gencgc: More precise conservatism for pointers to boxed pages.

[sbcl.git] / src / runtime / ppc-arch.h

diff --git a/src/runtime/ppc-arch.h b/src/runtime/ppc-arch.h
index a811ac4..a5fe1e9 100644 (file)
--- a/src/runtime/ppc-arch.h
+++ b/src/runtime/ppc-arch.h
@@ -1,19 +1,59 @@
 #ifndef _PPC_ARCH_H
 #define _PPC_ARCH_H
 
-static inline void 
+static inline long
 get_spinlock(lispobj *word,long value)
 {
-    *word=value;               /* FIXME for threads */
+#ifdef LISP_FEATURE_SB_THREAD
+    long temp;
+
+    asm volatile("1: lwarx %0,0,%1;"
+                 "   cmpwi %0,0;"
+                 "   bne- 1b;"
+                 "   stwcx. %2,0,%1;"
+                 "   bne- 1b;"
+                 "   isync"
+                 : "=&r" (temp)
+                 : "r" (word), "r" (value)
+                 : "cr0", "memory");
+    return temp;
+#else
+    *word=value;
+    return 0;
+#endif
 }
 
 static inline void
 release_spinlock(lispobj *word)
 {
+#ifdef LISP_FEATURE_SB_THREAD
+    asm volatile ("sync" : : : "memory");
+#endif
     *word=0;
 }
 
+#ifdef LISP_FEATURE_SB_THREAD
+static inline lispobj
+swap_lispobjs(volatile lispobj *dest, lispobj value)
+{
+    lispobj old_value;
+    asm volatile ("1: lwarx %0,0,%1;"
+                  "   stwcx. %2,0,%1;"
+                  "   bne- 1b;"
+                  "   isync"
+         : "=&r" (old_value)
+         : "r" (dest), "r" (value)
+         : "cr0", "memory");
+    return old_value;
+}
+#endif
 
 #define ARCH_HAS_LINK_REGISTER
+#define ALIEN_STACK_GROWS_DOWNWARD
+
+extern void ppc_flush_icache(os_vm_address_t address, os_vm_size_t length);
+
+os_context_register_t *os_context_ctr_addr(os_context_t *context);
+os_context_register_t *os_context_cr_addr(os_context_t *context);
 
 #endif /* _PPC_ARCH_H */