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 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 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 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); 106 107 static int __init boardinfo_init(void) 108 { 109 struct kobject *loongson_kobj; 110 111 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj); 112 113 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr); 114 } 115 late_initcall(boardinfo_init); 116