src/runtime/ppc-arch.h

   1 #ifndef _PPC_ARCH_H
   2 #define _PPC_ARCH_H
   3
   4 static inline long
   5 get_spinlock(lispobj *word,long value)
   6 {
   7 #ifdef LISP_FEATURE_SB_THREAD
   8     long temp;
   9
  10     asm volatile("1: lwarx %0,0,%1;"
  11                  "   cmpwi %0,0;"
  12                  "   bne- 1b;"
  13                  "   stwcx. %2,0,%1;"
  14                  "   bne- 1b;"
  15                  "   isync"
  16                  : "=&r" (temp)
  17                  : "r" (word), "r" (value)
  18                  : "cr0", "memory");
  19     return temp;
  20 #else
  21     *word=value;
  22     return 0;
  23 #endif
  24 }
  25
  26 static inline void
  27 release_spinlock(lispobj *word)
  28 {
  29 #ifdef LISP_FEATURE_SB_THREAD
  30     asm volatile ("sync" : : : "memory");
  31 #endif
  32     *word=0;
  33 }
  34
  35 #ifdef LISP_FEATURE_SB_THREAD
  36 static inline lispobj
  37 swap_lispobjs(volatile lispobj *dest, lispobj value)
  38 {
  39     lispobj old_value;
  40     asm volatile ("1: lwarx %0,0,%1;"
  41                   "   stwcx. %2,0,%1;"
  42                   "   bne- 1b;"
  43                   "   isync"
  44          : "=&r" (old_value)
  45          : "r" (dest), "r" (value)
  46          : "cr0", "memory");
  47     return old_value;
  48 }
  49 #endif
  50
  51 #define ARCH_HAS_LINK_REGISTER
  52 #define ALIEN_STACK_GROWS_DOWNWARD
  53
  54 extern void ppc_flush_icache(os_vm_address_t address, os_vm_size_t length);
  55
  56 os_context_register_t *os_context_ctr_addr(os_context_t *context);
  57 os_context_register_t *os_context_cr_addr(os_context_t *context);
  58
  59 #endif /* _PPC_ARCH_H */