[PATCH v4 25/36] nds32: Miscellaneous header files
From: Greentime Hu <hidden>
Date: 2017-12-18 07:13:50
Also in:
linux-arch, linux-devicetree, linux-serial, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Greentime Hu <redacted> This patch introduces some miscellaneous header files. Signed-off-by: Vincent Chen <redacted> Signed-off-by: Greentime Hu <redacted> --- arch/nds32/include/asm/delay.h | 38 +++++++++++++++++++++++++++++++ arch/nds32/include/asm/linkage.h | 11 +++++++++ arch/nds32/include/uapi/asm/byteorder.h | 13 +++++++++++ 3 files changed, 62 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 0000000..1852a4e
--- /dev/null
+++ b/arch/nds32/include/asm/delay.h@@ -0,0 +1,38 @@ +// 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> + +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 0000000..e708c8b
--- /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 0000000..a23f6f3a
--- /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__ */
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1.7.9.5