1/*
2 * Copyright (C) 1998-2004 Hewlett-Packard Co
3 *	David Mosberger-Tang <davidm@hpl.hp.com>
4 *	Stephane Eranian <eranian@hpl.hp.com>
5 * Copyright (C) 2003 Intel Co
6 *	Suresh Siddha <suresh.b.siddha@intel.com>
7 *	Fenghua Yu <fenghua.yu@intel.com>
8 *	Arun Sharma <arun.sharma@intel.com>
9 *
10 * 12/07/98	S. Eranian	added pt_regs & switch_stack
11 * 12/21/98	D. Mosberger	updated to match latest code
12 *  6/17/99	D. Mosberger	added second unat member to "struct switch_stack"
13 *
14 */
15#ifndef _UAPI_ASM_IA64_PTRACE_H
16#define _UAPI_ASM_IA64_PTRACE_H
17
18/*
19 * When a user process is blocked, its state looks as follows:
20 *
21 *            +----------------------+	-------	IA64_STK_OFFSET
22 *     	      |			     |	 ^
23 *            | struct pt_regs       |	 |
24 *	      |			     |	 |
25 *            +----------------------+	 |
26 *	      |			     |	 |
27 *     	      |	   memory stack	     |	 |
28 *	      |	(growing downwards)  |	 |
29 *	      //.....................//	 |
30 *					 |
31 *	      //.....................//	 |
32 *	      |			     |	 |
33 *            +----------------------+	 |
34 *            | struct switch_stack  |	 |
35 *	      |			     |	 |
36 *	      +----------------------+	 |
37 *	      |			     |	 |
38 *	      //.....................//	 |
39 *					 |
40 *	      //.....................//	 |
41 *	      |			     |	 |
42 *	      |	 register stack	     |	 |
43 *	      |	(growing upwards)    |	 |
44 *            |			     |	 |
45 *	      +----------------------+	 |  ---	IA64_RBS_OFFSET
46 *            |  struct thread_info  |	 |  ^
47 *	      +----------------------+	 |  |
48 *	      |			     |	 |  |
49 *            |  struct task_struct  |	 |  |
50 * current -> |			     |   |  |
51 *	      +----------------------+ -------
52 *
53 * Note that ar.ec is not saved explicitly in pt_reg or switch_stack.
54 * This is because ar.ec is saved as part of ar.pfs.
55 */
56
57
58#include <asm/fpu.h>
59
60
61#ifndef __ASSEMBLY__
62
63/*
64 * This struct defines the way the registers are saved on system
65 * calls.
66 *
67 * We don't save all floating point register because the kernel
68 * is compiled to use only a very small subset, so the other are
69 * untouched.
70 *
71 * THIS STRUCTURE MUST BE A MULTIPLE 16-BYTE IN SIZE
72 * (because the memory stack pointer MUST ALWAYS be aligned this way)
73 *
74 */
75struct pt_regs {
76	/* The following registers are saved by SAVE_MIN: */
77	unsigned long b6;		/* scratch */
78	unsigned long b7;		/* scratch */
79
80	unsigned long ar_csd;           /* used by cmp8xchg16 (scratch) */
81	unsigned long ar_ssd;           /* reserved for future use (scratch) */
82
83	unsigned long r8;		/* scratch (return value register 0) */
84	unsigned long r9;		/* scratch (return value register 1) */
85	unsigned long r10;		/* scratch (return value register 2) */
86	unsigned long r11;		/* scratch (return value register 3) */
87
88	unsigned long cr_ipsr;		/* interrupted task's psr */
89	unsigned long cr_iip;		/* interrupted task's instruction pointer */
90	/*
91	 * interrupted task's function state; if bit 63 is cleared, it
92	 * contains syscall's ar.pfs.pfm:
93	 */
94	unsigned long cr_ifs;
95
96	unsigned long ar_unat;		/* interrupted task's NaT register (preserved) */
97	unsigned long ar_pfs;		/* prev function state  */
98	unsigned long ar_rsc;		/* RSE configuration */
99	/* The following two are valid only if cr_ipsr.cpl > 0 || ti->flags & _TIF_MCA_INIT */
100	unsigned long ar_rnat;		/* RSE NaT */
101	unsigned long ar_bspstore;	/* RSE bspstore */
102
103	unsigned long pr;		/* 64 predicate registers (1 bit each) */
104	unsigned long b0;		/* return pointer (bp) */
105	unsigned long loadrs;		/* size of dirty partition << 16 */
106
107	unsigned long r1;		/* the gp pointer */
108	unsigned long r12;		/* interrupted task's memory stack pointer */
109	unsigned long r13;		/* thread pointer */
110
111	unsigned long ar_fpsr;		/* floating point status (preserved) */
112	unsigned long r15;		/* scratch */
113
114	/* The remaining registers are NOT saved for system calls.  */
115
116	unsigned long r14;		/* scratch */
117	unsigned long r2;		/* scratch */
118	unsigned long r3;		/* scratch */
119
120	/* The following registers are saved by SAVE_REST: */
121	unsigned long r16;		/* scratch */
122	unsigned long r17;		/* scratch */
123	unsigned long r18;		/* scratch */
124	unsigned long r19;		/* scratch */
125	unsigned long r20;		/* scratch */
126	unsigned long r21;		/* scratch */
127	unsigned long r22;		/* scratch */
128	unsigned long r23;		/* scratch */
129	unsigned long r24;		/* scratch */
130	unsigned long r25;		/* scratch */
131	unsigned long r26;		/* scratch */
132	unsigned long r27;		/* scratch */
133	unsigned long r28;		/* scratch */
134	unsigned long r29;		/* scratch */
135	unsigned long r30;		/* scratch */
136	unsigned long r31;		/* scratch */
137
138	unsigned long ar_ccv;		/* compare/exchange value (scratch) */
139
140	/*
141	 * Floating point registers that the kernel considers scratch:
142	 */
143	struct ia64_fpreg f6;		/* scratch */
144	struct ia64_fpreg f7;		/* scratch */
145	struct ia64_fpreg f8;		/* scratch */
146	struct ia64_fpreg f9;		/* scratch */
147	struct ia64_fpreg f10;		/* scratch */
148	struct ia64_fpreg f11;		/* scratch */
149};
150
151/*
152 * This structure contains the addition registers that need to
153 * preserved across a context switch.  This generally consists of
154 * "preserved" registers.
155 */
156struct switch_stack {
157	unsigned long caller_unat;	/* user NaT collection register (preserved) */
158	unsigned long ar_fpsr;		/* floating-point status register */
159
160	struct ia64_fpreg f2;		/* preserved */
161	struct ia64_fpreg f3;		/* preserved */
162	struct ia64_fpreg f4;		/* preserved */
163	struct ia64_fpreg f5;		/* preserved */
164
165	struct ia64_fpreg f12;		/* scratch, but untouched by kernel */
166	struct ia64_fpreg f13;		/* scratch, but untouched by kernel */
167	struct ia64_fpreg f14;		/* scratch, but untouched by kernel */
168	struct ia64_fpreg f15;		/* scratch, but untouched by kernel */
169	struct ia64_fpreg f16;		/* preserved */
170	struct ia64_fpreg f17;		/* preserved */
171	struct ia64_fpreg f18;		/* preserved */
172	struct ia64_fpreg f19;		/* preserved */
173	struct ia64_fpreg f20;		/* preserved */
174	struct ia64_fpreg f21;		/* preserved */
175	struct ia64_fpreg f22;		/* preserved */
176	struct ia64_fpreg f23;		/* preserved */
177	struct ia64_fpreg f24;		/* preserved */
178	struct ia64_fpreg f25;		/* preserved */
179	struct ia64_fpreg f26;		/* preserved */
180	struct ia64_fpreg f27;		/* preserved */
181	struct ia64_fpreg f28;		/* preserved */
182	struct ia64_fpreg f29;		/* preserved */
183	struct ia64_fpreg f30;		/* preserved */
184	struct ia64_fpreg f31;		/* preserved */
185
186	unsigned long r4;		/* preserved */
187	unsigned long r5;		/* preserved */
188	unsigned long r6;		/* preserved */
189	unsigned long r7;		/* preserved */
190
191	unsigned long b0;		/* so we can force a direct return in copy_thread */
192	unsigned long b1;
193	unsigned long b2;
194	unsigned long b3;
195	unsigned long b4;
196	unsigned long b5;
197
198	unsigned long ar_pfs;		/* previous function state */
199	unsigned long ar_lc;		/* loop counter (preserved) */
200	unsigned long ar_unat;		/* NaT bits for r4-r7 */
201	unsigned long ar_rnat;		/* RSE NaT collection register */
202	unsigned long ar_bspstore;	/* RSE dirty base (preserved) */
203	unsigned long pr;		/* 64 predicate registers (1 bit each) */
204};
205
206
207/* pt_all_user_regs is used for PTRACE_GETREGS PTRACE_SETREGS */
208struct pt_all_user_regs {
209	unsigned long nat;
210	unsigned long cr_iip;
211	unsigned long cfm;
212	unsigned long cr_ipsr;
213	unsigned long pr;
214
215	unsigned long gr[32];
216	unsigned long br[8];
217	unsigned long ar[128];
218	struct ia64_fpreg fr[128];
219};
220
221#endif /* !__ASSEMBLY__ */
222
223/* indices to application-registers array in pt_all_user_regs */
224#define PT_AUR_RSC	16
225#define PT_AUR_BSP	17
226#define PT_AUR_BSPSTORE	18
227#define PT_AUR_RNAT	19
228#define PT_AUR_CCV	32
229#define PT_AUR_UNAT	36
230#define PT_AUR_FPSR	40
231#define PT_AUR_PFS	64
232#define PT_AUR_LC	65
233#define PT_AUR_EC	66
234
235/*
236 * The numbers chosen here are somewhat arbitrary but absolutely MUST
237 * not overlap with any of the number assigned in <linux/ptrace.h>.
238 */
239#define PTRACE_SINGLEBLOCK	12	/* resume execution until next branch */
240#define PTRACE_OLD_GETSIGINFO	13	/* (replaced by PTRACE_GETSIGINFO in <linux/ptrace.h>)  */
241#define PTRACE_OLD_SETSIGINFO	14	/* (replaced by PTRACE_SETSIGINFO in <linux/ptrace.h>)  */
242#define PTRACE_GETREGS		18	/* get all registers (pt_all_user_regs) in one shot */
243#define PTRACE_SETREGS		19	/* set all registers (pt_all_user_regs) in one shot */
244
245#define PTRACE_OLDSETOPTIONS	21
246
247#endif /* _UAPI_ASM_IA64_PTRACE_H */
248