Replace __attribute_pure__ with __pure
[linux-2.6.git] / include / asm-blackfin / processor.h
1 #ifndef __ASM_BFIN_PROCESSOR_H
2 #define __ASM_BFIN_PROCESSOR_H
3
4 /*
5  * Default implementation of macro that returns current
6  * instruction pointer ("program counter").
7  */
8 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
9
10 #include <asm/blackfin.h>
11 #include <asm/segment.h>
12 #include <linux/compiler.h>
13
14 static inline unsigned long rdusp(void)
15 {
16         unsigned long usp;
17
18         __asm__ __volatile__("%0 = usp;\n\t":"=da"(usp));
19         return usp;
20 }
21
22 static inline void wrusp(unsigned long usp)
23 {
24         __asm__ __volatile__("usp = %0;\n\t"::"da"(usp));
25 }
26
27 /*
28  * User space process size: 1st byte beyond user address space.
29  */
30 extern unsigned long memory_end;
31 #define TASK_SIZE       (memory_end)
32
33 #define TASK_UNMAPPED_BASE      0
34
35 struct thread_struct {
36         unsigned long ksp;      /* kernel stack pointer */
37         unsigned long usp;      /* user stack pointer */
38         unsigned short seqstat; /* saved status register */
39         unsigned long esp0;     /* points to SR of stack frame pt_regs */
40         unsigned long pc;       /* instruction pointer */
41         void *        debuggerinfo;
42 };
43
44 #define INIT_THREAD  {                                          \
45         sizeof(init_stack) + (unsigned long) init_stack, 0,     \
46         PS_S, 0, 0                                              \
47 }
48
49 /*
50  * Do necessary setup to start up a newly executed thread.
51  *
52  * pass the data segment into user programs if it exists,
53  * it can't hurt anything as far as I can tell
54  */
55 #define start_thread(_regs, _pc, _usp)                                  \
56 do {                                                                    \
57         set_fs(USER_DS);                                                \
58         (_regs)->pc = (_pc);                                            \
59         if (current->mm)                                                \
60                 (_regs)->p5 = current->mm->start_data;                  \
61         task_thread_info(current)->l1_task_info.stack_start             \
62                 = (void *)current->mm->context.stack_start;             \
63         task_thread_info(current)->l1_task_info.lowest_sp = (void *)(_usp); \
64         memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info, \
65                 sizeof(*L1_SCRATCH_TASK_INFO));                         \
66         wrusp(_usp);                                                    \
67 } while(0)
68
69 /* Forward declaration, a strange C thing */
70 struct task_struct;
71
72 /* Free all resources held by a thread. */
73 static inline void release_thread(struct task_struct *dead_task)
74 {
75 }
76
77 #define prepare_to_copy(tsk)    do { } while (0)
78
79 extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
80
81 /*
82  * Free current thread data structures etc..
83  */
84 static inline void exit_thread(void)
85 {
86 }
87
88 /*
89  * Return saved PC of a blocked thread.
90  */
91 #define thread_saved_pc(tsk)    (tsk->thread.pc)
92
93 unsigned long get_wchan(struct task_struct *p);
94
95 #define KSTK_EIP(tsk)                                                   \
96     ({                                                                  \
97         unsigned long eip = 0;                                          \
98         if ((tsk)->thread.esp0 > PAGE_SIZE &&                           \
99             MAP_NR((tsk)->thread.esp0) < max_mapnr)                     \
100               eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc;        \
101         eip; })
102 #define KSTK_ESP(tsk)   ((tsk) == current ? rdusp() : (tsk)->thread.usp)
103
104 #define cpu_relax()     barrier()
105
106 /* Get the Silicon Revision of the chip */
107 static inline uint32_t __pure bfin_revid(void)
108 {
109         /* stored in the upper 4 bits */
110         return bfin_read_CHIPID() >> 28;
111 }
112
113 static inline uint32_t __pure bfin_compiled_revid(void)
114 {
115 #if defined(CONFIG_BF_REV_0_0)
116         return 0;
117 #elif defined(CONFIG_BF_REV_0_1)
118         return 1;
119 #elif defined(CONFIG_BF_REV_0_2)
120         return 2;
121 #elif defined(CONFIG_BF_REV_0_3)
122         return 3;
123 #elif defined(CONFIG_BF_REV_0_4)
124         return 4;
125 #elif defined(CONFIG_BF_REV_0_5)
126         return 5;
127 #elif defined(CONFIG_BF_REV_ANY)
128         return 0xffff;
129 #else
130         return -1;
131 #endif
132 }
133
134 #endif