[people/ms/u-boot.git] / include / usb / lin_gadget_compat.h

/*
 * Copyright (c) 2011 Samsung Electronics
 * Lukasz Majewski <l.majewski@samsung.com>
 *
 * This is a Linux kernel compatibility layer for USB Gadget
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef __LIN_COMPAT_H__
#define __LIN_COMPAT_H__

#include <linux/compat.h>

/* common */
#define BITS_PER_BYTE				8
#define BITS_TO_LONGS(nr) \
	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
#define DECLARE_BITMAP(name, bits) \
	unsigned long name[BITS_TO_LONGS(bits)]

#define small_const_nbits(nbits) \
	(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)

static inline void bitmap_zero(unsigned long *dst, int nbits)
{
	if (small_const_nbits(nbits))
		*dst = 0UL;
	else {
		int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
		memset(dst, 0, len);
	}
}

#define dma_cache_maint(addr, size, mode) cache_flush()
void cache_flush(void);

#endif /* __LIN_COMPAT_H__ */
Commit	Line	Data
38517a78 ŁM	1	/*
	2	* Copyright (c) 2011 Samsung Electronics
	3	* Lukasz Majewski <l.majewski@samsung.com>
	4	*
	5	* This is a Linux kernel compatibility layer for USB Gadget
	6	*
1a459660	7	* SPDX-License-Identifier: GPL-2.0+
38517a78 ŁM	8	*/
	9
	10	#ifndef __LIN_COMPAT_H__
	11	#define __LIN_COMPAT_H__
	12
6777a3cf MF	13	#include <linux/compat.h>
6777a3cf MF	14
38517a78	15	/* common */
7010f5b9 ŁM	16	#define BITS_PER_BYTE 8
	17	#define BITS_TO_LONGS(nr) \
	18	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
	19	#define DECLARE_BITMAP(name, bits) \
	20	unsigned long name[BITS_TO_LONGS(bits)]
	21
	22	#define small_const_nbits(nbits) \
	23	(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
	24
	25	static inline void bitmap_zero(unsigned long *dst, int nbits)
	26	{
	27	if (small_const_nbits(nbits))
	28	*dst = 0UL;
	29	else {
	30	int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
	31	memset(dst, 0, len);
	32	}
	33	}
	34
38517a78 ŁM	35	#define dma_cache_maint(addr, size, mode) cache_flush()
	36	void cache_flush(void);
	37
	38	#endif /* __LIN_COMPAT_H__ */