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f5e706ad SR |
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 | ||
33 | struct task_struct; | |
34 | struct exec_domain; | |
35 | ||
36 | struct 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 | ||
f5e706ad SR |
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 | |
c7d5a005 DM |
94 | #define TI_RESTART_BLOCK 0x00000470 |
95 | #define TI_KUNA_REGS 0x000004a0 | |
96 | #define TI_KUNA_INSN 0x000004a8 | |
97 | #define TI_FPREGS 0x000004c0 | |
f5e706ad SR |
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 | ||
6c94b1ee | 114 | #define PREEMPT_ACTIVE 0x10000000 |
f5e706ad SR |
115 | |
116 | /* | |
117 | * macros/functions for gaining access to the thread information structure | |
f5e706ad SR |
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, \ | |
c99e6efe | 126 | .preempt_count = INIT_PREEMPT_COUNT, \ |
f5e706ad SR |
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 */ | |
136 | register 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 | ||
b69c49b7 FT |
146 | #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR |
147 | ||
f5e706ad SR |
148 | #ifdef CONFIG_DEBUG_STACK_USAGE |
149 | #define alloc_thread_info(tsk) \ | |
150 | ({ \ | |
151 | struct thread_info *ret; \ | |
152 | \ | |
153 | ret = (struct thread_info *) \ | |
154 | __get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER); \ | |
155 | if (ret) \ | |
156 | memset(ret, 0, PAGE_SIZE<<__THREAD_INFO_ORDER); \ | |
157 | ret; \ | |
158 | }) | |
159 | #else | |
160 | #define alloc_thread_info(tsk) \ | |
161 | ((struct thread_info *)__get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER)) | |
162 | #endif | |
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 | * | |
c7d5a005 | 192 | * user: need_resched, notify_resume, sigpending, wsaved |
f5e706ad SR |
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 */ | |
e35a8925 | 210 | #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ |
f5e706ad SR |
211 | #define TIF_SIGPENDING 2 /* signal pending */ |
212 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
c7d5a005 | 213 | /* flag bit 4 is available */ |
f5e706ad SR |
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 */ | |
c658ad1b | 220 | #define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */ |
f5e706ad SR |
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 | */ | |
94673e96 | 225 | /* flag bit 12 is available */ |
0ddc9324 | 226 | #define TIF_MEMDIE 13 /* is terminating due to OOM killer */ |
f5e706ad | 227 | #define TIF_POLLING_NRFLAG 14 |
83224b08 | 228 | #define TIF_FREEZE 15 /* is freezing for suspend */ |
f5e706ad SR |
229 | |
230 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
e35a8925 | 231 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
f5e706ad SR |
232 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
233 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
f5e706ad SR |
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) | |
c658ad1b | 238 | #define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) |
f5e706ad | 239 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
83224b08 | 240 | #define _TIF_FREEZE (1<<TIF_FREEZE) |
f5e706ad SR |
241 | |
242 | #define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \ | |
e35a8925 | 243 | _TIF_DO_NOTIFY_RESUME_MASK | \ |
c7d5a005 | 244 | _TIF_NEED_RESCHED) |
e35a8925 | 245 | #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING) |
f5e706ad SR |
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 | |
260 | static 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 */ |