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