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/clk.h>
9 #include <linux/efi.h>
10 #include <linux/export.h>
11 #include <linux/memblock.h>
12 #include <linux/of_clk.h>
13 #include <asm/early_ioremap.h>
14 #include <asm/bootinfo.h>
15 #include <asm/loongson.h>
16 #include <asm/setup.h>
17 #include <asm/time.h>
18
19 u64 efi_system_table;
20 struct loongson_system_configuration loongson_sysconf;
21 EXPORT_SYMBOL(loongson_sysconf);
22
init_environ(void)23 void __init init_environ(void)
24 {
25 int efi_boot = fw_arg0;
26 char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE);
27
28 if (efi_boot)
29 set_bit(EFI_BOOT, &efi.flags);
30 else
31 clear_bit(EFI_BOOT, &efi.flags);
32
33 strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
34 strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE);
35 early_memunmap(cmdline, COMMAND_LINE_SIZE);
36
37 efi_system_table = fw_arg2;
38 }
39
init_cpu_fullname(void)40 static int __init init_cpu_fullname(void)
41 {
42 int cpu, ret;
43 char *cpuname;
44 const char *model;
45 struct device_node *root;
46
47 /* Parsing cpuname from DTS model property */
48 root = of_find_node_by_path("/");
49 ret = of_property_read_string(root, "model", &model);
50 if (ret == 0) {
51 cpuname = kstrdup(model, GFP_KERNEL);
52 loongson_sysconf.cpuname = strsep(&cpuname, " ");
53 }
54 of_node_put(root);
55
56 if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
57 for (cpu = 0; cpu < NR_CPUS; cpu++)
58 __cpu_full_name[cpu] = loongson_sysconf.cpuname;
59 }
60 return 0;
61 }
62 arch_initcall(init_cpu_fullname);
63
fdt_cpu_clk_init(void)64 static int __init fdt_cpu_clk_init(void)
65 {
66 struct clk *clk;
67 struct device_node *np;
68
69 np = of_get_cpu_node(0, NULL);
70 if (!np)
71 return -ENODEV;
72
73 clk = of_clk_get(np, 0);
74 of_node_put(np);
75
76 if (IS_ERR(clk))
77 return -ENODEV;
78
79 cpu_clock_freq = clk_get_rate(clk);
80 clk_put(clk);
81
82 return 0;
83 }
84 late_initcall(fdt_cpu_clk_init);
85
boardinfo_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)86 static ssize_t boardinfo_show(struct kobject *kobj,
87 struct kobj_attribute *attr, char *buf)
88 {
89 return sprintf(buf,
90 "BIOS Information\n"
91 "Vendor\t\t\t: %s\n"
92 "Version\t\t\t: %s\n"
93 "ROM Size\t\t: %d KB\n"
94 "Release Date\t\t: %s\n\n"
95 "Board Information\n"
96 "Manufacturer\t\t: %s\n"
97 "Board Name\t\t: %s\n"
98 "Family\t\t\t: LOONGSON64\n\n",
99 b_info.bios_vendor, b_info.bios_version,
100 b_info.bios_size, b_info.bios_release_date,
101 b_info.board_vendor, b_info.board_name);
102 }
103
104 static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444,
105 boardinfo_show, NULL);
106
boardinfo_init(void)107 static int __init boardinfo_init(void)
108 {
109 struct kobject *loongson_kobj;
110
111 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj);
112 if (!loongson_kobj)
113 return -ENOMEM;
114
115 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr);
116 }
117 late_initcall(boardinfo_init);
118