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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
88278ca2 | 2 | /* |
1da177e4 LT |
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 | ||
3115624e | 23 | static inline void msi_set_sync(void) |
1da177e4 LT |
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) */ |