cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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processor.h (2339B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * OpenRISC Linux
      4 *
      5 * Linux architectural port borrowing liberally from similar works of
      6 * others.  All original copyrights apply as per the original source
      7 * declaration.
      8 *
      9 * OpenRISC implementation:
     10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
     11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
     12 * et al.
     13 */
     14
     15#ifndef __ASM_OPENRISC_PROCESSOR_H
     16#define __ASM_OPENRISC_PROCESSOR_H
     17
     18#include <asm/spr_defs.h>
     19#include <asm/page.h>
     20#include <asm/ptrace.h>
     21
     22#define STACK_TOP       TASK_SIZE
     23#define STACK_TOP_MAX	STACK_TOP
     24/* Kernel and user SR register setting */
     25#define KERNEL_SR (SPR_SR_DME | SPR_SR_IME | SPR_SR_ICE \
     26		   | SPR_SR_DCE | SPR_SR_SM)
     27#define USER_SR   (SPR_SR_DME | SPR_SR_IME | SPR_SR_ICE \
     28		   | SPR_SR_DCE | SPR_SR_IEE | SPR_SR_TEE)
     29
     30/*
     31 * User space process size. This is hardcoded into a few places,
     32 * so don't change it unless you know what you are doing.
     33 */
     34
     35#define TASK_SIZE       (0x80000000UL)
     36
     37/* This decides where the kernel will search for a free chunk of vm
     38 * space during mmap's.
     39 */
     40#define TASK_UNMAPPED_BASE      (TASK_SIZE / 8 * 3)
     41
     42#ifndef __ASSEMBLY__
     43
     44struct task_struct;
     45
     46struct thread_struct {
     47};
     48
     49/*
     50 * At user->kernel entry, the pt_regs struct is stacked on the top of the
     51 * kernel-stack.  This macro allows us to find those regs for a task.
     52 * Notice that subsequent pt_regs stackings, like recursive interrupts
     53 * occurring while we're in the kernel, won't affect this - only the first
     54 * user->kernel transition registers are reached by this (i.e. not regs
     55 * for running signal handler)
     56 */
     57#define user_regs(thread_info)  (((struct pt_regs *)((unsigned long)(thread_info) + THREAD_SIZE - STACK_FRAME_OVERHEAD)) - 1)
     58
     59/*
     60 * Dito but for the currently running task
     61 */
     62
     63#define task_pt_regs(task) user_regs(task_thread_info(task))
     64
     65#define INIT_SP         (sizeof(init_stack) + (unsigned long) &init_stack)
     66
     67#define INIT_THREAD  { }
     68
     69
     70#define KSTK_EIP(tsk)   (task_pt_regs(tsk)->pc)
     71#define KSTK_ESP(tsk)   (task_pt_regs(tsk)->sp)
     72
     73
     74void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
     75void release_thread(struct task_struct *);
     76unsigned long __get_wchan(struct task_struct *p);
     77
     78#define cpu_relax()     barrier()
     79
     80#endif /* __ASSEMBLY__ */
     81#endif /* __ASM_OPENRISC_PROCESSOR_H */