arch/sparc/include/asm/msi.h

   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
  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) */