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caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
163 lines
4.1 KiB
C
163 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __CPU_H
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#define __CPU_H
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/**
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* struct cpu_platdata - platform data for a CPU
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* @cpu_id: Platform-specific way of identifying the CPU.
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* @ucode_version: Microcode version, if CPU_FEAT_UCODE is set
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* @device_id: Driver-defined device identifier
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* @family: DMTF CPU Family identifier
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* @id: DMTF CPU Processor identifier
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* @timebase_freq: the current frequency at which the cpu timer timebase
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* registers are updated (in Hz)
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*
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* This can be accessed with dev_get_parent_plat() for any UCLASS_CPU
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* device.
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*/
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struct cpu_platdata {
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int cpu_id;
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int ucode_version;
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ulong device_id;
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u16 family;
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u32 id[2];
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u32 timebase_freq;
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};
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/* CPU features - mostly just a placeholder for now */
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enum {
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CPU_FEAT_L1_CACHE = 0, /* Supports level 1 cache */
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CPU_FEAT_MMU = 1, /* Supports virtual memory */
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CPU_FEAT_UCODE = 2, /* Requires/uses microcode */
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CPU_FEAT_DEVICE_ID = 3, /* Provides a device ID */
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CPU_FEAT_COUNT,
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};
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/**
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* struct cpu_info - Information about a CPU
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*
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* @cpu_freq: Current CPU frequency in Hz
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* @features: Flags for supported CPU features
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* @address_width: Width of the CPU address space in bits (e.g. 32)
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*/
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struct cpu_info {
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ulong cpu_freq;
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ulong features;
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uint address_width;
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};
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struct cpu_ops {
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/**
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* get_desc() - Get a description string for a CPU
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*
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* @dev: Device to check (UCLASS_CPU)
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* @buf: Buffer to place string
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* @size: Size of string space
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* @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error
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*/
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int (*get_desc)(const struct udevice *dev, char *buf, int size);
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/**
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* get_info() - Get information about a CPU
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*
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* @dev: Device to check (UCLASS_CPU)
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* @info: Returns CPU info
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* @return 0 if OK, -ve on error
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*/
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int (*get_info)(const struct udevice *dev, struct cpu_info *info);
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/**
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* get_count() - Get number of CPUs
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*
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* @dev: Device to check (UCLASS_CPU)
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* @return CPU count if OK, -ve on error
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*/
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int (*get_count)(const struct udevice *dev);
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/**
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* get_vendor() - Get vendor name of a CPU
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*
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* @dev: Device to check (UCLASS_CPU)
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* @buf: Buffer to place string
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* @size: Size of string space
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* @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error
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*/
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int (*get_vendor)(const struct udevice *dev, char *buf, int size);
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/**
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* is_current() - Check if the CPU that U-Boot is currently running from
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*
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* @dev: Device to check (UCLASS_CPU)
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* @return 1 if the CPU that U-Boot is currently running from, 0
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* if not.
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*/
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int (*is_current)(struct udevice *dev);
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};
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#define cpu_get_ops(dev) ((struct cpu_ops *)(dev)->driver->ops)
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/**
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* cpu_get_desc() - Get a description string for a CPU
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* @dev: Device to check (UCLASS_CPU)
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* @buf: Buffer to place string
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* @size: Size of string space
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*
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* Return: 0 if OK, -ENOSPC if buffer is too small, other -ve on error
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*/
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int cpu_get_desc(const struct udevice *dev, char *buf, int size);
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/**
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* cpu_get_info() - Get information about a CPU
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* @dev: Device to check (UCLASS_CPU)
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* @info: Returns CPU info
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*
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* Return: 0 if OK, -ve on error
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*/
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int cpu_get_info(const struct udevice *dev, struct cpu_info *info);
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/**
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* cpu_get_count() - Get number of CPUs
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* @dev: Device to check (UCLASS_CPU)
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*
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* Return: CPU count if OK, -ve on error
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*/
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int cpu_get_count(const struct udevice *dev);
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/**
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* cpu_get_vendor() - Get vendor name of a CPU
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* @dev: Device to check (UCLASS_CPU)
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* @buf: Buffer to place string
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* @size: Size of string space
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*
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* Return: 0 if OK, -ENOSPC if buffer is too small, other -ve on error
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*/
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int cpu_get_vendor(const struct udevice *dev, char *buf, int size);
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/**
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* cpu_probe_all() - Probe all available CPUs
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*
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* Return: 0 if OK, -ve on error
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*/
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int cpu_probe_all(void);
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/**
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* cpu_is_current() - Check if the CPU that U-Boot is currently running from
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*
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* Return: 1 if yes, - 0 if not
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*/
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int cpu_is_current(struct udevice *cpu);
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/**
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* cpu_get_current_dev() - Get CPU udevice for current CPU
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*
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* Return: udevice if OK, - NULL on error
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*/
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struct udevice *cpu_get_current_dev(void);
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#endif
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