1/*
2 * include/asm-v850/ptrace.h -- Access to CPU registers
3 *
4 *  Copyright (C) 2001,02,03  NEC Electronics Corporation
5 *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License.  See the file COPYING in the main directory of this
9 * archive for more details.
10 *
11 * Written by Miles Bader <miles@gnu.org>
12 */
13
14#ifndef __V850_PTRACE_H__
15#define __V850_PTRACE_H__
16
17
18/* v850 general purpose registers with special meanings.  */
19#define GPR_ZERO	0	/* constant zero */
20#define GPR_ASM		1	/* reserved for assembler */
21#define GPR_SP		3	/* stack pointer */
22#define GPR_GP		4	/* global data pointer */
23#define GPR_TP		5	/* `text pointer' */
24#define GPR_EP		30	/* `element pointer' */
25#define GPR_LP		31	/* link pointer (current return address) */
26
27/* These aren't official names, but they make some code more descriptive.  */
28#define GPR_ARG0	6
29#define GPR_ARG1	7
30#define GPR_ARG2	8
31#define GPR_ARG3	9
32#define GPR_RVAL0	10
33#define GPR_RVAL1	11
34#define GPR_RVAL	GPR_RVAL0
35
36#define NUM_GPRS	32
37
38/* v850 `system' registers.  */
39#define SR_EIPC		0
40#define SR_EIPSW	1
41#define SR_FEPC		2
42#define SR_FEPSW	3
43#define SR_ECR		4
44#define SR_PSW		5
45#define SR_CTPC		16
46#define SR_CTPSW	17
47#define SR_DBPC		18
48#define SR_DBPSW	19
49#define SR_CTBP		20
50#define SR_DIR		21
51#define SR_ASID		23
52
53
54#ifndef __ASSEMBLY__
55
56typedef unsigned long v850_reg_t;
57
58/* How processor state is stored on the stack during a syscall/signal.
59   If you change this structure, change the associated assembly-language
60   macros below too (PT_*)!  */
61struct pt_regs
62{
63	/* General purpose registers.  */
64	v850_reg_t gpr[NUM_GPRS];
65
66	v850_reg_t pc;		/* program counter */
67	v850_reg_t psw;		/* program status word */
68
69	/* Registers used by `callt' instruction:  */
70	v850_reg_t ctpc;	/* saved program counter */
71	v850_reg_t ctpsw;	/* saved psw */
72	v850_reg_t ctbp;	/* base pointer for callt table */
73
74	char kernel_mode;	/* 1 if in `kernel mode', 0 if user mode */
75};
76
77
78#define instruction_pointer(regs)	((regs)->pc)
79#define profile_pc(regs) instruction_pointer(regs)
80#define user_mode(regs)			(!(regs)->kernel_mode)
81
82/* When a struct pt_regs is used to save user state for a system call in
83   the kernel, the system call is stored in the space for R0 (since it's
84   never used otherwise, R0 being a constant 0).  Non-system-calls
85   simply store 0 there.  */
86#define PT_REGS_SYSCALL(regs)		(regs)->gpr[0]
87#define PT_REGS_SET_SYSCALL(regs, val)	((regs)->gpr[0] = (val))
88
89#endif /* !__ASSEMBLY__ */
90
91
92/* The number of bytes used to store each register.  */
93#define _PT_REG_SIZE	4
94
95/* Offset of a general purpose register in a struct pt_regs.  */
96#define PT_GPR(num)	((num) * _PT_REG_SIZE)
97
98/* Offsets of various special registers & fields in a struct pt_regs.  */
99#define PT_PC		((NUM_GPRS + 0) * _PT_REG_SIZE)
100#define PT_PSW		((NUM_GPRS + 1) * _PT_REG_SIZE)
101#define PT_CTPC		((NUM_GPRS + 2) * _PT_REG_SIZE)
102#define PT_CTPSW	((NUM_GPRS + 3) * _PT_REG_SIZE)
103#define PT_CTBP		((NUM_GPRS + 4) * _PT_REG_SIZE)
104#define PT_KERNEL_MODE	((NUM_GPRS + 5) * _PT_REG_SIZE)
105
106/* Where the current syscall number is stashed; obviously only valid in
107   the kernel!  */
108#define PT_CUR_SYSCALL	PT_GPR(0)
109
110/* Size of struct pt_regs, including alignment.  */
111#define PT_SIZE		((NUM_GPRS + 6) * _PT_REG_SIZE)
112
113
114/* These are `magic' values for PTRACE_PEEKUSR that return info about where
115   a process is located in memory.  */
116#define PT_TEXT_ADDR	(PT_SIZE + 1)
117#define PT_TEXT_LEN	(PT_SIZE + 2)
118#define PT_DATA_ADDR	(PT_SIZE + 3)
119
120
121#endif /* __V850_PTRACE_H__ */
122