| 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 |