101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
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/*
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* Copyright (C) 2013 Altera Corporation
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* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
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* Copyright (C) 2004 Microtronix Datacom Ltd
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* Copyright (C) 2001 Ken Hill (khill@microtronix.com)
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* Vic Phillips (vic@microtronix.com)
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*
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* based on SPARC asm/processor_32.h which is:
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*
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* Copyright (C) 1994 David S. Miller
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_NIOS2_PROCESSOR_H
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#define _ASM_NIOS2_PROCESSOR_H
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#include <asm/ptrace.h>
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#include <asm/registers.h>
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#include <asm/page.h>
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#define NIOS2_FLAG_KTHREAD 0x00000001 /* task is a kernel thread */
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#define NIOS2_OP_NOP 0x1883a
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#define NIOS2_OP_BREAK 0x3da03a
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#ifdef __KERNEL__
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX STACK_TOP
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#endif /* __KERNEL__ */
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/* Kuser helpers is mapped to this user space address */
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#define KUSER_BASE 0x1000
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#define KUSER_SIZE (PAGE_SIZE)
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#ifndef __ASSEMBLY__
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l; })
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# define TASK_SIZE 0x7FFF0000UL
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# define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
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/* The Nios processor specific thread struct. */
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struct thread_struct {
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struct pt_regs *kregs;
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/* Context switch saved kernel state. */
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unsigned long ksp;
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unsigned long kpsr;
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};
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#define INIT_MMAP \
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{ &init_mm, (0), (0), __pgprot(0x0), VM_READ | VM_WRITE | VM_EXEC }
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# define INIT_THREAD { \
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.kregs = NULL, \
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.ksp = 0, \
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.kpsr = 0, \
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}
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extern void start_thread(struct pt_regs *regs, unsigned long pc,
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unsigned long sp);
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struct task_struct;
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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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}
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/* Free current thread data structures etc.. */
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static inline void exit_thread(void)
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{
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}
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/* Return saved PC of a blocked thread. */
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#define thread_saved_pc(tsk) ((tsk)->thread.kregs->ea)
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extern unsigned long get_wchan(struct task_struct *p);
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#define task_pt_regs(p) \
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((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
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/* Used by procfs */
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#define KSTK_EIP(tsk) ((tsk)->thread.kregs->ea)
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#define KSTK_ESP(tsk) ((tsk)->thread.kregs->sp)
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#define cpu_relax() barrier()
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#define cpu_relax_lowlatency() cpu_relax()
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_NIOS2_PROCESSOR_H */
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