mirror of https://gitee.com/openkylin/qemu.git
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
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* ARM specific CPU ABI and functions for linux-user
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ARM_TARGET_CPU_H
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#define ARM_TARGET_CPU_H
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static inline unsigned long arm_max_reserved_va(CPUState *cs)
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{
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ARMCPU *cpu = ARM_CPU(cs);
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if (arm_feature(&cpu->env, ARM_FEATURE_M)) {
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/*
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* There are magic return addresses above 0xfe000000,
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* and in general a lot of M-profile system stuff in
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* the high addresses. Restrict linux-user to the
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* cached write-back RAM in the system map.
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*/
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return 0x80000000ul;
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} else {
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/*
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* We need to be able to map the commpage.
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* See validate_guest_space in linux-user/elfload.c.
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*/
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return 0xffff0000ul;
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}
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}
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#define MAX_RESERVED_VA arm_max_reserved_va
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static inline void cpu_clone_regs_child(CPUARMState *env, target_ulong newsp,
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unsigned flags)
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{
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if (newsp) {
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env->regs[13] = newsp;
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}
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env->regs[0] = 0;
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}
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static inline void cpu_clone_regs_parent(CPUARMState *env, unsigned flags)
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{
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}
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static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
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{
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if (access_secure_reg(env)) {
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env->cp15.tpidruro_s = newtls;
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} else {
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env->cp15.tpidrro_el[0] = newtls;
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}
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}
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static inline target_ulong cpu_get_tls(CPUARMState *env)
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{
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if (access_secure_reg(env)) {
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return env->cp15.tpidruro_s;
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} else {
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return env->cp15.tpidrro_el[0];
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}
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}
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static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
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{
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return state->regs[13];
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}
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#endif
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