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https://github.com/ARM-software/arm-trusted-firmware.git
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d5dfdeb65f
NOTE: __ASSEMBLY__ macro is now deprecated in favor of __ASSEMBLER__. All common C compilers predefine a macro called __ASSEMBLER__ when preprocessing a .S file. There is no reason for TF-A to define it's own __ASSEMBLY__ macro for this purpose instead. To unify code with the export headers (which use __ASSEMBLER__ to avoid one extra dependency), let's deprecate __ASSEMBLY__ and switch the code base over to the predefined standard. Change-Id: Id7d0ec8cf330195da80499c68562b65cb5ab7417 Signed-off-by: Julius Werner <jwerner@chromium.org>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* Copyright (c) 2016-2018, 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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#include <lib/utils_def.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 U(0x0)
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#define CTX_GPREG_R0 U(0x0)
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#define CTX_GPREG_R1 U(0x4)
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#define CTX_GPREG_R2 U(0x8)
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#define CTX_GPREG_R3 U(0xC)
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#define CTX_LR U(0x10)
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#define CTX_SCR U(0x14)
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#define CTX_SPSR U(0x18)
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#define CTX_NS_SCTLR U(0x1C)
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#define CTX_REGS_END U(0x20)
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#include <lib/cassert.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 U(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 /* __ASSEMBLER__ */
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#endif /* CONTEXT_H */
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