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Date: Mon, 15 Jan 2018 13:53:35 +0800 From: Greentime Hu <green.hu@...il.com> To: greentime@...estech.com, linux-kernel@...r.kernel.org, arnd@...db.de, linux-arch@...r.kernel.org, tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com, robh+dt@...nel.org, netdev@...r.kernel.org, deanbo422@...il.com, devicetree@...r.kernel.org, viro@...iv.linux.org.uk, dhowells@...hat.com, will.deacon@....com, daniel.lezcano@...aro.org, linux-serial@...r.kernel.org, geert.uytterhoeven@...il.com, linus.walleij@...aro.org, mark.rutland@....com, greg@...ah.com, ren_guo@...ky.com, rdunlap@...radead.org, davem@...emloft.net, jonas@...thpole.se, stefan.kristiansson@...nalahti.fi, shorne@...il.com Cc: green.hu@...il.com, Vincent Chen <vincentc@...estech.com> Subject: [PATCH v6 27/36] nds32: Miscellaneous header files From: Greentime Hu <greentime@...estech.com> This patch introduces some miscellaneous header files. Signed-off-by: Vincent Chen <vincentc@...estech.com> Signed-off-by: Greentime Hu <greentime@...estech.com> --- 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 0000000..519ba97 --- /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 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__ */ -- 1.7.9.5
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