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/*
* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __CPU_DATA_H__
#define __CPU_DATA_H__
/* Offsets for the cpu_data structure */
#define CPU_DATA_CRASH_STACK_OFFSET 0x10
#define CPU_DATA_LOG2SIZE 6
#ifndef __ASSEMBLY__
#include <arch_helpers.h>
#include <platform_def.h>
#include <stdint.h>
/*******************************************************************************
* Function & variable prototypes
******************************************************************************/
/*******************************************************************************
* Cache of frequently used per-cpu data:
* Pointers to non-secure and secure security state contexts
* Address of the crash stack
* It is aligned to the cache line boundary to allow efficient concurrent
* manipulation of these pointers on different cpus
*
* TODO: Add other commonly used variables to this (tf_issues#90)
*
* The data structure and the _cpu_data accessors should not be used directly
* by components that have per-cpu members. The member access macros should be
* used for this.
******************************************************************************/
typedef struct cpu_data {
void *cpu_context[2];
uint64_t crash_stack;
} __aligned(CACHE_WRITEBACK_GRANULE) cpu_data_t;
struct cpu_data *_cpu_data_by_index(uint32_t cpu_index);
struct cpu_data *_cpu_data_by_mpidr(uint64_t mpidr);
/* Return the cpu_data structure for the current CPU. */
static inline struct cpu_data *_cpu_data(void)
{
return (cpu_data_t *)read_tpidr_el3();
}
/**************************************************************************
* APIs for initialising and accessing per-cpu data
*************************************************************************/
void init_cpu_data_ptr(void);
#define get_cpu_data(_m) _cpu_data()->_m
#define set_cpu_data(_m, _v) _cpu_data()->_m = _v
#define get_cpu_data_by_index(_ix, _m) _cpu_data_by_index(_ix)->_m
#define set_cpu_data_by_index(_ix, _m, _v) _cpu_data_by_index(_ix)->_m = _v
#define get_cpu_data_by_mpidr(_id, _m) _cpu_data_by_mpidr(_id)->_m
#define set_cpu_data_by_mpidr(_id, _m, _v) _cpu_data_by_mpidr(_id)->_m = _v
#endif /* __ASSEMBLY__ */
#endif /* __CPU_DATA_H__ */