include/lib/el3_runtime/aarch64/context.h - imx-atf - Git at Google

 /*
  * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #ifndef __CONTEXT_H__
 #define __CONTEXT_H__

 #include <utils_def.h>

 /*******************************************************************************
  * Constants that allow assembler code to access members of and the 'gp_regs'
  * structure at their correct offsets.
  ******************************************************************************/
 #define CTX_GPREGS_OFFSET	U(0x0)
 #define CTX_GPREG_X0		U(0x0)
 #define CTX_GPREG_X1		U(0x8)
 #define CTX_GPREG_X2		U(0x10)
 #define CTX_GPREG_X3		U(0x18)
 #define CTX_GPREG_X4		U(0x20)
 #define CTX_GPREG_X5		U(0x28)
 #define CTX_GPREG_X6		U(0x30)
 #define CTX_GPREG_X7		U(0x38)
 #define CTX_GPREG_X8		U(0x40)
 #define CTX_GPREG_X9		U(0x48)
 #define CTX_GPREG_X10		U(0x50)
 #define CTX_GPREG_X11		U(0x58)
 #define CTX_GPREG_X12		U(0x60)
 #define CTX_GPREG_X13		U(0x68)
 #define CTX_GPREG_X14		U(0x70)
 #define CTX_GPREG_X15		U(0x78)
 #define CTX_GPREG_X16		U(0x80)
 #define CTX_GPREG_X17		U(0x88)
 #define CTX_GPREG_X18		U(0x90)
 #define CTX_GPREG_X19		U(0x98)
 #define CTX_GPREG_X20		U(0xa0)
 #define CTX_GPREG_X21		U(0xa8)
 #define CTX_GPREG_X22		U(0xb0)
 #define CTX_GPREG_X23		U(0xb8)
 #define CTX_GPREG_X24		U(0xc0)
 #define CTX_GPREG_X25		U(0xc8)
 #define CTX_GPREG_X26		U(0xd0)
 #define CTX_GPREG_X27		U(0xd8)
 #define CTX_GPREG_X28		U(0xe0)
 #define CTX_GPREG_X29		U(0xe8)
 #define CTX_GPREG_LR		U(0xf0)
 #define CTX_GPREG_SP_EL0	U(0xf8)
 #define CTX_GPREGS_END		U(0x100)

 /*******************************************************************************
  * Constants that allow assembler code to access members of and the 'el3_state'
  * structure at their correct offsets. Note that some of the registers are only
  * 32-bits wide but are stored as 64-bit values for convenience
  ******************************************************************************/
 #define CTX_EL3STATE_OFFSET	(CTX_GPREGS_OFFSET + CTX_GPREGS_END)
 #define CTX_SCR_EL3		U(0x0)
 #define CTX_ESR_EL3		U(0x8)
 #define CTX_RUNTIME_SP		U(0x10)
 #define CTX_SPSR_EL3		U(0x18)
 #define CTX_ELR_EL3		U(0x20)
 #define CTX_UNUSED		U(0x28)
 #define CTX_EL3STATE_END	U(0x30)

 /*******************************************************************************
  * Constants that allow assembler code to access members of and the
  * 'el1_sys_regs' structure at their correct offsets. Note that some of the
  * registers are only 32-bits wide but are stored as 64-bit values for
  * convenience
  ******************************************************************************/
 #define CTX_SYSREGS_OFFSET	(CTX_EL3STATE_OFFSET + CTX_EL3STATE_END)
 #define CTX_SPSR_EL1		U(0x0)
 #define CTX_ELR_EL1		U(0x8)
 #define CTX_SCTLR_EL1		U(0x10)
 #define CTX_ACTLR_EL1		U(0x18)
 #define CTX_CPACR_EL1		U(0x20)
 #define CTX_CSSELR_EL1		U(0x28)
 #define CTX_SP_EL1		U(0x30)
 #define CTX_ESR_EL1		U(0x38)
 #define CTX_TTBR0_EL1		U(0x40)
 #define CTX_TTBR1_EL1		U(0x48)
 #define CTX_MAIR_EL1		U(0x50)
 #define CTX_AMAIR_EL1		U(0x58)
 #define CTX_TCR_EL1		U(0x60)
 #define CTX_TPIDR_EL1		U(0x68)
 #define CTX_TPIDR_EL0		U(0x70)
 #define CTX_TPIDRRO_EL0		U(0x78)
 #define CTX_PAR_EL1		U(0x80)
 #define CTX_FAR_EL1		U(0x88)
 #define CTX_AFSR0_EL1		U(0x90)
 #define CTX_AFSR1_EL1		U(0x98)
 #define CTX_CONTEXTIDR_EL1	U(0xa0)
 #define CTX_VBAR_EL1		U(0xa8)
 #define CTX_PMCR_EL0		U(0xb0)

 /*
  * If the platform is AArch64-only, there is no need to save and restore these
  * AArch32 registers.
  */
 #if CTX_INCLUDE_AARCH32_REGS
 #define CTX_SPSR_ABT		U(0xc0)  /* Align to the next 16 byte boundary */
 #define CTX_SPSR_UND		U(0xc8)
 #define CTX_SPSR_IRQ		U(0xd0)
 #define CTX_SPSR_FIQ		U(0xd8)
 #define CTX_DACR32_EL2		U(0xe0)
 #define CTX_IFSR32_EL2		U(0xe8)
 #define CTX_TIMER_SYSREGS_OFF	U(0xf0) /* Align to the next 16 byte boundary */
 #else
 #define CTX_TIMER_SYSREGS_OFF	U(0xc0)  /* Align to the next 16 byte boundary */
 #endif /* __CTX_INCLUDE_AARCH32_REGS__ */

 /*
  * If the timer registers aren't saved and restored, we don't have to reserve
  * space for them in the context
  */
 #if NS_TIMER_SWITCH
 #define CTX_CNTP_CTL_EL0	(CTX_TIMER_SYSREGS_OFF + U(0x0))
 #define CTX_CNTP_CVAL_EL0	(CTX_TIMER_SYSREGS_OFF + U(0x8))
 #define CTX_CNTV_CTL_EL0	(CTX_TIMER_SYSREGS_OFF + U(0x10))
 #define CTX_CNTV_CVAL_EL0	(CTX_TIMER_SYSREGS_OFF + U(0x18))
 #define CTX_CNTKCTL_EL1		(CTX_TIMER_SYSREGS_OFF + U(0x20))
 #define CTX_SYSREGS_END		(CTX_TIMER_SYSREGS_OFF + U(0x30)) /* Align to the next 16 byte boundary */
 #else
 #define CTX_SYSREGS_END		CTX_TIMER_SYSREGS_OFF
 #endif /* __NS_TIMER_SWITCH__ */

 /*******************************************************************************
  * Constants that allow assembler code to access members of and the 'fp_regs'
  * structure at their correct offsets.
  ******************************************************************************/
 #define CTX_FPREGS_OFFSET	(CTX_SYSREGS_OFFSET + CTX_SYSREGS_END)
 #if CTX_INCLUDE_FPREGS
 #define CTX_FP_Q0		U(0x0)
 #define CTX_FP_Q1		U(0x10)
 #define CTX_FP_Q2		U(0x20)
 #define CTX_FP_Q3		U(0x30)
 #define CTX_FP_Q4		U(0x40)
 #define CTX_FP_Q5		U(0x50)
 #define CTX_FP_Q6		U(0x60)
 #define CTX_FP_Q7		U(0x70)
 #define CTX_FP_Q8		U(0x80)
 #define CTX_FP_Q9		U(0x90)
 #define CTX_FP_Q10		U(0xa0)
 #define CTX_FP_Q11		U(0xb0)
 #define CTX_FP_Q12		U(0xc0)
 #define CTX_FP_Q13		U(0xd0)
 #define CTX_FP_Q14		U(0xe0)
 #define CTX_FP_Q15		U(0xf0)
 #define CTX_FP_Q16		U(0x100)
 #define CTX_FP_Q17		U(0x110)
 #define CTX_FP_Q18		U(0x120)
 #define CTX_FP_Q19		U(0x130)
 #define CTX_FP_Q20		U(0x140)
 #define CTX_FP_Q21		U(0x150)
 #define CTX_FP_Q22		U(0x160)
 #define CTX_FP_Q23		U(0x170)
 #define CTX_FP_Q24		U(0x180)
 #define CTX_FP_Q25		U(0x190)
 #define CTX_FP_Q26		U(0x1a0)
 #define CTX_FP_Q27		U(0x1b0)
 #define CTX_FP_Q28		U(0x1c0)
 #define CTX_FP_Q29		U(0x1d0)
 #define CTX_FP_Q30		U(0x1e0)
 #define CTX_FP_Q31		U(0x1f0)
 #define CTX_FP_FPSR		U(0x200)
 #define CTX_FP_FPCR		U(0x208)
 #if CTX_INCLUDE_AARCH32_REGS
 #define CTX_FP_FPEXC32_EL2	U(0x210)
 #define CTX_FPREGS_END		U(0x220) /* Align to the next 16 byte boundary */
 #else
 #define CTX_FPREGS_END		U(0x210) /* Align to the next 16 byte boundary */
 #endif
 #else
 #define CTX_FPREGS_END		U(0)
 #endif

 #define CTX_CVE_2018_3639_OFFSET	(CTX_FPREGS_OFFSET + CTX_FPREGS_END)
 #define CTX_CVE_2018_3639_DISABLE	U(0)
 #define CTX_CVE_2018_3639_END		U(0x10) /* Align to the next 16 byte boundary */

 #ifndef __ASSEMBLY__

 #include <cassert.h>
 #include <platform_def.h>	/* for CACHE_WRITEBACK_GRANULE */
 #include <stdint.h>

 /*
  * Common constants to help define the 'cpu_context' structure and its
  * members below.
  */
 #define DWORD_SHIFT		U(3)
 #define DEFINE_REG_STRUCT(name, num_regs)	\
 	typedef struct name {			\
 		uint64_t _regs[num_regs];	\
 	}  __aligned(16) name##_t

 /* Constants to determine the size of individual context structures */
 #define CTX_GPREG_ALL		(CTX_GPREGS_END >> DWORD_SHIFT)
 #define CTX_SYSREG_ALL		(CTX_SYSREGS_END >> DWORD_SHIFT)
 #if CTX_INCLUDE_FPREGS
 #define CTX_FPREG_ALL		(CTX_FPREGS_END >> DWORD_SHIFT)
 #endif
 #define CTX_EL3STATE_ALL	(CTX_EL3STATE_END >> DWORD_SHIFT)
 #define CTX_CVE_2018_3639_ALL	(CTX_CVE_2018_3639_END >> DWORD_SHIFT)

 /*
  * AArch64 general purpose register context structure. Usually x0-x18,
  * lr are saved as the compiler is expected to preserve the remaining
  * callee saved registers if used by the C runtime and the assembler
  * does not touch the remaining. But in case of world switch during
  * exception handling, we need to save the callee registers too.
  */
 DEFINE_REG_STRUCT(gp_regs, CTX_GPREG_ALL);

 /*
  * AArch64 EL1 system register context structure for preserving the
  * architectural state during switches from one security state to
  * another in EL1.
  */
 DEFINE_REG_STRUCT(el1_sys_regs, CTX_SYSREG_ALL);

 /*
  * AArch64 floating point register context structure for preserving
  * the floating point state during switches from one security state to
  * another.
  */
 #if CTX_INCLUDE_FPREGS
 DEFINE_REG_STRUCT(fp_regs, CTX_FPREG_ALL);
 #endif

 /*
  * Miscellaneous registers used by EL3 firmware to maintain its state
  * across exception entries and exits
  */
 DEFINE_REG_STRUCT(el3_state, CTX_EL3STATE_ALL);

 /* Function pointer used by CVE-2018-3639 dynamic mitigation */
 DEFINE_REG_STRUCT(cve_2018_3639, CTX_CVE_2018_3639_ALL);

 /*
  * Macros to access members of any of the above structures using their
  * offsets
  */
 #define read_ctx_reg(ctx, offset)	((ctx)->_regs[(offset) >> DWORD_SHIFT])
 #define write_ctx_reg(ctx, offset, val)	(((ctx)->_regs[(offset) >> DWORD_SHIFT]) \
 					 = (uint64_t) (val))

 /*
  * Top-level context structure which is used by EL3 firmware to
  * preserve the state of a core at EL1 in one of the two security
  * states and save enough EL3 meta data to be able to return to that
  * EL and security state. The context management library will be used
  * to ensure that SP_EL3 always points to an instance of this
  * structure at exception entry and exit. Each instance will
  * correspond to either the secure or the non-secure state.
  */
 typedef struct cpu_context {
 	gp_regs_t gpregs_ctx;
 	el3_state_t el3state_ctx;
 	el1_sys_regs_t sysregs_ctx;
 #if CTX_INCLUDE_FPREGS
 	fp_regs_t fpregs_ctx;
 #endif
 	cve_2018_3639_t cve_2018_3639_ctx;
 } cpu_context_t;

 /* Macros to access members of the 'cpu_context_t' structure */
 #define get_el3state_ctx(h)	(&((cpu_context_t *) h)->el3state_ctx)
 #if CTX_INCLUDE_FPREGS
 #define get_fpregs_ctx(h)	(&((cpu_context_t *) h)->fpregs_ctx)
 #endif
 #define get_sysregs_ctx(h)	(&((cpu_context_t *) h)->sysregs_ctx)
 #define get_gpregs_ctx(h)	(&((cpu_context_t *) h)->gpregs_ctx)
 #define get_cve_2018_3639_ctx(h)	(&((cpu_context_t *) h)->cve_2018_3639_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_GPREGS_OFFSET == __builtin_offsetof(cpu_context_t, gpregs_ctx), \
 	assert_core_context_gp_offset_mismatch);
 CASSERT(CTX_SYSREGS_OFFSET == __builtin_offsetof(cpu_context_t, sysregs_ctx), \
 	assert_core_context_sys_offset_mismatch);
 #if CTX_INCLUDE_FPREGS
 CASSERT(CTX_FPREGS_OFFSET == __builtin_offsetof(cpu_context_t, fpregs_ctx), \
 	assert_core_context_fp_offset_mismatch);
 #endif
 CASSERT(CTX_EL3STATE_OFFSET == __builtin_offsetof(cpu_context_t, el3state_ctx), \
 	assert_core_context_el3state_offset_mismatch);
 CASSERT(CTX_CVE_2018_3639_OFFSET == __builtin_offsetof(cpu_context_t, cve_2018_3639_ctx), \
 	assert_core_context_cve_2018_3639_offset_mismatch);

 /*
  * Helper macro to set the general purpose registers that correspond to
  * parameters in an aapcs_64 call i.e. x0-x7
  */
 #define set_aapcs_args0(ctx, x0)				do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X0, x0);	\
 	} while (0)
 #define set_aapcs_args1(ctx, x0, x1)				do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X1, x1);	\
 		set_aapcs_args0(ctx, x0);				\
 	} while (0)
 #define set_aapcs_args2(ctx, x0, x1, x2)			do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X2, x2);	\
 		set_aapcs_args1(ctx, x0, x1);				\
 	} while (0)
 #define set_aapcs_args3(ctx, x0, x1, x2, x3)			do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X3, x3);	\
 		set_aapcs_args2(ctx, x0, x1, x2);			\
 	} while (0)
 #define set_aapcs_args4(ctx, x0, x1, x2, x3, x4)		do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X4, x4);	\
 		set_aapcs_args3(ctx, x0, x1, x2, x3);			\
 	} while (0)
 #define set_aapcs_args5(ctx, x0, x1, x2, x3, x4, x5)		do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X5, x5);	\
 		set_aapcs_args4(ctx, x0, x1, x2, x3, x4);		\
 	} while (0)
 #define set_aapcs_args6(ctx, x0, x1, x2, x3, x4, x5, x6)	do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X6, x6);	\
 		set_aapcs_args5(ctx, x0, x1, x2, x3, x4, x5);		\
 	} while (0)
 #define set_aapcs_args7(ctx, x0, x1, x2, x3, x4, x5, x6, x7)	do {	\
 		write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X7, x7);	\
 		set_aapcs_args6(ctx, x0, x1, x2, x3, x4, x5, x6);	\
 	} while (0)

 /*******************************************************************************
  * Function prototypes
  ******************************************************************************/
 void el1_sysregs_context_save(el1_sys_regs_t *regs);
 void el1_sysregs_context_restore(el1_sys_regs_t *regs);
 #if CTX_INCLUDE_FPREGS
 void fpregs_context_save(fp_regs_t *regs);
 void fpregs_context_restore(fp_regs_t *regs);
 #endif


 #undef CTX_SYSREG_ALL
 #if CTX_INCLUDE_FPREGS
 #undef CTX_FPREG_ALL
 #endif
 #undef CTX_GPREG_ALL
 #undef CTX_EL3STATE_ALL

 #endif /* __ASSEMBLY__ */

 #endif /* __CONTEXT_H__ */
	/*
	* Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#ifndef __CONTEXT_H__
	#define __CONTEXT_H__

	#include <utils_def.h>

	/*******************************************************************************
	* Constants that allow assembler code to access members of and the 'gp_regs'
	* structure at their correct offsets.
	******************************************************************************/
	#define CTX_GPREGS_OFFSET U(0x0)
	#define CTX_GPREG_X0 U(0x0)
	#define CTX_GPREG_X1 U(0x8)
	#define CTX_GPREG_X2 U(0x10)
	#define CTX_GPREG_X3 U(0x18)
	#define CTX_GPREG_X4 U(0x20)
	#define CTX_GPREG_X5 U(0x28)
	#define CTX_GPREG_X6 U(0x30)
	#define CTX_GPREG_X7 U(0x38)
	#define CTX_GPREG_X8 U(0x40)
	#define CTX_GPREG_X9 U(0x48)
	#define CTX_GPREG_X10 U(0x50)
	#define CTX_GPREG_X11 U(0x58)
	#define CTX_GPREG_X12 U(0x60)
	#define CTX_GPREG_X13 U(0x68)
	#define CTX_GPREG_X14 U(0x70)
	#define CTX_GPREG_X15 U(0x78)
	#define CTX_GPREG_X16 U(0x80)
	#define CTX_GPREG_X17 U(0x88)
	#define CTX_GPREG_X18 U(0x90)
	#define CTX_GPREG_X19 U(0x98)
	#define CTX_GPREG_X20 U(0xa0)
	#define CTX_GPREG_X21 U(0xa8)
	#define CTX_GPREG_X22 U(0xb0)
	#define CTX_GPREG_X23 U(0xb8)
	#define CTX_GPREG_X24 U(0xc0)
	#define CTX_GPREG_X25 U(0xc8)
	#define CTX_GPREG_X26 U(0xd0)
	#define CTX_GPREG_X27 U(0xd8)
	#define CTX_GPREG_X28 U(0xe0)
	#define CTX_GPREG_X29 U(0xe8)
	#define CTX_GPREG_LR U(0xf0)
	#define CTX_GPREG_SP_EL0 U(0xf8)
	#define CTX_GPREGS_END U(0x100)

	/*******************************************************************************
	* Constants that allow assembler code to access members of and the 'el3_state'
	* structure at their correct offsets. Note that some of the registers are only
	* 32-bits wide but are stored as 64-bit values for convenience
	******************************************************************************/
	#define CTX_EL3STATE_OFFSET (CTX_GPREGS_OFFSET + CTX_GPREGS_END)
	#define CTX_SCR_EL3 U(0x0)
	#define CTX_ESR_EL3 U(0x8)
	#define CTX_RUNTIME_SP U(0x10)
	#define CTX_SPSR_EL3 U(0x18)
	#define CTX_ELR_EL3 U(0x20)
	#define CTX_UNUSED U(0x28)
	#define CTX_EL3STATE_END U(0x30)

	/*******************************************************************************
	* Constants that allow assembler code to access members of and the
	* 'el1_sys_regs' structure at their correct offsets. Note that some of the
	* registers are only 32-bits wide but are stored as 64-bit values for
	* convenience
	******************************************************************************/
	#define CTX_SYSREGS_OFFSET (CTX_EL3STATE_OFFSET + CTX_EL3STATE_END)
	#define CTX_SPSR_EL1 U(0x0)
	#define CTX_ELR_EL1 U(0x8)
	#define CTX_SCTLR_EL1 U(0x10)
	#define CTX_ACTLR_EL1 U(0x18)
	#define CTX_CPACR_EL1 U(0x20)
	#define CTX_CSSELR_EL1 U(0x28)
	#define CTX_SP_EL1 U(0x30)
	#define CTX_ESR_EL1 U(0x38)
	#define CTX_TTBR0_EL1 U(0x40)
	#define CTX_TTBR1_EL1 U(0x48)
	#define CTX_MAIR_EL1 U(0x50)
	#define CTX_AMAIR_EL1 U(0x58)
	#define CTX_TCR_EL1 U(0x60)
	#define CTX_TPIDR_EL1 U(0x68)
	#define CTX_TPIDR_EL0 U(0x70)
	#define CTX_TPIDRRO_EL0 U(0x78)
	#define CTX_PAR_EL1 U(0x80)
	#define CTX_FAR_EL1 U(0x88)
	#define CTX_AFSR0_EL1 U(0x90)
	#define CTX_AFSR1_EL1 U(0x98)
	#define CTX_CONTEXTIDR_EL1 U(0xa0)
	#define CTX_VBAR_EL1 U(0xa8)
	#define CTX_PMCR_EL0 U(0xb0)

	/*
	* If the platform is AArch64-only, there is no need to save and restore these
	* AArch32 registers.
	*/
	#if CTX_INCLUDE_AARCH32_REGS
	#define CTX_SPSR_ABT U(0xc0) /* Align to the next 16 byte boundary */
	#define CTX_SPSR_UND U(0xc8)
	#define CTX_SPSR_IRQ U(0xd0)
	#define CTX_SPSR_FIQ U(0xd8)
	#define CTX_DACR32_EL2 U(0xe0)
	#define CTX_IFSR32_EL2 U(0xe8)
	#define CTX_TIMER_SYSREGS_OFF U(0xf0) /* Align to the next 16 byte boundary */
	#else
	#define CTX_TIMER_SYSREGS_OFF U(0xc0) /* Align to the next 16 byte boundary */
	#endif /* __CTX_INCLUDE_AARCH32_REGS__ */

	/*
	* If the timer registers aren't saved and restored, we don't have to reserve
	* space for them in the context
	*/
	#if NS_TIMER_SWITCH
	#define CTX_CNTP_CTL_EL0 (CTX_TIMER_SYSREGS_OFF + U(0x0))
	#define CTX_CNTP_CVAL_EL0 (CTX_TIMER_SYSREGS_OFF + U(0x8))
	#define CTX_CNTV_CTL_EL0 (CTX_TIMER_SYSREGS_OFF + U(0x10))
	#define CTX_CNTV_CVAL_EL0 (CTX_TIMER_SYSREGS_OFF + U(0x18))
	#define CTX_CNTKCTL_EL1 (CTX_TIMER_SYSREGS_OFF + U(0x20))
	#define CTX_SYSREGS_END (CTX_TIMER_SYSREGS_OFF + U(0x30)) /* Align to the next 16 byte boundary */
	#else
	#define CTX_SYSREGS_END CTX_TIMER_SYSREGS_OFF
	#endif /* __NS_TIMER_SWITCH__ */

	/*******************************************************************************
	* Constants that allow assembler code to access members of and the 'fp_regs'
	* structure at their correct offsets.
	******************************************************************************/
	#define CTX_FPREGS_OFFSET (CTX_SYSREGS_OFFSET + CTX_SYSREGS_END)
	#if CTX_INCLUDE_FPREGS
	#define CTX_FP_Q0 U(0x0)
	#define CTX_FP_Q1 U(0x10)
	#define CTX_FP_Q2 U(0x20)
	#define CTX_FP_Q3 U(0x30)
	#define CTX_FP_Q4 U(0x40)
	#define CTX_FP_Q5 U(0x50)
	#define CTX_FP_Q6 U(0x60)
	#define CTX_FP_Q7 U(0x70)
	#define CTX_FP_Q8 U(0x80)
	#define CTX_FP_Q9 U(0x90)
	#define CTX_FP_Q10 U(0xa0)
	#define CTX_FP_Q11 U(0xb0)
	#define CTX_FP_Q12 U(0xc0)
	#define CTX_FP_Q13 U(0xd0)
	#define CTX_FP_Q14 U(0xe0)
	#define CTX_FP_Q15 U(0xf0)
	#define CTX_FP_Q16 U(0x100)
	#define CTX_FP_Q17 U(0x110)
	#define CTX_FP_Q18 U(0x120)
	#define CTX_FP_Q19 U(0x130)
	#define CTX_FP_Q20 U(0x140)
	#define CTX_FP_Q21 U(0x150)
	#define CTX_FP_Q22 U(0x160)
	#define CTX_FP_Q23 U(0x170)
	#define CTX_FP_Q24 U(0x180)
	#define CTX_FP_Q25 U(0x190)
	#define CTX_FP_Q26 U(0x1a0)
	#define CTX_FP_Q27 U(0x1b0)
	#define CTX_FP_Q28 U(0x1c0)
	#define CTX_FP_Q29 U(0x1d0)
	#define CTX_FP_Q30 U(0x1e0)
	#define CTX_FP_Q31 U(0x1f0)
	#define CTX_FP_FPSR U(0x200)
	#define CTX_FP_FPCR U(0x208)
	#if CTX_INCLUDE_AARCH32_REGS
	#define CTX_FP_FPEXC32_EL2 U(0x210)
	#define CTX_FPREGS_END U(0x220) /* Align to the next 16 byte boundary */
	#else
	#define CTX_FPREGS_END U(0x210) /* Align to the next 16 byte boundary */
	#endif
	#else
	#define CTX_FPREGS_END U(0)
	#endif

	#define CTX_CVE_2018_3639_OFFSET (CTX_FPREGS_OFFSET + CTX_FPREGS_END)
	#define CTX_CVE_2018_3639_DISABLE U(0)
	#define CTX_CVE_2018_3639_END U(0x10) /* Align to the next 16 byte boundary */

	#ifndef __ASSEMBLY__

	#include <cassert.h>
	#include <platform_def.h> /* for CACHE_WRITEBACK_GRANULE */
	#include <stdint.h>

	/*
	* Common constants to help define the 'cpu_context' structure and its
	* members below.
	*/
	#define DWORD_SHIFT U(3)
	#define DEFINE_REG_STRUCT(name, num_regs) \
	typedef struct name { \
	uint64_t _regs[num_regs]; \
	} __aligned(16) name##_t

	/* Constants to determine the size of individual context structures */
	#define CTX_GPREG_ALL (CTX_GPREGS_END >> DWORD_SHIFT)
	#define CTX_SYSREG_ALL (CTX_SYSREGS_END >> DWORD_SHIFT)
	#if CTX_INCLUDE_FPREGS
	#define CTX_FPREG_ALL (CTX_FPREGS_END >> DWORD_SHIFT)
	#endif
	#define CTX_EL3STATE_ALL (CTX_EL3STATE_END >> DWORD_SHIFT)
	#define CTX_CVE_2018_3639_ALL (CTX_CVE_2018_3639_END >> DWORD_SHIFT)

	/*
	* AArch64 general purpose register context structure. Usually x0-x18,
	* lr are saved as the compiler is expected to preserve the remaining
	* callee saved registers if used by the C runtime and the assembler
	* does not touch the remaining. But in case of world switch during
	* exception handling, we need to save the callee registers too.
	*/
	DEFINE_REG_STRUCT(gp_regs, CTX_GPREG_ALL);

	/*
	* AArch64 EL1 system register context structure for preserving the
	* architectural state during switches from one security state to
	* another in EL1.
	*/
	DEFINE_REG_STRUCT(el1_sys_regs, CTX_SYSREG_ALL);

	/*
	* AArch64 floating point register context structure for preserving
	* the floating point state during switches from one security state to
	* another.
	*/
	#if CTX_INCLUDE_FPREGS
	DEFINE_REG_STRUCT(fp_regs, CTX_FPREG_ALL);
	#endif

	/*
	* Miscellaneous registers used by EL3 firmware to maintain its state
	* across exception entries and exits
	*/
	DEFINE_REG_STRUCT(el3_state, CTX_EL3STATE_ALL);

	/* Function pointer used by CVE-2018-3639 dynamic mitigation */
	DEFINE_REG_STRUCT(cve_2018_3639, CTX_CVE_2018_3639_ALL);

	/*
	* Macros to access members of any of the above structures using their
	* offsets
	*/
	#define read_ctx_reg(ctx, offset) ((ctx)->_regs[(offset) >> DWORD_SHIFT])
	#define write_ctx_reg(ctx, offset, val) (((ctx)->_regs[(offset) >> DWORD_SHIFT]) \
	= (uint64_t) (val))

	/*
	* Top-level context structure which is used by EL3 firmware to
	* preserve the state of a core at EL1 in one of the two security
	* states and save enough EL3 meta data to be able to return to that
	* EL and security state. The context management library will be used
	* to ensure that SP_EL3 always points to an instance of this
	* structure at exception entry and exit. Each instance will
	* correspond to either the secure or the non-secure state.
	*/
	typedef struct cpu_context {
	gp_regs_t gpregs_ctx;
	el3_state_t el3state_ctx;
	el1_sys_regs_t sysregs_ctx;
	#if CTX_INCLUDE_FPREGS
	fp_regs_t fpregs_ctx;
	#endif
	cve_2018_3639_t cve_2018_3639_ctx;
	} cpu_context_t;

	/* Macros to access members of the 'cpu_context_t' structure */
	#define get_el3state_ctx(h) (&((cpu_context_t *) h)->el3state_ctx)
	#if CTX_INCLUDE_FPREGS
	#define get_fpregs_ctx(h) (&((cpu_context_t *) h)->fpregs_ctx)
	#endif
	#define get_sysregs_ctx(h) (&((cpu_context_t *) h)->sysregs_ctx)
	#define get_gpregs_ctx(h) (&((cpu_context_t *) h)->gpregs_ctx)
	#define get_cve_2018_3639_ctx(h) (&((cpu_context_t *) h)->cve_2018_3639_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_GPREGS_OFFSET == __builtin_offsetof(cpu_context_t, gpregs_ctx), \
	assert_core_context_gp_offset_mismatch);
	CASSERT(CTX_SYSREGS_OFFSET == __builtin_offsetof(cpu_context_t, sysregs_ctx), \
	assert_core_context_sys_offset_mismatch);
	#if CTX_INCLUDE_FPREGS
	CASSERT(CTX_FPREGS_OFFSET == __builtin_offsetof(cpu_context_t, fpregs_ctx), \
	assert_core_context_fp_offset_mismatch);
	#endif
	CASSERT(CTX_EL3STATE_OFFSET == __builtin_offsetof(cpu_context_t, el3state_ctx), \
	assert_core_context_el3state_offset_mismatch);
	CASSERT(CTX_CVE_2018_3639_OFFSET == __builtin_offsetof(cpu_context_t, cve_2018_3639_ctx), \
	assert_core_context_cve_2018_3639_offset_mismatch);

	/*
	* Helper macro to set the general purpose registers that correspond to
	* parameters in an aapcs_64 call i.e. x0-x7
	*/
	#define set_aapcs_args0(ctx, x0) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X0, x0); \
	} while (0)
	#define set_aapcs_args1(ctx, x0, x1) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X1, x1); \
	set_aapcs_args0(ctx, x0); \
	} while (0)
	#define set_aapcs_args2(ctx, x0, x1, x2) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X2, x2); \
	set_aapcs_args1(ctx, x0, x1); \
	} while (0)
	#define set_aapcs_args3(ctx, x0, x1, x2, x3) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X3, x3); \
	set_aapcs_args2(ctx, x0, x1, x2); \
	} while (0)
	#define set_aapcs_args4(ctx, x0, x1, x2, x3, x4) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X4, x4); \
	set_aapcs_args3(ctx, x0, x1, x2, x3); \
	} while (0)
	#define set_aapcs_args5(ctx, x0, x1, x2, x3, x4, x5) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X5, x5); \
	set_aapcs_args4(ctx, x0, x1, x2, x3, x4); \
	} while (0)
	#define set_aapcs_args6(ctx, x0, x1, x2, x3, x4, x5, x6) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X6, x6); \
	set_aapcs_args5(ctx, x0, x1, x2, x3, x4, x5); \
	} while (0)
	#define set_aapcs_args7(ctx, x0, x1, x2, x3, x4, x5, x6, x7) do { \
	write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X7, x7); \
	set_aapcs_args6(ctx, x0, x1, x2, x3, x4, x5, x6); \
	} while (0)

	/*******************************************************************************
	* Function prototypes
	******************************************************************************/
	void el1_sysregs_context_save(el1_sys_regs_t *regs);
	void el1_sysregs_context_restore(el1_sys_regs_t *regs);
	#if CTX_INCLUDE_FPREGS
	void fpregs_context_save(fp_regs_t *regs);
	void fpregs_context_restore(fp_regs_t *regs);
	#endif


	#undef CTX_SYSREG_ALL
	#if CTX_INCLUDE_FPREGS
	#undef CTX_FPREG_ALL
	#endif
	#undef CTX_GPREG_ALL
	#undef CTX_EL3STATE_ALL

	#endif /* __ASSEMBLY__ */

	#endif /* __CONTEXT_H__ */