X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Finclude%2Fpalacios%2Fvmm_util.h;h=95a0c8e3ad11437f1b79b0b76aa3bb22c9e4a1b7;hp=323b977f2356cc449967beec8da9ef4bdc3bb30c;hb=d8fc6aa4bc2a5d9cec50923e9d2bd30f867dd50a;hpb=639fdba00d36b2a60fad3d28703459354cf8744f

diff --git a/palacios/include/palacios/vmm_util.h b/palacios/include/palacios/vmm_util.h
index 323b977..95a0c8e 100644
--- a/palacios/include/palacios/vmm_util.h
+++ b/palacios/include/palacios/vmm_util.h
@@ -42,4 +42,79 @@ void PrintTraceHex(unsigned char x);
 void PrintTraceMemDump(unsigned char * start, int n);
 
 
+
+
+#define rdtsc(low,high)						\
+     __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
+
+#define rdtscl(low)						\
+     __asm__ __volatile__("rdtsc" : "=a" (low) : : "edx")
+
+#if defined(__i386__)
+
+#define rdtscll(val)				\
+     __asm__ __volatile__("rdtsc" : "=A" (val))
+
+#elif defined(__x86_64__)
+
+#define rdtscll(val) do {				    \
+    unsigned int a,d;					    \
+    asm volatile("rdtsc" : "=a" (a), "=d" (d));		    \
+    (val) = ((unsigned long)a) | (((unsigned long)d)<<32);  \
+  } while(0)
+
+#endif
+
+
+
+
+
+
+
+
+
+#ifdef __V3_64BIT__
+
+# define do_div(n,base) ({					\
+	uint32_t __base = (base);				\
+	uint32_t __rem;						\
+	__rem = ((uint64_t)(n)) % __base;			\
+	(n) = ((uint64_t)(n)) / __base;				\
+	__rem;							\
+ })
+
+#else
+
+/*
+ * do_div() is NOT a C function. It wants to return
+ * two values (the quotient and the remainder), but
+ * since that doesn't work very well in C, what it
+ * does is:
+ *
+ * - modifies the 64-bit dividend _in_place_
+ * - returns the 32-bit remainder
+ *
+ * This ends up being the most efficient "calling
+ * convention" on x86.
+ */
+#define do_div(n,base) ({ \
+	unsigned long __upper, __low, __high, __mod, __base; \
+	__base = (base); \
+	asm("":"=a" (__low), "=d" (__high):"A" (n)); \
+	__upper = __high; \
+	if (__high) { \
+		__upper = __high % (__base); \
+		__high = __high / (__base); \
+	} \
+	asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (__base), "0" (__low), "1" (__upper)); \
+	asm("":"=A" (n):"a" (__low),"d" (__high)); \
+	__mod; \
+})
+
+#endif
+
+
+
+
+
 #endif