arm-trusted-firmware/bl31/bl31_traps.c

/*
 * Copyright (c) 2022, ARM Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Dispatch synchronous system register traps from lower ELs.
 */

#include <bl31/sync_handle.h>
#include <context.h>

int handle_sysreg_trap(uint64_t esr_el3, cpu_context_t *ctx)
{
	switch (esr_el3 & ISS_SYSREG_OPCODE_MASK) {
#if ENABLE_FEAT_RNG_TRAP
	case ISS_SYSREG_OPCODE_RNDR:
	case ISS_SYSREG_OPCODE_RNDRRS:
		return plat_handle_rng_trap(esr_el3, ctx);
#endif
	default:
		return TRAP_RET_UNHANDLED;
	}
}