1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Author: Huacai Chen <chenhuacai@loongson.cn>
4 *
5 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
6 */
7 #include <linux/acpi.h>
8 #include <linux/efi.h>
9 #include <linux/export.h>
10 #include <linux/memblock.h>
11 #include <linux/of_fdt.h>
12 #include <asm/early_ioremap.h>
13 #include <asm/bootinfo.h>
14 #include <loongson.h>
15
16 u64 efi_system_table;
17 unsigned long long smp_group[MAX_PACKAGES];
18 struct loongson_system_configuration loongson_sysconf;
19 EXPORT_SYMBOL(loongson_sysconf);
20
register_addrs_set(u64 *registers, const u64 addr, int num)21 static void __init register_addrs_set(u64 *registers, const u64 addr, int num)
22 {
23 u64 i;
24
25 for (i = 0; i < num; i++) {
26 *registers = (i << 44) | addr;
27 registers++;
28 }
29 }
30
init_environ(void)31 void __init init_environ(void)
32 {
33 int efi_boot = fw_arg0;
34 char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE);
35
36 if (efi_boot)
37 set_bit(EFI_BOOT, &efi.flags);
38 else
39 clear_bit(EFI_BOOT, &efi.flags);
40
41 strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
42 early_memunmap(cmdline, COMMAND_LINE_SIZE);
43
44 efi_system_table = fw_arg2;
45 register_addrs_set(smp_group, TO_UNCACHE(0x1fe01000), 16);
46 }
47
init_cpu_fullname(void)48 static int __init init_cpu_fullname(void)
49 {
50 int cpu;
51
52 if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
53 for (cpu = 0; cpu < NR_CPUS; cpu++)
54 __cpu_full_name[cpu] = loongson_sysconf.cpuname;
55 }
56 return 0;
57 }
58 arch_initcall(init_cpu_fullname);
59
boardinfo_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)60 static ssize_t boardinfo_show(struct kobject *kobj,
61 struct kobj_attribute *attr, char *buf)
62 {
63 return sprintf(buf,
64 "BIOS Information\n"
65 "Vendor\t\t\t: %s\n"
66 "Version\t\t\t: %s\n"
67 "ROM Size\t\t: %d KB\n"
68 "Release Date\t\t: %s\n\n"
69 "Board Information\n"
70 "Manufacturer\t\t: %s\n"
71 "Board Name\t\t: %s\n"
72 "Family\t\t\t: LOONGSON64\n\n",
73 b_info.bios_vendor, b_info.bios_version,
74 b_info.bios_size, b_info.bios_release_date,
75 b_info.board_vendor, b_info.board_name);
76 }
77
78 static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444,
79 boardinfo_show, NULL);
80
boardinfo_init(void)81 static int __init boardinfo_init(void)
82 {
83 struct kobject *loongson_kobj;
84
85 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj);
86
87 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr);
88 }
89 late_initcall(boardinfo_init);
90