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