LXR linux/include/asm-sparc/asmmacro.h

   1/* asmmacro.h: Assembler macros.
   2 *
   3 * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
   4 */
   5
   6#ifndef _SPARC_ASMMACRO_H
   7#define _SPARC_ASMMACRO_H
   8
   9#include <asm/btfixup.h>
  10#include <asm/asi.h>
  11
  12#define GET_PROCESSOR4M_ID(reg) \
  13        rd      %tbr, %reg; \
  14        srl     %reg, 12, %reg; \
  15        and     %reg, 3, %reg;
  16
  17#define GET_PROCESSOR4D_ID(reg) \
  18        lda     [%g0] ASI_M_VIKING_TMP1, %reg;
  19
  20/* All trap entry points _must_ begin with this macro or else you
  21 * lose.  It makes sure the kernel has a proper window so that
  22 * c-code can be called.
  23 */
  24#define SAVE_ALL_HEAD \
  25        sethi   %hi(trap_setup), %l4; \
  26        jmpl    %l4 + %lo(trap_setup), %l6;
  27#define SAVE_ALL \
  28        SAVE_ALL_HEAD \
  29         nop;
  30
  31/* All traps low-level code here must end with this macro. */
  32#define RESTORE_ALL b ret_trap_entry; clr %l6;
  33
  34/* sun4 probably wants half word accesses to ASI_SEGMAP, while sun4c+
  35   likes byte accesses. These are to avoid ifdef mania. */
  36
  37#ifdef CONFIG_SUN4
  38#define lduXa   lduha
  39#define stXa    stha
  40#else
  41#define lduXa   lduba
  42#define stXa    stba
  43#endif
  44
  45#endif /* !(_SPARC_ASMMACRO_H) */
  46