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     /* Note that AArch64 Linux keeps the TLS pointer in TPIDR; this is
38      * different from AArch32 Linux, which uses TPIDRRO.
39      */
40     env->cp15.tpidr_el[0] = newtls;
41 }
42 
43 static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
44 {
45    return state->xregs[31];
46 }
47 #endif
48