| /* | |
| * 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__ | |
| /* | |
| * Default implementation of macro that returns current | |
| * instruction pointer ("program counter"). | |
| */ | |
| #define current_text_addr() ({ __label__ _l; _l: &&_l; }) | |
| # 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) | |
| { | |
| } | |
| /* Return saved PC of a blocked thread. */ | |
| #define thread_saved_pc(tsk) ((tsk)->thread.kregs->ea) | |
| 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() | |
| #define cpu_relax_lowlatency() cpu_relax() | |
| #endif /* __ASSEMBLY__ */ | |
| #endif /* _ASM_NIOS2_PROCESSOR_H */ |