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 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 40 static 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("/"); 48 ret = of_property_read_string(root, "model", (const char **)&model); 49 of_node_put(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 } 59 arch_initcall(init_cpu_fullname); 60 61 static int __init fdt_cpu_clk_init(void) 62 { 63 struct clk *clk; 64 struct device_node *np; 65 66 np = of_get_cpu_node(0, NULL); 67 if (!np) 68 return -ENODEV; 69 70 clk = of_clk_get(np, 0); 71 if (IS_ERR(clk)) 72 return -ENODEV; 73 74 cpu_clock_freq = clk_get_rate(clk); 75 clk_put(clk); 76 77 return 0; 78 } 79 late_initcall(fdt_cpu_clk_init); 80 81 static ssize_t boardinfo_show(struct kobject *kobj, 82 struct kobj_attribute *attr, char *buf) 83 { 84 return sprintf(buf, 85 "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 99 static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444, 100 boardinfo_show, NULL); 101 102 static int __init boardinfo_init(void) 103 { 104 struct kobject *loongson_kobj; 105 106 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj); 107 108 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr); 109 } 110 late_initcall(boardinfo_init); 111