91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
|
|
* 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 cpu_relax() barrier()
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __ASM_OPENRISC_PROCESSOR_H */
|