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82cb2c1ad9
To make software license auditing simpler, use SPDX[0] license identifiers instead of duplicating the license text in every file. NOTE: Files that have been imported by FreeBSD have not been modified. [0]: https://spdx.org/ Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*
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* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __CONTEXT_H__
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#define __CONTEXT_H__
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/*******************************************************************************
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* Constants that allow assembler code to access members of and the 'regs'
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* structure at their correct offsets.
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******************************************************************************/
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#define CTX_REGS_OFFSET 0x0
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#define CTX_GPREG_R0 0x0
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#define CTX_GPREG_R1 0x4
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#define CTX_GPREG_R2 0x8
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#define CTX_GPREG_R3 0xC
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#define CTX_LR 0x10
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#define CTX_SCR 0x14
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#define CTX_SPSR 0x18
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#define CTX_NS_SCTLR 0x1C
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#define CTX_REGS_END 0x20
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#ifndef __ASSEMBLY__
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#include <cassert.h>
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#include <stdint.h>
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/*
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* Common constants to help define the 'cpu_context' structure and its
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* members below.
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*/
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#define WORD_SHIFT 2
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#define DEFINE_REG_STRUCT(name, num_regs) \
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typedef struct name { \
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uint32_t _regs[num_regs]; \
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} __aligned(8) name##_t
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/* Constants to determine the size of individual context structures */
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#define CTX_REG_ALL (CTX_REGS_END >> WORD_SHIFT)
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DEFINE_REG_STRUCT(regs, CTX_REG_ALL);
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#undef CTX_REG_ALL
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#define read_ctx_reg(ctx, offset) ((ctx)->_regs[offset >> WORD_SHIFT])
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#define write_ctx_reg(ctx, offset, val) (((ctx)->_regs[offset >> WORD_SHIFT]) \
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= val)
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typedef struct cpu_context {
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regs_t regs_ctx;
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} cpu_context_t;
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/* Macros to access members of the 'cpu_context_t' structure */
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#define get_regs_ctx(h) (&((cpu_context_t *) h)->regs_ctx)
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/*
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* Compile time assertions related to the 'cpu_context' structure to
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* ensure that the assembler and the compiler view of the offsets of
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* the structure members is the same.
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*/
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CASSERT(CTX_REGS_OFFSET == __builtin_offsetof(cpu_context_t, regs_ctx), \
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assert_core_context_regs_offset_mismatch);
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#endif /* __ASSEMBLY__ */
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#endif /* __CONTEXT_H__ */
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