patch-1.3.45 linux/include/asm-ppc/system.h

• Lines: 77
• Date: Sat Nov 25 19:49:07 1995
• Orig file: v1.3.44/linux/include/asm-ppc/system.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.44/linux/include/asm-ppc/system.h linux/include/asm-ppc/system.h
@@ -0,0 +1,76 @@
+#ifndef __PPC_SYSTEM_H
+#define __PPC_SYSTEM_H
+
+#if 0
+#define mb() \
+__asm__ __volatile__("mb": : :"memory")
+#endif
+#define mb()  __asm__ __volatile__ (""   : : :"memory")
+
+
+extern void __save_flags(long *flags);
+extern void __restore_flags(long flags);
+extern void sti(void);
+extern void cli(void);
+extern int _disable_interrupts(void);
+extern void _enable_interrupts(int);
+
+/*extern void memcpy(void *, void *, int);*/
+extern void bzero(void *, int);
+
+struct task_struct;
+extern void switch_to(struct task_struct *);
+
+#define save_flags(flags) __save_flags(&(flags))
+#define restore_flags(flags) __restore_flags(flags)
+
+#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+/* this guy lives in arch/ppc/kernel */
+extern inline unsigned long *xchg_u32(void *m, unsigned long val);
+
+/*
+ *  these guys don't exist.
+ *  someone should create them.
+ *              -- Cort
+ */
+extern void *xchg_u64(void *ptr, unsigned long val);
+extern int xchg_u8(char *m, char val);
+
+/*
+ * This function doesn't exist, so you'll get a linker error
+ * if something tries to do an invalid xchg().
+ *
+ * This only works if the compiler isn't horribly bad at optimizing.
+ * gcc-2.5.8 reportedly can't handle this, but as that doesn't work
+ * too well on the alpha anyway..
+ */
+extern void __xchg_called_with_bad_pointer(void);
+
+static inline unsigned long __xchg(unsigned long x, void * ptr, int size)
+{
+	switch (size) {
+		case 4:
+			return (unsigned long )xchg_u32(ptr, x);
+		case 8:
+			return (unsigned long )xchg_u64(ptr, x);
+	}
+	__xchg_called_with_bad_pointer();
+	return x;
+
+
+}
+
+
+
+extern inline int tas(char * m)
+{
+	return xchg_u8(m,1);
+}
+
+extern inline void * xchg_ptr(void * m, void * val)
+{
+	return (void *) xchg_u32(m, (unsigned long) val);
+}
+
+#endif