1 files changed, 138 insertions, 0 deletions
diff --git a/include/cpu.h b/include/cpu.h
new file mode 100644
index 0000000..28dd48f
--- /dev/null
+++ b/include/cpu.h
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __CPU_H
+#define __CPU_H
+
+/**
+ * struct cpu_platdata - platform data for a CPU
+ * @cpu_id:	   Platform-specific way of identifying the CPU.
+ * @ucode_version: Microcode version, if CPU_FEAT_UCODE is set
+ * @device_id:     Driver-defined device identifier
+ * @family:        DMTF CPU Family identifier
+ * @id:            DMTF CPU Processor identifier
+ * @timebase_freq: the current frequency at which the cpu timer timebase
+ *		   registers are updated (in Hz)
+ *
+ * This can be accessed with dev_get_parent_platdata() for any UCLASS_CPU
+ * device.
+ */
+struct cpu_platdata {
+	int cpu_id;
+	int ucode_version;
+	ulong device_id;
+	u16 family;
+	u32 id[2];
+	u32 timebase_freq;
+};
+
+/* CPU features - mostly just a placeholder for now */
+enum {
+	CPU_FEAT_L1_CACHE	= 0,	/* Supports level 1 cache */
+	CPU_FEAT_MMU		= 1,	/* Supports virtual memory */
+	CPU_FEAT_UCODE		= 2,	/* Requires/uses microcode */
+	CPU_FEAT_DEVICE_ID	= 3,	/* Provides a device ID */
+
+	CPU_FEAT_COUNT,
+};
+
+/**
+ * struct cpu_info - Information about a CPU
+ *
+ * @cpu_freq:	Current CPU frequency in Hz
+ * @features:	Flags for supported CPU features
+ */
+struct cpu_info {
+	ulong cpu_freq;
+	ulong features;
+};
+
+struct cpu_ops {
+	/**
+	 * get_desc() - Get a description string for a CPU
+	 *
+	 * @dev:	Device to check (UCLASS_CPU)
+	 * @buf:	Buffer to place string
+	 * @size:	Size of string space
+	 * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error
+	 */
+	int (*get_desc)(struct udevice *dev, char *buf, int size);
+
+	/**
+	 * get_info() - Get information about a CPU
+	 *
+	 * @dev:	Device to check (UCLASS_CPU)
+	 * @info:	Returns CPU info
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*get_info)(struct udevice *dev, struct cpu_info *info);
+
+	/**
+	 * get_count() - Get number of CPUs
+	 *
+	 * @dev:	Device to check (UCLASS_CPU)
+	 * @return CPU count if OK, -ve on error
+	 */
+	int (*get_count)(struct udevice *dev);
+
+	/**
+	 * get_vendor() - Get vendor name of a CPU
+	 *
+	 * @dev:	Device to check (UCLASS_CPU)
+	 * @buf:	Buffer to place string
+	 * @size:	Size of string space
+	 * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error
+	 */
+	int (*get_vendor)(struct udevice *dev, char *buf, int size);
+};
+
+#define cpu_get_ops(dev)        ((struct cpu_ops *)(dev)->driver->ops)
+
+/**
+ * cpu_get_desc() - Get a description string for a CPU
+ * @dev:	Device to check (UCLASS_CPU)
+ * @buf:	Buffer to place string
+ * @size:	Size of string space
+ *
+ * Return: 0 if OK, -ENOSPC if buffer is too small, other -ve on error
+ */
+int cpu_get_desc(struct udevice *dev, char *buf, int size);
+
+/**
+ * cpu_get_info() - Get information about a CPU
+ * @dev:	Device to check (UCLASS_CPU)
+ * @info:	Returns CPU info
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int cpu_get_info(struct udevice *dev, struct cpu_info *info);
+
+/**
+ * cpu_get_count() - Get number of CPUs
+ * @dev:	Device to check (UCLASS_CPU)
+ *
+ * Return: CPU count if OK, -ve on error
+ */
+int cpu_get_count(struct udevice *dev);
+
+/**
+ * cpu_get_vendor() - Get vendor name of a CPU
+ * @dev:	Device to check (UCLASS_CPU)
+ * @buf:	Buffer to place string
+ * @size:	Size of string space
+ *
+ * Return: 0 if OK, -ENOSPC if buffer is too small, other -ve on error
+ */
+int cpu_get_vendor(struct udevice *dev, char *buf, int size);
+
+/**
+ * cpu_probe_all() - Probe all available CPUs
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int cpu_probe_all(void);
+
+#endif