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- /* 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
- * @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 {
- /**
- * 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);
- /**
- * 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
- */
- 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);
- /**
- * 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
- */
- struct udevice *cpu_get_current_dev(void);
- #endif
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