Replace noreturn with QEMU_NORETURN
[qemu-kvm/fedora.git] / target-ppc / helper_regs.h
blob15392393ec72da28ecdc32c7a4cf2436625e4ede
1 /*
2 * PowerPC emulation special registers manipulation helpers for qemu.
4 * Copyright (c) 2003-2007 Jocelyn Mayer
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 of the License, or (at your option) any later version.
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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
21 #if !defined(__HELPER_REGS_H__)
22 #define __HELPER_REGS_H__
24 /* Swap temporary saved registers with GPRs */
25 static always_inline void hreg_swap_gpr_tgpr (CPUPPCState *env)
27 target_ulong tmp;
29 tmp = env->gpr[0];
30 env->gpr[0] = env->tgpr[0];
31 env->tgpr[0] = tmp;
32 tmp = env->gpr[1];
33 env->gpr[1] = env->tgpr[1];
34 env->tgpr[1] = tmp;
35 tmp = env->gpr[2];
36 env->gpr[2] = env->tgpr[2];
37 env->tgpr[2] = tmp;
38 tmp = env->gpr[3];
39 env->gpr[3] = env->tgpr[3];
40 env->tgpr[3] = tmp;
43 static always_inline void hreg_compute_mem_idx (CPUPPCState *env)
45 /* Precompute MMU index */
46 if (msr_pr == 0 && msr_hv != 0) {
47 env->mmu_idx = 2;
48 } else {
49 env->mmu_idx = 1 - msr_pr;
53 static always_inline void hreg_compute_hflags (CPUPPCState *env)
55 target_ulong hflags_mask;
57 /* We 'forget' FE0 & FE1: we'll never generate imprecise exceptions */
58 hflags_mask = (1 << MSR_VR) | (1 << MSR_AP) | (1 << MSR_SA) |
59 (1 << MSR_PR) | (1 << MSR_FP) | (1 << MSR_SE) | (1 << MSR_BE) |
60 (1 << MSR_LE);
61 hflags_mask |= (1ULL << MSR_CM) | (1ULL << MSR_SF) | MSR_HVB;
62 hreg_compute_mem_idx(env);
63 env->hflags = env->msr & hflags_mask;
64 /* Merge with hflags coming from other registers */
65 env->hflags |= env->hflags_nmsr;
68 static always_inline int hreg_store_msr (CPUPPCState *env, target_ulong value,
69 int alter_hv)
71 int excp;
73 excp = 0;
74 value &= env->msr_mask;
75 #if !defined (CONFIG_USER_ONLY)
76 if (!alter_hv) {
77 /* mtmsr cannot alter the hypervisor state */
78 value &= ~MSR_HVB;
79 value |= env->msr & MSR_HVB;
81 if (((value >> MSR_IR) & 1) != msr_ir ||
82 ((value >> MSR_DR) & 1) != msr_dr) {
83 /* Flush all tlb when changing translation mode */
84 tlb_flush(env, 1);
85 excp = POWERPC_EXCP_NONE;
86 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
88 if (unlikely((env->flags & POWERPC_FLAG_TGPR) &&
89 ((value ^ env->msr) & (1 << MSR_TGPR)))) {
90 /* Swap temporary saved registers with GPRs */
91 hreg_swap_gpr_tgpr(env);
93 if (unlikely((value >> MSR_EP) & 1) != msr_ep) {
94 /* Change the exception prefix on PowerPC 601 */
95 env->excp_prefix = ((value >> MSR_EP) & 1) * 0xFFF00000;
97 #endif
98 env->msr = value;
99 hreg_compute_hflags(env);
100 #if !defined (CONFIG_USER_ONLY)
101 if (unlikely(msr_pow == 1)) {
102 if ((*env->check_pow)(env)) {
103 env->halted = 1;
104 excp = EXCP_HALTED;
107 #endif
109 return excp;
112 #endif /* !defined(__HELPER_REGS_H__) */