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, 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_desc(struct udevice *dev, char *buf, int size) 31 { 32 if (size < CPU_MAX_NAME_LEN) 33 return -ENOSPC; 34 35 cpu_get_name(buf); 36 37 return 0; 38 } 39 40 static int cpu_x86_get_count(struct udevice *dev) 41 { 42 int node, cpu; 43 int num = 0; 44 45 node = fdt_path_offset(gd->fdt_blob, "/cpus"); 46 if (node < 0) 47 return -ENOENT; 48 49 for (cpu = fdt_first_subnode(gd->fdt_blob, node); 50 cpu >= 0; 51 cpu = fdt_next_subnode(gd->fdt_blob, cpu)) { 52 const char *device_type; 53 54 device_type = fdt_getprop(gd->fdt_blob, cpu, 55 "device_type", NULL); 56 if (!device_type) 57 continue; 58 if (strcmp(device_type, "cpu") == 0) 59 num++; 60 } 61 62 return num; 63 } 64 65 static const struct cpu_ops cpu_x86_ops = { 66 .get_desc = cpu_x86_get_desc, 67 .get_count = cpu_x86_get_count, 68 }; 69 70 static const struct udevice_id cpu_x86_ids[] = { 71 { .compatible = "cpu-x86" }, 72 { } 73 }; 74 75 U_BOOT_DRIVER(cpu_x86_drv) = { 76 .name = "cpu_x86", 77 .id = UCLASS_CPU, 78 .of_match = cpu_x86_ids, 79 .bind = cpu_x86_bind, 80 .ops = &cpu_x86_ops, 81 }; 82