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 <linux/of_fdt.h> 12 #include <asm/early_ioremap.h> 13 #include <asm/bootinfo.h> 14 #include <asm/loongson.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 struct efi_memory_map_data data; 24 void *fdt_ptr = early_memremap_ro(fw_arg1, SZ_64K); 25 26 if (efi_boot) 27 set_bit(EFI_BOOT, &efi.flags); 28 else 29 clear_bit(EFI_BOOT, &efi.flags); 30 31 early_init_dt_scan(fdt_ptr); 32 early_init_fdt_reserve_self(); 33 efi_system_table = efi_get_fdt_params(&data); 34 35 efi_memmap_init_early(&data); 36 memblock_reserve(data.phys_map & PAGE_MASK, 37 PAGE_ALIGN(data.size + (data.phys_map & ~PAGE_MASK))); 38 } 39 40 static int __init init_cpu_fullname(void) 41 { 42 int cpu; 43 44 if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) { 45 for (cpu = 0; cpu < NR_CPUS; cpu++) 46 __cpu_full_name[cpu] = loongson_sysconf.cpuname; 47 } 48 return 0; 49 } 50 arch_initcall(init_cpu_fullname); 51 52 static ssize_t boardinfo_show(struct kobject *kobj, 53 struct kobj_attribute *attr, char *buf) 54 { 55 return sprintf(buf, 56 "BIOS Information\n" 57 "Vendor\t\t\t: %s\n" 58 "Version\t\t\t: %s\n" 59 "ROM Size\t\t: %d KB\n" 60 "Release Date\t\t: %s\n\n" 61 "Board Information\n" 62 "Manufacturer\t\t: %s\n" 63 "Board Name\t\t: %s\n" 64 "Family\t\t\t: LOONGSON64\n\n", 65 b_info.bios_vendor, b_info.bios_version, 66 b_info.bios_size, b_info.bios_release_date, 67 b_info.board_vendor, b_info.board_name); 68 } 69 70 static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444, 71 boardinfo_show, NULL); 72 73 static int __init boardinfo_init(void) 74 { 75 struct kobject *loongson_kobj; 76 77 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj); 78 79 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr); 80 } 81 late_initcall(boardinfo_init); 82