LXR linux/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
  22static 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) */
  32