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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * thread_info.h: sparc low-level thread information
4 * adapted from the ppc version by Pete Zaitcev, which was
5 * adapted from the i386 version by Paul Mackerras
6 *
7 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
8 * Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com)
9 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
10 */
11
12#ifndef _ASM_THREAD_INFO_H
13#define _ASM_THREAD_INFO_H
14
15#ifdef __KERNEL__
16
17#ifndef __ASSEMBLY__
18
19#include <asm/ptrace.h>
20#include <asm/page.h>
21
22/*
23 * Low level task data.
24 *
25 * If you change this, change the TI_* offsets below to match.
26 */
27#define NSWINS 8
28struct thread_info {
29 unsigned long uwinmask;
30 struct task_struct *task; /* main task structure */
31 unsigned long flags; /* low level flags */
32 int cpu; /* cpu we're on */
33 int preempt_count; /* 0 => preemptable,
34 <0 => BUG */
35 int softirq_count;
36 int hardirq_count;
37
38 u32 __unused;
39
40 /* Context switch saved kernel state. */
41 unsigned long ksp; /* ... ksp __attribute__ ((aligned (8))); */
42 unsigned long kpc;
43 unsigned long kpsr;
44 unsigned long kwim;
45
46 /* A place to store user windows and stack pointers
47 * when the stack needs inspection.
48 */
49 struct reg_window32 reg_window[NSWINS]; /* align for ldd! */
50 unsigned long rwbuf_stkptrs[NSWINS];
51 unsigned long w_saved;
52};
53
54/*
55 * macros/functions for gaining access to the thread information structure
56 */
57#define INIT_THREAD_INFO(tsk) \
58{ \
59 .uwinmask = 0, \
60 .task = &tsk, \
61 .flags = 0, \
62 .cpu = 0, \
63 .preempt_count = INIT_PREEMPT_COUNT, \
64}
65
66/* how to get the thread information struct from C */
67register struct thread_info *current_thread_info_reg asm("g6");
68#define current_thread_info() (current_thread_info_reg)
69
70/*
71 * thread information allocation
72 */
73#define THREAD_SIZE_ORDER 1
74
75#endif /* __ASSEMBLY__ */
76
77/* Size of kernel stack for each process */
78#define THREAD_SIZE (2 * PAGE_SIZE)
79
80/*
81 * Offsets in thread_info structure, used in assembly code
82 * The "#define REGWIN_SZ 0x40" was abolished, so no multiplications.
83 */
84#define TI_UWINMASK 0x00 /* uwinmask */
85#define TI_TASK 0x04
86#define TI_FLAGS 0x08
87#define TI_CPU 0x0c
88#define TI_PREEMPT 0x10 /* preempt_count */
89#define TI_SOFTIRQ 0x14 /* softirq_count */
90#define TI_HARDIRQ 0x18 /* hardirq_count */
91#define TI_KSP 0x20 /* ksp */
92#define TI_KPC 0x24 /* kpc (ldd'ed with kpc) */
93#define TI_KPSR 0x28 /* kpsr */
94#define TI_KWIM 0x2c /* kwim (ldd'ed with kpsr) */
95#define TI_REG_WINDOW 0x30
96#define TI_RWIN_SPTRS 0x230
97#define TI_W_SAVED 0x250
98
99/*
100 * thread information flag bit numbers
101 */
102#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
103#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
104#define TIF_SIGPENDING 2 /* signal pending */
105#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
106#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
107#define TIF_USEDFPU 8 /* FPU was used by this task
108 * this quantum (SMP) */
109#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling
110 * TIF_NEED_RESCHED */
111#define TIF_MEMDIE 10 /* is terminating due to OOM killer */
112
113/* as above, but as bit values */
114#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
115#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
116#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
117#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
118#define _TIF_USEDFPU (1<<TIF_USEDFPU)
119#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
120
121#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
122 _TIF_SIGPENDING)
123
124#define is_32bit_task() (1)
125
126#endif /* __KERNEL__ */
127
128#endif /* _ASM_THREAD_INFO_H */
1/*
2 * thread_info.h: sparc low-level thread information
3 * adapted from the ppc version by Pete Zaitcev, which was
4 * adapted from the i386 version by Paul Mackerras
5 *
6 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
7 * Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com)
8 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
9 */
10
11#ifndef _ASM_THREAD_INFO_H
12#define _ASM_THREAD_INFO_H
13
14#ifdef __KERNEL__
15
16#ifndef __ASSEMBLY__
17
18#include <asm/btfixup.h>
19#include <asm/ptrace.h>
20#include <asm/page.h>
21
22/*
23 * Low level task data.
24 *
25 * If you change this, change the TI_* offsets below to match.
26 */
27#define NSWINS 8
28struct thread_info {
29 unsigned long uwinmask;
30 struct task_struct *task; /* main task structure */
31 struct exec_domain *exec_domain; /* execution domain */
32 unsigned long flags; /* low level flags */
33 int cpu; /* cpu we're on */
34 int preempt_count; /* 0 => preemptable,
35 <0 => BUG */
36 int softirq_count;
37 int hardirq_count;
38
39 /* Context switch saved kernel state. */
40 unsigned long ksp; /* ... ksp __attribute__ ((aligned (8))); */
41 unsigned long kpc;
42 unsigned long kpsr;
43 unsigned long kwim;
44
45 /* A place to store user windows and stack pointers
46 * when the stack needs inspection.
47 */
48 struct reg_window32 reg_window[NSWINS]; /* align for ldd! */
49 unsigned long rwbuf_stkptrs[NSWINS];
50 unsigned long w_saved;
51
52 struct restart_block restart_block;
53};
54
55/*
56 * macros/functions for gaining access to the thread information structure
57 */
58#define INIT_THREAD_INFO(tsk) \
59{ \
60 .uwinmask = 0, \
61 .task = &tsk, \
62 .exec_domain = &default_exec_domain, \
63 .flags = 0, \
64 .cpu = 0, \
65 .preempt_count = INIT_PREEMPT_COUNT, \
66 .restart_block = { \
67 .fn = do_no_restart_syscall, \
68 }, \
69}
70
71#define init_thread_info (init_thread_union.thread_info)
72#define init_stack (init_thread_union.stack)
73
74/* how to get the thread information struct from C */
75register struct thread_info *current_thread_info_reg asm("g6");
76#define current_thread_info() (current_thread_info_reg)
77
78/*
79 * thread information allocation
80 */
81#define THREAD_INFO_ORDER 1
82
83#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
84
85BTFIXUPDEF_CALL(struct thread_info *, alloc_thread_info_node, int)
86#define alloc_thread_info_node(tsk, node) BTFIXUP_CALL(alloc_thread_info_node)(node)
87
88BTFIXUPDEF_CALL(void, free_thread_info, struct thread_info *)
89#define free_thread_info(ti) BTFIXUP_CALL(free_thread_info)(ti)
90
91#endif /* __ASSEMBLY__ */
92
93/*
94 * Size of kernel stack for each process.
95 * Observe the order of get_free_pages() in alloc_thread_info_node().
96 * The sun4 has 8K stack too, because it's short on memory, and 16K is a waste.
97 */
98#define THREAD_SIZE 8192
99
100/*
101 * Offsets in thread_info structure, used in assembly code
102 * The "#define REGWIN_SZ 0x40" was abolished, so no multiplications.
103 */
104#define TI_UWINMASK 0x00 /* uwinmask */
105#define TI_TASK 0x04
106#define TI_EXECDOMAIN 0x08 /* exec_domain */
107#define TI_FLAGS 0x0c
108#define TI_CPU 0x10
109#define TI_PREEMPT 0x14 /* preempt_count */
110#define TI_SOFTIRQ 0x18 /* softirq_count */
111#define TI_HARDIRQ 0x1c /* hardirq_count */
112#define TI_KSP 0x20 /* ksp */
113#define TI_KPC 0x24 /* kpc (ldd'ed with kpc) */
114#define TI_KPSR 0x28 /* kpsr */
115#define TI_KWIM 0x2c /* kwim (ldd'ed with kpsr) */
116#define TI_REG_WINDOW 0x30
117#define TI_RWIN_SPTRS 0x230
118#define TI_W_SAVED 0x250
119/* #define TI_RESTART_BLOCK 0x25n */ /* Nobody cares */
120
121#define PREEMPT_ACTIVE 0x4000000
122
123/*
124 * thread information flag bit numbers
125 */
126#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
127#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
128#define TIF_SIGPENDING 2 /* signal pending */
129#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
130#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
131#define TIF_USEDFPU 8 /* FPU was used by this task
132 * this quantum (SMP) */
133#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling
134 * TIF_NEED_RESCHED */
135#define TIF_MEMDIE 10 /* is terminating due to OOM killer */
136#define TIF_FREEZE 11 /* is freezing for suspend */
137
138/* as above, but as bit values */
139#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
140#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
141#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
142#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
143#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
144#define _TIF_USEDFPU (1<<TIF_USEDFPU)
145#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
146
147#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
148 _TIF_SIGPENDING | \
149 _TIF_RESTORE_SIGMASK)
150#define _TIF_FREEZE (1<<TIF_FREEZE)
151
152#endif /* __KERNEL__ */
153
154#endif /* _ASM_THREAD_INFO_H */