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Subject[PATCH v7 28/37] nds32: Miscellaneous header files
Date
This patch introduces some miscellaneous header files.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
arch/nds32/include/asm/delay.h | 39 +++++++++++++++++++++++++++++++++
arch/nds32/include/asm/linkage.h | 11 ++++++++++
arch/nds32/include/uapi/asm/byteorder.h | 13 +++++++++++
3 files changed, 63 insertions(+)
create mode 100644 arch/nds32/include/asm/delay.h
create mode 100644 arch/nds32/include/asm/linkage.h
create mode 100644 arch/nds32/include/uapi/asm/byteorder.h

diff --git a/arch/nds32/include/asm/delay.h b/arch/nds32/include/asm/delay.h
new file mode 100644
index 000000000000..519ba97acb6e
--- /dev/null
+++ b/arch/nds32/include/asm/delay.h
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#ifndef __NDS32_DELAY_H__
+#define __NDS32_DELAY_H__
+
+#include <asm/param.h>
+
+/* There is no clocksource cycle counter in the CPU. */
+static inline void __delay(unsigned long loops)
+{
+ __asm__ __volatile__(".align 2\n"
+ "1:\n"
+ "\taddi\t%0, %0, -1\n"
+ "\tbgtz\t%0, 1b\n"
+ :"=r"(loops)
+ :"0"(loops));
+}
+
+static inline void __udelay(unsigned long usecs, unsigned long lpj)
+{
+ usecs *= (unsigned long)(((0x8000000000000000ULL / (500000 / HZ)) +
+ 0x80000000ULL) >> 32);
+ usecs = (unsigned long)(((unsigned long long)usecs * lpj) >> 32);
+ __delay(usecs);
+}
+
+#define udelay(usecs) __udelay((usecs), loops_per_jiffy)
+
+/* make sure "usecs *= ..." in udelay do not overflow. */
+#if HZ >= 1000
+#define MAX_UDELAY_MS 1
+#elif HZ <= 200
+#define MAX_UDELAY_MS 5
+#else
+#define MAX_UDELAY_MS (1000 / HZ)
+#endif
+
+#endif
diff --git a/arch/nds32/include/asm/linkage.h b/arch/nds32/include/asm/linkage.h
new file mode 100644
index 000000000000..e708c8bdb926
--- /dev/null
+++ b/arch/nds32/include/asm/linkage.h
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#ifndef __ASM_LINKAGE_H
+#define __ASM_LINKAGE_H
+
+/* This file is required by include/linux/linkage.h */
+#define __ALIGN .align 2
+#define __ALIGN_STR ".align 2"
+
+#endif
diff --git a/arch/nds32/include/uapi/asm/byteorder.h b/arch/nds32/include/uapi/asm/byteorder.h
new file mode 100644
index 000000000000..a23f6f3a2468
--- /dev/null
+++ b/arch/nds32/include/uapi/asm/byteorder.h
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#ifndef __NDS32_BYTEORDER_H__
+#define __NDS32_BYTEORDER_H__
+
+#ifdef __NDS32_EB__
+#include <linux/byteorder/big_endian.h>
+#else
+#include <linux/byteorder/little_endian.h>
+#endif
+
+#endif /* __NDS32_BYTEORDER_H__ */
--
2.16.1
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