services/std_svc/rmmd/trp/trp_private.h

/*
 * Copyright (c) 2021-2022, Arm Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef TRP_PRIVATE_H
#define TRP_PRIVATE_H

#include <services/rmmd_svc.h>

/* Definitions to help the assembler access the SMC/ERET args structure */
#define TRP_ARGS_SIZE		TRP_ARGS_END
#define TRP_ARG0		0x0
#define TRP_ARG1		0x8
#define TRP_ARG2		0x10
#define TRP_ARG3		0x18
#define TRP_ARG4		0x20
#define TRP_ARG5		0x28
#define TRP_ARG6		0x30
#define TRP_ARG7		0x38
#define TRP_ARGS_END		0x40

/* Definitions for RMM-EL3 Interface ABI VERSION */
#define TRP_RMM_EL3_ABI_VERS_MAJOR	RMM_EL3_IFC_VERSION_MAJOR
#define TRP_RMM_EL3_ABI_VERS_MINOR	RMM_EL3_IFC_VERSION_MINOR
#define TRP_RMM_EL3_ABI_VERS	(((TRP_RMM_EL3_ABI_VERS_MAJOR & 0x7FFF) << 16) | \
				 (TRP_RMM_EL3_ABI_VERS_MINOR & 0xFFFF))

#define TRP_PLATFORM_CORE_COUNT		PLATFORM_CORE_COUNT

#ifndef __ASSEMBLER__

#include <stdint.h>

/* Data structure to hold SMC arguments */
typedef struct trp_args {
	uint64_t regs[TRP_ARGS_END >> 3];
} __aligned(CACHE_WRITEBACK_GRANULE) trp_args_t;

#define write_trp_arg(args, offset, val) (((args)->regs[offset >> 3])	\
					 = val)
/* RMI SMC64 FIDs handled by the TRP */
#define RMI_RMM_REQ_VERSION		SMC64_RMI_FID(U(0))
#define RMI_RMM_GRANULE_DELEGATE	SMC64_RMI_FID(U(1))
#define RMI_RMM_GRANULE_UNDELEGATE	SMC64_RMI_FID(U(2))

/* Definitions for RMI VERSION */
#define RMI_ABI_VERSION_MAJOR		U(0x0)
#define RMI_ABI_VERSION_MINOR		U(0x0)
#define RMI_ABI_VERSION			(((RMI_ABI_VERSION_MAJOR & 0x7FFF) \
								  << 16) | \
					 (RMI_ABI_VERSION_MINOR & 0xFFFF))

#define TRP_RMM_EL3_VERSION_GET_MAJOR(x)		\
				RMM_EL3_IFC_VERSION_GET_MAJOR((x))
#define TRP_RMM_EL3_VERSION_GET_MINOR(x)		\
				RMM_EL3_IFC_VERSION_GET_MAJOR_MINOR((x))

/* Helper to issue SMC calls to BL31 */
uint64_t trp_smc(trp_args_t *);

/* The main function to executed only by Primary CPU */
void trp_main(void);

/* Setup TRP. Executed only by Primary CPU */
void trp_setup(uint64_t x0,
	       uint64_t x1,
	       uint64_t x2,
	       uint64_t x3);

#endif /* __ASSEMBLER__ */
#endif /* TRP_PRIVATE_H */