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