49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
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* Copyright (c) 2018, 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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#include <arch_helpers.h>
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#include <assert.h>
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#include <context_mgmt.h>
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#include <debug.h>
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#include <smccc.h>
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#include <smccc_helpers.h>
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#include <sprt_svc.h>
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#include <utils.h>
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#include "spm_private.h"
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/*******************************************************************************
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* This function handles all SMCs in the range reserved for SPRT.
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******************************************************************************/
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uint64_t sprt_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2,
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uint64_t x3, uint64_t x4, void *cookie, void *handle,
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uint64_t flags)
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{
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/* SPRT only supported from the Secure world */
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if (is_caller_non_secure(flags) == SMC_FROM_NON_SECURE) {
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SMC_RET1(handle, SMC_UNK);
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}
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assert(handle == cm_get_context(SECURE));
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/*
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* Only S-EL0 partitions are supported for now. Make the next ERET into
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* the partition jump directly to S-EL0 instead of S-EL1.
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*/
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cm_set_elr_spsr_el3(SECURE, read_elr_el1(), read_spsr_el1());
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switch (smc_fid) {
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case SPRT_VERSION:
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SMC_RET1(handle, SPRT_VERSION_COMPILED);
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default:
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break;
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}
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WARN("SPRT: Unsupported call 0x%08x\n", smc_fid);
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SMC_RET1(handle, SPRT_NOT_SUPPORTED);
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}
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