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/sections.h>
11
12 #include <loongson.h>
13
memblock_init(void)14 void __init memblock_init(void)
15 {
16 u32 mem_type;
17 u64 mem_start, mem_end, mem_size;
18 efi_memory_desc_t *md;
19
20 /* Parse memory information */
21 for_each_efi_memory_desc(md) {
22 mem_type = md->type;
23 mem_start = md->phys_addr;
24 mem_size = md->num_pages << EFI_PAGE_SHIFT;
25 mem_end = mem_start + mem_size;
26
27 switch (mem_type) {
28 case EFI_LOADER_CODE:
29 case EFI_LOADER_DATA:
30 case EFI_BOOT_SERVICES_CODE:
31 case EFI_BOOT_SERVICES_DATA:
32 case EFI_PERSISTENT_MEMORY:
33 case EFI_CONVENTIONAL_MEMORY:
34 memblock_add(mem_start, mem_size);
35 if (max_low_pfn < (mem_end >> PAGE_SHIFT))
36 max_low_pfn = mem_end >> PAGE_SHIFT;
37 break;
38 case EFI_PAL_CODE:
39 case EFI_UNUSABLE_MEMORY:
40 case EFI_ACPI_RECLAIM_MEMORY:
41 memblock_add(mem_start, mem_size);
42 fallthrough;
43 case EFI_RESERVED_TYPE:
44 case EFI_RUNTIME_SERVICES_CODE:
45 case EFI_RUNTIME_SERVICES_DATA:
46 case EFI_MEMORY_MAPPED_IO:
47 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
48 memblock_reserve(mem_start, mem_size);
49 break;
50 }
51 }
52
53 memblock_set_current_limit(PFN_PHYS(max_low_pfn));
54
55 /* Reserve the first 2MB */
56 memblock_reserve(PHYS_OFFSET, 0x200000);
57
58 /* Reserve the kernel text/data/bss */
59 memblock_reserve(__pa_symbol(&_text),
60 __pa_symbol(&_end) - __pa_symbol(&_text));
61
62 memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
63 memblock_set_node(0, PHYS_ADDR_MAX, &memblock.reserved, 0);
64 }
65