mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-31 12:08:19 +00:00
780bfdd3c7
Introduce a new method 'get_count' in the UCLASS_CPU ops to get the number of CPUs in the system. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
|
|
* 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
|