1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> 4 */ 5 6 #include <common.h> 7 #include <cpu.h> 8 #include <dm.h> 9 #include <errno.h> 10 #include <asm/cpu.h> 11 12 DECLARE_GLOBAL_DATA_PTR; 13 14 int cpu_x86_bind(struct udevice *dev) 15 { 16 struct cpu_platdata *plat = dev_get_parent_platdata(dev); 17 struct cpuid_result res; 18 19 plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), 20 "intel,apic-id", -1); 21 plat->family = gd->arch.x86; 22 res = cpuid(1); 23 plat->id[0] = res.eax; 24 plat->id[1] = res.edx; 25 26 return 0; 27 } 28 29 int cpu_x86_get_vendor(struct udevice *dev, char *buf, int size) 30 { 31 const char *vendor = cpu_vendor_name(gd->arch.x86_vendor); 32 33 if (size < (strlen(vendor) + 1)) 34 return -ENOSPC; 35 36 strcpy(buf, vendor); 37 38 return 0; 39 } 40 41 int cpu_x86_get_desc(struct udevice *dev, char *buf, int size) 42 { 43 char *ptr; 44 45 if (size < CPU_MAX_NAME_LEN) 46 return -ENOSPC; 47 48 ptr = cpu_get_name(buf); 49 if (ptr != buf) 50 strcpy(buf, ptr); 51 52 return 0; 53 } 54 55 static int cpu_x86_get_count(struct udevice *dev) 56 { 57 int node, cpu; 58 int num = 0; 59 60 node = fdt_path_offset(gd->fdt_blob, "/cpus"); 61 if (node < 0) 62 return -ENOENT; 63 64 for (cpu = fdt_first_subnode(gd->fdt_blob, node); 65 cpu >= 0; 66 cpu = fdt_next_subnode(gd->fdt_blob, cpu)) { 67 const char *device_type; 68 69 device_type = fdt_getprop(gd->fdt_blob, cpu, 70 "device_type", NULL); 71 if (!device_type) 72 continue; 73 if (strcmp(device_type, "cpu") == 0) 74 num++; 75 } 76 77 return num; 78 } 79 80 static const struct cpu_ops cpu_x86_ops = { 81 .get_desc = cpu_x86_get_desc, 82 .get_count = cpu_x86_get_count, 83 .get_vendor = cpu_x86_get_vendor, 84 }; 85 86 static const struct udevice_id cpu_x86_ids[] = { 87 { .compatible = "cpu-x86" }, 88 { } 89 }; 90 91 U_BOOT_DRIVER(cpu_x86_drv) = { 92 .name = "cpu_x86", 93 .id = UCLASS_CPU, 94 .of_match = cpu_x86_ids, 95 .bind = cpu_x86_bind, 96 .ops = &cpu_x86_ops, 97 .flags = DM_FLAG_PRE_RELOC, 98 }; 99