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 #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);