LXR linux/arch/x86/um/asm/processor.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __UM_PROCESSOR_H
   3#define __UM_PROCESSOR_H
   4#include <linux/time-internal.h>
   5
   6/* include faultinfo structure */
   7#include <sysdep/faultinfo.h>
   8
   9#ifdef CONFIG_X86_32
  10# include "processor_32.h"
  11#else
  12# include "processor_64.h"
  13#endif
  14
  15#define KSTK_EIP(tsk) KSTK_REG(tsk, HOST_IP)
  16#define KSTK_ESP(tsk) KSTK_REG(tsk, HOST_SP)
  17#define KSTK_EBP(tsk) KSTK_REG(tsk, HOST_BP)
  18
  19#define ARCH_IS_STACKGROW(address) \
  20       (address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
  21
  22#include <asm/user.h>
  23
  24/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
  25static __always_inline void rep_nop(void)
  26{
  27        __asm__ __volatile__("rep;nop": : :"memory");
  28}
  29
  30static __always_inline void cpu_relax(void)
  31{
  32        if (time_travel_mode == TT_MODE_INFCPU ||
  33            time_travel_mode == TT_MODE_EXTERNAL)
  34                time_travel_ndelay(1);
  35        else
  36                rep_nop();
  37}
  38
  39#define task_pt_regs(t) (&(t)->thread.regs)
  40
  41#include <asm/processor-generic.h>
  42
  43#endif
  44