#include <linux/kernel.h>
#include <asm/hw_irq.h>
-#include <asm/ppc_asm.h>
#include <asm/atomic.h>
/*
extern unsigned int rtas_data;
extern int mem_init_done; /* set on boot once kmalloc can be called */
+extern unsigned long memory_limit;
+extern unsigned long klimit;
extern int powersave_nap; /* set if nap mode can be used in idle loop */
#ifdef CONFIG_PPC64
static __inline__ unsigned long
-__cmpxchg_u64(volatile long *p, unsigned long old, unsigned long new)
+__cmpxchg_u64(volatile unsigned long *p, unsigned long old, unsigned long new)
{
unsigned long prev;
#define PTRRELOC(x) ((typeof(x)) add_reloc_offset((unsigned long)(x)))
+static inline void create_instruction(unsigned long addr, unsigned int instr)
+{
+ unsigned int *p;
+ p = (unsigned int *)addr;
+ *p = instr;
+ asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (p));
+}
+
+/* Flags for create_branch:
+ * "b" == create_branch(addr, target, 0);
+ * "ba" == create_branch(addr, target, BRANCH_ABSOLUTE);
+ * "bl" == create_branch(addr, target, BRANCH_SET_LINK);
+ * "bla" == create_branch(addr, target, BRANCH_ABSOLUTE | BRANCH_SET_LINK);
+ */
+#define BRANCH_SET_LINK 0x1
+#define BRANCH_ABSOLUTE 0x2
+
+static inline void create_branch(unsigned long addr,
+ unsigned long target, int flags)
+{
+ unsigned int instruction;
+
+ if (! (flags & BRANCH_ABSOLUTE))
+ target = target - addr;
+
+ /* Mask out the flags and target, so they don't step on each other. */
+ instruction = 0x48000000 | (flags & 0x3) | (target & 0x03FFFFFC);
+
+ create_instruction(addr, instruction);
+}
+
+static inline void create_function_call(unsigned long addr, void * func)
+{
+ unsigned long func_addr;
+
+#ifdef CONFIG_PPC64
+ /*
+ * On PPC64 the function pointer actually points to the function's
+ * descriptor. The first entry in the descriptor is the address
+ * of the function text.
+ */
+ func_addr = *(unsigned long *)func;
+#else
+ func_addr = (unsigned long)func;
+#endif
+ create_branch(addr, func_addr, BRANCH_SET_LINK);
+}
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_SYSTEM_H */