arch/blackfin/include/asm/pda.h

   1 /*
   2  * File:         arch/blackfin/include/asm/pda.h
   3  * Author:       Philippe Gerum <rpm@xenomai.org>
   4  *
   5  *               Copyright 2007 Analog Devices Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see the file COPYING, or write
  19  * to the Free Software Foundation, Inc.,
  20  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21  */
  22
  23 #ifndef _ASM_BLACKFIN_PDA_H
  24 #define _ASM_BLACKFIN_PDA_H
  25
  26 #include <asm/mem_map.h>
  27
  28 #ifndef __ASSEMBLY__
  29
  30 struct blackfin_pda {                   /* Per-processor Data Area */
  31         struct blackfin_pda *next;
  32
  33         unsigned long syscfg;
  34 #ifdef CONFIG_SMP
  35         unsigned long imask;            /* Current IMASK value */
  36 #endif
  37
  38         unsigned long *ipdt;            /* Start of switchable I-CPLB table */
  39         unsigned long *ipdt_swapcount;  /* Number of swaps in ipdt */
  40         unsigned long *dpdt;            /* Start of switchable D-CPLB table */
  41         unsigned long *dpdt_swapcount;  /* Number of swaps in dpdt */
  42
  43         /*
  44          * Single instructions can have multiple faults, which
  45          * need to be handled by traps.c, in irq5. We store
  46          * the exception cause to ensure we don't miss a
  47          * double fault condition
  48          */
  49         unsigned long ex_iptr;
  50         unsigned long ex_optr;
  51         unsigned long ex_buf[4];
  52         unsigned long ex_imask;         /* Saved imask from exception */
  53         unsigned long *ex_stack;        /* Exception stack space */
  54
  55 #ifdef ANOMALY_05000261
  56         unsigned long last_cplb_fault_retx;
  57 #endif
  58         unsigned long dcplb_fault_addr;
  59         unsigned long icplb_fault_addr;
  60         unsigned long retx;
  61         unsigned long seqstat;
  62 };
  63
  64 extern struct blackfin_pda cpu_pda[];
  65
  66 void reserve_pda(void);
  67
  68 #endif  /* __ASSEMBLY__ */
  69
  70 #endif /* _ASM_BLACKFIN_PDA_H */