/* * OpenRISC Linux * * Linux architectural port borrowing liberally from similar works of * others.  All original copyrights apply as per the original source * declaration. * * OpenRISC implementation: * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> * et al. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef __ASM_OPENRISC_PROCESSOR_H#define __ASM_OPENRISC_PROCESSOR_H #include <asm/spr_defs.h>#include <asm/page.h>#include <asm/ptrace.h> #define STACK_TOP       TASK_SIZE#define STACK_TOP_MAX	STACK_TOP/* Kernel and user SR register setting */#define KERNEL_SR (SPR_SR_DME | SPR_SR_IME | SPR_SR_ICE \		   | SPR_SR_DCE | SPR_SR_SM)#define USER_SR   (SPR_SR_DME | SPR_SR_IME | SPR_SR_ICE \		   | SPR_SR_DCE | SPR_SR_IEE | SPR_SR_TEE)/* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr() ({ __label__ _l; _l: &&_l; }) /* * User space process size. This is hardcoded into a few places, * so don't change it unless you know what you are doing. */ #define TASK_SIZE       (0x80000000UL) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE      (TASK_SIZE / 8 * 3) #ifndef __ASSEMBLY__ struct task_struct; struct thread_struct {}; /* * At user->kernel entry, the pt_regs struct is stacked on the top of the * kernel-stack.  This macro allows us to find those regs for a task. * Notice that subsequent pt_regs stackings, like recursive interrupts * occurring while we're in the kernel, won't affect this - only the first * user->kernel transition registers are reached by this (i.e. not regs * for running signal handler) */#define user_regs(thread_info)  (((struct pt_regs *)((unsigned long)(thread_info) + THREAD_SIZE - STACK_FRAME_OVERHEAD)) - 1) /* * Dito but for the currently running task */ #define task_pt_regs(task) user_regs(task_thread_info(task)) #define INIT_SP         (sizeof(init_stack) + (unsigned long) &init_stack) #define INIT_THREAD  { }  #define KSTK_EIP(tsk)   (task_pt_regs(tsk)->pc)#define KSTK_ESP(tsk)   (task_pt_regs(tsk)->sp)  void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);void release_thread(struct task_struct *);unsigned long get_wchan(struct task_struct *p); #define init_stack      (init_thread_union.stack) #define cpu_relax()     barrier() #endif /* __ASSEMBLY__ */#endif /* __ASM_OPENRISC_PROCESSOR_H */