Import of Linux/MIPS 1.3.0

1 files changed, 53 insertions, 0 deletions

diff --git a/include/asm-m68k/system.h b/include/asm-m68k/system.h
new file mode 100644
index 000000000..e987f1f46
--- /dev/null
+++ b/include/asm-m68k/system.h
@@ -0,0 +1,53 @@
+/*
+ *  linux/include/asm-m68k/system.h
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file README.legal in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * 680x0 support added by Hamish Macdonald
+ */
+
+#ifndef _M68K_SYSTEM_H
+#define _M68K_SYSTEM_H
+
+#include <linux/config.h> /* get configuration macros */
+
+#if defined(CONFIG_ATARI) && !defined(CONFIG_AMIGA) && !defined(CONFIG_MAC)
+/* block out HSYNC on the atari */
+#define sti() __asm__ __volatile__ ("andiw #0xfbff,sr": : : "memory")
+#else /* portable version */
+#define sti() __asm__ __volatile__ ("andiw #0xf8ff,sr": : : "memory")
+#endif /* machine compilation types */ 
+#define cli() __asm__ __volatile__ ("oriw  #0x0700,sr": : : "memory")
+#define nop() __asm__ __volatile__ ("nop"::)
+
+#define save_flags(x) \
+__asm__ __volatile__("movew sr,%0":"=d" (x) : /* no input */ :"memory")
+
+#define restore_flags(x) \
+__asm__ __volatile__("movew %0,sr": /* no outputs */ :"d" (x) : "memory")
+
+#define iret() __asm__ __volatile__ ("rte": : :"memory", "sp", "cc")
+
+#define move_to_user_mode() \
+    __asm__ __volatile__ ("movel sp,usp\n\t"     /* setup user sp       */ \
+			  "movec %0,msp\n\t"     /* setup kernel sp     */ \
+			  "andiw #0xdfff,sr"     /* return to user mode */ \
+			  : /* no output */                                \
+			  : "r" (current->kernel_stack_page + PAGE_SIZE)   \
+			  : "memory", "sp")
+
+static inline void clear_fpu(void) {
+	unsigned long nilstate = 0;
+	__asm__ __volatile__ ("frestore %0@" : : "a" (&nilstate));
+}
+
+#define halt() \
+        __asm__ __volatile__ ("halt")
+
+#endif /* _M68K_SYSTEM_H */