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/* $OpenBSD: db_machdep.h,v 1.4 2005/04/19 15:23:37 miod Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* Copyright (c) 1991 OMRON Corporation
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef _M88K_DB_MACHDEP_H_
#define _M88K_DB_MACHDEP_H_
/* trap numbers used by ddb */
#define DDB_ENTRY_BKPT_NO 130
#define DDB_ENTRY_TRACE_NO 131
#define DDB_ENTRY_TRAP_NO 132
#ifndef _LOCORE
#include <machine/pcb.h>
#include <machine/trap.h>
#include <uvm/uvm_param.h>
#define PC_REGS(regs) \
(CPU_IS88110 ? ((regs)->exip & XIP_ADDR) : \
((regs)->sxip & XIP_V ? (regs)->sxip & XIP_ADDR : \
((regs)->snip & NIP_V ? (regs)->snip & NIP_ADDR : \
(regs)->sfip & FIP_ADDR)))
#define SET_PC_REGS(regs, value) \
do { \
if (CPU_IS88110) \
(regs)->exip = ((regs)->exip & ~XIP_ADDR) | old_pc; \
else if ((regs)->sxip & XIP_V) \
(regs)->sxip = ((regs)->sxip & ~XIP_ADDR) | old_pc; \
else if ((regs)->snip & NIP_V) \
(regs)->snip = ((regs)->snip & ~NIP_ADDR) | old_pc; \
else \
(regs)->sfip = ((regs)->sfip & ~FIP_ADDR) | old_pc; \
} while (0)
/* inst_return(ins) - is the instruction a function call return.
* Not mutually exclusive with inst_branch. Should be a jmp r1. */
#define inst_return(I) \
(((I) & 0xfffffbff) == 0xf400c001 ? TRUE : FALSE)
/*
* inst_call - function call predicate: is the instruction a function call.
* Could be either bsr or jsr
*/
#define inst_call(I) \
(((I) & 0xf8000000) == 0xc8000000 /*bsr*/ || \
((I) & 0xfffffbe0) == 0xf400c800 /*jsr*/ ? TRUE : FALSE)
#ifdef DDB
/*
* This is a hack so that mc88100 can use software single step
* and mc88110 can use the wonderful hardware single step
* feature. XXX smurph
*/
#define INTERNAL_SSTEP /* Use local Single Step routines */
#define BKPT_SIZE (4) /* number of bytes in bkpt inst. */
#define BKPT_INST (0xF000D000 | DDB_ENTRY_BKPT_NO) /* tb0, 0,r0, vector 130 */
#define BKPT_SET(inst) (BKPT_INST)
/* Entry trap for the debugger - used for inline assembly breaks*/
#define ENTRY_ASM "tb0 0, r0, 132"
typedef vaddr_t db_addr_t;
typedef long db_expr_t;
typedef struct reg db_regs_t;
extern db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
unsigned inst_load(unsigned);
unsigned inst_store(unsigned);
boolean_t inst_branch(unsigned);
db_addr_t next_instr_address(db_addr_t, unsigned);
db_addr_t branch_taken(u_int, db_addr_t, db_expr_t (*)(db_regs_t *, int),
db_regs_t *);
int ddb_break_trap(int, db_regs_t *);
int ddb_entry_trap(int, db_regs_t *);
/* breakpoint/watchpoint foo */
#define IS_BREAKPOINT_TRAP(type,code) ((type)==T_KDB_BREAK)
#if 0
#define IS_WATCHPOINT_TRAP(type,code) ((type)==T_KDB_WATCH)
#else
#define IS_WATCHPOINT_TRAP(type,code) 0
#endif /* T_WATCHPOINT */
#ifdef INTERNAL_SSTEP
db_expr_t getreg_val(db_regs_t *, int);
void db_set_single_step(db_regs_t *);
void db_clear_single_step(db_regs_t *);
#else
/* need software single step */
#define SOFTWARE_SSTEP 1 /* we need this for mc88100 */
#endif
#define DB_ACCESS_LEVEL DB_ACCESS_ANY
/* instruction type checking - others are implemented in db_sstep.c */
#define inst_trap_return(ins) ((ins) == 0xf400fc00U)
/* machine specific commands have been added to ddb */
#define DB_MACHINE_COMMANDS
int m88k_print_instruction(unsigned iadr, long inst);
#define DB_AOUT_SYMBOLS
#endif /* DDB */
#endif /* _LOCORE */
#endif /* _M88K_DB_MACHDEP_H_ */
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