halt state support for ppc

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1657 c046a42c-6fe2-441c-8c8c-71466251a162

cpu-exec.c

@@ -262,6 +262,16 @@ int cpu_exec(CPUState *env1)
             return EXCP_HALTED;
         }
     }
+#elif defined(TARGET_PPC)
+    if (env1->msr[MSR_POW]) {
+        if (env1->msr[MSR_EE] && 
+            (env1->interrupt_request & 
+             (CPU_INTERRUPT_HARD | CPU_INTERRUPT_TIMER))) {
+            env1->msr[MSR_POW] = 0;
+        } else {
+            return EXCP_HALTED;
+        }
+    }
 #endif
 
     cpu_single_env = env1; 

monitor.c

@@ -255,6 +255,10 @@ static void do_info_cpus(void)
         term_printf(" pc=0x" TARGET_FMT_lx, env->eip + env->segs[R_CS].base);
         if (env->hflags & HF_HALTED_MASK)
             term_printf(" (halted)");
+#elif defined(TARGET_PPC)
+        term_printf(" nip=0x" TARGET_FMT_lx, env->nip);
+        if (msr_pow)
+            term_printf(" (halted)");
 #endif
         term_printf("\n");
     }

target-ppc/helper.c

@@ -846,6 +846,11 @@ void do_store_msr (CPUPPCState *env, target_ulong value)
     msr_ri  = (value >> MSR_RI)  & 1;
     msr_le  = (value >> MSR_LE)  & 1;
     do_compute_hflags(env);
+    if (msr_pow) {
+        /* power save: exit cpu loop */
+        env->exception_index = EXCP_HLT;
+        cpu_loop_exit();
+    }
 }
 
 float64 do_load_fpscr (CPUPPCState *env)

target-ppc/translate.c

@@ -2097,10 +2097,11 @@ GEN_HANDLER(mtmsr, 0x1F, 0x12, 0x04, 0x001FF801, PPC_MISC)
         RET_PRIVREG(ctx);
         return;
     }
+    gen_op_update_nip((ctx)->nip);
     gen_op_load_gpr_T0(rS(ctx->opcode));
     gen_op_store_msr();
     /* Must stop the translation as machine state (may have) changed */
-    RET_STOP(ctx);
+    RET_CHG_FLOW(ctx);
 #endif
 }