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-rw-r--r--arch/loongarch/kernel/env.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/env.c b/arch/loongarch/kernel/env.c
new file mode 100644
index 0000000000..6b3bfb0092
--- /dev/null
+++ b/arch/loongarch/kernel/env.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Author: Huacai Chen <chenhuacai@loongson.cn>
+ *
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#include <linux/acpi.h>
+#include <linux/efi.h>
+#include <linux/export.h>
+#include <linux/memblock.h>
+#include <asm/early_ioremap.h>
+#include <asm/bootinfo.h>
+#include <asm/loongson.h>
+#include <asm/setup.h>
+
+u64 efi_system_table;
+struct loongson_system_configuration loongson_sysconf;
+EXPORT_SYMBOL(loongson_sysconf);
+
+void __init init_environ(void)
+{
+ int efi_boot = fw_arg0;
+ char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE);
+
+ if (efi_boot)
+ set_bit(EFI_BOOT, &efi.flags);
+ else
+ clear_bit(EFI_BOOT, &efi.flags);
+
+ strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
+ strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE);
+ early_memunmap(cmdline, COMMAND_LINE_SIZE);
+
+ efi_system_table = fw_arg2;
+}
+
+static int __init init_cpu_fullname(void)
+{
+ int cpu;
+
+ if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
+ for (cpu = 0; cpu < NR_CPUS; cpu++)
+ __cpu_full_name[cpu] = loongson_sysconf.cpuname;
+ }
+ return 0;
+}
+arch_initcall(init_cpu_fullname);
+
+static ssize_t boardinfo_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf,
+ "BIOS Information\n"
+ "Vendor\t\t\t: %s\n"
+ "Version\t\t\t: %s\n"
+ "ROM Size\t\t: %d KB\n"
+ "Release Date\t\t: %s\n\n"
+ "Board Information\n"
+ "Manufacturer\t\t: %s\n"
+ "Board Name\t\t: %s\n"
+ "Family\t\t\t: LOONGSON64\n\n",
+ b_info.bios_vendor, b_info.bios_version,
+ b_info.bios_size, b_info.bios_release_date,
+ b_info.board_vendor, b_info.board_name);
+}
+
+static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444,
+ boardinfo_show, NULL);
+
+static int __init boardinfo_init(void)
+{
+ struct kobject *loongson_kobj;
+
+ loongson_kobj = kobject_create_and_add("loongson", firmware_kobj);
+
+ return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr);
+}
+late_initcall(boardinfo_init);