LXR qemu/linux-user/arm/target

   1/*
   2 * ARM specific CPU ABI and functions for linux-user
   3 *
   4 * Copyright (c) 2003 Fabrice Bellard
   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 ARM_TARGET_CPU_H
  20#define ARM_TARGET_CPU_H
  21
  22static inline unsigned long arm_max_reserved_va(CPUState *cs)
  23{
  24    ARMCPU *cpu = ARM_CPU(cs);
  25
  26    if (arm_feature(&cpu->env, ARM_FEATURE_M)) {
  27        /*
  28         * There are magic return addresses above 0xfe000000,
  29         * and in general a lot of M-profile system stuff in
  30         * the high addresses.  Restrict linux-user to the
  31         * cached write-back RAM in the system map.
  32         */
  33        return 0x80000000ul;
  34    } else {
  35        /*
  36         * We need to be able to map the commpage.
  37         * See validate_guest_space in linux-user/elfload.c.
  38         */
  39        return 0xffff0000ul;
  40    }
  41}
  42#define MAX_RESERVED_VA  arm_max_reserved_va
  43
  44static inline void cpu_clone_regs_child(CPUARMState *env, target_ulong newsp,
  45                                        unsigned flags)
  46{
  47    if (newsp) {
  48        env->regs[13] = newsp;
  49    }
  50    env->regs[0] = 0;
  51}
  52
  53static inline void cpu_clone_regs_parent(CPUARMState *env, unsigned flags)
  54{
  55}
  56
  57static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
  58{
  59    if (access_secure_reg(env)) {
  60        env->cp15.tpidruro_s = newtls;
  61    } else {
  62        env->cp15.tpidrro_el[0] = newtls;
  63    }
  64}
  65
  66static inline target_ulong cpu_get_tls(CPUARMState *env)
  67{
  68    if (access_secure_reg(env)) {
  69        return env->cp15.tpidruro_s;
  70    } else {
  71        return env->cp15.tpidrro_el[0];
  72    }
  73}
  74
  75static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
  76{
  77   return state->regs[13];
  78}
  79#endif
  80