/* * 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 cpu_platdata - platform data for a CPU * * This can be accessed with dev_get_parent_platdata() for any UCLASS_CPU * device. * * @cpu_id: Platform-specific way of identifying the CPU. */ struct cpu_platdata { int cpu_id; }; /* 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_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); }; #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); #endif