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