Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-cris / processor.h
blob623bdf06d91107188d04be52ad254a19903a0760
1 /*
2 * include/asm-cris/processor.h
4 * Copyright (C) 2000, 2001 Axis Communications AB
6 * Authors: Bjorn Wesen Initial version
8 */
10 #ifndef __ASM_CRIS_PROCESSOR_H
11 #define __ASM_CRIS_PROCESSOR_H
13 #include <linux/config.h>
14 #include <asm/system.h>
15 #include <asm/page.h>
16 #include <asm/ptrace.h>
17 #include <asm/arch/processor.h>
19 /* This decides where the kernel will search for a free chunk of vm
20 * space during mmap's.
22 #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
24 /* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
25 * normally, the stack is found by doing something like p + THREAD_SIZE
26 * in CRIS, a page is 8192 bytes, which seems like a sane size
29 #define THREAD_SIZE PAGE_SIZE
30 #define KERNEL_STACK_SIZE PAGE_SIZE
33 * At user->kernel entry, the pt_regs struct is stacked on the top of the kernel-stack.
34 * This macro allows us to find those regs for a task.
35 * Notice that subsequent pt_regs stackings, like recursive interrupts occurring while
36 * we're in the kernel, won't affect this - only the first user->kernel transition
37 * registers are reached by this.
40 #define user_regs(thread_info) (((struct pt_regs *)((unsigned long)(thread_info) + THREAD_SIZE)) - 1)
43 * Dito but for the currently running task
46 #define current_regs() user_regs(current->thread_info)
48 extern inline void prepare_to_copy(struct task_struct *tsk)
52 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
54 unsigned long get_wchan(struct task_struct *p);
56 #define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
59 * Free current thread data structures etc..
62 extern inline void exit_thread(void)
64 /* Nothing needs to be done. */
67 extern unsigned long thread_saved_pc(struct task_struct *tsk);
69 /* Free all resources held by a thread. */
70 extern inline void release_thread(struct task_struct *dead_task)
72 /* Nothing needs to be done. */
75 #define init_stack (init_thread_union.stack)
77 #define cpu_relax() barrier()
79 #endif /* __ASM_CRIS_PROCESSOR_H */