1/*-
2 * Mach Operating System
3 * Copyright (c) 1992 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19 *  School of Computer Science
20 *  Carnegie Mellon University
21 *  Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 *
26 *	$OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $
27 *	$NetBSD: db_machdep.h,v 1.4.22.1 2000/08/05 11:10:43 wiz Exp $
28 * $FreeBSD$
29 */
30
31/*
32 * Machine-dependent defines for new kernel debugger.
33 */
34#ifndef _POWERPC_DB_MACHDEP_H_
35#define	_POWERPC_DB_MACHDEP_H_
36
37#include <vm/vm_param.h>
38#include <machine/elf.h>
39
40#define	DB_ELF_SYMBOLS
41#define	DB_ELFSIZE	__ELF_WORD_SIZE
42
43#define BYTE_MSF        (1)
44
45typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
46typedef	intptr_t	db_expr_t;	/* expression - signed */
47
48#define	PC_REGS(regs)	((db_addr_t)kdb_thrctx->pcb_lr)
49
50#define	BKPT_INST	0x7C810808	/* breakpoint instruction */
51
52#define	BKPT_SIZE	(4)		/* size of breakpoint inst */
53#define	BKPT_SET(inst)	(BKPT_INST)
54
55#define db_clear_single_step	kdb_cpu_clear_singlestep
56#define db_set_single_step	kdb_cpu_set_singlestep
57
58#if 0
59#define	SR_SINGLESTEP	0x400
60#define	db_clear_single_step(regs)	((regs)->msr &= ~SR_SINGLESTEP)
61#define	db_set_single_step(regs)	((regs)->msr |=  SR_SINGLESTEP)
62#endif
63
64#define	T_BREAKPOINT	0xffff
65#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)
66
67#define T_WATCHPOINT	0xeeee
68#ifdef T_WATCHPOINT
69#define	IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT)
70#else
71#define	IS_WATCHPOINT_TRAP(type, code)	0
72#endif
73
74#define	M_RTS		0xfc0007fe
75#define	I_RTS		0x4c000020
76#define	M_BC		0xfc000000
77#define	I_BC		0x40000000
78#define	M_B		0xfc000000
79#define	I_B		0x50000000
80#define	M_RFI		0xfc0007fe
81#define	I_RFI		0x4c000064
82
83#define	inst_trap_return(ins)	(((ins)&M_RFI) == I_RFI)
84#define	inst_return(ins)	(((ins)&M_RTS) == I_RTS)
85#define	inst_call(ins)		(((ins)&M_BC ) == I_BC  || \
86				 ((ins)&M_B  ) == I_B )
87#define	inst_load(ins)		0
88#define	inst_store(ins)		0
89
90#define	DB_SMALL_VALUE_MAX	(0x7fffffff)
91#define	DB_SMALL_VALUE_MIN	(-0x40001)
92
93#endif	/* _POWERPC_DB_MACHDEP_H_ */
94