2.11BSD#431 - /usr/src/sys/pdp/koverlay.h

   1: /*
   2:  * Copyright (c) 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)koverlay.h	1.1 (2.10BSD Berkeley) 12/1/86
   7:  */
   8: 
   9: /*
  10:  *	Definitions relating to kernel text overlays.  The kernel and
  11:  *	stand/bootstrap/boot.c must be recompiled if these are changed.
  12:  *	In practice, it is very difficult to change these numbers since
  13:  *	many changes will be necessary in mch.s.  This file is provided
  14:  *	mainly to specify how kernel overlays are laid out, not for tuning.
  15:  *
  16:  *
  17:  *	Primary variables:
  18:  *		# ovly regs	the maximum size of a kernel
  19:  *				overlay segment will be
  20:  *				8k bytes * # ovly regs.
  21:  *				Currently, must be 1.
  22:  *
  23:  *		OVLY_TABLE_BASE	the address in l.s where the
  24:  *				kernel stores the prototype
  25:  *				PARs and PDRs.  The only one
  26:  *				of the constants in this file
  27:  *				which may readily be changed.
  28:  *
  29:  *		NUM_TEXT_REGS	the maximum size of the kernel
  30:  *				base text segment will be
  31:  *				8k bytes * NUM_TEXT_REGS.
  32:  */
  33: 
  34: #define OVLY_TABLE_BASE     01000
  35: 
  36: #define I_NUM_TEXT_REGS     7   /* 8 - # ovly regs */
  37: #define N_NUM_TEXT_REGS     2
  38: 
  39: #ifdef KERN_NONSEP
  40: #define NUM_TEXT_REGS       N_NUM_TEXT_REGS
  41: #else !KERN_NONSEP
  42: #define NUM_TEXT_REGS       I_NUM_TEXT_REGS
  43: #endif KERN_NONSEP
  44: 
  45: #define I_MAX_DATA_REGS     6
  46: #define N_MAX_DATA_REGS     3   /* 6 - NUM_TEXT_REGS - # ovly regs */
  47: 
  48: #ifdef KERN_NONSEP
  49: #define MAX_DATA_REGS       N_MAX_DATA_REGS
  50: #else !KERN_NONSEP
  51: #define MAX_DATA_REGS       I_MAX_DATA_REGS
  52: #endif KERN_NONSEP
  53: 
  54: #define I_DATA_PAR_BASE     KDSA0
  55: #define N_DATA_PAR_BASE     KISA3   /* &KISA[NUM_TEXT_REGS + # ovly regs] */
  56: 
  57: #ifdef KERN_NONSEP
  58: #define DATA_PAR_BASE       N_DATA_PAR_BASE
  59: #else !KERN_NONSEP
  60: #define DATA_PAR_BASE       I_DATA_PAR_BASE
  61: #endif KERN_NONSEP
  62: 
  63: #define I_DATA_PDR_BASE     KDSD0
  64: #define N_DATA_PDR_BASE     KISD3   /* &KISD[NUM_TEXT_REGS + # ovly regs] */
  65: 
  66: #ifdef KERN_NONSEP
  67: #define DATA_PDR_BASE       N_DATA_PDR_BASE
  68: #else !KERN_NONSEP
  69: #define DATA_PDR_BASE       I_DATA_PDR_BASE
  70: #endif KERN_NONSEP
  71: 
  72: #define TEXT_PAR_BASE       KISA0
  73: #define TEXT_PDR_BASE       KISD0
  74: 
  75: #ifdef KERN_NONSEP
  76: #define OVLY_PAR        KISA2   /* &KISA[NUM_TEXT_REGS] */
  77: #define OVLY_PDR        KISD2   /* &KISD[NUM_TEXT_REGS] */
  78: #else !KERN_NONSEP
  79: #define OVLY_PAR        KISA7   /* &KISA[NUM_TEXT_REGS] */
  80: #define OVLY_PDR        KISD7   /* &KISD[NUM_TEXT_REGS] */
  81: #endif KERN_NONSEP

Defined macros

Usage of this include