kernel/arch/ppc/include/ctx.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #ifndef _ARM_CTX_H
  21 #define _ARM_CTX_H
  22
  23 #include <build.h>
  24
  25 #ifdef ARCH_arm
  26
  27 #define ARM_STACKALIGN(a, b) ((a) & ~((b)-1))
  28
  29 /* arm exception iframe */
  30 struct arm_ex_iframe {
  31         unsigned *spsr;
  32         unsigned *r0;
  33         unsigned *r1;
  34         unsigned *r2;
  35         unsigned *r3;
  36         unsigned *r12;
  37         unsigned *lr;
  38         unsigned *pc;
  39 };
  40
  41 struct arm_fault_frame {
  42         unsigned *spsr;
  43         unsigned *usp;
  44         unsigned *ulr;
  45         unsigned r[13];
  46         unsigned *pc;
  47 };
  48
  49 /* arm context structure for task switch */
  50 struct arm_ctx_frame {
  51         unsigned *r4;
  52         unsigned *r5;
  53         unsigned *r6;
  54         unsigned *r7;
  55         unsigned *r8;
  56         unsigned *r9;
  57         unsigned *r10;
  58         unsigned *r11;
  59         unsigned *lr;
  60         unsigned *usp;
  61         unsigned *ulr;
  62 };
  63
  64 extern void arm_task_switch (unsigned **old_sp, unsigned *new_sp);
  65
  66 typedef unsigned (task_handler_t) ();
  67
  68 #endif
  69
  70 #endif
  71