1 /* 2 * Copyright (c) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __CPU_H 9 #define __CPU_H 10 11 /** 12 * struct cpu_platdata - platform data for a CPU 13 * 14 * This can be accessed with dev_get_parent_platdata() for any UCLASS_CPU 15 * device. 16 * 17 * @cpu_id: Platform-specific way of identifying the CPU. 18 */ 19 struct cpu_platdata { 20 int cpu_id; 21 }; 22 23 /* CPU features - mostly just a placeholder for now */ 24 enum { 25 CPU_FEAT_L1_CACHE = 0, /* Supports level 1 cache */ 26 CPU_FEAT_MMU = 1, /* Supports virtual memory */ 27 28 CPU_FEAT_COUNT, 29 }; 30 31 /** 32 * struct cpu_info - Information about a CPU 33 * 34 * @cpu_freq: Current CPU frequency in Hz 35 * @features: Flags for supported CPU features 36 */ 37 struct cpu_info { 38 ulong cpu_freq; 39 ulong features; 40 }; 41 42 struct cpu_ops { 43 /** 44 * get_desc() - Get a description string for a CPU 45 * 46 * @dev: Device to check (UCLASS_CPU) 47 * @buf: Buffer to place string 48 * @size: Size of string space 49 * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error 50 */ 51 int (*get_desc)(struct udevice *dev, char *buf, int size); 52 53 /** 54 * get_info() - Get information about a CPU 55 * 56 * @dev: Device to check (UCLASS_CPU) 57 * @info: Returns CPU info 58 * @return 0 if OK, -ve on error 59 */ 60 int (*get_info)(struct udevice *dev, struct cpu_info *info); 61 }; 62 63 #define cpu_get_ops(dev) ((struct cpu_ops *)(dev)->driver->ops) 64 65 /** 66 * cpu_get_desc() - Get a description string for a CPU 67 * 68 * @dev: Device to check (UCLASS_CPU) 69 * @buf: Buffer to place string 70 * @size: Size of string space 71 * @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error 72 */ 73 int cpu_get_desc(struct udevice *dev, char *buf, int size); 74 75 /** 76 * cpu_get_info() - Get information about a CPU 77 * 78 * @dev: Device to check (UCLASS_CPU) 79 * @info: Returns CPU info 80 * @return 0 if OK, -ve on error 81 */ 82 int cpu_get_info(struct udevice *dev, struct cpu_info *info); 83 84 #endif 85