139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/* 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
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* 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);
|
|
};
|
|
|
|
#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);
|
|
|
|
#endif
|