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/* SPDX-License-Identifier: GPL-2.0 */
/*
* msi.h: Defines specific to the MBus - Sbus - Interface.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
*/
#ifndef _SPARC_MSI_H
#define _SPARC_MSI_H
/*
* Locations of MSI Registers.
*/
#define MSI_MBUS_ARBEN 0xe0001008 /* MBus Arbiter Enable register */
/*
* Useful bits in the MSI Registers.
*/
#define MSI_ASYNC_MODE 0x80000000 /* Operate the MSI asynchronously */
static inline void msi_set_sync(void)
{
__asm__ __volatile__ ("lda [%0] %1, %%g3\n\t"
"andn %%g3, %2, %%g3\n\t"
"sta %%g3, [%0] %1\n\t" : :
"r" (MSI_MBUS_ARBEN),
"i" (ASI_M_CTL), "r" (MSI_ASYNC_MODE) : "g3");
}
#endif /* !(_SPARC_MSI_H) */
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