1/* 2 * Copyright (C) 2013 Altera Corporation 3 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> 4 * Copyright (C) 2004 Microtronix Datacom Ltd 5 * Copyright (C) 2001 Ken Hill (khill@microtronix.com) 6 * Vic Phillips (vic@microtronix.com) 7 * 8 * based on SPARC asm/processor_32.h which is: 9 * 10 * Copyright (C) 1994 David S. Miller 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file "COPYING" in the main directory of this archive 14 * for more details. 15 */ 16 17#ifndef _ASM_NIOS2_PROCESSOR_H 18#define _ASM_NIOS2_PROCESSOR_H 19 20#include <asm/ptrace.h> 21#include <asm/registers.h> 22#include <asm/page.h> 23 24#define NIOS2_FLAG_KTHREAD 0x00000001 /* task is a kernel thread */ 25 26#define NIOS2_OP_NOP 0x1883a 27#define NIOS2_OP_BREAK 0x3da03a 28 29#ifdef __KERNEL__ 30 31#define STACK_TOP TASK_SIZE 32#define STACK_TOP_MAX STACK_TOP 33 34#endif /* __KERNEL__ */ 35 36/* Kuser helpers is mapped to this user space address */ 37#define KUSER_BASE 0x1000 38#define KUSER_SIZE (PAGE_SIZE) 39#ifndef __ASSEMBLY__ 40 41# define TASK_SIZE 0x7FFF0000UL 42# define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) 43 44/* The Nios processor specific thread struct. */ 45struct thread_struct { 46 struct pt_regs *kregs; 47 48 /* Context switch saved kernel state. */ 49 unsigned long ksp; 50 unsigned long kpsr; 51}; 52 53# define INIT_THREAD { \ 54 .kregs = NULL, \ 55 .ksp = 0, \ 56 .kpsr = 0, \ 57} 58 59extern void start_thread(struct pt_regs *regs, unsigned long pc, 60 unsigned long sp); 61 62struct task_struct; 63 64extern unsigned long __get_wchan(struct task_struct *p); 65 66#define task_pt_regs(p) \ 67 ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1) 68 69/* Used by procfs */ 70#define KSTK_EIP(tsk) ((tsk)->thread.kregs->ea) 71#define KSTK_ESP(tsk) ((tsk)->thread.kregs->sp) 72 73#define cpu_relax() barrier() 74 75#endif /* __ASSEMBLY__ */ 76 77#endif /* _ASM_NIOS2_PROCESSOR_H */ 78