tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in...
[linux/fpc-iii.git] / arch / microblaze / include / asm / processor.h
blob497a988d79c2346126de754c5f1fe246d50a7a4c
1 /*
2 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2008-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
11 #ifndef _ASM_MICROBLAZE_PROCESSOR_H
12 #define _ASM_MICROBLAZE_PROCESSOR_H
14 #include <asm/ptrace.h>
15 #include <asm/setup.h>
16 #include <asm/registers.h>
17 #include <asm/entry.h>
18 #include <asm/current.h>
20 # ifndef __ASSEMBLY__
21 /* from kernel/cpu/mb.c */
22 extern const struct seq_operations cpuinfo_op;
24 # define cpu_relax() barrier()
25 # define cpu_relax_lowlatency() cpu_relax()
27 #define task_pt_regs(tsk) \
28 (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
30 /* Do necessary setup to start up a newly executed thread. */
31 void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
33 extern void ret_from_fork(void);
34 extern void ret_from_kernel_thread(void);
36 # endif /* __ASSEMBLY__ */
38 # ifndef CONFIG_MMU
40 * User space process size: memory size
42 * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both
43 * user processes and the kernel is on the same memory region. They
44 * both share the memory space and that is limited by the amount of
45 * physical memory. thus, we set TASK_SIZE == amount of total memory.
47 # define TASK_SIZE (0x81000000 - 0x80000000)
50 * Default implementation of macro that returns current
51 * instruction pointer ("program counter").
53 # define current_text_addr() ({ __label__ _l; _l: &&_l; })
56 * This decides where the kernel will search for a free chunk of vm
57 * space during mmap's. We won't be using it
59 # define TASK_UNMAPPED_BASE 0
61 /* definition in include/linux/sched.h */
62 struct task_struct;
64 /* thread_struct is gone. use thread_info instead. */
65 struct thread_struct { };
66 # define INIT_THREAD { }
68 /* Free all resources held by a thread. */
69 static inline void release_thread(struct task_struct *dead_task)
73 /* Free all resources held by a thread. */
74 static inline void exit_thread(void)
78 extern unsigned long thread_saved_pc(struct task_struct *t);
80 extern unsigned long get_wchan(struct task_struct *p);
82 # define KSTK_EIP(tsk) (0)
83 # define KSTK_ESP(tsk) (0)
85 # else /* CONFIG_MMU */
88 * This is used to define STACK_TOP, and with MMU it must be below
89 * kernel base to select the correct PGD when handling MMU exceptions.
91 # define TASK_SIZE (CONFIG_KERNEL_START)
94 * This decides where the kernel will search for a free chunk of vm
95 * space during mmap's.
97 # define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
99 # define THREAD_KSP 0
101 # ifndef __ASSEMBLY__
104 * Default implementation of macro that returns current
105 * instruction pointer ("program counter").
107 # define current_text_addr() ({ __label__ _l; _l: &&_l; })
109 /* If you change this, you must change the associated assembly-languages
110 * constants defined below, THREAD_*.
112 struct thread_struct {
113 /* kernel stack pointer (must be first field in structure) */
114 unsigned long ksp;
115 unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */
116 void *pgdir; /* root of page-table tree */
117 struct pt_regs *regs; /* Pointer to saved register state */
120 # define INIT_THREAD { \
121 .ksp = sizeof init_stack + (unsigned long)init_stack, \
122 .pgdir = swapper_pg_dir, \
125 /* Free all resources held by a thread. */
126 static inline void release_thread(struct task_struct *dead_task)
130 /* Free current thread data structures etc. */
131 static inline void exit_thread(void)
135 /* Return saved (kernel) PC of a blocked thread. */
136 # define thread_saved_pc(tsk) \
137 ((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)
139 unsigned long get_wchan(struct task_struct *p);
141 /* The size allocated for kernel stacks. This _must_ be a power of two! */
142 # define KERNEL_STACK_SIZE 0x2000
144 /* Return some info about the user process TASK. */
145 # define task_tos(task) ((unsigned long)(task) + KERNEL_STACK_SIZE)
146 # define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
148 # define task_pt_regs_plus_args(tsk) \
149 ((void *)task_pt_regs(tsk))
151 # define task_sp(task) (task_regs(task)->r1)
152 # define task_pc(task) (task_regs(task)->pc)
153 /* Grotty old names for some. */
154 # define KSTK_EIP(task) (task_pc(task))
155 # define KSTK_ESP(task) (task_sp(task))
157 /* FIXME */
158 # define deactivate_mm(tsk, mm) do { } while (0)
160 # define STACK_TOP TASK_SIZE
161 # define STACK_TOP_MAX STACK_TOP
163 #ifdef CONFIG_DEBUG_FS
164 extern struct dentry *of_debugfs_root;
165 #endif
167 # endif /* __ASSEMBLY__ */
168 # endif /* CONFIG_MMU */
169 #endif /* _ASM_MICROBLAZE_PROCESSOR_H */