1 /* 2 * Copyright (c) 2022, ARM Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Dispatch synchronous system register traps from lower ELs. 7 */ 8 9 #include <bl31/sync_handle.h> 10 #include <context.h> 11 12 int handle_sysreg_trap(uint64_t esr_el3, cpu_context_t *ctx) 13 { 14 switch (esr_el3 & ISS_SYSREG_OPCODE_MASK) { 15 #if ENABLE_FEAT_RNG_TRAP 16 case ISS_SYSREG_OPCODE_RNDR: 17 case ISS_SYSREG_OPCODE_RNDRRS: 18 return plat_handle_rng_trap(esr_el3, ctx); 19 #endif 20 default: 21 return TRAP_RET_UNHANDLED; 22 } 23 } 24