arch/loongarch/kernel/env.c

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