/* * 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 */