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[linux-2.6.git] / include / asm-um / processor-generic.h
1 /* 
2  * Copyright (C) 2000 - 2004 Jeff Dike (jdike@addtoit.com)
3  * Licensed under the GPL
4  */
5
6 #ifndef __UM_PROCESSOR_GENERIC_H
7 #define __UM_PROCESSOR_GENERIC_H
8
9 struct pt_regs;
10
11 struct task_struct;
12
13 #include "linux/config.h"
14 #include "asm/ptrace.h"
15 #include "choose-mode.h"
16
17 struct mm_struct;
18
19 #define cpu_relax()   barrier()
20
21 struct thread_struct {
22         int forking;
23         int nsyscalls;
24         struct pt_regs regs;
25         unsigned long cr2;
26         int err;
27         unsigned long trap_no;
28         void *fault_addr;
29         void *fault_catcher;
30         struct task_struct *prev_sched;
31         unsigned long temp_stack;
32         void *exec_buf;
33         struct arch_thread arch;
34         union {
35 #ifdef CONFIG_MODE_TT
36                 struct {
37                         int extern_pid;
38                         int tracing;
39                         int switch_pipe[2];
40                         int singlestep_syscall;
41                         int vm_seq;
42                 } tt;
43 #endif
44 #ifdef CONFIG_MODE_SKAS
45                 struct {
46                         void *switch_buf;
47                         void *fork_buf;
48                         int mm_count;
49                 } skas;
50 #endif
51         } mode;
52         struct {
53                 int op;
54                 union {
55                         struct {
56                                 int pid;
57                         } fork, exec;
58                         struct {
59                                 int (*proc)(void *);
60                                 void *arg;
61                         } thread;
62                         struct {
63                                 void (*proc)(void *);
64                                 void *arg;
65                         } cb;
66                 } u;
67         } request;
68 };
69
70 #define INIT_THREAD \
71 { \
72         .forking                = 0, \
73         .nsyscalls              = 0, \
74         .regs                   = EMPTY_REGS, \
75         .cr2                    = 0, \
76         .err                    = 0, \
77         .fault_addr             = NULL, \
78         .prev_sched             = NULL, \
79         .temp_stack             = 0, \
80         .exec_buf               = NULL, \
81         .arch                   = INIT_ARCH_THREAD, \
82         .request                = { 0 } \
83 }
84
85 typedef struct {
86         unsigned long seg;
87 } mm_segment_t;
88
89 extern struct task_struct *alloc_task_struct(void);
90
91 extern void release_thread(struct task_struct *);
92 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
93 extern void dump_thread(struct pt_regs *regs, struct user *u);
94 extern void prepare_to_copy(struct task_struct *tsk);
95
96 extern unsigned long thread_saved_pc(struct task_struct *t);
97
98 static inline void mm_copy_segments(struct mm_struct *from_mm,
99                                     struct mm_struct *new_mm)
100 {
101 }
102
103 #define init_stack      (init_thread_union.stack)
104
105 /*
106  * User space process size: 3GB (default).
107  */
108 extern unsigned long task_size;
109
110 #undef TASK_SIZE
111 #define TASK_SIZE       (task_size)
112
113 /* This decides where the kernel will search for a free chunk of vm
114  * space during mmap's.
115  */
116 #define TASK_UNMAPPED_BASE      (0x40000000)
117
118 extern void start_thread(struct pt_regs *regs, unsigned long entry, 
119                          unsigned long stack);
120
121 struct cpuinfo_um {
122         unsigned long loops_per_jiffy;
123         int ipi_pipe[2];
124 };
125
126 extern struct cpuinfo_um boot_cpu_data;
127
128 #define my_cpu_data             cpu_data[smp_processor_id()]
129
130 #ifdef CONFIG_SMP
131 extern struct cpuinfo_um cpu_data[];
132 #define current_cpu_data cpu_data[smp_processor_id()]
133 #else
134 #define cpu_data (&boot_cpu_data)
135 #define current_cpu_data boot_cpu_data
136 #endif
137
138 #define KSTK_EIP(tsk) (PT_REGS_IP(&tsk->thread.regs))
139 #define KSTK_ESP(tsk) (PT_REGS_SP(&tsk->thread.regs))
140 #define get_wchan(p) (0)
141
142 #endif
143
144 /*
145  * Overrides for Emacs so that we follow Linus's tabbing style.
146  * Emacs will notice this stuff at the end of the file and automatically
147  * adjust the settings for this buffer only.  This must remain at the end
148  * of the file.
149  * ---------------------------------------------------------------------------
150  * Local variables:
151  * c-file-style: "linux"
152  * End:
153  */