18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
28c2ecf20Sopenharmony_ci#ifndef __UM_PROCESSOR_H
38c2ecf20Sopenharmony_ci#define __UM_PROCESSOR_H
48c2ecf20Sopenharmony_ci#include <linux/time-internal.h>
58c2ecf20Sopenharmony_ci
68c2ecf20Sopenharmony_ci/* include faultinfo structure */
78c2ecf20Sopenharmony_ci#include <sysdep/faultinfo.h>
88c2ecf20Sopenharmony_ci
98c2ecf20Sopenharmony_ci#ifdef CONFIG_X86_32
108c2ecf20Sopenharmony_ci# include "processor_32.h"
118c2ecf20Sopenharmony_ci#else
128c2ecf20Sopenharmony_ci# include "processor_64.h"
138c2ecf20Sopenharmony_ci#endif
148c2ecf20Sopenharmony_ci
158c2ecf20Sopenharmony_ci#define KSTK_EIP(tsk) KSTK_REG(tsk, HOST_IP)
168c2ecf20Sopenharmony_ci#define KSTK_ESP(tsk) KSTK_REG(tsk, HOST_SP)
178c2ecf20Sopenharmony_ci#define KSTK_EBP(tsk) KSTK_REG(tsk, HOST_BP)
188c2ecf20Sopenharmony_ci
198c2ecf20Sopenharmony_ci#define ARCH_IS_STACKGROW(address) \
208c2ecf20Sopenharmony_ci       (address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
218c2ecf20Sopenharmony_ci
228c2ecf20Sopenharmony_ci#include <asm/user.h>
238c2ecf20Sopenharmony_ci
248c2ecf20Sopenharmony_ci/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
258c2ecf20Sopenharmony_cistatic __always_inline void rep_nop(void)
268c2ecf20Sopenharmony_ci{
278c2ecf20Sopenharmony_ci	__asm__ __volatile__("rep;nop": : :"memory");
288c2ecf20Sopenharmony_ci}
298c2ecf20Sopenharmony_ci
308c2ecf20Sopenharmony_cistatic __always_inline void cpu_relax(void)
318c2ecf20Sopenharmony_ci{
328c2ecf20Sopenharmony_ci	if (time_travel_mode == TT_MODE_INFCPU ||
338c2ecf20Sopenharmony_ci	    time_travel_mode == TT_MODE_EXTERNAL)
348c2ecf20Sopenharmony_ci		time_travel_ndelay(1);
358c2ecf20Sopenharmony_ci	else
368c2ecf20Sopenharmony_ci		rep_nop();
378c2ecf20Sopenharmony_ci}
388c2ecf20Sopenharmony_ci
398c2ecf20Sopenharmony_ci#define task_pt_regs(t) (&(t)->thread.regs)
408c2ecf20Sopenharmony_ci
418c2ecf20Sopenharmony_ci#include <asm/processor-generic.h>
428c2ecf20Sopenharmony_ci
438c2ecf20Sopenharmony_ci#endif
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