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88d4d957ed
Since commit 40cd01a9c324("efi/loongarch: libstub: remove dependency on
flattened DT"), we can parse the FDT from efi system table.
And now, LoongArch is coming to support booting with FDT, so we add the
relevant booting support as well as parameter parsing.
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
78 lines
2 KiB
C
78 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Author: Huacai Chen <chenhuacai@loongson.cn>
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/export.h>
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#include <linux/memblock.h>
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#include <asm/early_ioremap.h>
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#include <asm/bootinfo.h>
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#include <asm/loongson.h>
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#include <asm/setup.h>
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u64 efi_system_table;
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struct loongson_system_configuration loongson_sysconf;
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EXPORT_SYMBOL(loongson_sysconf);
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void __init init_environ(void)
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{
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int efi_boot = fw_arg0;
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char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE);
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if (efi_boot)
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set_bit(EFI_BOOT, &efi.flags);
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else
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clear_bit(EFI_BOOT, &efi.flags);
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strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
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strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE);
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early_memunmap(cmdline, COMMAND_LINE_SIZE);
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efi_system_table = fw_arg2;
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}
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static int __init init_cpu_fullname(void)
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{
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int cpu;
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if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
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for (cpu = 0; cpu < NR_CPUS; cpu++)
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__cpu_full_name[cpu] = loongson_sysconf.cpuname;
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}
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return 0;
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}
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arch_initcall(init_cpu_fullname);
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static ssize_t boardinfo_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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return sprintf(buf,
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"BIOS Information\n"
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"Vendor\t\t\t: %s\n"
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"Version\t\t\t: %s\n"
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"ROM Size\t\t: %d KB\n"
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"Release Date\t\t: %s\n\n"
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"Board Information\n"
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"Manufacturer\t\t: %s\n"
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"Board Name\t\t: %s\n"
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"Family\t\t\t: LOONGSON64\n\n",
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b_info.bios_vendor, b_info.bios_version,
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b_info.bios_size, b_info.bios_release_date,
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b_info.board_vendor, b_info.board_name);
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}
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static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444,
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boardinfo_show, NULL);
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static int __init boardinfo_init(void)
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{
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struct kobject *loongson_kobj;
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loongson_kobj = kobject_create_and_add("loongson", firmware_kobj);
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return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr);
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}
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late_initcall(boardinfo_init);
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