/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * kgdb support for ARC
 *
 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
 */

#ifndef __ARC_KGDB_H__
#define __ARC_KGDB_H__

#ifdef CONFIG_KGDB

#include <asm/ptrace.h>

/* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
 * register API yet */
#undef DBG_MAX_REG_NUM

#define GDB_MAX_REGS            87

#define BREAK_INSTR_SIZE        2
#define CACHE_FLUSH_IS_SAFE     1
#define NUMREGBYTES             (GDB_MAX_REGS * 4)
#define BUFMAX                  2048

static inline void arch_kgdb_breakpoint(void)
{
        __asm__ __volatile__ ("trap_s   0x4\n");
}

extern void kgdb_trap(struct pt_regs *regs);

/* This is the numbering of registers according to the GDB. See GDB's
 * arc-tdep.h for details.
 *
 * Registers are ordered for GDB 7.5. It is incompatible with GDB 6.8. */
enum arc_linux_regnums {
        _R0             = 0,
        _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
        _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
        _R25, _R26,
        _FP             = 27,
        __SP            = 28,
        _R30            = 30,
        _BLINK          = 31,
        _LP_COUNT       = 60,
        _STOP_PC        = 64,
        _RET            = 64,
        _LP_START       = 65,
        _LP_END         = 66,
        _STATUS32       = 67,
        _ECR            = 76,
        _BTA            = 82,
};

#else
#define kgdb_trap(regs)
#endif

#endif  /* __ARC_KGDB_H__ */