xref: /OK3568_Linux_fs/kernel/arch/x86/um/asm/processor.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __UM_PROCESSOR_H
3*4882a593Smuzhiyun #define __UM_PROCESSOR_H
4*4882a593Smuzhiyun #include <linux/time-internal.h>
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun /* include faultinfo structure */
7*4882a593Smuzhiyun #include <sysdep/faultinfo.h>
8*4882a593Smuzhiyun 
9*4882a593Smuzhiyun #ifdef CONFIG_X86_32
10*4882a593Smuzhiyun # include "processor_32.h"
11*4882a593Smuzhiyun #else
12*4882a593Smuzhiyun # include "processor_64.h"
13*4882a593Smuzhiyun #endif
14*4882a593Smuzhiyun 
15*4882a593Smuzhiyun #define KSTK_EIP(tsk) KSTK_REG(tsk, HOST_IP)
16*4882a593Smuzhiyun #define KSTK_ESP(tsk) KSTK_REG(tsk, HOST_SP)
17*4882a593Smuzhiyun #define KSTK_EBP(tsk) KSTK_REG(tsk, HOST_BP)
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun #define ARCH_IS_STACKGROW(address) \
20*4882a593Smuzhiyun        (address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
21*4882a593Smuzhiyun 
22*4882a593Smuzhiyun #include <asm/user.h>
23*4882a593Smuzhiyun 
24*4882a593Smuzhiyun /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
rep_nop(void)25*4882a593Smuzhiyun static __always_inline void rep_nop(void)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun 	__asm__ __volatile__("rep;nop": : :"memory");
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun 
cpu_relax(void)30*4882a593Smuzhiyun static __always_inline void cpu_relax(void)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun 	if (time_travel_mode == TT_MODE_INFCPU ||
33*4882a593Smuzhiyun 	    time_travel_mode == TT_MODE_EXTERNAL)
34*4882a593Smuzhiyun 		time_travel_ndelay(1);
35*4882a593Smuzhiyun 	else
36*4882a593Smuzhiyun 		rep_nop();
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun 
39*4882a593Smuzhiyun #define task_pt_regs(t) (&(t)->thread.regs)
40*4882a593Smuzhiyun 
41*4882a593Smuzhiyun #include <asm/processor-generic.h>
42*4882a593Smuzhiyun 
43*4882a593Smuzhiyun #endif
44