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

source code of linux/arch/loongarch/kernel/env.c