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1/* SPDX-License-Identifier: GPL-2.0 */
2/* thread_info.h: sparc64 low-level thread information
3 *
4 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
5 */
6
7#ifndef _ASM_THREAD_INFO_H
8#define _ASM_THREAD_INFO_H
9
10#ifdef __KERNEL__
11
12#define NSWINS 7
13
14#define TI_FLAG_BYTE_FAULT_CODE 0
15#define TI_FLAG_FAULT_CODE_SHIFT 56
16#define TI_FLAG_BYTE_WSTATE 1
17#define TI_FLAG_WSTATE_SHIFT 48
18#define TI_FLAG_BYTE_NOERROR 2
19#define TI_FLAG_BYTE_NOERROR_SHIFT 40
20#define TI_FLAG_BYTE_FPDEPTH 3
21#define TI_FLAG_FPDEPTH_SHIFT 32
22#define TI_FLAG_BYTE_CWP 4
23#define TI_FLAG_CWP_SHIFT 24
24#define TI_FLAG_BYTE_WSAVED 5
25#define TI_FLAG_WSAVED_SHIFT 16
26
27#include <asm/page.h>
28
29#ifndef __ASSEMBLY__
30
31#include <asm/ptrace.h>
32#include <asm/types.h>
33
34struct task_struct;
35
36struct thread_info {
37 /* D$ line 1 */
38 struct task_struct *task;
39 unsigned long flags;
40 __u8 fpsaved[7];
41 __u8 status;
42 unsigned long ksp;
43
44 /* D$ line 2 */
45 unsigned long fault_address;
46 struct pt_regs *kregs;
47 int preempt_count; /* 0 => preemptable, <0 => BUG */
48 __u8 new_child;
49 __u8 __pad;
50 __u16 cpu;
51
52 unsigned long *utraps;
53
54 struct reg_window reg_window[NSWINS];
55 unsigned long rwbuf_stkptrs[NSWINS];
56
57 unsigned long gsr[7];
58 unsigned long xfsr[7];
59
60 struct pt_regs *kern_una_regs;
61 unsigned int kern_una_insn;
62
63 unsigned long fpregs[(7 * 256) / sizeof(unsigned long)]
64 __attribute__ ((aligned(64)));
65};
66
67#endif /* !(__ASSEMBLY__) */
68
69/* offsets into the thread_info struct for assembly code access */
70#define TI_TASK 0x00000000
71#define TI_FLAGS 0x00000008
72#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
73#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
74#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
75#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
76#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
77#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
78#define TI_FPSAVED 0x00000010
79#define TI_KSP 0x00000018
80#define TI_FAULT_ADDR 0x00000020
81#define TI_KREGS 0x00000028
82#define TI_PRE_COUNT 0x00000030
83#define TI_NEW_CHILD 0x00000034
84#define TI_CPU 0x00000036
85#define TI_UTRAPS 0x00000038
86#define TI_REG_WINDOW 0x00000040
87#define TI_RWIN_SPTRS 0x000003c0
88#define TI_GSR 0x000003f8
89#define TI_XFSR 0x00000430
90#define TI_KUNA_REGS 0x00000468
91#define TI_KUNA_INSN 0x00000470
92#define TI_FPREGS 0x00000480
93
94/* We embed this in the uppermost byte of thread_info->flags */
95#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
96#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
97#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
98#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
99#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
100#define FAULT_CODE_BAD_RA 0x20 /* Bad RA for sun4v */
101
102#if PAGE_SHIFT == 13
103#define THREAD_SIZE (2*PAGE_SIZE)
104#define THREAD_SHIFT (PAGE_SHIFT + 1)
105#else /* PAGE_SHIFT == 13 */
106#define THREAD_SIZE PAGE_SIZE
107#define THREAD_SHIFT PAGE_SHIFT
108#endif /* PAGE_SHIFT == 13 */
109
110/*
111 * macros/functions for gaining access to the thread information structure
112 */
113#ifndef __ASSEMBLY__
114
115#define INIT_THREAD_INFO(tsk) \
116{ \
117 .task = &tsk, \
118 .preempt_count = INIT_PREEMPT_COUNT, \
119 .kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \
120}
121
122/* how to get the thread information struct from C */
123#ifndef BUILD_VDSO
124register struct thread_info *current_thread_info_reg asm("g6");
125#define current_thread_info() (current_thread_info_reg)
126#else
127extern struct thread_info *current_thread_info(void);
128#endif
129
130/* thread information allocation */
131#if PAGE_SHIFT == 13
132#define THREAD_SIZE_ORDER 1
133#else /* PAGE_SHIFT == 13 */
134#define THREAD_SIZE_ORDER 0
135#endif /* PAGE_SHIFT == 13 */
136
137#define __thread_flag_byte_ptr(ti) \
138 ((unsigned char *)(&((ti)->flags)))
139#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info())
140
141#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
142#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
143#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
144#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
145#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
146#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
147#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
148#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
149#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
150#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
151#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
152#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
153#endif /* !(__ASSEMBLY__) */
154
155/*
156 * Thread information flags, only 16 bits are available as we encode
157 * other values into the upper 6 bytes.
158 *
159 * On trap return we need to test several values:
160 *
161 * user: need_resched, notify_resume, sigpending, wsaved
162 * kernel: fpdepth
163 *
164 * So to check for work in the kernel case we simply load the fpdepth
165 * byte out of the flags and test it. For the user case we encode the
166 * lower 3 bytes of flags as follows:
167 * ----------------------------------------
168 * | wsaved | flags byte 1 | flags byte 2 |
169 * ----------------------------------------
170 * This optimizes the user test into:
171 * ldx [%g6 + TI_FLAGS], REG1
172 * sethi %hi(_TIF_USER_WORK_MASK), REG2
173 * or REG2, %lo(_TIF_USER_WORK_MASK), REG2
174 * andcc REG1, REG2, %g0
175 * be,pt no_work_to_do
176 * nop
177 */
178#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
179#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
180#define TIF_SIGPENDING 2 /* signal pending */
181#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
182#define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */
183#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
184#define TIF_UPROBE 6 /* breakpointed or singlestepped */
185#define TIF_32BIT 7 /* 32-bit binary */
186#define TIF_NOHZ 8 /* in adaptive nohz mode */
187#define TIF_SECCOMP 9 /* secure computing */
188#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
189#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
190/* NOTE: Thread flags >= 12 should be ones we have no interest
191 * in using in assembly, else we can't use the mask as
192 * an immediate value in instructions such as andcc.
193 */
194#define TIF_MCDPER 12 /* Precise MCD exception */
195#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
196#define TIF_POLLING_NRFLAG 14
197
198#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
199#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
200#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
201#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
202#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
203#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
204#define _TIF_UPROBE (1<<TIF_UPROBE)
205#define _TIF_32BIT (1<<TIF_32BIT)
206#define _TIF_NOHZ (1<<TIF_NOHZ)
207#define _TIF_SECCOMP (1<<TIF_SECCOMP)
208#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
209#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
210#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
211
212#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
213 _TIF_DO_NOTIFY_RESUME_MASK | \
214 _TIF_NEED_RESCHED)
215#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
216 _TIF_SIGPENDING | _TIF_UPROBE | \
217 _TIF_NOTIFY_SIGNAL)
218
219#define is_32bit_task() (test_thread_flag(TIF_32BIT))
220
221/*
222 * Thread-synchronous status.
223 *
224 * This is different from the flags in that nobody else
225 * ever touches our thread-synchronous status, so we don't
226 * have to worry about atomic accesses.
227 *
228 * Note that there are only 8 bits available.
229 */
230
231#ifndef __ASSEMBLY__
232
233#define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0)
234#define test_thread_64bit_stack(__SP) \
235 ((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \
236 false : true)
237
238#endif /* !__ASSEMBLY__ */
239
240#endif /* __KERNEL__ */
241
242#endif /* _ASM_THREAD_INFO_H */
1/* thread_info.h: sparc64 low-level thread information
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 */
5
6#ifndef _ASM_THREAD_INFO_H
7#define _ASM_THREAD_INFO_H
8
9#ifdef __KERNEL__
10
11#define NSWINS 7
12
13#define TI_FLAG_BYTE_FAULT_CODE 0
14#define TI_FLAG_FAULT_CODE_SHIFT 56
15#define TI_FLAG_BYTE_WSTATE 1
16#define TI_FLAG_WSTATE_SHIFT 48
17#define TI_FLAG_BYTE_NOERROR 2
18#define TI_FLAG_BYTE_NOERROR_SHIFT 40
19#define TI_FLAG_BYTE_FPDEPTH 3
20#define TI_FLAG_FPDEPTH_SHIFT 32
21#define TI_FLAG_BYTE_CWP 4
22#define TI_FLAG_CWP_SHIFT 24
23#define TI_FLAG_BYTE_WSAVED 5
24#define TI_FLAG_WSAVED_SHIFT 16
25
26#include <asm/page.h>
27
28#ifndef __ASSEMBLY__
29
30#include <asm/ptrace.h>
31#include <asm/types.h>
32
33struct task_struct;
34
35struct thread_info {
36 /* D$ line 1 */
37 struct task_struct *task;
38 unsigned long flags;
39 __u8 fpsaved[7];
40 __u8 status;
41 unsigned long ksp;
42
43 /* D$ line 2 */
44 unsigned long fault_address;
45 struct pt_regs *kregs;
46 int preempt_count; /* 0 => preemptable, <0 => BUG */
47 __u8 new_child;
48 __u8 current_ds;
49 __u16 cpu;
50
51 unsigned long *utraps;
52
53 struct reg_window reg_window[NSWINS];
54 unsigned long rwbuf_stkptrs[NSWINS];
55
56 unsigned long gsr[7];
57 unsigned long xfsr[7];
58
59 struct pt_regs *kern_una_regs;
60 unsigned int kern_una_insn;
61
62 unsigned long fpregs[(7 * 256) / sizeof(unsigned long)]
63 __attribute__ ((aligned(64)));
64};
65
66#endif /* !(__ASSEMBLY__) */
67
68/* offsets into the thread_info struct for assembly code access */
69#define TI_TASK 0x00000000
70#define TI_FLAGS 0x00000008
71#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
72#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
73#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
74#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
75#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
76#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
77#define TI_FPSAVED 0x00000010
78#define TI_KSP 0x00000018
79#define TI_FAULT_ADDR 0x00000020
80#define TI_KREGS 0x00000028
81#define TI_PRE_COUNT 0x00000030
82#define TI_NEW_CHILD 0x00000034
83#define TI_CURRENT_DS 0x00000035
84#define TI_CPU 0x00000036
85#define TI_UTRAPS 0x00000038
86#define TI_REG_WINDOW 0x00000040
87#define TI_RWIN_SPTRS 0x000003c0
88#define TI_GSR 0x000003f8
89#define TI_XFSR 0x00000430
90#define TI_KUNA_REGS 0x00000468
91#define TI_KUNA_INSN 0x00000470
92#define TI_FPREGS 0x00000480
93
94/* We embed this in the uppermost byte of thread_info->flags */
95#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
96#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
97#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
98#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
99#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
100#define FAULT_CODE_BAD_RA 0x20 /* Bad RA for sun4v */
101
102#if PAGE_SHIFT == 13
103#define THREAD_SIZE (2*PAGE_SIZE)
104#define THREAD_SHIFT (PAGE_SHIFT + 1)
105#else /* PAGE_SHIFT == 13 */
106#define THREAD_SIZE PAGE_SIZE
107#define THREAD_SHIFT PAGE_SHIFT
108#endif /* PAGE_SHIFT == 13 */
109
110/*
111 * macros/functions for gaining access to the thread information structure
112 */
113#ifndef __ASSEMBLY__
114
115#define INIT_THREAD_INFO(tsk) \
116{ \
117 .task = &tsk, \
118 .current_ds = ASI_P, \
119 .preempt_count = INIT_PREEMPT_COUNT, \
120}
121
122#define init_thread_info (init_thread_union.thread_info)
123#define init_stack (init_thread_union.stack)
124
125/* how to get the thread information struct from C */
126register struct thread_info *current_thread_info_reg asm("g6");
127#define current_thread_info() (current_thread_info_reg)
128
129/* thread information allocation */
130#if PAGE_SHIFT == 13
131#define THREAD_SIZE_ORDER 1
132#else /* PAGE_SHIFT == 13 */
133#define THREAD_SIZE_ORDER 0
134#endif /* PAGE_SHIFT == 13 */
135
136#define __thread_flag_byte_ptr(ti) \
137 ((unsigned char *)(&((ti)->flags)))
138#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info())
139
140#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
141#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
142#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
143#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
144#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
145#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
146#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
147#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
148#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
149#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
150#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
151#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
152#endif /* !(__ASSEMBLY__) */
153
154/*
155 * Thread information flags, only 16 bits are available as we encode
156 * other values into the upper 6 bytes.
157 *
158 * On trap return we need to test several values:
159 *
160 * user: need_resched, notify_resume, sigpending, wsaved
161 * kernel: fpdepth
162 *
163 * So to check for work in the kernel case we simply load the fpdepth
164 * byte out of the flags and test it. For the user case we encode the
165 * lower 3 bytes of flags as follows:
166 * ----------------------------------------
167 * | wsaved | flags byte 1 | flags byte 2 |
168 * ----------------------------------------
169 * This optimizes the user test into:
170 * ldx [%g6 + TI_FLAGS], REG1
171 * sethi %hi(_TIF_USER_WORK_MASK), REG2
172 * or REG2, %lo(_TIF_USER_WORK_MASK), REG2
173 * andcc REG1, REG2, %g0
174 * be,pt no_work_to_do
175 * nop
176 */
177#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
178#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
179#define TIF_SIGPENDING 2 /* signal pending */
180#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
181/* flag bit 4 is available */
182#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
183#define TIF_UPROBE 6 /* breakpointed or singlestepped */
184#define TIF_32BIT 7 /* 32-bit binary */
185#define TIF_NOHZ 8 /* in adaptive nohz mode */
186#define TIF_SECCOMP 9 /* secure computing */
187#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
188#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
189/* NOTE: Thread flags >= 12 should be ones we have no interest
190 * in using in assembly, else we can't use the mask as
191 * an immediate value in instructions such as andcc.
192 */
193/* flag bit 12 is available */
194#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
195#define TIF_POLLING_NRFLAG 14
196
197#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
198#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
199#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
200#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
201#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
202#define _TIF_UPROBE (1<<TIF_UPROBE)
203#define _TIF_32BIT (1<<TIF_32BIT)
204#define _TIF_NOHZ (1<<TIF_NOHZ)
205#define _TIF_SECCOMP (1<<TIF_SECCOMP)
206#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
207#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
208#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
209
210#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
211 _TIF_DO_NOTIFY_RESUME_MASK | \
212 _TIF_NEED_RESCHED)
213#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
214 _TIF_SIGPENDING | _TIF_UPROBE)
215
216#define is_32bit_task() (test_thread_flag(TIF_32BIT))
217
218/*
219 * Thread-synchronous status.
220 *
221 * This is different from the flags in that nobody else
222 * ever touches our thread-synchronous status, so we don't
223 * have to worry about atomic accesses.
224 *
225 * Note that there are only 8 bits available.
226 */
227
228#ifndef __ASSEMBLY__
229
230#define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0)
231#define test_thread_64bit_stack(__SP) \
232 ((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \
233 false : true)
234
235#endif /* !__ASSEMBLY__ */
236
237#endif /* __KERNEL__ */
238
239#endif /* _ASM_THREAD_INFO_H */