added cpu_get_tsc()

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@837 c046a42c-6fe2-441c-8c8c-71466251a162

hw/pc.c

@@ -57,6 +57,13 @@ static void ioportF0_write(void *opaque, uint32_t addr, uint32_t data)
     pic_set_irq(13, 0);
 }
 
+/* TSC handling */
+
+uint64_t cpu_get_tsc(CPUX86State *env)
+{
+    return qemu_get_clock(vm_clock);
+}
+
 /* PC cmos mappings */
 
 #define REG_EQUIPMENT_BYTE          0x14

linux-user/main.c

@@ -99,10 +99,50 @@ int cpu_get_pic_interrupt(CPUState *env)
     return -1;
 }
 
+/* timers for rdtsc */
+
+#if defined(__i386__)
+
+int64_t cpu_get_real_ticks(void)
+{
+    int64_t val;
+    asm volatile ("rdtsc" : "=A" (val));
+    return val;
+}
+
+#elif defined(__x86_64__)
+
+int64_t cpu_get_real_ticks(void)
+{
+    uint32_t low,high;
+    int64_t val;
+    asm volatile("rdtsc" : "=a" (low), "=d" (high));
+    val = high;
+    val <<= 32;
+    val |= low;
+    return val;
+}
+
+#else
+
+static uint64_t emu_time;
+
+int64_t cpu_get_real_ticks(void)
+{
+    return emu_time++;
+}
+
+#endif
+
 #ifdef TARGET_I386
 /***********************************************************/
 /* CPUX86 core interface */
 
+uint64_t cpu_get_tsc(CPUX86State *env)
+{
+    return cpu_get_real_ticks();
+}
+
 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 
                      int flags)
 {

target-i386/cpu.h

@@ -443,6 +443,8 @@ int cpu_x86_signal_handler(int host_signum, struct siginfo *info,
                            void *puc);
 void cpu_x86_set_a20(CPUX86State *env, int a20_state);
 
+uint64_t cpu_get_tsc(CPUX86State *env);
+
 /* will be suppressed */
 void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
 

target-i386/helper.c

@@ -1775,20 +1775,11 @@ void helper_invlpg(unsigned int addr)
     cpu_x86_flush_tlb(env, addr);
 }
 
-/* rdtsc */
-#if !defined(__i386__) && !defined(__x86_64__)
-uint64_t emu_time;
-#endif
-
 void helper_rdtsc(void)
 {
     uint64_t val;
-#if defined(__i386__) || defined(__x86_64__)
+    
-    asm volatile ("rdtsc" : "=A" (val));
+    val = cpu_get_tsc(env);
-#else
-    /* better than nothing: the time increases */
-    val = emu_time++;
-#endif
     EAX = val;
     EDX = val >> 32;
 }

tests/qruncom.c

@@ -55,6 +55,11 @@ int cpu_get_pic_interrupt(CPUState *env)
     return -1;
 }
 
+uint64_t cpu_get_tsc(CPUState *env)
+{
+    return 0;
+}
+
 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 
                      unsigned long addr, unsigned int sel)
 {