]> git.openfabrics.org - ~shefty/rdma-dev.git/blob - arch/arm/include/asm/processor.h
sys_poll: fix incorrect type for 'timeout' parameter
[~shefty/rdma-dev.git] / arch / arm / include / asm / processor.h
1 /*
2  *  arch/arm/include/asm/processor.h
3  *
4  *  Copyright (C) 1995-1999 Russell King
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #ifndef __ASM_ARM_PROCESSOR_H
12 #define __ASM_ARM_PROCESSOR_H
13
14 /*
15  * Default implementation of macro that returns current
16  * instruction pointer ("program counter").
17  */
18 #define current_text_addr() ({ __label__ _l; _l: &&_l;})
19
20 #ifdef __KERNEL__
21
22 #include <asm/hw_breakpoint.h>
23 #include <asm/ptrace.h>
24 #include <asm/types.h>
25
26 #ifdef __KERNEL__
27 #define STACK_TOP       ((current->personality & ADDR_LIMIT_32BIT) ? \
28                          TASK_SIZE : TASK_SIZE_26)
29 #define STACK_TOP_MAX   TASK_SIZE
30 #endif
31
32 struct debug_info {
33 #ifdef CONFIG_HAVE_HW_BREAKPOINT
34         struct perf_event       *hbp[ARM_MAX_HBP_SLOTS];
35 #endif
36 };
37
38 struct thread_struct {
39                                                         /* fault info     */
40         unsigned long           address;
41         unsigned long           trap_no;
42         unsigned long           error_code;
43                                                         /* debugging      */
44         struct debug_info       debug;
45 };
46
47 #define INIT_THREAD  {  }
48
49 #ifdef CONFIG_MMU
50 #define nommu_start_thread(regs) do { } while (0)
51 #else
52 #define nommu_start_thread(regs) regs->ARM_r10 = current->mm->start_data
53 #endif
54
55 #define start_thread(regs,pc,sp)                                        \
56 ({                                                                      \
57         unsigned long *stack = (unsigned long *)sp;                     \
58         set_fs(USER_DS);                                                \
59         memset(regs->uregs, 0, sizeof(regs->uregs));                    \
60         if (current->personality & ADDR_LIMIT_32BIT)                    \
61                 regs->ARM_cpsr = USR_MODE;                              \
62         else                                                            \
63                 regs->ARM_cpsr = USR26_MODE;                            \
64         if (elf_hwcap & HWCAP_THUMB && pc & 1)                          \
65                 regs->ARM_cpsr |= PSR_T_BIT;                            \
66         regs->ARM_cpsr |= PSR_ENDSTATE;                                 \
67         regs->ARM_pc = pc & ~1;         /* pc */                        \
68         regs->ARM_sp = sp;              /* sp */                        \
69         regs->ARM_r2 = stack[2];        /* r2 (envp) */                 \
70         regs->ARM_r1 = stack[1];        /* r1 (argv) */                 \
71         regs->ARM_r0 = stack[0];        /* r0 (argc) */                 \
72         nommu_start_thread(regs);                                       \
73 })
74
75 /* Forward declaration, a strange C thing */
76 struct task_struct;
77
78 /* Free all resources held by a thread. */
79 extern void release_thread(struct task_struct *);
80
81 /* Prepare to copy thread state - unlazy all lazy status */
82 #define prepare_to_copy(tsk)    do { } while (0)
83
84 unsigned long get_wchan(struct task_struct *p);
85
86 #if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327)
87 #define cpu_relax()                     smp_mb()
88 #else
89 #define cpu_relax()                     barrier()
90 #endif
91
92 /*
93  * Create a new kernel thread
94  */
95 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
96
97 #define task_pt_regs(p) \
98         ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
99
100 #define KSTK_EIP(tsk)   task_pt_regs(tsk)->ARM_pc
101 #define KSTK_ESP(tsk)   task_pt_regs(tsk)->ARM_sp
102
103 /*
104  * Prefetching support - only ARMv5.
105  */
106 #if __LINUX_ARM_ARCH__ >= 5
107
108 #define ARCH_HAS_PREFETCH
109 static inline void prefetch(const void *ptr)
110 {
111         __asm__ __volatile__(
112                 "pld\t%a0"
113                 :
114                 : "p" (ptr)
115                 : "cc");
116 }
117
118 #define ARCH_HAS_PREFETCHW
119 #define prefetchw(ptr)  prefetch(ptr)
120
121 #define ARCH_HAS_SPINLOCK_PREFETCH
122 #define spin_lock_prefetch(x) do { } while (0)
123
124 #endif
125
126 #define HAVE_ARCH_PICK_MMAP_LAYOUT
127
128 #endif
129
130 #endif /* __ASM_ARM_PROCESSOR_H */