X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fcpu.h;h=be02a1671298950867c4366ec4bd4a98027c3fd2;hb=6d5d0c955e2ca035481bc133d453fccd065b80e8;hp=34c60bcbaa1d0edd814f1faec85f6b46a96780ff;hpb=11f4dc1583c387fbb46d473c942c4bcfe5af303e;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/cpu.h b/include/cpu.h
index 34c60bc..be02a16 100644
--- a/include/cpu.h
+++ b/include/cpu.h
@@ -1,29 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __CPU_H
 #define __CPU_H
 
+struct udevice;
+
 /**
- * struct cpu_platdata - platform data for a CPU
+ * struct cpu_plat - 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
+ * This can be accessed with dev_get_parent_plat() for any UCLASS_CPU
  * device.
- *
- * @cpu_id:	Platform-specific way of identifying the CPU.
  */
-struct cpu_platdata {
+struct cpu_plat {
 	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,
 };
@@ -33,10 +46,12 @@ enum {
  *
  * @cpu_freq:	Current CPU frequency in Hz
  * @features:	Flags for supported CPU features
+ * @address_width:	Width of the CPU address space in bits (e.g. 32)
  */
 struct cpu_info {
 	ulong cpu_freq;
 	ulong features;
+	uint address_width;
 };
 
 struct cpu_ops {
@@ -48,7 +63,7 @@ struct cpu_ops {
 	 * @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);
+	int (*get_desc)(const struct udevice *dev, char *buf, int size);
 
 	/**
 	 * get_info() - Get information about a CPU
@@ -57,28 +72,94 @@ struct cpu_ops {
 	 * @info:	Returns CPU info
 	 * @return 0 if OK, -ve on error
 	 */
-	int (*get_info)(struct udevice *dev, struct cpu_info *info);
+	int (*get_info)(const 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)(const 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)(const struct udevice *dev, char *buf, int size);
+
+	/**
+	 * is_current() - Check if the CPU that U-Boot is currently running from
+	 *
+	 * @dev:	Device to check (UCLASS_CPU)
+	 * @return 1 if the CPU that U-Boot is currently running from, 0
+	 *         if not.
+	 */
+	int (*is_current)(struct udevice *dev);
 };
 
 #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
+ *
+ * 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);
+int cpu_get_desc(const 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
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int cpu_get_info(const 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(const 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(const 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);
+
+/**
+ * cpu_is_current() - Check if the CPU that U-Boot is currently running from
+ *
+ * Return: 1 if yes, - 0 if not
+ */
+int cpu_is_current(struct udevice *cpu);
+
+/**
+ * cpu_get_current_dev() - Get CPU udevice for current CPU
+ *
+ * Return: udevice if OK, - NULL on error
  */
-int cpu_get_info(struct udevice *dev, struct cpu_info *info);
+struct udevice *cpu_get_current_dev(void);
 
 #endif