GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/x86/cpu/cpu_x86.c

@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#include <common.h>
+#include <cpu.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/cpu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int cpu_x86_bind(struct udevice *dev)
+{
+	struct cpu_platdata *plat = dev_get_parent_platdata(dev);
+	struct cpuid_result res;
+
+	plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
+				      "intel,apic-id", -1);
+	plat->family = gd->arch.x86;
+	res = cpuid(1);
+	plat->id[0] = res.eax;
+	plat->id[1] = res.edx;
+
+	return 0;
+}
+
+int cpu_x86_get_vendor(struct udevice *dev, char *buf, int size)
+{
+	const char *vendor = cpu_vendor_name(gd->arch.x86_vendor);
+
+	if (size < (strlen(vendor) + 1))
+		return -ENOSPC;
+
+	strcpy(buf, vendor);
+
+	return 0;
+}
+
+int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
+{
+	char *ptr;
+
+	if (size < CPU_MAX_NAME_LEN)
+		return -ENOSPC;
+
+	ptr = cpu_get_name(buf);
+	if (ptr != buf)
+		strcpy(buf, ptr);
+
+	return 0;
+}
+
+static int cpu_x86_get_count(struct udevice *dev)
+{
+	int node, cpu;
+	int num = 0;
+
+	node = fdt_path_offset(gd->fdt_blob, "/cpus");
+	if (node < 0)
+		return -ENOENT;
+
+	for (cpu = fdt_first_subnode(gd->fdt_blob, node);
+	     cpu >= 0;
+	     cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
+		const char *device_type;
+
+		device_type = fdt_getprop(gd->fdt_blob, cpu,
+					  "device_type", NULL);
+		if (!device_type)
+			continue;
+		if (strcmp(device_type, "cpu") == 0)
+			num++;
+	}
+
+	return num;
+}
+
+static const struct cpu_ops cpu_x86_ops = {
+	.get_desc	= cpu_x86_get_desc,
+	.get_count	= cpu_x86_get_count,
+	.get_vendor	= cpu_x86_get_vendor,
+};
+
+static const struct udevice_id cpu_x86_ids[] = {
+	{ .compatible = "cpu-x86" },
+	{ }
+};
+
+U_BOOT_DRIVER(cpu_x86_drv) = {
+	.name		= "cpu_x86",
+	.id		= UCLASS_CPU,
+	.of_match	= cpu_x86_ids,
+	.bind		= cpu_x86_bind,
+	.ops		= &cpu_x86_ops,
+	.flags		= DM_FLAG_PRE_RELOC,
+};