[PATCH 52/54] Add arch/nios2/include/asm/system.h

[franck.jullien at gmail.com]

From: Franck JULLIEN <franck.jullien at gmail.com>

Add arch/nios2/include/asm/system.h

---
 arch/nios2/include/asm/system.h |   64 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 64 insertions(+), 0 deletions(-)
 create mode 100644 arch/nios2/include/asm/system.h

diff --git a/arch/nios2/include/asm/system.h b/arch/nios2/include/asm/system.h
new file mode 100644
index 0000000..086d92b
--- /dev/null
+++ b/arch/nios2/include/asm/system.h
@@ -0,0 +1,64 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt at psyent.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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef __ASM_NIOS2_SYSTEM_H_
+#define __ASM_NIOS2_SYSTEM_H_
+
+#define local_irq_enable() __asm__ __volatile__ (  \
+	"rdctl	r8, status\n"			   \
+	"ori	r8, r8, 1\n"			   \
+	"wrctl	status, r8\n"			   \
+	: : : "r8")
+
+#define local_irq_disable() __asm__ __volatile__ ( \
+	"rdctl	r8, status\n"			   \
+	"andi	r8, r8, 0xfffe\n"		   \
+	"wrctl	status, r8\n"			   \
+	: : : "r8")
+
+#define local_save_flags(x) __asm__ __volatile__ (	\
+	"rdctl	r8, status\n"				\
+	"mov	%0, r8\n"				\
+	: "=r" (x) : : "r8", "memory")
+
+#define local_irq_restore(x) __asm__ __volatile__ (	\
+	"mov	r8, %0\n"				\
+	"wrctl	status, r8\n"				\
+	: : "r" (x) : "r8", "memory")
+
+/* For spinlocks etc */
+#define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \
+	while (0)
+
+#define	irqs_disabled()					\
+({							\
+	unsigned long flags;				\
+	local_save_flags(flags);			\
+	((flags & NIOS2_STATUS_PIE_MSK) == 0x0);	\
+})
+
+/* indirect call to go beyond 256MB limitation of toolchain */
+#define nios2_callr(addr) __asm__ __volatile__ (	\
+	"callr	%0"					\
+	: : "r" (addr))
+
+#endif /* __ASM_NIOS2_SYSTEM_H */
-- 
1.7.3.4