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/*
* Copyright (c) 2014-2016, 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_BUF_OFFSET 0x18
#if CRASH_REPORTING
#define CPU_DATA_LOG2SIZE 7
#else
#define CPU_DATA_LOG2SIZE 6
#endif
/* need enough space in crash buffer to save 8 registers */
#define CPU_DATA_CRASH_BUF_SIZE 64
#define CPU_DATA_CPU_OPS_PTR 0x10
#ifndef __ASSEMBLY__
#include <arch_helpers.h>
#include <cassert.h>
#include <platform_def.h>
#include <psci.h>
#include <stdint.h>
/* Offsets for the cpu_data structure */
#define CPU_DATA_PSCI_LOCK_OFFSET __builtin_offsetof\
(cpu_data_t, psci_svc_cpu_data.pcpu_bakery_info)
#if PLAT_PCPU_DATA_SIZE
#define CPU_DATA_PLAT_PCPU_OFFSET __builtin_offsetof\
(cpu_data_t, platform_cpu_data)
#endif
/*******************************************************************************
* 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];
uintptr_t cpu_ops_ptr;
#if CRASH_REPORTING
u_register_t crash_buf[CPU_DATA_CRASH_BUF_SIZE >> 3];
#endif
struct psci_cpu_data psci_svc_cpu_data;
#if PLAT_PCPU_DATA_SIZE
uint8_t platform_cpu_data[PLAT_PCPU_DATA_SIZE];
#endif
} __aligned(CACHE_WRITEBACK_GRANULE) cpu_data_t;
#if CRASH_REPORTING
/* verify assembler offsets match data structures */
CASSERT(CPU_DATA_CRASH_BUF_OFFSET == __builtin_offsetof
(cpu_data_t, crash_buf),
assert_cpu_data_crash_stack_offset_mismatch);
#endif
CASSERT((1 << CPU_DATA_LOG2SIZE) == sizeof(cpu_data_t),
assert_cpu_data_log2size_mismatch);
CASSERT(CPU_DATA_CPU_OPS_PTR == __builtin_offsetof
(cpu_data_t, cpu_ops_ptr),
assert_cpu_data_cpu_ops_ptr_offset_mismatch);
struct cpu_data *_cpu_data_by_index(uint32_t cpu_index);
/* 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);
void init_cpu_ops(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 flush_cpu_data(_m) flush_dcache_range((uintptr_t) \
&(_cpu_data()->_m), \
sizeof(_cpu_data()->_m))
#define inv_cpu_data(_m) inv_dcache_range((uintptr_t) \
&(_cpu_data()->_m), \
sizeof(_cpu_data()->_m))
#define flush_cpu_data_by_index(_ix, _m) \
flush_dcache_range((uintptr_t) \
&(_cpu_data_by_index(_ix)->_m), \
sizeof(_cpu_data_by_index(_ix)->_m))
#endif /* __ASSEMBLY__ */
#endif /* __CPU_DATA_H__ */
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