1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * msi.h:  Defines specific to the MBus - Sbus - Interface.
 4 *
 5 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
 6 * Copyright (C) 1996 Eddie C. Dost   (ecd@skynet.be)
 7 */
 8
 9#ifndef _SPARC_MSI_H
10#define _SPARC_MSI_H
11
12/*
13 * Locations of MSI Registers.
14 */
15#define MSI_MBUS_ARBEN	0xe0001008	/* MBus Arbiter Enable register */
16
17/*
18 * Useful bits in the MSI Registers.
19 */
20#define MSI_ASYNC_MODE  0x80000000	/* Operate the MSI asynchronously */
21
22
23static inline void msi_set_sync(void)
24{
25	__asm__ __volatile__ ("lda [%0] %1, %%g3\n\t"
26			      "andn %%g3, %2, %%g3\n\t"
27			      "sta %%g3, [%0] %1\n\t" : :
28			      "r" (MSI_MBUS_ARBEN),
29			      "i" (ASI_M_CTL), "r" (MSI_ASYNC_MODE) : "g3");
30}
31
32#endif /* !(_SPARC_MSI_H) */