patch-2.1.80 linux/include/asm-arm/proc-armo/system.h

• Lines: 125
• Date: Tue Jan 20 16:39:42 1998
• Orig file: v2.1.79/linux/include/asm-arm/proc-armo/system.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/include/asm-arm/proc-armo/system.h linux/include/asm-arm/proc-armo/system.h
@@ -0,0 +1,124 @@
+/*
+ * linux/include/asm-arm/proc-armo/system.h
+ *
+ * Copyright (C) 1995, 1996 Russell King
+ */
+
+#ifndef __ASM_PROC_SYSTEM_H
+#define __ASM_PROC_SYSTEM_H
+
+extern const char xchg_str[];
+
+#include <asm/proc-fns.h>
+
+extern __inline__ unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
+{
+	switch (size) {
+		case 1:	return processor.u.armv2._xchg_1(x, ptr);
+		case 2:	return processor.u.armv2._xchg_2(x, ptr);
+		case 4:	return processor.u.armv2._xchg_4(x, ptr);
+		default: arm_invalidptr(xchg_str, size);
+	}
+}
+
+/*
+ * We need to turn the caches off before calling the reset vector - RiscOS
+ * messes up if we don't
+ */
+#define proc_hard_reset()	processor._proc_fin()
+
+/*
+ * This processor does not idle
+ */
+#define proc_idle()
+
+/*
+ * A couple of speedups for the ARM
+ */
+
+/*
+ * Save the current interrupt enable state & disable IRQs
+ */
+#define __save_flags_cli(x)		\
+	do {				\
+	  unsigned long temp;		\
+	  __asm__ __volatile__(		\
+"	mov	%0, pc\n"		\
+"	orr	%1, %0, #0x08000000\n"	\
+"	and	%0, %0, #0x0c000000\n"	\
+"	teqp	%1, #0\n"		\
+	  : "=r" (x), "=r" (temp)	\
+	  :				\
+	  : "memory");			\
+	} while (0)
+	
+/*
+ * Enable IRQs
+ */
+#define __sti()				\
+	do {				\
+	  unsigned long temp;		\
+	  __asm__ __volatile__(		\
+"	mov	%0, pc\n"		\
+"	bic	%0, %0, #0x08000000\n"	\
+"	teqp	%0, #0\n"		\
+	  : "=r" (temp)			\
+	  :				\
+	  : "memory");			\
+	} while(0)
+
+/*
+ * Disable IRQs
+ */
+#define __cli()				\
+	do {				\
+	  unsigned long temp;		\
+	  __asm__ __volatile__(		\
+"	mov	%0, pc\n"		\
+"	orr	%0, %0, #0x08000000\n"	\
+"	teqp	%0, #0\n"		\
+	  : "=r" (temp)			\
+	  :				\
+	  : "memory");			\
+	} while(0)
+
+/*
+ * save current IRQ & FIQ state
+ */
+#define __save_flags(x)			\
+	do {				\
+	  __asm__ __volatile__(		\
+"	mov	%0, pc\n"		\
+"	and	%0, %0, #0x0c000000\n"	\
+	  : "=r" (x));			\
+	} while (0)
+
+/*
+ * restore saved IRQ & FIQ state
+ */
+#define __restore_flags(x)		\
+	do {				\
+	  unsigned long temp;		\
+	  __asm__ __volatile__(		\
+"	mov	%0, pc\n"		\
+"	bic	%0, %0, #0x0c000000\n"	\
+"	orr	%0, %0, %1\n"		\
+"	teqp	%0, #0\n"		\
+	  : "=r" (temp)			\
+	  : "r" (x)			\
+	  : "memory");			\
+	} while (0)
+
+#ifdef __SMP__
+#error SMP not supported
+#else
+
+#define cli() __cli()
+#define sti() __sti()
+#define save_flags(x)		__save_flags(x)
+#define restore_flags(x)	__restore_flags(x)
+#define save_flags_cli(x)	__save_flags_cli(x)
+
+#endif
+
+#endif