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 u64 loongson_chipcfg[MAX_PACKAGES]; 21 u64 loongson_chiptemp[MAX_PACKAGES]; 22 u64 loongson_freqctrl[MAX_PACKAGES]; 23 unsigned long long smp_group[MAX_PACKAGES]; 24 25 static void __init register_addrs_set(u64 *registers, const u64 addr, int num) 26 { 27 u64 i; 28 29 for (i = 0; i < num; i++) { 30 *registers = (i << 44) | addr; 31 registers++; 32 } 33 } 34 35 void __init init_environ(void) 36 { 37 int efi_boot = fw_arg0; 38 struct efi_memory_map_data data; 39 void *fdt_ptr = early_memremap_ro(fw_arg1, SZ_64K); 40 41 if (efi_boot) 42 set_bit(EFI_BOOT, &efi.flags); 43 else 44 clear_bit(EFI_BOOT, &efi.flags); 45 46 early_init_dt_scan(fdt_ptr); 47 early_init_fdt_reserve_self(); 48 efi_system_table = efi_get_fdt_params(&data); 49 50 efi_memmap_init_early(&data); 51 memblock_reserve(data.phys_map & PAGE_MASK, 52 PAGE_ALIGN(data.size + (data.phys_map & ~PAGE_MASK))); 53 54 register_addrs_set(smp_group, TO_UNCACHE(0x1fe01000), 16); 55 register_addrs_set(loongson_chipcfg, TO_UNCACHE(0x1fe00180), 16); 56 register_addrs_set(loongson_chiptemp, TO_UNCACHE(0x1fe0019c), 16); 57 register_addrs_set(loongson_freqctrl, TO_UNCACHE(0x1fe001d0), 16); 58 } 59 60 static int __init init_cpu_fullname(void) 61 { 62 int cpu; 63 64 if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) { 65 for (cpu = 0; cpu < NR_CPUS; cpu++) 66 __cpu_full_name[cpu] = loongson_sysconf.cpuname; 67 } 68 return 0; 69 } 70 arch_initcall(init_cpu_fullname); 71 72 static ssize_t boardinfo_show(struct kobject *kobj, 73 struct kobj_attribute *attr, char *buf) 74 { 75 return sprintf(buf, 76 "BIOS Information\n" 77 "Vendor\t\t\t: %s\n" 78 "Version\t\t\t: %s\n" 79 "ROM Size\t\t: %d KB\n" 80 "Release Date\t\t: %s\n\n" 81 "Board Information\n" 82 "Manufacturer\t\t: %s\n" 83 "Board Name\t\t: %s\n" 84 "Family\t\t\t: LOONGSON64\n\n", 85 b_info.bios_vendor, b_info.bios_version, 86 b_info.bios_size, b_info.bios_release_date, 87 b_info.board_vendor, b_info.board_name); 88 } 89 90 static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444, 91 boardinfo_show, NULL); 92 93 static int __init boardinfo_init(void) 94 { 95 struct kobject *loongson_kobj; 96 97 loongson_kobj = kobject_create_and_add("loongson", firmware_kobj); 98 99 return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr); 100 } 101 late_initcall(boardinfo_init); 102