Merge remote-tracking branch 'remotes/alistair/tags/pull-riscv-to-apply-20210511...
[qemu.git] / linux-user / alpha / target_cpu.h
1 /*
2 * Alpha specific CPU ABI and functions for linux-user
3 *
4 * Copyright (c) 2007 Jocelyn Mayer
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 ALPHA_TARGET_CPU_H
20 #define ALPHA_TARGET_CPU_H
21
22 static inline void cpu_clone_regs_child(CPUAlphaState *env, target_ulong newsp,
23 unsigned flags)
24 {
25 if (newsp) {
26 env->ir[IR_SP] = newsp;
27 }
28 env->ir[IR_V0] = 0;
29 env->ir[IR_A3] = 0;
30 env->ir[IR_A4] = 1; /* OSF/1 secondary return: child */
31 }
32
33 static inline void cpu_clone_regs_parent(CPUAlphaState *env, unsigned flags)
34 {
35 /*
36 * OSF/1 secondary return: parent
37 * Note that the kernel does not do this if SETTLS, because the
38 * settls argument register is still live after copy_thread.
39 */
40 if (!(flags & CLONE_SETTLS)) {
41 env->ir[IR_A4] = 0;
42 }
43 }
44
45 static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls)
46 {
47 env->unique = newtls;
48 }
49
50 static inline abi_ulong get_sp_from_cpustate(CPUAlphaState *state)
51 {
52 return state->ir[IR_SP];
53 }
54 #endif