mem_start, mem_size);
38 fallthrough;
39 case EFI_RESERVED_TYPE:
40 case EFI_RUNTIME_SERVICES_CODE:
41 case EFI_RUNTIME_SERVICES_DATA:
42 case EFI_MEMORY_MAPPED_IO:
43 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
44 memblock_reserve(mem_start, mem_size);
45 break;
46 }
47 }
48
49 max_pfn = PFN_DOWN(memblock_end_of_DRAM());
50 max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
51 memblock_set_current_limit(PFN_PHYS(max_low_pfn));
52
53 /* Reserve the first 2MB */
54 memblock_reserve(PHYS_OFFSET, 0x200000);
55
56 /* Reserve the kernel text/data/bss */
57 memblock_reserve(__pa_symbol(&_text),
58 __pa_symbol(&_end) - __pa_symbol(&_text));
59
60 memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
61 memblock_set_node(0, PHYS_ADDR_MAX, &memblock.reserved, 0);
62 }
63