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_32.h (2738B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* include/asm/processor.h
      3 *
      4 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
      5 */
      6
      7#ifndef __ASM_SPARC_PROCESSOR_H
      8#define __ASM_SPARC_PROCESSOR_H
      9
     10#include <asm/psr.h>
     11#include <asm/ptrace.h>
     12#include <asm/head.h>
     13#include <asm/signal.h>
     14#include <asm/page.h>
     15
     16/* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too...
     17 * That one page is used to protect kernel from intruders, so that
     18 * we can make our access_ok test faster
     19 */
     20#define TASK_SIZE	PAGE_OFFSET
     21#ifdef __KERNEL__
     22#define STACK_TOP	(PAGE_OFFSET - PAGE_SIZE)
     23#define STACK_TOP_MAX	STACK_TOP
     24#endif /* __KERNEL__ */
     25
     26struct task_struct;
     27
     28#ifdef __KERNEL__
     29struct fpq {
     30	unsigned long *insn_addr;
     31	unsigned long insn;
     32};
     33#endif
     34
     35/* The Sparc processor specific thread struct. */
     36struct thread_struct {
     37	struct pt_regs *kregs;
     38	unsigned int _pad1;
     39
     40	/* Special child fork kpsr/kwim values. */
     41	unsigned long fork_kpsr __attribute__ ((aligned (8)));
     42	unsigned long fork_kwim;
     43
     44	/* Floating point regs */
     45	unsigned long   float_regs[32] __attribute__ ((aligned (8)));
     46	unsigned long   fsr;
     47	unsigned long   fpqdepth;
     48	struct fpq	fpqueue[16];
     49};
     50
     51#define INIT_THREAD  { \
     52	.kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \
     53}
     54
     55/* Do necessary setup to start up a newly executed thread. */
     56static inline void start_thread(struct pt_regs * regs, unsigned long pc,
     57				    unsigned long sp)
     58{
     59	register unsigned long zero asm("g1");
     60
     61	regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;
     62	regs->pc = ((pc & (~3)) - 4);
     63	regs->npc = regs->pc + 4;
     64	regs->y = 0;
     65	zero = 0;
     66	__asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t"
     67			     "std\t%%g0, [%0 + %3 + 0x08]\n\t"
     68			     "std\t%%g0, [%0 + %3 + 0x10]\n\t"
     69			     "std\t%%g0, [%0 + %3 + 0x18]\n\t"
     70			     "std\t%%g0, [%0 + %3 + 0x20]\n\t"
     71			     "std\t%%g0, [%0 + %3 + 0x28]\n\t"
     72			     "std\t%%g0, [%0 + %3 + 0x30]\n\t"
     73			     "st\t%1, [%0 + %3 + 0x38]\n\t"
     74			     "st\t%%g0, [%0 + %3 + 0x3c]"
     75			     : /* no outputs */
     76			     : "r" (regs),
     77			       "r" (sp - sizeof(struct reg_window32)),
     78			       "r" (zero),
     79			       "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))
     80			     : "memory");
     81}
     82
     83/* Free all resources held by a thread. */
     84#define release_thread(tsk)		do { } while(0)
     85
     86unsigned long __get_wchan(struct task_struct *);
     87
     88#define task_pt_regs(tsk) ((tsk)->thread.kregs)
     89#define KSTK_EIP(tsk)  ((tsk)->thread.kregs->pc)
     90#define KSTK_ESP(tsk)  ((tsk)->thread.kregs->u_regs[UREG_FP])
     91
     92#ifdef __KERNEL__
     93
     94extern struct task_struct *last_task_used_math;
     95int do_mathemu(struct pt_regs *regs, struct task_struct *fpt);
     96
     97#define cpu_relax()	barrier()
     98
     99extern void (*sparc_idle)(void);
    100
    101#endif
    102
    103#endif /* __ASM_SPARC_PROCESSOR_H */