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
cpu_x86_bind(struct udevice * dev)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
cpu_x86_get_vendor(struct udevice * dev,char * buf,int size)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
cpu_x86_get_desc(struct udevice * dev,char * buf,int size)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
cpu_x86_get_count(struct udevice * dev)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