1 /*
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 
msi_set_sync(void)22 static 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) */
32