mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-03 21:56:42 +07:00
1c80f22f8d
Disintegrate asm/system.h for MN10300. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-am33-list@redhat.com
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* MN10300 task switching definitions
|
|
*
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
#ifndef _ASM_SWITCH_TO_H
|
|
#define _ASM_SWITCH_TO_H
|
|
|
|
#include <asm/barrier.h>
|
|
|
|
struct task_struct;
|
|
struct thread_struct;
|
|
|
|
#if !defined(CONFIG_LAZY_SAVE_FPU)
|
|
struct fpu_state_struct;
|
|
extern asmlinkage void fpu_save(struct fpu_state_struct *);
|
|
#define switch_fpu(prev, next) \
|
|
do { \
|
|
if ((prev)->thread.fpu_flags & THREAD_HAS_FPU) { \
|
|
(prev)->thread.fpu_flags &= ~THREAD_HAS_FPU; \
|
|
(prev)->thread.uregs->epsw &= ~EPSW_FE; \
|
|
fpu_save(&(prev)->thread.fpu_state); \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
#define switch_fpu(prev, next) do {} while (0)
|
|
#endif
|
|
|
|
/* context switching is now performed out-of-line in switch_to.S */
|
|
extern asmlinkage
|
|
struct task_struct *__switch_to(struct thread_struct *prev,
|
|
struct thread_struct *next,
|
|
struct task_struct *prev_task);
|
|
|
|
#define switch_to(prev, next, last) \
|
|
do { \
|
|
switch_fpu(prev, next); \
|
|
current->thread.wchan = (u_long) __builtin_return_address(0); \
|
|
(last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \
|
|
mb(); \
|
|
current->thread.wchan = 0; \
|
|
} while (0)
|
|
|
|
#endif /* _ASM_SWITCH_TO_H */
|