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 msi_set_sync(void)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) */ 33