linux-user/aarch64/target_cpu.h

   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 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(CPUARMState *env, target_ulong newsp)
  23 {
  24     if (newsp) {
  25         env->xregs[31] = newsp;
  26     }
  27     env->xregs[0] = 0;
  28 }
  29
  30 static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
  31 {
  32     /* Note that AArch64 Linux keeps the TLS pointer in TPIDR; this is
  33      * different from AArch32 Linux, which uses TPIDRRO.
  34      */
  35     env->cp15.tpidr_el[0] = newtls;
  36 }
  37
  38 static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
  39 {
  40    return state->xregs[31];
  41 }
  42 #endif