mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 09:46:41 +07:00
cbaa118ecf
Presently most of the 29-bit physical parts do P1/P2 segmentation with a 1:1 cached/uncached mapping, jumping between the two to control the caching behaviour. This provides the basic infrastructure to maintain this behaviour on 32-bit physical parts that don't map P1/P2 at all, using a shiny new linker section and corresponding fixmap entry. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#ifndef __ASM_SH_SYSTEM_64_H
|
|
#define __ASM_SH_SYSTEM_64_H
|
|
|
|
/*
|
|
* include/asm-sh/system_64.h
|
|
*
|
|
* Copyright (C) 2000, 2001 Paolo Alberelli
|
|
* Copyright (C) 2003 Paul Mundt
|
|
* Copyright (C) 2004 Richard Curnow
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <asm/processor.h>
|
|
|
|
/*
|
|
* switch_to() should switch tasks to task nr n, first
|
|
*/
|
|
struct task_struct *sh64_switch_to(struct task_struct *prev,
|
|
struct thread_struct *prev_thread,
|
|
struct task_struct *next,
|
|
struct thread_struct *next_thread);
|
|
|
|
#define switch_to(prev,next,last) \
|
|
do { \
|
|
if (last_task_used_math != next) { \
|
|
struct pt_regs *regs = next->thread.uregs; \
|
|
if (regs) regs->sr |= SR_FD; \
|
|
} \
|
|
last = sh64_switch_to(prev, &prev->thread, next, \
|
|
&next->thread); \
|
|
} while (0)
|
|
|
|
#define __uses_jump_to_uncached
|
|
|
|
#define jump_to_uncached() do { } while (0)
|
|
#define back_to_cached() do { } while (0)
|
|
|
|
#endif /* __ASM_SH_SYSTEM_64_H */
|