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nds32: Miscellaneous header files

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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>
This commit is contained in:
Greentime Hu 2017-10-25 14:58:32 +08:00
parent beebdeaa1d
commit 5c86fa7f7f
3 changed files with 63 additions and 0 deletions
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39
arch/nds32/include/asm/delay.h Normal file
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// 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

11
arch/nds32/include/asm/linkage.h Normal file
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// 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

13
arch/nds32/include/uapi/asm/byteorder.h Normal file
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// 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__ */