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 19 plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset, 20 "intel,apic-id", -1); 21 22 return 0; 23 } 24 25 int cpu_x86_get_desc(struct udevice *dev, char *buf, int size) 26 { 27 if (size < CPU_MAX_NAME_LEN) 28 return -ENOSPC; 29 30 cpu_get_name(buf); 31 32 return 0; 33 } 34 35 static int cpu_x86_get_count(struct udevice *dev) 36 { 37 int node, cpu; 38 int num = 0; 39 40 node = fdt_path_offset(gd->fdt_blob, "/cpus"); 41 if (node < 0) 42 return -ENOENT; 43 44 for (cpu = fdt_first_subnode(gd->fdt_blob, node); 45 cpu >= 0; 46 cpu = fdt_next_subnode(gd->fdt_blob, cpu)) { 47 const char *device_type; 48 49 device_type = fdt_getprop(gd->fdt_blob, cpu, 50 "device_type", NULL); 51 if (!device_type) 52 continue; 53 if (strcmp(device_type, "cpu") == 0) 54 num++; 55 } 56 57 return num; 58 } 59 60 static const struct cpu_ops cpu_x86_ops = { 61 .get_desc = cpu_x86_get_desc, 62 .get_count = cpu_x86_get_count, 63 }; 64 65 static const struct udevice_id cpu_x86_ids[] = { 66 { .compatible = "cpu-x86" }, 67 { } 68 }; 69 70 U_BOOT_DRIVER(cpu_x86_drv) = { 71 .name = "cpu_x86", 72 .id = UCLASS_CPU, 73 .of_match = cpu_x86_ids, 74 .bind = cpu_x86_bind, 75 .ops = &cpu_x86_ops, 76 }; 77