From: Wen Congyang <wency@cn.fujitsu.com>
Date: Mon, 7 May 2012 04:05:42 +0000 (+0800)
Subject: Add API to check whether paging mode is enabled
X-Git-Tag: TizenStudio_2.0_p2.3.2~208^2~4038^2~25
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=31a2207a8e1c39bcf88e527ac62f4e12316920a4;p=sdk%2Femulator%2Fqemu.git

Add API to check whether paging mode is enabled

This API will be used in the following patch.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---

diff --git a/cpu-all.h b/cpu-all.h
index 2688bac..76439b4 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -527,12 +527,18 @@ int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
 
 #if defined(CONFIG_HAVE_GET_MEMORY_MAPPING)
 int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env);
+bool cpu_paging_enabled(CPUArchState *env);
 #else
 static inline int cpu_get_memory_mapping(MemoryMappingList *list,
                                          CPUArchState *env)
 {
     return -1;
 }
+
+static inline bool cpu_paging_enabled(CPUArchState *env)
+{
+    return true;
+}
 #endif
 
 #endif /* CPU_ALL_H */
diff --git a/target-i386/arch_memory_mapping.c b/target-i386/arch_memory_mapping.c
index dd64bec..bd50e11 100644
--- a/target-i386/arch_memory_mapping.c
+++ b/target-i386/arch_memory_mapping.c
@@ -233,7 +233,7 @@ static void walk_pml4e(MemoryMappingList *list,
 
 int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env)
 {
-    if (!(env->cr[0] & CR0_PG_MASK)) {
+    if (!cpu_paging_enabled(env)) {
         /* paging is disabled */
         return 0;
     }
@@ -264,3 +264,8 @@ int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env)
 
     return 0;
 }
+
+bool cpu_paging_enabled(CPUArchState *env)
+{
+    return env->cr[0] & CR0_PG_MASK;
+}