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/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __CONTEXT_H__
#define __CONTEXT_H__
/*******************************************************************************
* Constants that allow assembler code to access members of and the 'regs'
* structure at their correct offsets.
******************************************************************************/
#define CTX_REGS_OFFSET 0x0
#define CTX_GPREG_R0 0x0
#define CTX_GPREG_R1 0x4
#define CTX_GPREG_R2 0x8
#define CTX_GPREG_R3 0xC
#define CTX_LR 0x10
#define CTX_SCR 0x14
#define CTX_SPSR 0x18
#define CTX_NS_SCTLR 0x1C
#define CTX_REGS_END 0x20
#ifndef __ASSEMBLY__
#include <cassert.h>
#include <stdint.h>
/*
* Common constants to help define the 'cpu_context' structure and its
* members below.
*/
#define WORD_SHIFT 2
#define DEFINE_REG_STRUCT(name, num_regs) \
typedef struct name { \
uint32_t _regs[num_regs]; \
} __aligned(8) name##_t
/* Constants to determine the size of individual context structures */
#define CTX_REG_ALL (CTX_REGS_END >> WORD_SHIFT)
DEFINE_REG_STRUCT(regs, CTX_REG_ALL);
#undef CTX_REG_ALL
#define read_ctx_reg(ctx, offset) ((ctx)->_regs[offset >> WORD_SHIFT])
#define write_ctx_reg(ctx, offset, val) (((ctx)->_regs[offset >> WORD_SHIFT]) \
= val)
typedef struct cpu_context {
regs_t regs_ctx;
} cpu_context_t;
/* Macros to access members of the 'cpu_context_t' structure */
#define get_regs_ctx(h) (&((cpu_context_t *) h)->regs_ctx)
/*
* Compile time assertions related to the 'cpu_context' structure to
* ensure that the assembler and the compiler view of the offsets of
* the structure members is the same.
*/
CASSERT(CTX_REGS_OFFSET == __builtin_offsetof(cpu_context_t, regs_ctx), \
assert_core_context_regs_offset_mismatch);
#endif /* __ASSEMBLY__ */
#endif /* __CONTEXT_H__ */
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