Release 4.14 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;
}

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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;
}

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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;
}

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#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */
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Directory: arch/metag/include/asm

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