aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-frv/registers.h
blob: fccfd95cff684611a923380ad23f97b5d06a2689 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/* registers.h: register frame declarations
 *
 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

/*
 * notes:
 *
 * (1) that the members of all these structures are carefully aligned to permit
 *     usage of STD/STDF instructions
 *
 * (2) if you change these structures, you must change the code in
 *     arch/frvnommu/kernel/{break.S,entry.S,switch_to.S,gdb-stub.c}
 *
 *
 * the kernel stack space block looks like this:
 *
 *	+0x2000	+----------------------
 *		| union {
 *		|	struct user_context
 *		|	struct pt_regs [user exception]
 *		| }
 *		+---------------------- <-- __kernel_frame0_ptr (maybe GR28)
 *		|
 *		| kernel stack
 *		|
 *		|......................
 *		| struct pt_regs [kernel exception]
 *		|...................... <-- __kernel_frame0_ptr (maybe GR28)
 *		|
 *		| kernel stack
 *		|
 *		|...................... <-- stack pointer (GR1)
 *		|
 *		| unused stack space
 *		|
 *		+----------------------
 *		| struct thread_info
 *	+0x0000	+---------------------- <-- __current_thread_info (GR15);
 *
 * note that GR28 points to the current exception frame
 */

#ifndef _ASM_REGISTERS_H
#define _ASM_REGISTERS_H

#ifndef __ASSEMBLY__
#define __OFFSET(X)	(X)
#define __OFFSETC(X,N)	xxxxxxxxxxxxxxxxxxxxxxxx
#else
#define __OFFSET(X)	((X)*4)
#define __OFFSETC(X,N)	((X)*4+(N))
#endif

/*****************************************************************************/
/*
 * Exception/Interrupt frame
 * - held on kernel stack
 * - 8-byte aligned on stack (old SP is saved in frame)
 * - GR0 is fixed 0, so we don't save it
 */
#ifndef __ASSEMBLY__

struct pt_regs {
	unsigned long		psr;		/* Processor Status Register */
	unsigned long		isr;		/* Integer Status Register */
	unsigned long		ccr;		/* Condition Code Register */
	unsigned long		cccr;		/* Condition Code for Conditional Insns Register */
	unsigned long		lr;		/* Link Register */
	unsigned long		lcr;		/* Loop Count Register */
	unsigned long		pc;		/* Program Counter Register */
	unsigned long		__status;	/* exception status */
	unsigned long		syscallno;	/* syscall number or -1 */
	unsigned long		orig_gr8;	/* original syscall arg #1 */
	unsigned long		gner0;
	unsigned long		gner1;
	unsigned long long	iacc0;
	unsigned long		tbr;		/* GR0 is fixed zero, so we use this for TBR */
	unsigned long		sp;		/* GR1: USP/KSP */
	unsigned long		fp;		/* GR2: FP */
	unsigned long		gr3;
	unsigned long		gr4;
	unsigned long		gr5;
	unsigned long		gr6;
	unsigned long		gr7;		/* syscall number */
	unsigned long		gr8;		/* 1st syscall param; syscall return */
	unsigned long		gr9;		/* 2nd syscall param */
	unsigned long		gr10;		/* 3rd syscall param */
	unsigned long		gr11;		/* 4th syscall param */
	unsigned long		gr12;		/* 5th syscall param */
	unsigned long		gr13;		/* 6th syscall param */
	unsigned long		gr14;
	unsigned long		gr15;
	unsigned long		gr16;		/* GP pointer */
	unsigned long		gr17;		/* small data */
	unsigned long		gr18;		/* PIC/PID */
	unsigned long		gr19;
	unsigned long		gr20;
	unsigned long		gr21;
	unsigned long		gr22;
	unsigned long		gr23;
	unsigned long		gr24;
	unsigned long		gr25;
	unsigned long		gr26;
	unsigned long		gr27;
	struct pt_regs		*next_frame;	/* GR28 - next exception frame */
	unsigned long		gr29;		/* GR29 - OS reserved */
	unsigned long		gr30;		/* GR30 - OS reserved */
	unsigned long		gr31;		/* GR31 - OS reserved */
} __attribute__((aligned(8)));

#endif

#define REG_PSR		__OFFSET( 0)	/* Processor Status Register */
#define REG_ISR		__OFFSET( 1)	/* Integer Status Register */
#define REG_CCR		__OFFSET( 2)	/* Condition Code Register */
#define REG_CCCR	__OFFSET( 3)	/* Condition Code for Conditional Insns Register */
#define REG_LR		__OFFSET( 4)	/* Link Register */
#define REG_LCR		__OFFSET( 5)	/* Loop Count Register */
#define REG_PC		__OFFSET( 6)	/* Program Counter */

#define REG__STATUS	__OFFSET( 7)	/* exception status */
#define REG__STATUS_STEP	0x00000001	/* - reenable single stepping on return */
#define REG__STATUS_STEPPED	0x00000002	/* - single step caused exception */
#define REG__STATUS_BROKE	0x00000004	/* - BREAK insn caused exception */
#define REG__STATUS_SYSC_ENTRY	0x40000000	/* - T on syscall entry (ptrace.c only) */
#define REG__STATUS_SYSC_EXIT	0x80000000	/* - T on syscall exit (ptrace.c only) */

#define REG_SYSCALLNO	__OFFSET( 8)	/* syscall number or -1 */
#define REG_ORIG_GR8	__OFFSET( 9)	/* saved GR8 for signal handling */
#define REG_GNER0	__OFFSET(10)
#define REG_GNER1	__OFFSET(11)
#define REG_IACC0	__OFFSET(12)

#define REG_TBR		__OFFSET(14)	/* Trap Vector Register */
#define REG_GR(R)	__OFFSET((14+(R)))
#define REG__END	REG_GR(32)

#define REG_SP		REG_GR(1)
#define REG_FP		REG_GR(2)
#define REG_PREV_FRAME	REG_GR(28)	/* previous exception frame pointer (old gr28 value) */
#define REG_CURR_TASK	REG_GR(29)	/* current task */

/*****************************************************************************/
/*
 * extension tacked in front of the exception frame in debug mode
 */
#ifndef __ASSEMBLY__

struct pt_debug_regs
{
	unsigned long		bpsr;
	unsigned long		dcr;
	unsigned long		brr;
	unsigned long		nmar;
	struct pt_regs		normal_regs;
} __attribute__((aligned(8)));

#endif

#define REG_NMAR		__OFFSET(-1)
#define REG_BRR			__OFFSET(-2)
#define REG_DCR			__OFFSET(-3)
#define REG_BPSR		__OFFSET(-4)
#define REG__DEBUG_XTRA		__OFFSET(4)

/*****************************************************************************/
/*
 * userspace registers
 */
#ifndef __ASSEMBLY__

struct user_int_regs
{
	/* integer registers
	 * - up to gr[31] mirror pt_regs
	 * - total size must be multiple of 8 bytes
	 */
	unsigned long		psr;		/* Processor Status Register */
	unsigned long		isr;		/* Integer Status Register */
	unsigned long		ccr;		/* Condition Code Register */
	unsigned long		cccr;		/* Condition Code for Conditional Insns Register */
	unsigned long		lr;		/* Link Register */
	unsigned long		lcr;		/* Loop Count Register */
	unsigned long		pc;		/* Program Counter Register */
	unsigned long		__status;	/* exception status */
	unsigned long		syscallno;	/* syscall number or -1 */
	unsigned long		orig_gr8;	/* original syscall arg #1 */
	unsigned long		gner[2];
	unsigned long long	iacc[1];

	union {
		unsigned long	tbr;
		unsigned long	gr[64];
	};
};

struct user_fpmedia_regs
{
	/* FP/Media registers */
	unsigned long	fr[64];
	unsigned long	fner[2];
	unsigned long	msr[2];
	unsigned long	acc[8];
	unsigned char	accg[8];
	unsigned long	fsr[1];
};

struct user_context
{
	struct user_int_regs		i;
	struct user_fpmedia_regs	f;

	/* we provide a context extension so that we can save the regs for CPUs that
	 * implement many more of Fujitsu's lavish register spec
	 */
	void *extension;
} __attribute__((aligned(8)));

#endif

#define NR_USER_INT_REGS	(14 + 64)
#define NR_USER_FPMEDIA_REGS	(64 + 2 + 2 + 8 + 8/4 + 1)
#define NR_USER_CONTEXT		(NR_USER_INT_REGS + NR_USER_FPMEDIA_REGS + 1)

#define USER_CONTEXT_SIZE	(((NR_USER_CONTEXT + 1) & ~1) * 4)

#define __THREAD_FRAME		__OFFSET(0)
#define __THREAD_CURR		__OFFSET(1)
#define __THREAD_SP		__OFFSET(2)
#define __THREAD_FP		__OFFSET(3)
#define __THREAD_LR		__OFFSET(4)
#define __THREAD_PC		__OFFSET(5)
#define __THREAD_GR(R)		__OFFSET(6 + (R) - 16)
#define __THREAD_FRAME0		__OFFSET(19)
#define __THREAD_USER		__OFFSET(19)

#define __USER_INT		__OFFSET(0)
#define __INT_GR(R)		__OFFSET(14 + (R))

#define __USER_FPMEDIA		__OFFSET(NR_USER_INT_REGS)
#define __FPMEDIA_FR(R)		__OFFSET(NR_USER_INT_REGS + (R))
#define __FPMEDIA_FNER(R)	__OFFSET(NR_USER_INT_REGS + 64 + (R))
#define __FPMEDIA_MSR(R)	__OFFSET(NR_USER_INT_REGS + 66 + (R))
#define __FPMEDIA_ACC(R)	__OFFSET(NR_USER_INT_REGS + 68 + (R))
#define __FPMEDIA_ACCG(R)	__OFFSETC(NR_USER_INT_REGS + 76, (R))
#define __FPMEDIA_FSR(R)	__OFFSET(NR_USER_INT_REGS + 78 + (R))

#endif /* _ASM_REGISTERS_H */