arch/hexagon/include/asm/kgdb.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/hexagon/include/asm/kgdb.h - Hexagon KGDB Support
   4  *
   5  * Copyright (c) 2011, The Linux Foundation. All rights reserved.
   6  */
   7
   8 #ifndef __HEXAGON_KGDB_H__
   9 #define __HEXAGON_KGDB_H__
  10
  11 #define BREAK_INSTR_SIZE 4
  12 #define CACHE_FLUSH_IS_SAFE   1
  13 #define BUFMAX       ((NUMREGBYTES * 2) + 512)
  14
  15 static inline void arch_kgdb_breakpoint(void)
  16 {
  17         asm("trap0(#0xDB)");
  18 }
  19
  20 /* Registers:
  21  * 32 gpr + sa0/1 + lc0/1 + m0/1 + gp + ugp + pred + pc = 42 total.
  22  * vm regs = psp+elr+est+badva = 4
  23  * syscall+restart = 2 more
  24  * also add cs0/1 = 2
  25  * so 48 = 42 + 4 + 2 + 2
  26  */
  27 #define DBG_USER_REGS 42
  28 #define DBG_MAX_REG_NUM (DBG_USER_REGS + 8)
  29 #define NUMREGBYTES  (DBG_MAX_REG_NUM*4)
  30
  31 #endif /* __HEXAGON_KGDB_H__ */