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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 current_ds;
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_CURRENT_DS 0x00000035
85#define TI_CPU 0x00000036
86#define TI_UTRAPS 0x00000038
87#define TI_REG_WINDOW 0x00000040
88#define TI_RWIN_SPTRS 0x000003c0
89#define TI_GSR 0x000003f8
90#define TI_XFSR 0x00000430
91#define TI_KUNA_REGS 0x00000468
92#define TI_KUNA_INSN 0x00000470
93#define TI_FPREGS 0x00000480
94
95/* We embed this in the uppermost byte of thread_info->flags */
96#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
97#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
98#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
99#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
100#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
101#define FAULT_CODE_BAD_RA 0x20 /* Bad RA for sun4v */
102
103#if PAGE_SHIFT == 13
104#define THREAD_SIZE (2*PAGE_SIZE)
105#define THREAD_SHIFT (PAGE_SHIFT + 1)
106#else /* PAGE_SHIFT == 13 */
107#define THREAD_SIZE PAGE_SIZE
108#define THREAD_SHIFT PAGE_SHIFT
109#endif /* PAGE_SHIFT == 13 */
110
111/*
112 * macros/functions for gaining access to the thread information structure
113 */
114#ifndef __ASSEMBLY__
115
116#define INIT_THREAD_INFO(tsk) \
117{ \
118 .task = &tsk, \
119 .current_ds = ASI_P, \
120 .preempt_count = INIT_PREEMPT_COUNT, \
121}
122
123/* how to get the thread information struct from C */
124#ifndef BUILD_VDSO
125register struct thread_info *current_thread_info_reg asm("g6");
126#define current_thread_info() (current_thread_info_reg)
127#else
128extern struct thread_info *current_thread_info(void);
129#endif
130
131/* thread information allocation */
132#if PAGE_SHIFT == 13
133#define THREAD_SIZE_ORDER 1
134#else /* PAGE_SHIFT == 13 */
135#define THREAD_SIZE_ORDER 0
136#endif /* PAGE_SHIFT == 13 */
137
138#define __thread_flag_byte_ptr(ti) \
139 ((unsigned char *)(&((ti)->flags)))
140#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info())
141
142#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
143#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
144#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
145#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
146#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
147#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
148#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
149#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
150#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
151#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
152#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
153#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
154#endif /* !(__ASSEMBLY__) */
155
156/*
157 * Thread information flags, only 16 bits are available as we encode
158 * other values into the upper 6 bytes.
159 *
160 * On trap return we need to test several values:
161 *
162 * user: need_resched, notify_resume, sigpending, wsaved
163 * kernel: fpdepth
164 *
165 * So to check for work in the kernel case we simply load the fpdepth
166 * byte out of the flags and test it. For the user case we encode the
167 * lower 3 bytes of flags as follows:
168 * ----------------------------------------
169 * | wsaved | flags byte 1 | flags byte 2 |
170 * ----------------------------------------
171 * This optimizes the user test into:
172 * ldx [%g6 + TI_FLAGS], REG1
173 * sethi %hi(_TIF_USER_WORK_MASK), REG2
174 * or REG2, %lo(_TIF_USER_WORK_MASK), REG2
175 * andcc REG1, REG2, %g0
176 * be,pt no_work_to_do
177 * nop
178 */
179#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
180#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
181#define TIF_SIGPENDING 2 /* signal pending */
182#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
183/* flag bit 4 is available */
184#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
185#define TIF_UPROBE 6 /* breakpointed or singlestepped */
186#define TIF_32BIT 7 /* 32-bit binary */
187#define TIF_NOHZ 8 /* in adaptive nohz mode */
188#define TIF_SECCOMP 9 /* secure computing */
189#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
190#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
191/* NOTE: Thread flags >= 12 should be ones we have no interest
192 * in using in assembly, else we can't use the mask as
193 * an immediate value in instructions such as andcc.
194 */
195#define TIF_MCDPER 12 /* Precise MCD exception */
196#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
197#define TIF_POLLING_NRFLAG 14
198
199#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
200#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
201#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
202#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
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
218#define is_32bit_task() (test_thread_flag(TIF_32BIT))
219
220/*
221 * Thread-synchronous status.
222 *
223 * This is different from the flags in that nobody else
224 * ever touches our thread-synchronous status, so we don't
225 * have to worry about atomic accesses.
226 *
227 * Note that there are only 8 bits available.
228 */
229
230#ifndef __ASSEMBLY__
231
232#define thread32_stack_is_64bit(__SP) (((__SP) & 0x1) != 0)
233#define test_thread_64bit_stack(__SP) \
234 ((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \
235 false : true)
236
237#endif /* !__ASSEMBLY__ */
238
239#endif /* __KERNEL__ */
240
241#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_CWP 2
18#define TI_FLAG_CWP_SHIFT 40
19#define TI_FLAG_BYTE_CURRENT_DS 3
20#define TI_FLAG_CURRENT_DS_SHIFT 32
21#define TI_FLAG_BYTE_FPDEPTH 4
22#define TI_FLAG_FPDEPTH_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;
34struct exec_domain;
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 struct exec_domain *exec_domain;
48 int preempt_count; /* 0 => preemptable, <0 => BUG */
49 __u8 new_child;
50 __u8 syscall_noerror;
51 __u16 cpu;
52
53 unsigned long *utraps;
54
55 struct reg_window reg_window[NSWINS];
56 unsigned long rwbuf_stkptrs[NSWINS];
57
58 unsigned long gsr[7];
59 unsigned long xfsr[7];
60
61 struct restart_block restart_block;
62
63 struct pt_regs *kern_una_regs;
64 unsigned int kern_una_insn;
65
66 unsigned long fpregs[0] __attribute__ ((aligned(64)));
67};
68
69#endif /* !(__ASSEMBLY__) */
70
71/* offsets into the thread_info struct for assembly code access */
72#define TI_TASK 0x00000000
73#define TI_FLAGS 0x00000008
74#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
75#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
76#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
77#define TI_CURRENT_DS (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
78#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
79#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
80#define TI_FPSAVED 0x00000010
81#define TI_KSP 0x00000018
82#define TI_FAULT_ADDR 0x00000020
83#define TI_KREGS 0x00000028
84#define TI_EXEC_DOMAIN 0x00000030
85#define TI_PRE_COUNT 0x00000038
86#define TI_NEW_CHILD 0x0000003c
87#define TI_SYS_NOERROR 0x0000003d
88#define TI_CPU 0x0000003e
89#define TI_UTRAPS 0x00000040
90#define TI_REG_WINDOW 0x00000048
91#define TI_RWIN_SPTRS 0x000003c8
92#define TI_GSR 0x00000400
93#define TI_XFSR 0x00000438
94#define TI_RESTART_BLOCK 0x00000470
95#define TI_KUNA_REGS 0x000004a0
96#define TI_KUNA_INSN 0x000004a8
97#define TI_FPREGS 0x000004c0
98
99/* We embed this in the uppermost byte of thread_info->flags */
100#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
101#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
102#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
103#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
104#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
105
106#if PAGE_SHIFT == 13
107#define THREAD_SIZE (2*PAGE_SIZE)
108#define THREAD_SHIFT (PAGE_SHIFT + 1)
109#else /* PAGE_SHIFT == 13 */
110#define THREAD_SIZE PAGE_SIZE
111#define THREAD_SHIFT PAGE_SHIFT
112#endif /* PAGE_SHIFT == 13 */
113
114#define PREEMPT_ACTIVE 0x10000000
115
116/*
117 * macros/functions for gaining access to the thread information structure
118 */
119#ifndef __ASSEMBLY__
120
121#define INIT_THREAD_INFO(tsk) \
122{ \
123 .task = &tsk, \
124 .flags = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT, \
125 .exec_domain = &default_exec_domain, \
126 .preempt_count = INIT_PREEMPT_COUNT, \
127 .restart_block = { \
128 .fn = do_no_restart_syscall, \
129 }, \
130}
131
132#define init_thread_info (init_thread_union.thread_info)
133#define init_stack (init_thread_union.stack)
134
135/* how to get the thread information struct from C */
136register struct thread_info *current_thread_info_reg asm("g6");
137#define current_thread_info() (current_thread_info_reg)
138
139/* thread information allocation */
140#if PAGE_SHIFT == 13
141#define __THREAD_INFO_ORDER 1
142#else /* PAGE_SHIFT == 13 */
143#define __THREAD_INFO_ORDER 0
144#endif /* PAGE_SHIFT == 13 */
145
146#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
147
148#ifdef CONFIG_DEBUG_STACK_USAGE
149#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
150#else
151#define THREAD_FLAGS (GFP_KERNEL)
152#endif
153
154#define alloc_thread_info_node(tsk, node) \
155({ \
156 struct page *page = alloc_pages_node(node, THREAD_FLAGS, \
157 __THREAD_INFO_ORDER); \
158 struct thread_info *ret; \
159 \
160 ret = page ? page_address(page) : NULL; \
161 ret; \
162})
163
164#define free_thread_info(ti) \
165 free_pages((unsigned long)(ti),__THREAD_INFO_ORDER)
166
167#define __thread_flag_byte_ptr(ti) \
168 ((unsigned char *)(&((ti)->flags)))
169#define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info())
170
171#define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
172#define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
173#define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
174#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
175#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
176#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
177#define get_thread_current_ds() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
178#define set_thread_current_ds(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
179#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
180#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
181#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
182#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
183
184#endif /* !(__ASSEMBLY__) */
185
186/*
187 * Thread information flags, only 16 bits are available as we encode
188 * other values into the upper 6 bytes.
189 *
190 * On trap return we need to test several values:
191 *
192 * user: need_resched, notify_resume, sigpending, wsaved
193 * kernel: fpdepth
194 *
195 * So to check for work in the kernel case we simply load the fpdepth
196 * byte out of the flags and test it. For the user case we encode the
197 * lower 3 bytes of flags as follows:
198 * ----------------------------------------
199 * | wsaved | flags byte 1 | flags byte 2 |
200 * ----------------------------------------
201 * This optimizes the user test into:
202 * ldx [%g6 + TI_FLAGS], REG1
203 * sethi %hi(_TIF_USER_WORK_MASK), REG2
204 * or REG2, %lo(_TIF_USER_WORK_MASK), REG2
205 * andcc REG1, REG2, %g0
206 * be,pt no_work_to_do
207 * nop
208 */
209#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
210#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
211#define TIF_SIGPENDING 2 /* signal pending */
212#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
213/* flag bit 4 is available */
214#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
215/* flag bit 6 is available */
216#define TIF_32BIT 7 /* 32-bit binary */
217/* flag bit 8 is available */
218#define TIF_SECCOMP 9 /* secure computing */
219#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
220#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
221/* NOTE: Thread flags >= 12 should be ones we have no interest
222 * in using in assembly, else we can't use the mask as
223 * an immediate value in instructions such as andcc.
224 */
225/* flag bit 12 is available */
226#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
227#define TIF_POLLING_NRFLAG 14
228#define TIF_FREEZE 15 /* is freezing for suspend */
229
230#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
231#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
232#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
233#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
234#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
235#define _TIF_32BIT (1<<TIF_32BIT)
236#define _TIF_SECCOMP (1<<TIF_SECCOMP)
237#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
238#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
239#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
240#define _TIF_FREEZE (1<<TIF_FREEZE)
241
242#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
243 _TIF_DO_NOTIFY_RESUME_MASK | \
244 _TIF_NEED_RESCHED)
245#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
246
247/*
248 * Thread-synchronous status.
249 *
250 * This is different from the flags in that nobody else
251 * ever touches our thread-synchronous status, so we don't
252 * have to worry about atomic accesses.
253 *
254 * Note that there are only 8 bits available.
255 */
256#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
257
258#ifndef __ASSEMBLY__
259#define HAVE_SET_RESTORE_SIGMASK 1
260static inline void set_restore_sigmask(void)
261{
262 struct thread_info *ti = current_thread_info();
263 ti->status |= TS_RESTORE_SIGMASK;
264 set_bit(TIF_SIGPENDING, &ti->flags);
265}
266#endif /* !__ASSEMBLY__ */
267
268#endif /* __KERNEL__ */
269
270#endif /* _ASM_THREAD_INFO_H */