NeXT/spl.h

   1 /*
   2  *      File:   spl.h
   3  *      Author: Avadis Tevanian, Jr.
   4  *
   5  *      Define inline macros for spl routines.
   6  *
   7  * HISTORY
   8  *
   9  * 14-May-90  Gregg Kellogg (gk) at NeXT
  10  *      Changed SPLCLOCK from 6 to 3, as much scheduling code expects
  11  *      splclock() == splsched().  Added splusclock().
  12  *
  13  * 19-Jun-89  Mike DeMoney (mike) at NeXT
  14  *      Modified to allow spl assertions in spl_measured.h
  15  */
  16
  17 #ifndef _KERNSERV_M68K_SPL_H_
  18 #define _KERNSERV_M68K_SPL_H_
  19
  20 #ifdef  KERNEL_BUILD
  21 #import <iplmeas.h>
  22 #else   KERNEL_BUILD
  23 /* #import <mach/features.h> */
  24 #endif  KERNEL_BUILD
  25
  26 #import <bsd/m68k/psl.h>
  27
  28 #if     NIPLMEAS && !defined(NO_IPLMEAS)
  29 #import <machdep/m68k/spl_measured.h>
  30 #endif  NIPLMEAS && !defined(NO_IPLMEAS)
  31
  32 #ifndef SPLU_MACRO
  33
  34 #ifdef  ASSEMBLER
  35 #define SPLU_MACRO(ipl) \
  36         movw    sr,d0; \
  37         movw    \#((ipl)*256 + 0x2000),sr;
  38
  39 #define splx(nsr) \
  40         movw    sr,d0; \
  41         movw    nsr,sr;
  42
  43 #else   ASSEMBLER
  44
  45 #define SPLU_MACRO(x) \
  46 ({ register short ret; \
  47         asm volatile ("movw     sr,%0" : "=dm" (ret)); \
  48         asm volatile ("movw     %1,sr" : "=m" (*(char *)0): "Jdm" ((short)(x)*256+0x2000)); \
  49         ret; \
  50 })
  51
  52 #define splx(x) \
  53 ({ register short ret; \
  54         asm volatile ("movw     sr,%0" : "=dm" (ret)); \
  55         asm volatile ("movw     %1,sr" : "=m" (*(char *)0): "Jdm" ((short)x)); \
  56         ret; \
  57 })
  58
  59 #endif  ASSEMBLER
  60
  61 #define SPLD_MACRO(ipl) SPLU_MACRO(ipl)
  62 #define spln(x)         splx(x)
  63
  64 #endif  SPLU_MACRO
  65
  66 #define ipltospl(ipl)   (SR_SUPER | ((ipl) << 8))
  67
  68 /*
  69  *      Define spls as the usual numbers (which should never be used
  70  *      directly.
  71  */
  72
  73 #define spl0()  SPLD_MACRO(0)
  74 #define spl1()  SPLU_MACRO(1)
  75 #define spl2()  SPLU_MACRO(2)
  76 #define spl3()  SPLU_MACRO(3)
  77 #define spl4()  SPLU_MACRO(4)
  78 #define spl5()  SPLU_MACRO(5)
  79 #define spl6()  SPLU_MACRO(6)
  80 #define spl7()  SPLU_MACRO(7)
  81
  82 /*
  83  *      Define spl mnemonics.
  84  */
  85 #define IPLHIGH         7
  86 #define IPLDMA          6
  87 #define IPLUSCLOCK      6
  88 #define IPLSCC          5
  89 #define IPLCLOCK        3
  90 #define IPLBIO          3
  91 #define IPLSCHED        3
  92 #define IPLIMP          3
  93 #define IPLVM           3
  94 #define IPLNET          2
  95 #define IPLTTY          1
  96 #define IPLSOFTCLOCK    1
  97
  98 #define splhigh()       SPLU_MACRO(IPLHIGH)
  99 #define splusclock()    SPLU_MACRO(IPLUSCLOCK)
 100 #define spldma()        SPLU_MACRO(IPLDMA)
 101 #define splscc()        SPLU_MACRO(IPLSCC)
 102 #define splclock()      SPLU_MACRO(IPLCLOCK)
 103 #define splbio()        SPLU_MACRO(IPLBIO)
 104 #define splsched()      SPLU_MACRO(IPLSCHED)
 105 #define splimp()        SPLU_MACRO(IPLIMP)
 106 #define splvm()         SPLU_MACRO(IPLVM)
 107 #define splnet()        SPLU_MACRO(IPLNET)
 108 #define spltty()        SPLU_MACRO(IPLTTY)
 109 #define splsoftclock()  SPLU_MACRO(IPLSOFTCLOCK)
 110
 111 #endif  _KERNSERV_M68K_SPL_H_