/*      $NetBSD: db_machdep.h,v 1.15 2023/09/03 20:52:13 andvar Exp $   */

/*      $OpenBSD: db_machdep.h,v 1.5 2001/02/16 19:20:13 mickey Exp $   */

/*
* Copyright (c) 1998-2004 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _HPPA_DB_MACHDEP_H_
#define _HPPA_DB_MACHDEP_H_

#include <sys/param.h>

#include <uvm/uvm_extern.h>

#include <machine/pcb.h>
#include <machine/frame.h>

#define DB_ELF_SYMBOLS

/* types the generic ddb module needs */
typedef vaddr_t db_addr_t;
#define DDB_EXPR_FMT    "l"             /* expression is long */
typedef long db_expr_t;

typedef struct trapframe db_regs_t;
extern db_regs_t        ddb_regs;
#define DDB_REGS        (&ddb_regs)

/* DDB commands not in db_interface.c */
void    db_dump_trap(db_expr_t, bool, db_expr_t, const char *);

/*
* Things needed by kgdb:
*/
typedef long kgdb_reg_t;
/* From gdb's config/pa/tm-pa.h NUM_REGS value */
#define KGDB_NUMREGS    (128)
/* XXX fredette - I think this is just a "big enough" kind of value */
#define KGDB_BUFLEN     2048

#define PC_REGS(regs)   ((regs)->tf_iioq_head)

/* Breakpoint related definitions */
#define BKPT_ADDR(addr) (addr)          /* breakpoint address */
#define BKPT_INST       0x00010000      /* break 0,8 */
#define BKPT_SIZE       sizeof(int)
#define BKPT_SET(inst, addr)    BKPT_INST

#define IS_BREAKPOINT_TRAP(type, code) (type != T_RECOVERY)
#define IS_WATCHPOINT_TRAP(type, code) 0

/*
* The PA-RISC leaves tf_iioq_head pointing to the break
* instruction, so we don't have to define FIXUP_PC_AFTER_BREAK.
* However, we can't allow ddb/kgdb to simply add BKPT_SIZE to
* tf_iioq_head to advance past the breakpoint, since this doesn't
* address tf_iioq_tail.  So, we define PC_ADVANCE.
*/
#define PC_ADVANCE(regs) do {                           \
       (regs)->tf_iioq_head = (regs)->tf_iioq_tail;    \
       (regs)->tf_iioq_tail += BKPT_SIZE;              \
} while(/* CONSTCOND */ 0)

#define DB_VALID_BREAKPOINT(addr) db_valid_breakpoint(addr)

static __inline int inst_call(u_int ins) {
       return (ins & 0xfc00e000) == 0xe8000000 ||
              (ins & 0xfc00e000) == 0xe8004000 ||
              (ins & 0xfc000000) == 0xe4000000;
}
static __inline int inst_branch(u_int ins) {
       return (ins & 0xf0000000) == 0xe0000000 ||
              (ins & 0xf0000000) == 0xc0000000 ||
              (ins & 0xf0000000) == 0xa0000000 ||
              (ins & 0xf0000000) == 0x80000000;
}
static __inline int inst_load(u_int ins) {
       return (ins & 0xf0000000) == 0x40000000 ||
              (ins & 0xf4000200) == 0x24000000 ||
              (ins & 0xfc000200) == 0x0c000000 ||
              (ins & 0xfc001fc0) != 0x0c0011c0;
}
static __inline int inst_store(u_int ins) {
       return (ins & 0xf0000000) == 0x60000000 ||      /* st */
              (ins & 0xf4000200) == 0x24000200 ||      /* fst/cst */
              (ins & 0xfc000200) == 0x0c000200 ||      /* stby */
              (ins & 0xfc0003c0) == 0xc0001c0;         /* ldcw */
}
static __inline int inst_return(u_int ins) {
       return (ins & 0xfc00e000) == 0xe800c000 ||
              (ins & 0xfc000000) == 0xe0000000;
}
static __inline int inst_trap_return(u_int ins) {
       return (ins & 0xfc001fe0) == 0x00000c00 ||
              (ins & 0xfc001fe0) == 0x00000ca0;
}

#define db_clear_single_step(r) ((r)->tf_ipsw &= ~PSW_R)
#define db_set_single_step(r)   ((r)->tf_ipsw |= PSW_R)

#define DB_MACHINE_COMMANDS

int db_valid_breakpoint(db_addr_t);
int kdb_trap(int, int, db_regs_t *);

#endif /* _HPPA_DB_MACHDEP_H_ */