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