Changeset 84757b5 in mainline

Timestamp:

2006-12-13T14:17:37Z (18 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f19d77a

Parents:

449dc1ed

Message:

get_cycle() for PPC32

File:

• kernel/arch/ppc32/include/cycle.h (modified) (1 diff)

kernel/arch/ppc32/include/cycle.h

@@ -38 +38 @@
 static inline uint64_t get_cycle(void)
 {
-        return 0;
+        uint32_t lower;
+        uint32_t upper;
+        uint32_t upper2;
+        
+        asm volatile (
+                "1: mftbu %0\n"
+                "mftb %1\n"
+                "mftbu %2\n"
+                "cmpw %0, %2\n"
+                "bne- 1b\n"
+                : "=r" (upper),
+                  "=r" (lower),
+                  "=r" (upper2)
+                :: "cr0"
+        );
+        
+        return ((uint64_t) upper << 32) + (uint64_t) lower;
 }