| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $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 | |
| 22 | extern __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) */ |