[mirror_ubuntu-focal-kernel.git] / include / asm-m32r / bitops.h

#ifndef _ASM_M32R_BITOPS_H
#define _ASM_M32R_BITOPS_H

/*
 *  linux/include/asm-m32r/bitops.h
 *
 *  Copyright 1992, Linus Torvalds.
 *
 *  M32R version:
 *    Copyright (C) 2001, 2002  Hitoshi Yamamoto
 *    Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
 */

#include <linux/compiler.h>
#include <asm/assembler.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include <asm/types.h>

/*
 * These have to be done with inline assembly: that way the bit-setting
 * is guaranteed to be atomic. All bit operations return 0 if the bit
 * was cleared before the operation and != 0 if it was not.
 *
 * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
 */

/**
 * set_bit - Atomically set a bit in memory
 * @nr: the bit to set
 * @addr: the address to start counting from
 *
 * This function is atomic and may not be reordered.  See __set_bit()
 * if you do not require the atomic guarantees.
 * Note that @nr may be almost arbitrarily large; this function is not
 * restricted to acting on a single-word quantity.
 */
static __inline__ void set_bit(int nr, volatile void * addr)
{
	__u32 mask;
	volatile __u32 *a = addr;
	unsigned long flags;
	unsigned long tmp;

	a += (nr >> 5);
	mask = (1 << (nr & 0x1F));

	local_irq_save(flags);
	__asm__ __volatile__ (
		DCACHE_CLEAR("%0", "r6", "%1")
		M32R_LOCK" %0, @%1;		\n\t"
		"or	%0, %2;			\n\t"
		M32R_UNLOCK" %0, @%1;		\n\t"
		: "=&r" (tmp)
		: "r" (a), "r" (mask)
		: "memory"
#ifdef CONFIG_CHIP_M32700_TS1
		, "r6"
#endif	/* CONFIG_CHIP_M32700_TS1 */
	);
	local_irq_restore(flags);
}

/**
 * clear_bit - Clears a bit in memory
 * @nr: Bit to clear
 * @addr: Address to start counting from
 *
 * clear_bit() is atomic and may not be reordered.  However, it does
 * not contain a memory barrier, so if it is used for locking purposes,
 * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
 * in order to ensure changes are visible on other processors.
 */
static __inline__ void clear_bit(int nr, volatile void * addr)
{
	__u32 mask;
	volatile __u32 *a = addr;
	unsigned long flags;
	unsigned long tmp;

	a += (nr >> 5);
	mask = (1 << (nr & 0x1F));

	local_irq_save(flags);

	__asm__ __volatile__ (
		DCACHE_CLEAR("%0", "r6", "%1")
		M32R_LOCK" %0, @%1;		\n\t"
		"and	%0, %2;			\n\t"
		M32R_UNLOCK" %0, @%1;		\n\t"
		: "=&r" (tmp)
		: "r" (a), "r" (~mask)
		: "memory"
#ifdef CONFIG_CHIP_M32700_TS1
		, "r6"
#endif	/* CONFIG_CHIP_M32700_TS1 */
	);
	local_irq_restore(flags);
}

#define smp_mb__before_clear_bit()	barrier()
#define smp_mb__after_clear_bit()	barrier()

/**
 * change_bit - Toggle a bit in memory
 * @nr: Bit to clear
 * @addr: Address to start counting from
 *
 * change_bit() is atomic and may not be reordered.
 * Note that @nr may be almost arbitrarily large; this function is not
 * restricted to acting on a single-word quantity.
 */
static __inline__ void change_bit(int nr, volatile void * addr)
{
	__u32  mask;
	volatile __u32  *a = addr;
	unsigned long flags;
	unsigned long tmp;

	a += (nr >> 5);
	mask = (1 << (nr & 0x1F));

	local_irq_save(flags);
	__asm__ __volatile__ (
		DCACHE_CLEAR("%0", "r6", "%1")
		M32R_LOCK" %0, @%1;		\n\t"
		"xor	%0, %2;			\n\t"
		M32R_UNLOCK" %0, @%1;		\n\t"
		: "=&r" (tmp)
		: "r" (a), "r" (mask)
		: "memory"
#ifdef CONFIG_CHIP_M32700_TS1
		, "r6"
#endif	/* CONFIG_CHIP_M32700_TS1 */
	);
	local_irq_restore(flags);
}

/**
 * test_and_set_bit - Set a bit and return its old value
 * @nr: Bit to set
 * @addr: Address to count from
 *
 * This operation is atomic and cannot be reordered.
 * It also implies a memory barrier.
 */
static __inline__ int test_and_set_bit(int nr, volatile void * addr)
{
	__u32 mask, oldbit;
	volatile __u32 *a = addr;
	unsigned long flags;
	unsigned long tmp;

	a += (nr >> 5);
	mask = (1 << (nr & 0x1F));

	local_irq_save(flags);
	__asm__ __volatile__ (
		DCACHE_CLEAR("%0", "%1", "%2")
		M32R_LOCK" %0, @%2;		\n\t"
		"mv	%1, %0;			\n\t"
		"and	%0, %3;			\n\t"
		"or	%1, %3;			\n\t"
		M32R_UNLOCK" %1, @%2;		\n\t"
		: "=&r" (oldbit), "=&r" (tmp)
		: "r" (a), "r" (mask)
		: "memory"
	);
	local_irq_restore(flags);

	return (oldbit != 0);
}

/**
 * test_and_clear_bit - Clear a bit and return its old value
 * @nr: Bit to set
 * @addr: Address to count from
 *
 * This operation is atomic and cannot be reordered.
 * It also implies a memory barrier.
 */
static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
{
	__u32 mask, oldbit;
	volatile __u32 *a = addr;
	unsigned long flags;
	unsigned long tmp;

	a += (nr >> 5);
	mask = (1 << (nr & 0x1F));

	local_irq_save(flags);

	__asm__ __volatile__ (
		DCACHE_CLEAR("%0", "%1", "%3")
		M32R_LOCK" %0, @%3;		\n\t"
		"mv	%1, %0;			\n\t"
		"and	%0, %2;			\n\t"
		"not	%2, %2;			\n\t"
		"and	%1, %2;			\n\t"
		M32R_UNLOCK" %1, @%3;		\n\t"
		: "=&r" (oldbit), "=&r" (tmp), "+r" (mask)
		: "r" (a)
		: "memory"
	);
	local_irq_restore(flags);

	return (oldbit != 0);
}

/**
 * test_and_change_bit - Change a bit and return its old value
 * @nr: Bit to set
 * @addr: Address to count from
 *
 * This operation is atomic and cannot be reordered.
 * It also implies a memory barrier.
 */
static __inline__ int test_and_change_bit(int nr, volatile void * addr)
{
	__u32 mask, oldbit;
	volatile __u32 *a = addr;
	unsigned long flags;
	unsigned long tmp;

	a += (nr >> 5);
	mask = (1 << (nr & 0x1F));

	local_irq_save(flags);
	__asm__ __volatile__ (
		DCACHE_CLEAR("%0", "%1", "%2")
		M32R_LOCK" %0, @%2;		\n\t"
		"mv	%1, %0;			\n\t"
		"and	%0, %3;			\n\t"
		"xor	%1, %3;			\n\t"
		M32R_UNLOCK" %1, @%2;		\n\t"
		: "=&r" (oldbit), "=&r" (tmp)
		: "r" (a), "r" (mask)
		: "memory"
	);
	local_irq_restore(flags);

	return (oldbit != 0);
}

#include <asm-generic/bitops/non-atomic.h>
#include <asm-generic/bitops/ffz.h>
#include <asm-generic/bitops/__ffs.h>
#include <asm-generic/bitops/fls.h>
#include <asm-generic/bitops/fls64.h>

#ifdef __KERNEL__

#include <asm-generic/bitops/sched.h>
#include <asm-generic/bitops/find.h>
#include <asm-generic/bitops/ffs.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>

#endif /* __KERNEL__ */

#ifdef __KERNEL__

#include <asm-generic/bitops/ext2-non-atomic.h>
#include <asm-generic/bitops/ext2-atomic.h>
#include <asm-generic/bitops/minix.h>

#endif /* __KERNEL__ */

#endif /* _ASM_M32R_BITOPS_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_M32R_BITOPS_H
	2	#define _ASM_M32R_BITOPS_H
	3
	4	/*
	5	* linux/include/asm-m32r/bitops.h
	6	*
	7	* Copyright 1992, Linus Torvalds.
	8	*
	9	* M32R version:
	10	* Copyright (C) 2001, 2002 Hitoshi Yamamoto
	11	* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
	12	*/
	13
1da177e4 LT	14	#include <linux/compiler.h>
	15	#include <asm/assembler.h>
	16	#include <asm/system.h>
	17	#include <asm/byteorder.h>
	18	#include <asm/types.h>
	19
	20	/*
	21	* These have to be done with inline assembly: that way the bit-setting
	22	* is guaranteed to be atomic. All bit operations return 0 if the bit
	23	* was cleared before the operation and != 0 if it was not.
	24	*
	25	* bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
	26	*/
	27
	28	/**
	29	* set_bit - Atomically set a bit in memory
	30	* @nr: the bit to set
	31	* @addr: the address to start counting from
	32	*
	33	* This function is atomic and may not be reordered. See __set_bit()
	34	* if you do not require the atomic guarantees.
	35	* Note that @nr may be almost arbitrarily large; this function is not
	36	* restricted to acting on a single-word quantity.
	37	*/
	38	static __inline__ void set_bit(int nr, volatile void * addr)
	39	{
	40	__u32 mask;
	41	volatile __u32 *a = addr;
	42	unsigned long flags;
	43	unsigned long tmp;
	44
	45	a += (nr >> 5);
	46	mask = (1 << (nr & 0x1F));
	47
	48	local_irq_save(flags);
	49	__asm__ __volatile__ (
	50	DCACHE_CLEAR("%0", "r6", "%1")
	51	M32R_LOCK" %0, @%1; \n\t"
	52	"or %0, %2; \n\t"
	53	M32R_UNLOCK" %0, @%1; \n\t"
	54	: "=&r" (tmp)
	55	: "r" (a), "r" (mask)
	56	: "memory"
	57	#ifdef CONFIG_CHIP_M32700_TS1
	58	, "r6"
	59	#endif /* CONFIG_CHIP_M32700_TS1 */
	60	);
	61	local_irq_restore(flags);
	62	}
	63
1da177e4 LT	64	/**
	65	* clear_bit - Clears a bit in memory
	66	* @nr: Bit to clear
	67	* @addr: Address to start counting from
	68	*
	69	* clear_bit() is atomic and may not be reordered. However, it does
	70	* not contain a memory barrier, so if it is used for locking purposes,
	71	* you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
	72	* in order to ensure changes are visible on other processors.
	73	*/
	74	static __inline__ void clear_bit(int nr, volatile void * addr)
	75	{
	76	__u32 mask;
	77	volatile __u32 *a = addr;
	78	unsigned long flags;
	79	unsigned long tmp;
	80
	81	a += (nr >> 5);
	82	mask = (1 << (nr & 0x1F));
	83
	84	local_irq_save(flags);
	85
	86	__asm__ __volatile__ (
	87	DCACHE_CLEAR("%0", "r6", "%1")
	88	M32R_LOCK" %0, @%1; \n\t"
	89	"and %0, %2; \n\t"
	90	M32R_UNLOCK" %0, @%1; \n\t"
	91	: "=&r" (tmp)
	92	: "r" (a), "r" (~mask)
	93	: "memory"
	94	#ifdef CONFIG_CHIP_M32700_TS1
	95	, "r6"
	96	#endif /* CONFIG_CHIP_M32700_TS1 */
	97	);
	98	local_irq_restore(flags);
	99	}
	100
1da177e4 LT	101	#define smp_mb__before_clear_bit() barrier()
	102	#define smp_mb__after_clear_bit() barrier()
	103
1da177e4 LT	104	/**
	105	* change_bit - Toggle a bit in memory
	106	* @nr: Bit to clear
	107	* @addr: Address to start counting from
	108	*
	109	* change_bit() is atomic and may not be reordered.
	110	* Note that @nr may be almost arbitrarily large; this function is not
	111	* restricted to acting on a single-word quantity.
	112	*/
	113	static __inline__ void change_bit(int nr, volatile void * addr)
	114	{
	115	__u32 mask;
	116	volatile __u32 *a = addr;
	117	unsigned long flags;
	118	unsigned long tmp;
	119
	120	a += (nr >> 5);
	121	mask = (1 << (nr & 0x1F));
	122
	123	local_irq_save(flags);
	124	__asm__ __volatile__ (
	125	DCACHE_CLEAR("%0", "r6", "%1")
	126	M32R_LOCK" %0, @%1; \n\t"
	127	"xor %0, %2; \n\t"
	128	M32R_UNLOCK" %0, @%1; \n\t"
	129	: "=&r" (tmp)
	130	: "r" (a), "r" (mask)
	131	: "memory"
	132	#ifdef CONFIG_CHIP_M32700_TS1
	133	, "r6"
	134	#endif /* CONFIG_CHIP_M32700_TS1 */
	135	);
	136	local_irq_restore(flags);
	137	}
	138
	139	/**
	140	* test_and_set_bit - Set a bit and return its old value
	141	* @nr: Bit to set
	142	* @addr: Address to count from
	143	*
	144	* This operation is atomic and cannot be reordered.
	145	* It also implies a memory barrier.
	146	*/
	147	static __inline__ int test_and_set_bit(int nr, volatile void * addr)
	148	{
	149	__u32 mask, oldbit;
	150	volatile __u32 *a = addr;
	151	unsigned long flags;
	152	unsigned long tmp;
	153
	154	a += (nr >> 5);
	155	mask = (1 << (nr & 0x1F));
	156
	157	local_irq_save(flags);
	158	__asm__ __volatile__ (
	159	DCACHE_CLEAR("%0", "%1", "%2")
	160	M32R_LOCK" %0, @%2; \n\t"
	161	"mv %1, %0; \n\t"
	162	"and %0, %3; \n\t"
	163	"or %1, %3; \n\t"
	164	M32R_UNLOCK" %1, @%2; \n\t"
	165	: "=&r" (oldbit), "=&r" (tmp)
	166	: "r" (a), "r" (mask)
	167	: "memory"
168	);
169	local_irq_restore(flags);
170
171	return (oldbit != 0);
172	}
173
1da177e4 LT	174	/**
	175	* test_and_clear_bit - Clear a bit and return its old value
	176	* @nr: Bit to set
	177	* @addr: Address to count from
	178	*
	179	* This operation is atomic and cannot be reordered.
	180	* It also implies a memory barrier.
	181	*/
	182	static __inline__ int test_and_clear_bit(int nr, volatile void * addr)
	183	{
	184	__u32 mask, oldbit;
	185	volatile __u32 *a = addr;
	186	unsigned long flags;
	187	unsigned long tmp;
	188
	189	a += (nr >> 5);
	190	mask = (1 << (nr & 0x1F));
	191
	192	local_irq_save(flags);
	193
	194	__asm__ __volatile__ (
	195	DCACHE_CLEAR("%0", "%1", "%3")
	196	M32R_LOCK" %0, @%3; \n\t"
	197	"mv %1, %0; \n\t"
	198	"and %0, %2; \n\t"
	199	"not %2, %2; \n\t"
	200	"and %1, %2; \n\t"
	201	M32R_UNLOCK" %1, @%3; \n\t"
	202	: "=&r" (oldbit), "=&r" (tmp), "+r" (mask)
	203	: "r" (a)
	204	: "memory"
	205	);
	206	local_irq_restore(flags);
	207
	208	return (oldbit != 0);
	209	}
	210
1da177e4 LT	211	/**
	212	* test_and_change_bit - Change a bit and return its old value
	213	* @nr: Bit to set
	214	* @addr: Address to count from
	215	*
	216	* This operation is atomic and cannot be reordered.
	217	* It also implies a memory barrier.
	218	*/
	219	static __inline__ int test_and_change_bit(int nr, volatile void * addr)
	220	{
	221	__u32 mask, oldbit;
	222	volatile __u32 *a = addr;
	223	unsigned long flags;
	224	unsigned long tmp;
	225
	226	a += (nr >> 5);
	227	mask = (1 << (nr & 0x1F));
	228
	229	local_irq_save(flags);
	230	__asm__ __volatile__ (
	231	DCACHE_CLEAR("%0", "%1", "%2")
	232	M32R_LOCK" %0, @%2; \n\t"
	233	"mv %1, %0; \n\t"
	234	"and %0, %3; \n\t"
	235	"xor %1, %3; \n\t"
	236	M32R_UNLOCK" %1, @%2; \n\t"
	237	: "=&r" (oldbit), "=&r" (tmp)
	238	: "r" (a), "r" (mask)
	239	: "memory"
	240	);
	241	local_irq_restore(flags);
	242
	243	return (oldbit != 0);
	244	}
	245
6d9f937b AM	246	#include <asm-generic/bitops/non-atomic.h>
	247	#include <asm-generic/bitops/ffz.h>
	248	#include <asm-generic/bitops/__ffs.h>
	249	#include <asm-generic/bitops/fls.h>
	250	#include <asm-generic/bitops/fls64.h>
1da177e4 LT	251
	252	#ifdef __KERNEL__
	253
6d9f937b AM	254	#include <asm-generic/bitops/sched.h>
	255	#include <asm-generic/bitops/find.h>
	256	#include <asm-generic/bitops/ffs.h>
	257	#include <asm-generic/bitops/hweight.h>
26333576	258	#include <asm-generic/bitops/lock.h>
1da177e4 LT	259
	260	#endif /* __KERNEL__ */
	261
	262	#ifdef __KERNEL__
	263
6d9f937b AM	264	#include <asm-generic/bitops/ext2-non-atomic.h>
	265	#include <asm-generic/bitops/ext2-atomic.h>
	266	#include <asm-generic/bitops/minix.h>
1da177e4 LT	267
	268	#endif /* __KERNEL__ */
	269
	270	#endif /* _ASM_M32R_BITOPS_H */