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diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h
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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
34struct task_struct;
35struct exec_domain;
36
37struct 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 */
143register 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 */