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 (2693B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
      4 * Copyright (C) 2008-2009 PetaLogix
      5 * Copyright (C) 2006 Atmark Techno, Inc.
      6 */
      7
      8#ifndef _ASM_MICROBLAZE_PROCESSOR_H
      9#define _ASM_MICROBLAZE_PROCESSOR_H
     10
     11#include <asm/ptrace.h>
     12#include <asm/setup.h>
     13#include <asm/registers.h>
     14#include <asm/entry.h>
     15#include <asm/current.h>
     16
     17# ifndef __ASSEMBLY__
     18/* from kernel/cpu/mb.c */
     19extern const struct seq_operations cpuinfo_op;
     20
     21# define cpu_relax()		barrier()
     22
     23#define task_pt_regs(tsk) \
     24		(((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
     25
     26/* Do necessary setup to start up a newly executed thread. */
     27void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
     28
     29extern void ret_from_fork(void);
     30extern void ret_from_kernel_thread(void);
     31
     32# endif /* __ASSEMBLY__ */
     33
     34/*
     35 * This is used to define STACK_TOP, and with MMU it must be below
     36 * kernel base to select the correct PGD when handling MMU exceptions.
     37 */
     38# define TASK_SIZE	(CONFIG_KERNEL_START)
     39
     40/*
     41 * This decides where the kernel will search for a free chunk of vm
     42 * space during mmap's.
     43 */
     44# define TASK_UNMAPPED_BASE	(TASK_SIZE / 8 * 3)
     45
     46# define THREAD_KSP	0
     47
     48#  ifndef __ASSEMBLY__
     49
     50/* If you change this, you must change the associated assembly-languages
     51 * constants defined below, THREAD_*.
     52 */
     53struct thread_struct {
     54	/* kernel stack pointer (must be first field in structure) */
     55	unsigned long	ksp;
     56	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */
     57	void		*pgdir;		/* root of page-table tree */
     58	struct pt_regs	*regs;		/* Pointer to saved register state */
     59};
     60
     61#  define INIT_THREAD { \
     62	.ksp   = sizeof init_stack + (unsigned long)init_stack, \
     63	.pgdir = swapper_pg_dir, \
     64}
     65
     66/* Free all resources held by a thread. */
     67static inline void release_thread(struct task_struct *dead_task)
     68{
     69}
     70
     71unsigned long __get_wchan(struct task_struct *p);
     72
     73/* The size allocated for kernel stacks. This _must_ be a power of two! */
     74# define KERNEL_STACK_SIZE	0x2000
     75
     76/* Return some info about the user process TASK.  */
     77#  define task_tos(task)	((unsigned long)(task) + KERNEL_STACK_SIZE)
     78#  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
     79
     80#  define task_pt_regs_plus_args(tsk) \
     81	((void *)task_pt_regs(tsk))
     82
     83#  define task_sp(task)	(task_regs(task)->r1)
     84#  define task_pc(task)	(task_regs(task)->pc)
     85/* Grotty old names for some.  */
     86#  define KSTK_EIP(task)	(task_pc(task))
     87#  define KSTK_ESP(task)	(task_sp(task))
     88
     89#  define STACK_TOP	TASK_SIZE
     90#  define STACK_TOP_MAX	STACK_TOP
     91
     92#ifdef CONFIG_DEBUG_FS
     93extern struct dentry *of_debugfs_root;
     94#endif
     95
     96#  endif /* __ASSEMBLY__ */
     97#endif /* _ASM_MICROBLAZE_PROCESSOR_H */