| 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 | |
| 22 | static 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 0x7ffffffful; |
| 34 | } else { |
| 35 | /* |
| 36 | * We need to be able to map the commpage. |
| 37 | * See init_guest_commpage in linux-user/elfload.c. |
| 38 | */ |
| 39 | return 0xfffffffful; |
| 40 | } |
| 41 | } |
| 42 | #define MAX_RESERVED_VA arm_max_reserved_va |
| 43 | |
| 44 | static 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 | |
| 53 | static inline void cpu_clone_regs_parent(CPUARMState *env, unsigned flags) |
| 54 | { |
| 55 | } |
| 56 | |
| 57 | static 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 | |
| 66 | static 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 | |
| 75 | static inline abi_ulong get_sp_from_cpustate(CPUARMState *state) |
| 76 | { |
| 77 | return state->regs[13]; |
| 78 | } |
| 79 | #endif |