linux-user/nios2/target_cpu.h

   1 /*
   2  * Nios2 specific CPU ABI and functions for linux-user
   3  *
   4  * Copyright (c) 2016 Marek Vasut <marex@denx.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
  20 #ifndef NIOS2_TARGET_CPU_H
  21 #define NIOS2_TARGET_CPU_H
  22
  23 static inline void cpu_clone_regs_child(CPUNios2State *env, target_ulong newsp,
  24                                         unsigned flags)
  25 {
  26     if (newsp) {
  27         env->regs[R_SP] = newsp;
  28     }
  29     env->regs[R_RET0] = 0;
  30 }
  31
  32 static inline void cpu_clone_regs_parent(CPUNios2State *env, unsigned flags)
  33 {
  34 }
  35
  36 static inline void cpu_set_tls(CPUNios2State *env, target_ulong newtls)
  37 {
  38     /*
  39      * Linux kernel 3.10 does not pay any attention to CLONE_SETTLS
  40      * in copy_thread(), so QEMU need not do so either.
  41      */
  42 }
  43
  44 static inline abi_ulong get_sp_from_cpustate(CPUNios2State *state)
  45 {
  46     return state->regs[R_SP];
  47 }
  48 #endif