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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: msi.h,v 1.3 1996/08/29 09:48:25 davem Exp $
2 * msi.h: Defines specific to the MBus - Sbus - Interface.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
6 */
7
8#ifndef _SPARC_MSI_H
9#define _SPARC_MSI_H
10
11/*
12 * Locations of MSI Registers.
13 */
14#define MSI_MBUS_ARBEN 0xe0001008 /* MBus Arbiter Enable register */
15
16/*
17 * Useful bits in the MSI Registers.
18 */
19#define MSI_ASYNC_MODE 0x80000000 /* Operate the MSI asynchronously */
20
21
22extern __inline__ void msi_set_sync(void)
23{
24 __asm__ __volatile__ ("lda [%0] %1, %%g3\n\t"
25 "andn %%g3, %2, %%g3\n\t"
26 "sta %%g3, [%0] %1\n\t" : :
27 "r" (MSI_MBUS_ARBEN),
28 "i" (ASI_M_CTL), "r" (MSI_ASYNC_MODE) : "g3");
29}
30
31#endif /* !(_SPARC_MSI_H) */