initial 88k import; code by nivas and based on mach luna88k

1 files changed, 116 insertions, 0 deletions

diff --git a/sys/arch/mvme88k/include/asm_macro.h b/sys/arch/mvme88k/include/asm_macro.h
new file mode 100644
index 00000000000..ac51ebefee6
--- /dev/null
+++ b/sys/arch/mvme88k/include/asm_macro.h
@@ -0,0 +1,116 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1993-1991 Carnegie Mellon University
+ * Copyright (c) 1991 OMRON Corporation
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+/*
+ * HISTORY
+ * $Log: asm_macro.h,v $
+ * Revision 1.1  1995/10/18 10:54:22  deraadt
+ * Initial revision
+ *
+ * Revision 2.2  93/01/26  18:07:26  danner
+ * 	Created.
+ * 	[93/01/24            jfriedl]
+ * 
+ */
+
+#ifndef __M88K_ASM_MACRO_H__
+#define __M88K_ASM_MACRO_H__
+
+/*
+ ** Various compiler macros used for speed and efficiency.
+ ** Anyone can include.
+  */
+
+/*
+ * PSR_TYPE is the type of the Process Status Register.
+ */
+typedef unsigned long m88k_psr_type;
+
+/*
+ * disable_interrupts_return_psr()
+ *
+ *    The INTERRUPT_DISABLE bit is set in the PSR and the *PREVIOUS*
+ *    PSR is returned.  Intended to be used with set_psr() [below] as in:
+ *
+ *	{
+ *	    m88k_psr_type psr;
+ *	        .
+ *	        .
+ *	    psr = disable_interrupts_return_psr();
+ *	        .
+ *   		SHORT [time-wise] CRITICAL SECTION HERE
+ *	        .
+ *	    set_psr(psr);
+ *	        .
+ *	        .
+ */
+static inline m88k_psr_type disable_interrupts_return_psr(void)
+{
+    m88k_psr_type temp, oldpsr;
+    asm volatile (
+	"ldcr %0, cr1      \n"
+	"set  %1, %0, 1<1> \n"
+	"stcr %1, cr1      \n"
+	"tcnd ne0, r0, 0     " : "=r" (oldpsr), "=r" (temp));
+    return oldpsr;
+}
+#define disable_interrupt() (void)disable_interrupts_return_psr()
+
+/*
+ * Sets the PSR. See comments above.
+ */
+static inline void set_psr(m88k_psr_type psr)
+{
+    asm volatile ("stcr %0, cr1" :: "r" (psr));
+}
+
+/*
+ * Enables interrupts.
+ */
+static inline m88k_psr_type enable_interrupts_return_psr(void)
+{
+    m88k_psr_type temp, oldpsr; /* need a temporary register */
+    asm volatile (
+	"ldcr %0, cr1      \n"
+        "clr  %1, %0, 1<1> \n"
+        "stcr %1, cr1        " : "=r" (oldpsr), "=r" (temp));
+    return oldpsr;
+}
+#define enable_interrupt() (void)enable_interrupts_return_psr()
+
+#define db_enable_interrupt enable_interrupt
+#define db_disable_interrupt disable_interrupt
+
+/*
+ * flushes the data pipeline.
+ */
+static inline void flush_pipeline()
+{
+    asm volatile ("tcnd ne0, r0, 0");
+}
+#define db_flush_pipeline flush_pipeline
+
+#endif /* __M88K_ASM_MACRO_H__ */