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https://github.com/ARM-software/arm-trusted-firmware.git
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b96253db08
This patch adds X2-X6 and 'smc_ret' parameters to trp_rmi_handler(). The last 'smc_ret' parameter passed in X7 contains address of 'trp_smc_result' structure on stack to return result of RMI SMC call. This allows to preserve X4 if not used as a return argument as per SMCCCv1.2. The patch also removes use of trp_args_t in RMI handling. Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com> Change-Id: I9e3387a7380b37863eeccc53d13e92e0ac5cffbd
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/*
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* Copyright (c) 2022, Arm Limited. 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 TRP_HELPERS_H
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#define TRP_HELPERS_H
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/* Definitions to help the assembler access the SMC/ERET args structure */
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#define TRP_ARGS_SIZE TRP_ARGS_END
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#define TRP_ARG0 0x0
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#define TRP_ARG1 0x8
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#define TRP_ARG2 0x10
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#define TRP_ARG3 0x18
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#define TRP_ARG4 0x20
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#define TRP_ARG5 0x28
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#define TRP_ARG6 0x30
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#define TRP_ARG7 0x38
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#define TRP_ARGS_END 0x40
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#ifndef __ASSEMBLER__
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#include <platform_def.h>
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/* Data structure to hold SMC arguments */
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typedef struct trp_args {
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uint64_t regs[TRP_ARGS_END >> 3];
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} __aligned(CACHE_WRITEBACK_GRANULE) trp_args_t;
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trp_args_t *set_smc_args(uint64_t arg0,
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uint64_t arg1,
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uint64_t arg2,
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uint64_t arg3,
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uint64_t arg4,
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uint64_t arg5,
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uint64_t arg6,
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uint64_t arg7);
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__dead2 void trp_boot_abort(uint64_t err);
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/* TRP SMC result registers X0-X4 */
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#define TRP_SMC_RESULT_REGS 5
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struct trp_smc_result {
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unsigned long long x[TRP_SMC_RESULT_REGS];
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};
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#endif /* __ASSEMBLER __ */
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#endif /* TRP_HELPERS_H */
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