[mirror_ubuntu-bionic-kernel.git] / arch / metag / include / asm / cmpxchg_lnkget.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_METAG_CMPXCHG_LNKGET_H
#define __ASM_METAG_CMPXCHG_LNKGET_H

static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
{
	int temp, old;

	smp_mb();

	asm volatile (
		      "1:	LNKGETD %1, [%2]\n"
		      "	LNKSETD	[%2], %3\n"
		      "	DEFR	%0, TXSTAT\n"
		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
		      "	CMPT	%0, #HI(0x02000000)\n"
		      "	BNZ	1b\n"
#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
		      "	DCACHE	[%2], %0\n"
#endif
		      : "=&d" (temp), "=&d" (old)
		      : "da" (m), "da" (val)
		      : "cc"
		      );

	smp_mb();

	return old;
}

static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
{
	int temp, old;

	smp_mb();

	asm volatile (
		      "1:	LNKGETD %1, [%2]\n"
		      "	LNKSETD	[%2], %3\n"
		      "	DEFR	%0, TXSTAT\n"
		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
		      "	CMPT	%0, #HI(0x02000000)\n"
		      "	BNZ	1b\n"
#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
		      "	DCACHE	[%2], %0\n"
#endif
		      : "=&d" (temp), "=&d" (old)
		      : "da" (m), "da" (val & 0xff)
		      : "cc"
		      );

	smp_mb();

	return old;
}

static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
					  unsigned long new)
{
	__u32 retval, temp;

	smp_mb();

	asm volatile (
		      "1:	LNKGETD	%1, [%2]\n"
		      "	CMP	%1, %3\n"
		      "	LNKSETDEQ [%2], %4\n"
		      "	BNE	2f\n"
		      "	DEFR	%0, TXSTAT\n"
		      "	ANDT	%0, %0, #HI(0x3f000000)\n"
		      "	CMPT	%0, #HI(0x02000000)\n"
		      "	BNZ	1b\n"
#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
		      "	DCACHE	[%2], %0\n"
#endif
		      "2:\n"
		      : "=&d" (temp), "=&d" (retval)
		      : "da" (m), "bd" (old), "da" (new)
		      : "cc"
		      );

	smp_mb();

	return retval;
}

#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
6006c0d8 JH	2	#ifndef __ASM_METAG_CMPXCHG_LNKGET_H
	3	#define __ASM_METAG_CMPXCHG_LNKGET_H
	4
	5	static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
	6	{
	7	int temp, old;
	8
	9	smp_mb();
	10
	11	asm volatile (
	12	"1: LNKGETD %1, [%2]\n"
	13	" LNKSETD [%2], %3\n"
	14	" DEFR %0, TXSTAT\n"
	15	" ANDT %0, %0, #HI(0x3f000000)\n"
	16	" CMPT %0, #HI(0x02000000)\n"
	17	" BNZ 1b\n"
	18	#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
	19	" DCACHE [%2], %0\n"
	20	#endif
	21	: "=&d" (temp), "=&d" (old)
	22	: "da" (m), "da" (val)
	23	: "cc"
	24	);
	25
	26	smp_mb();
	27
	28	return old;
	29	}
	30
	31	static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
	32	{
	33	int temp, old;
	34
	35	smp_mb();
	36
	37	asm volatile (
	38	"1: LNKGETD %1, [%2]\n"
	39	" LNKSETD [%2], %3\n"
	40	" DEFR %0, TXSTAT\n"
	41	" ANDT %0, %0, #HI(0x3f000000)\n"
	42	" CMPT %0, #HI(0x02000000)\n"
	43	" BNZ 1b\n"
	44	#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
	45	" DCACHE [%2], %0\n"
	46	#endif
	47	: "=&d" (temp), "=&d" (old)
	48	: "da" (m), "da" (val & 0xff)
	49	: "cc"
	50	);
	51
	52	smp_mb();
	53
	54	return old;
	55	}
	56
	57	static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
	58	unsigned long new)
	59	{
	60	__u32 retval, temp;
	61
	62	smp_mb();
	63
	64	asm volatile (
	65	"1: LNKGETD %1, [%2]\n"
66	" CMP %1, %3\n"
67	" LNKSETDEQ [%2], %4\n"
68	" BNE 2f\n"
69	" DEFR %0, TXSTAT\n"
70	" ANDT %0, %0, #HI(0x3f000000)\n"
71	" CMPT %0, #HI(0x02000000)\n"
72	" BNZ 1b\n"
73	#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE
74	" DCACHE [%2], %0\n"
75	#endif
76	"2:\n"
6154c187	77	: "=&d" (temp), "=&d" (retval)
6006c0d8 JH	78	: "da" (m), "bd" (old), "da" (new)
	79	: "cc"
	80	);
	81
	82	smp_mb();
	83
	84	return retval;
	85	}
	86
	87	#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */