72 lines
2 KiB
C
72 lines
2 KiB
C
/*
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* include/asm-cris/processor.h
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*
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* Copyright (C) 2000, 2001 Axis Communications AB
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*
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* Authors: Bjorn Wesen Initial version
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*
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*/
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#ifndef __ASM_CRIS_PROCESSOR_H
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#define __ASM_CRIS_PROCESSOR_H
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#include <asm/system.h>
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#include <asm/page.h>
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#include <asm/ptrace.h>
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#include <asm/arch/processor.h>
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struct task_struct;
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
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/* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
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* normally, the stack is found by doing something like p + THREAD_SIZE
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* in CRIS, a page is 8192 bytes, which seems like a sane size
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*/
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#define THREAD_SIZE PAGE_SIZE
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#define KERNEL_STACK_SIZE PAGE_SIZE
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/*
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* At user->kernel entry, the pt_regs struct is stacked on the top of the kernel-stack.
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* This macro allows us to find those regs for a task.
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* Notice that subsequent pt_regs stackings, like recursive interrupts occurring while
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* we're in the kernel, won't affect this - only the first user->kernel transition
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* registers are reached by this.
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*/
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#define user_regs(thread_info) (((struct pt_regs *)((unsigned long)(thread_info) + THREAD_SIZE)) - 1)
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/*
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* Dito but for the currently running task
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*/
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#define task_pt_regs(task) user_regs(task_thread_info(task))
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#define current_regs() task_pt_regs(current)
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static inline void prepare_to_copy(struct task_struct *tsk)
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{
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}
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extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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unsigned long get_wchan(struct task_struct *p);
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#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
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extern unsigned long thread_saved_pc(struct task_struct *tsk);
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/* Free all resources held by a thread. */
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static inline void release_thread(struct task_struct *dead_task)
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{
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/* Nothing needs to be done. */
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}
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#define init_stack (init_thread_union.stack)
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#define cpu_relax() barrier()
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#endif /* __ASM_CRIS_PROCESSOR_H */
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