nds32: add header files support for nds32
Add generic header files support for nds32 architecture.
Cache, ptregs, data type and other definitions are included.
Signed-off-by: Macpaul Lin <macpaul@andestech.com>
diff --git a/arch/nds32/include/asm/system.h b/arch/nds32/include/asm/system.h
new file mode 100644
index 0000000..97f59e9
--- /dev/null
+++ b/arch/nds32/include/asm/system.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __ASM_NDS_SYSTEM_H
+#define __ASM_NDS_SYSTEM_H
+
+/*
+ * Interrupt configuring macros.
+ */
+
+extern int irq_flags;
+
+#define local_irq_enable() \
+ __asm__ __volatile__ ( \
+ "mfsr %0, $psw\n\t" \
+ "andi %0, %0, 0x1\n\t" \
+ "setgie.e\n\t" \
+ : \
+ : "r" (irq_flags) \
+ )
+
+#define local_irq_disable() \
+ do { \
+ int __tmp_dummy; \
+ __asm__ __volatile__ ( \
+ "mfsr %0, $psw\n\t" \
+ "andi %0, %0, 0x1\n\t" \
+ "setgie.d\n\t" \
+ "dsb\n\t" \
+ : "=r" (__tmp_dummy) \
+ ); \
+ } while (0)
+
+#define local_irq_save(x) \
+ __asm__ __volatile__ ( \
+ "mfsr %0, $psw\n\t" \
+ "andi %0, %0, 0x1\n\t" \
+ "setgie.d\n\t" \
+ "dsb\n\t" \
+ : "=&r" (x) \
+ )
+
+#define local_save_flags(x) \
+ __asm__ __volatile__ ( \
+ "mfsr %0, $psw\n\t" \
+ "andi %0, %0, 0x1\n\t" \
+ "setgie.e\n\t" \
+ "setgie.d\n\t" \
+ : "=r" (x) \
+ )
+
+#define irqs_enabled_from_flags(x) ((x) != 0x1f)
+
+#define local_irq_restore(x) \
+ do { \
+ if (irqs_enabled_from_flags(x)) \
+ local_irq_enable(); \
+ } while (0)
+
+/*
+ * Force strict CPU ordering.
+ */
+#define nop() asm volatile ("nop;\n\t" : : )
+#define mb() asm volatile ("" : : : "memory")
+#define rmb() asm volatile ("" : : : "memory")
+#define wmb() asm volatile ("" : : : "memory")
+
+#endif /* __ASM_NDS_SYSTEM_H */