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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * EFI initialization
4 *
5 * Author: Jianmin Lv <lvjianmin@loongson.cn>
6 * Huacai Chen <chenhuacai@loongson.cn>
7 *
8 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
9 */
10
11#include <linux/acpi.h>
12#include <linux/efi.h>
13#include <linux/efi-bgrt.h>
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/export.h>
17#include <linux/io.h>
18#include <linux/kobject.h>
19#include <linux/memblock.h>
20#include <linux/reboot.h>
21#include <linux/screen_info.h>
22#include <linux/uaccess.h>
23
24#include <asm/early_ioremap.h>
25#include <asm/efi.h>
26#include <asm/loongson.h>
27
28static unsigned long efi_nr_tables;
29static unsigned long efi_config_table;
30
31static unsigned long __initdata boot_memmap = EFI_INVALID_TABLE_ADDR;
32static unsigned long __initdata fdt_pointer = EFI_INVALID_TABLE_ADDR;
33
34static efi_system_table_t *efi_systab;
35static efi_config_table_type_t arch_tables[] __initdata = {
36 {LINUX_EFI_BOOT_MEMMAP_GUID, &boot_memmap, "MEMMAP" },
37 {DEVICE_TREE_GUID, &fdt_pointer, "FDTPTR" },
38 {},
39};
40
41void __init *efi_fdt_pointer(void)
42{
43 if (!efi_systab)
44 return NULL;
45
46 if (fdt_pointer == EFI_INVALID_TABLE_ADDR)
47 return NULL;
48
49 return early_memremap_ro(fdt_pointer, SZ_64K);
50}
51
52void __init efi_runtime_init(void)
53{
54 if (!efi_enabled(EFI_BOOT) || !efi_systab->runtime)
55 return;
56
57 if (efi_runtime_disabled()) {
58 pr_info("EFI runtime services will be disabled.\n");
59 return;
60 }
61
62 efi.runtime = (efi_runtime_services_t *)efi_systab->runtime;
63 efi.runtime_version = (unsigned int)efi.runtime->hdr.revision;
64
65 efi_native_runtime_setup();
66 set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
67}
68
69unsigned long __initdata screen_info_table = EFI_INVALID_TABLE_ADDR;
70
71#if defined(CONFIG_SYSFB) || defined(CONFIG_EFI_EARLYCON)
72struct screen_info screen_info __section(".data");
73EXPORT_SYMBOL_GPL(screen_info);
74#endif
75
76static void __init init_screen_info(void)
77{
78 struct screen_info *si;
79
80 if (screen_info_table == EFI_INVALID_TABLE_ADDR)
81 return;
82
83 si = early_memremap(screen_info_table, sizeof(*si));
84 if (!si) {
85 pr_err("Could not map screen_info config table\n");
86 return;
87 }
88 screen_info = *si;
89 memset(si, 0, sizeof(*si));
90 early_memunmap(si, sizeof(*si));
91
92 memblock_reserve(screen_info.lfb_base, screen_info.lfb_size);
93}
94
95void __init efi_init(void)
96{
97 int size;
98 void *config_tables;
99 struct efi_boot_memmap *tbl;
100
101 if (!efi_system_table)
102 return;
103
104 efi_systab = (efi_system_table_t *)early_memremap_ro(efi_system_table, sizeof(*efi_systab));
105 if (!efi_systab) {
106 pr_err("Can't find EFI system table.\n");
107 return;
108 }
109
110 efi_systab_report_header(&efi_systab->hdr, efi_systab->fw_vendor);
111
112 set_bit(EFI_64BIT, &efi.flags);
113 efi_nr_tables = efi_systab->nr_tables;
114 efi_config_table = (unsigned long)efi_systab->tables;
115
116 size = sizeof(efi_config_table_t);
117 config_tables = early_memremap(efi_config_table, efi_nr_tables * size);
118 efi_config_parse_tables(config_tables, efi_systab->nr_tables, arch_tables);
119 early_memunmap(config_tables, efi_nr_tables * size);
120
121 set_bit(EFI_CONFIG_TABLES, &efi.flags);
122
123 if (IS_ENABLED(CONFIG_EFI_EARLYCON) || IS_ENABLED(CONFIG_SYSFB))
124 init_screen_info();
125
126 if (boot_memmap == EFI_INVALID_TABLE_ADDR)
127 return;
128
129 tbl = early_memremap_ro(boot_memmap, sizeof(*tbl));
130 if (tbl) {
131 struct efi_memory_map_data data;
132
133 data.phys_map = boot_memmap + sizeof(*tbl);
134 data.size = tbl->map_size;
135 data.desc_size = tbl->desc_size;
136 data.desc_version = tbl->desc_ver;
137
138 if (efi_memmap_init_early(&data) < 0)
139 panic("Unable to map EFI memory map.\n");
140
141 early_memunmap(tbl, sizeof(*tbl));
142 }
143
144 efi_esrt_init();
145}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * EFI initialization
4 *
5 * Author: Jianmin Lv <lvjianmin@loongson.cn>
6 * Huacai Chen <chenhuacai@loongson.cn>
7 *
8 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
9 */
10
11#include <linux/acpi.h>
12#include <linux/efi.h>
13#include <linux/efi-bgrt.h>
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/export.h>
17#include <linux/io.h>
18#include <linux/kobject.h>
19#include <linux/memblock.h>
20#include <linux/reboot.h>
21#include <linux/screen_info.h>
22#include <linux/uaccess.h>
23
24#include <asm/early_ioremap.h>
25#include <asm/efi.h>
26#include <asm/loongson.h>
27
28static unsigned long efi_nr_tables;
29static unsigned long efi_config_table;
30
31static unsigned long __initdata boot_memmap = EFI_INVALID_TABLE_ADDR;
32static unsigned long __initdata fdt_pointer = EFI_INVALID_TABLE_ADDR;
33
34static efi_system_table_t *efi_systab;
35static efi_config_table_type_t arch_tables[] __initdata = {
36 {LINUX_EFI_BOOT_MEMMAP_GUID, &boot_memmap, "MEMMAP" },
37 {DEVICE_TREE_GUID, &fdt_pointer, "FDTPTR" },
38 {},
39};
40
41void __init *efi_fdt_pointer(void)
42{
43 if (!efi_systab)
44 return NULL;
45
46 if (fdt_pointer == EFI_INVALID_TABLE_ADDR)
47 return NULL;
48
49 return early_memremap_ro(fdt_pointer, SZ_64K);
50}
51
52void __init efi_runtime_init(void)
53{
54 if (!efi_enabled(EFI_BOOT) || !efi_systab->runtime)
55 return;
56
57 if (efi_runtime_disabled()) {
58 pr_info("EFI runtime services will be disabled.\n");
59 return;
60 }
61
62 efi.runtime = (efi_runtime_services_t *)efi_systab->runtime;
63 efi.runtime_version = (unsigned int)efi.runtime->hdr.revision;
64
65 efi_native_runtime_setup();
66 set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
67}
68
69unsigned long __initdata screen_info_table = EFI_INVALID_TABLE_ADDR;
70
71#if defined(CONFIG_SYSFB) || defined(CONFIG_EFI_EARLYCON)
72struct screen_info screen_info __section(".data");
73EXPORT_SYMBOL_GPL(screen_info);
74#endif
75
76static void __init init_screen_info(void)
77{
78 struct screen_info *si;
79
80 if (screen_info_table == EFI_INVALID_TABLE_ADDR)
81 return;
82
83 si = early_memremap(screen_info_table, sizeof(*si));
84 if (!si) {
85 pr_err("Could not map screen_info config table\n");
86 return;
87 }
88 screen_info = *si;
89 memset(si, 0, sizeof(*si));
90 early_memunmap(si, sizeof(*si));
91
92 memblock_reserve(screen_info.lfb_base, screen_info.lfb_size);
93}
94
95void __init efi_init(void)
96{
97 int size;
98 void *config_tables;
99 struct efi_boot_memmap *tbl;
100
101 if (!efi_system_table)
102 return;
103
104 efi_systab = (efi_system_table_t *)early_memremap_ro(efi_system_table, sizeof(*efi_systab));
105 if (!efi_systab) {
106 pr_err("Can't find EFI system table.\n");
107 return;
108 }
109
110 efi_systab_report_header(&efi_systab->hdr, efi_systab->fw_vendor);
111
112 set_bit(EFI_64BIT, &efi.flags);
113 efi_nr_tables = efi_systab->nr_tables;
114 efi_config_table = (unsigned long)efi_systab->tables;
115
116 size = sizeof(efi_config_table_t);
117 config_tables = early_memremap(efi_config_table, efi_nr_tables * size);
118 efi_config_parse_tables(config_tables, efi_systab->nr_tables, arch_tables);
119 early_memunmap(config_tables, efi_nr_tables * size);
120
121 set_bit(EFI_CONFIG_TABLES, &efi.flags);
122
123 if (IS_ENABLED(CONFIG_EFI_EARLYCON) || IS_ENABLED(CONFIG_SYSFB))
124 init_screen_info();
125
126 if (boot_memmap == EFI_INVALID_TABLE_ADDR)
127 return;
128
129 tbl = early_memremap_ro(boot_memmap, sizeof(*tbl));
130 if (tbl) {
131 struct efi_memory_map_data data;
132
133 data.phys_map = boot_memmap + sizeof(*tbl);
134 data.size = tbl->map_size;
135 data.desc_size = tbl->desc_size;
136 data.desc_version = tbl->desc_ver;
137
138 if (efi_memmap_init_early(&data) < 0)
139 panic("Unable to map EFI memory map.\n");
140
141 early_memunmap(tbl, sizeof(*tbl));
142 }
143
144 efi_esrt_init();
145}