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Diffstat (limited to 'include/asm-sparc64/thread_info.h')
-rw-r--r-- | include/asm-sparc64/thread_info.h | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h new file mode 100644 index 000000000000..517caaba1c87 --- /dev/null +++ b/include/asm-sparc64/thread_info.h | |||
@@ -0,0 +1,252 @@ | |||
1 | /* $Id: thread_info.h,v 1.1 2002/02/10 00:00:58 davem Exp $ | ||
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_CWP 2 | ||
19 | #define TI_FLAG_CWP_SHIFT 40 | ||
20 | #define TI_FLAG_BYTE_CURRENT_DS 3 | ||
21 | #define TI_FLAG_CURRENT_DS_SHIFT 32 | ||
22 | #define TI_FLAG_BYTE_FPDEPTH 4 | ||
23 | #define TI_FLAG_FPDEPTH_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 | |||
34 | struct task_struct; | ||
35 | struct exec_domain; | ||
36 | |||
37 | struct thread_info { | ||
38 | /* D$ line 1 */ | ||
39 | struct task_struct *task; | ||
40 | unsigned long flags; | ||
41 | __u8 cpu; | ||
42 | __u8 fpsaved[7]; | ||
43 | unsigned long ksp; | ||
44 | |||
45 | /* D$ line 2 */ | ||
46 | unsigned long fault_address; | ||
47 | struct pt_regs *kregs; | ||
48 | struct exec_domain *exec_domain; | ||
49 | int preempt_count; | ||
50 | int __pad; | ||
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 | __u64 __user *user_cntd0; | ||
61 | __u64 __user *user_cntd1; | ||
62 | __u64 kernel_cntd0, kernel_cntd1; | ||
63 | __u64 pcr_reg; | ||
64 | |||
65 | __u64 cee_stuff; | ||
66 | |||
67 | struct restart_block restart_block; | ||
68 | |||
69 | unsigned long fpregs[0] __attribute__ ((aligned(64))); | ||
70 | }; | ||
71 | |||
72 | #endif /* !(__ASSEMBLY__) */ | ||
73 | |||
74 | /* offsets into the thread_info struct for assembly code access */ | ||
75 | #define TI_TASK 0x00000000 | ||
76 | #define TI_FLAGS 0x00000008 | ||
77 | #define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE) | ||
78 | #define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE) | ||
79 | #define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP) | ||
80 | #define TI_CURRENT_DS (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS) | ||
81 | #define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH) | ||
82 | #define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED) | ||
83 | #define TI_CPU 0x00000010 | ||
84 | #define TI_FPSAVED 0x00000011 | ||
85 | #define TI_KSP 0x00000018 | ||
86 | #define TI_FAULT_ADDR 0x00000020 | ||
87 | #define TI_KREGS 0x00000028 | ||
88 | #define TI_EXEC_DOMAIN 0x00000030 | ||
89 | #define TI_PRE_COUNT 0x00000038 | ||
90 | #define TI_UTRAPS 0x00000040 | ||
91 | #define TI_REG_WINDOW 0x00000048 | ||
92 | #define TI_RWIN_SPTRS 0x000003c8 | ||
93 | #define TI_GSR 0x00000400 | ||
94 | #define TI_XFSR 0x00000438 | ||
95 | #define TI_USER_CNTD0 0x00000470 | ||
96 | #define TI_USER_CNTD1 0x00000478 | ||
97 | #define TI_KERN_CNTD0 0x00000480 | ||
98 | #define TI_KERN_CNTD1 0x00000488 | ||
99 | #define TI_PCR 0x00000490 | ||
100 | #define TI_CEE_STUFF 0x00000498 | ||
101 | #define TI_RESTART_BLOCK 0x000004a0 | ||
102 | #define TI_FPREGS 0x00000500 | ||
103 | |||
104 | /* We embed this in the uppermost byte of thread_info->flags */ | ||
105 | #define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */ | ||
106 | #define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */ | ||
107 | #define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */ | ||
108 | #define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */ | ||
109 | #define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */ | ||
110 | |||
111 | #if PAGE_SHIFT == 13 | ||
112 | #define THREAD_SIZE (2*PAGE_SIZE) | ||
113 | #define THREAD_SHIFT (PAGE_SHIFT + 1) | ||
114 | #else /* PAGE_SHIFT == 13 */ | ||
115 | #define THREAD_SIZE PAGE_SIZE | ||
116 | #define THREAD_SHIFT PAGE_SHIFT | ||
117 | #endif /* PAGE_SHIFT == 13 */ | ||
118 | |||
119 | #define PREEMPT_ACTIVE 0x4000000 | ||
120 | |||
121 | /* | ||
122 | * macros/functions for gaining access to the thread information structure | ||
123 | * | ||
124 | * preempt_count needs to be 1 initially, until the scheduler is functional. | ||
125 | */ | ||
126 | #ifndef __ASSEMBLY__ | ||
127 | |||
128 | #define INIT_THREAD_INFO(tsk) \ | ||
129 | { \ | ||
130 | .task = &tsk, \ | ||
131 | .flags = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT, \ | ||
132 | .exec_domain = &default_exec_domain, \ | ||
133 | .preempt_count = 1, \ | ||
134 | .restart_block = { \ | ||
135 | .fn = do_no_restart_syscall, \ | ||
136 | }, \ | ||
137 | } | ||
138 | |||
139 | #define init_thread_info (init_thread_union.thread_info) | ||
140 | #define init_stack (init_thread_union.stack) | ||
141 | |||
142 | /* how to get the thread information struct from C */ | ||
143 | register struct thread_info *current_thread_info_reg asm("g6"); | ||
144 | #define current_thread_info() (current_thread_info_reg) | ||
145 | |||
146 | /* thread information allocation */ | ||
147 | #if PAGE_SHIFT == 13 | ||
148 | #define __THREAD_INFO_ORDER 1 | ||
149 | #else /* PAGE_SHIFT == 13 */ | ||
150 | #define __THREAD_INFO_ORDER 0 | ||
151 | #endif /* PAGE_SHIFT == 13 */ | ||
152 | |||
153 | #ifdef CONFIG_DEBUG_STACK_USAGE | ||
154 | #define alloc_thread_info(tsk) \ | ||
155 | ({ \ | ||
156 | struct thread_info *ret; \ | ||
157 | \ | ||
158 | ret = (struct thread_info *) \ | ||
159 | __get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER); \ | ||
160 | if (ret) \ | ||
161 | memset(ret, 0, PAGE_SIZE<<__THREAD_INFO_ORDER); \ | ||
162 | ret; \ | ||
163 | }) | ||
164 | #else | ||
165 | #define alloc_thread_info(tsk) \ | ||
166 | ((struct thread_info *)__get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER)) | ||
167 | #endif | ||
168 | |||
169 | #define free_thread_info(ti) \ | ||
170 | free_pages((unsigned long)(ti),__THREAD_INFO_ORDER) | ||
171 | |||
172 | #define __thread_flag_byte_ptr(ti) \ | ||
173 | ((unsigned char *)(&((ti)->flags))) | ||
174 | #define __cur_thread_flag_byte_ptr __thread_flag_byte_ptr(current_thread_info()) | ||
175 | |||
176 | #define get_thread_fault_code() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE]) | ||
177 | #define set_thread_fault_code(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val)) | ||
178 | #define get_thread_wstate() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE]) | ||
179 | #define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val)) | ||
180 | #define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP]) | ||
181 | #define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val)) | ||
182 | #define get_thread_current_ds() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS]) | ||
183 | #define set_thread_current_ds(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val)) | ||
184 | #define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH]) | ||
185 | #define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val)) | ||
186 | #define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED]) | ||
187 | #define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val)) | ||
188 | |||
189 | #endif /* !(__ASSEMBLY__) */ | ||
190 | |||
191 | /* | ||
192 | * Thread information flags, only 16 bits are available as we encode | ||
193 | * other values into the upper 6 bytes. | ||
194 | * | ||
195 | * On trap return we need to test several values: | ||
196 | * | ||
197 | * user: need_resched, notify_resume, sigpending, wsaved, perfctr | ||
198 | * kernel: fpdepth | ||
199 | * | ||
200 | * So to check for work in the kernel case we simply load the fpdepth | ||
201 | * byte out of the flags and test it. For the user case we encode the | ||
202 | * lower 3 bytes of flags as follows: | ||
203 | * ---------------------------------------- | ||
204 | * | wsaved | flags byte 1 | flags byte 2 | | ||
205 | * ---------------------------------------- | ||
206 | * This optimizes the user test into: | ||
207 | * ldx [%g6 + TI_FLAGS], REG1 | ||
208 | * sethi %hi(_TIF_USER_WORK_MASK), REG2 | ||
209 | * or REG2, %lo(_TIF_USER_WORK_MASK), REG2 | ||
210 | * andcc REG1, REG2, %g0 | ||
211 | * be,pt no_work_to_do | ||
212 | * nop | ||
213 | */ | ||
214 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | ||
215 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ | ||
216 | #define TIF_SIGPENDING 2 /* signal pending */ | ||
217 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | ||
218 | #define TIF_PERFCTR 4 /* performance counters active */ | ||
219 | #define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */ | ||
220 | #define TIF_NEWSIGNALS 6 /* wants new-style signals */ | ||
221 | #define TIF_32BIT 7 /* 32-bit binary */ | ||
222 | #define TIF_NEWCHILD 8 /* just-spawned child process */ | ||
223 | /* TIF_* value 9 is available */ | ||
224 | #define TIF_POLLING_NRFLAG 10 | ||
225 | #define TIF_SYSCALL_SUCCESS 11 | ||
226 | /* NOTE: Thread flags >= 12 should be ones we have no interest | ||
227 | * in using in assembly, else we can't use the mask as | ||
228 | * an immediate value in instructions such as andcc. | ||
229 | */ | ||
230 | #define TIF_ABI_PENDING 12 | ||
231 | #define TIF_MEMDIE 13 | ||
232 | |||
233 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | ||
234 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) | ||
235 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) | ||
236 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | ||
237 | #define _TIF_PERFCTR (1<<TIF_PERFCTR) | ||
238 | #define _TIF_UNALIGNED (1<<TIF_UNALIGNED) | ||
239 | #define _TIF_NEWSIGNALS (1<<TIF_NEWSIGNALS) | ||
240 | #define _TIF_32BIT (1<<TIF_32BIT) | ||
241 | #define _TIF_NEWCHILD (1<<TIF_NEWCHILD) | ||
242 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | ||
243 | #define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING) | ||
244 | #define _TIF_SYSCALL_SUCCESS (1<<TIF_SYSCALL_SUCCESS) | ||
245 | |||
246 | #define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \ | ||
247 | (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \ | ||
248 | _TIF_NEED_RESCHED | _TIF_PERFCTR)) | ||
249 | |||
250 | #endif /* __KERNEL__ */ | ||
251 | |||
252 | #endif /* _ASM_THREAD_INFO_H */ | ||