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 <asm/early_ioremap.h> 12 #include <asm/bootinfo.h> 13 #include <asm/loongson.h> 14 #include <asm/setup.h> 15 16 u64 efi_system_table; 17 struct loongson_system_configuration loongson_sysconf; 18 EXPORT_SYMBOL(loongson_sysconf); 19 20 void __init init_environ(void) 21 { 22 int efi_boot = fw_arg0; 23 char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE); 24 25 if (efi_boot) 26 set_bit(EFI_BOOT, &efi.flags); 27 else 28 clear_bit(EFI_BOOT, &efi.flags); 29 30 strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE); 31 strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE); 32 early_memunmap(cmdline, COMMAND_LINE_SIZE); 33 34 efi_system_table = fw_arg2; 35 } 36 37 static int __init init_cpu_fullname(void) 38 { 39 int cpu; 40 41 if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) { 42 for (cpu = 0; cpu < NR_CPUS; cpu++) 43 __cpu_full_name[cpu] = loongson_sysconf.cpuname; 44 } 45 return 0; 46 } 47 arch_initcall(init_cpu_fullname); 48 49 static ssize_t boardinfo_show(struct kobject *kobj, 50 struct kobj_attribute *attr, char *buf) 51 { 52 return sprintf(buf, 53 "BIOS Information\n" 54 "Vendor\t\t\t: %s\n" 55 "Version\t\t\t: %s\n" 56 "ROM Size\t\t: %d KB\n" 57 "Release Date\t\t: %s\n\n" 58 "Board Information\n" 59 "Manufacturer\t\t: %s\n" 60 "Board Name\t\t: %s\n" 61 "Family\t\t\t: LOONGSON64\n\n", 62 b_info.bios_vendor, b_info.bios_version, 63 b_info.bios_size, b_info.bios_release_date, 64 b_info.board_vendor, b_info.board_name); 65 } 66 67 static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444, 68 boardinfo_show, NULL); 69 70 static int __init boardinfo_init(void) 71 { 72 struct kobject *loongson_kobj; 73 74 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj); 75 76 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr); 77 } 78 late_initcall(boardinfo_init); 79