| /* |
| * 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 */ |
