arch/hexagon/include/asm/kgdb.h

   1 /*
   2  * arch/hexagon/include/asm/kgdb.h - Hexagon KGDB Support
   3  *
   4  * Copyright (c) 2011, The Linux Foundation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 and
   8  * only version 2 as published by the Free Software Foundation.
   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, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA.
  19  */
  20
  21 #ifndef __HEXAGON_KGDB_H__
  22 #define __HEXAGON_KGDB_H__
  23
  24 #define BREAK_INSTR_SIZE 4
  25 #define CACHE_FLUSH_IS_SAFE   1
  26 #define BUFMAX       ((NUMREGBYTES * 2) + 512)
  27
  28 static inline void arch_kgdb_breakpoint(void)
  29 {
  30         asm("trap0(#0xDB)");
  31 }
  32
  33 /* Registers:
  34  * 32 gpr + sa0/1 + lc0/1 + m0/1 + gp + ugp + pred + pc = 42 total.
  35  * vm regs = psp+elr+est+badva = 4
  36  * syscall+restart = 2 more
  37  * also add cs0/1 = 2
  38  * so 48 = 42 + 4 + 2 + 2
  39  */
  40 #define DBG_USER_REGS 42
  41 #define DBG_MAX_REG_NUM (DBG_USER_REGS + 8)
  42 #define NUMREGBYTES  (DBG_MAX_REG_NUM*4)
  43
  44 #endif /* __HEXAGON_KGDB_H__ */