1 /* 2 * ARM AArch64 specific CPU ABI and functions for linux-user 3 * 4 * Copyright (c) 2013 Alexander Graf <agraf@suse.de> 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #ifndef AARCH64_TARGET_CPU_H 20 #define AARCH64_TARGET_CPU_H 21 22 static inline void cpu_clone_regs_child(CPUARMState *env, target_ulong newsp, 23 unsigned flags) 24 { 25 if (newsp) { 26 env->xregs[31] = newsp; 27 } 28 env->xregs[0] = 0; 29 } 30 31 static inline void cpu_clone_regs_parent(CPUARMState *env, unsigned flags) 32 { 33 } 34 35 static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls) 36 { 37 /* 38 * Note that AArch64 Linux keeps the TLS pointer in TPIDR; this is 39 * different from AArch32 Linux, which uses TPIDRRO. 40 */ 41 env->cp15.tpidr_el[0] = newtls; 42 /* TPIDR2_EL0 is cleared with CLONE_SETTLS. */ 43 env->cp15.tpidr2_el0 = 0; 44 } 45 46 static inline abi_ulong get_sp_from_cpustate(CPUARMState *state) 47 { 48 return state->xregs[31]; 49 } 50 #endif 51