Return to helper_regs.h CVS log

Up to [Qemu by Fabrice Bellard] / qemu / target-ppc

Annotation of qemu/target-ppc/helper_regs.h, revision 1.1.1.4

1.1       root        1: /*
                      2:  *  PowerPC emulation special registers manipulation helpers for qemu.
                      3:  *
                      4:  *  Copyright (c) 2003-2007 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 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
1.1.1.3   root       17:  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
1.1       root       18:  */
                     19: 
                     20: #if !defined(__HELPER_REGS_H__)
                     21: #define __HELPER_REGS_H__
                     22: 
                     23: /* Swap temporary saved registers with GPRs */
1.1.1.4 ! root       24: static inline void hreg_swap_gpr_tgpr(CPUPPCState *env)
1.1       root       25: {
1.1.1.2   root       26:     target_ulong tmp;
1.1       root       27: 
                     28:     tmp = env->gpr[0];
                     29:     env->gpr[0] = env->tgpr[0];
                     30:     env->tgpr[0] = tmp;
                     31:     tmp = env->gpr[1];
                     32:     env->gpr[1] = env->tgpr[1];
                     33:     env->tgpr[1] = tmp;
                     34:     tmp = env->gpr[2];
                     35:     env->gpr[2] = env->tgpr[2];
                     36:     env->tgpr[2] = tmp;
                     37:     tmp = env->gpr[3];
                     38:     env->gpr[3] = env->tgpr[3];
                     39:     env->tgpr[3] = tmp;
                     40: }
                     41: 
1.1.1.4 ! root       42: static inline void hreg_compute_mem_idx(CPUPPCState *env)
1.1       root       43: {
                     44:     /* Precompute MMU index */
                     45:     if (msr_pr == 0 && msr_hv != 0) {
                     46:         env->mmu_idx = 2;
                     47:     } else {
                     48:         env->mmu_idx = 1 - msr_pr;
                     49:     }
                     50: }
                     51: 
1.1.1.4 ! root       52: static inline void hreg_compute_hflags(CPUPPCState *env)
1.1       root       53: {
                     54:     target_ulong hflags_mask;
                     55: 
                     56:     /* We 'forget' FE0 & FE1: we'll never generate imprecise exceptions */
                     57:     hflags_mask = (1 << MSR_VR) | (1 << MSR_AP) | (1 << MSR_SA) |
                     58:         (1 << MSR_PR) | (1 << MSR_FP) | (1 << MSR_SE) | (1 << MSR_BE) |
                     59:         (1 << MSR_LE);
                     60:     hflags_mask |= (1ULL << MSR_CM) | (1ULL << MSR_SF) | MSR_HVB;
                     61:     hreg_compute_mem_idx(env);
                     62:     env->hflags = env->msr & hflags_mask;
                     63:     /* Merge with hflags coming from other registers */
                     64:     env->hflags |= env->hflags_nmsr;
                     65: }
                     66: 
1.1.1.4 ! root       67: static inline int hreg_store_msr(CPUPPCState *env, target_ulong value,
        !            68:                                  int alter_hv)
1.1       root       69: {
                     70:     int excp;
                     71: 
                     72:     excp = 0;
                     73:     value &= env->msr_mask;
                     74: #if !defined (CONFIG_USER_ONLY)
                     75:     if (!alter_hv) {
                     76:         /* mtmsr cannot alter the hypervisor state */
                     77:         value &= ~MSR_HVB;
                     78:         value |= env->msr & MSR_HVB;
                     79:     }
                     80:     if (((value >> MSR_IR) & 1) != msr_ir ||
                     81:         ((value >> MSR_DR) & 1) != msr_dr) {
                     82:         /* Flush all tlb when changing translation mode */
                     83:         tlb_flush(env, 1);
                     84:         excp = POWERPC_EXCP_NONE;
                     85:         env->interrupt_request |= CPU_INTERRUPT_EXITTB;
                     86:     }
                     87:     if (unlikely((env->flags & POWERPC_FLAG_TGPR) &&
                     88:                  ((value ^ env->msr) & (1 << MSR_TGPR)))) {
                     89:         /* Swap temporary saved registers with GPRs */
                     90:         hreg_swap_gpr_tgpr(env);
                     91:     }
                     92:     if (unlikely((value >> MSR_EP) & 1) != msr_ep) {
                     93:         /* Change the exception prefix on PowerPC 601 */
                     94:         env->excp_prefix = ((value >> MSR_EP) & 1) * 0xFFF00000;
                     95:     }
                     96: #endif
                     97:     env->msr = value;
                     98:     hreg_compute_hflags(env);
                     99: #if !defined (CONFIG_USER_ONLY)
                    100:     if (unlikely(msr_pow == 1)) {
                    101:         if ((*env->check_pow)(env)) {
                    102:             env->halted = 1;
                    103:             excp = EXCP_HALTED;
                    104:         }
                    105:     }
                    106: #endif
                    107: 
                    108:     return excp;
                    109: }
                    110: 
                    111: #endif /* !defined(__HELPER_REGS_H__) */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.