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 /* Blackbox */
  22 #define GET_PROCESSOR_ID(reg) \
  23         sethi   %hi(___b_smp_processor_id), %reg; \
  24         sethi   %hi(boot_cpu_id), %reg; \
  25         ldub    [%reg + %lo(boot_cpu_id)], %reg;
  26
  27 #define GET_PROCESSOR_MID(reg, tmp) \
  28         rd      %tbr, %reg; \
  29         sethi   %hi(C_LABEL(mid_xlate)), %tmp; \
  30         srl     %reg, 12, %reg; \
  31         or      %tmp, %lo(C_LABEL(mid_xlate)), %tmp; \
  32         and     %reg, 3, %reg; \
  33         ldub    [%tmp + %reg], %reg;
  34
  35 #define GET_PROCESSOR_OFFSET(reg, tmp) \
  36         GET_PROCESSOR_ID(reg) \
  37         sethi   %hi(C_LABEL(cpu_offset)), %tmp; \
  38         sll     %reg, 2, %reg; \
  39         or      %tmp, %lo(C_LABEL(cpu_offset)), %tmp; \
  40         ld      [%tmp + %reg], %reg;
  41
  42 #define GET_PAGE_OFFSET(reg) \
  43         sethi   BTFIXUP_SETHI_INIT(page_offset,0xf0000000), %reg;
  44
  45 /* All trap entry points _must_ begin with this macro or else you
  46  * lose.  It makes sure the kernel has a proper window so that
  47  * c-code can be called.
  48  */
  49 #define SAVE_ALL_HEAD \
  50         sethi   %hi(trap_setup), %l4; \
  51         jmpl    %l4 + %lo(trap_setup), %l6;
  52 #define SAVE_ALL \
  53         SAVE_ALL_HEAD \
  54          nop;
  55
  56 /* All traps low-level code here must end with this macro. */
  57 #define RESTORE_ALL b ret_trap_entry; clr %l6;
  58
  59 /* sun4 probably wants half word accesses to ASI_SEGMAP, while sun4c+
  60    likes byte accesses. These are to avoid ifdef mania. */
  61
  62 #ifdef CONFIG_SUN4
  63 #define lduXa   lduha
  64 #define stXa    stha
  65 #else
  66 #define lduXa   lduba
  67 #define stXa    stba
  68 #endif
  69
  70 #endif /* !(_SPARC_ASMMACRO_H) */