linux_dsm_epyc7002/arch/openrisc/include/asm/bitops.h
Stefan Kristiansson 0e9f9fd20c openrisc: add atomic bitops
This utilize the load-link/store-conditional l.lwa and l.swa
instructions to implement the atomic bitops.
When those instructions are not available emulation is provided.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
[shorne@gmail.com: remove OPENRISC_HAVE_INST_LWA_SWA config suggesed by
Alan Cox https://lkml.org/lkml/2014/7/23/666, implement
test_and_change_bit]
Signed-off-by: Stafford Horne <shorne@gmail.com>
2017-02-25 04:12:38 +09:00

54 lines
1.5 KiB
C

/*
* OpenRISC Linux
*
* Linux architectural port borrowing liberally from similar works of
* others. All original copyrights apply as per the original source
* declaration.
*
* OpenRISC implementation:
* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
* et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __ASM_OPENRISC_BITOPS_H
#define __ASM_OPENRISC_BITOPS_H
/*
* Where we haven't written assembly versions yet, we fall back to the
* generic implementations. Otherwise, we pull in our (hopefully)
* optimized versions.
*/
#include <linux/irqflags.h>
#include <linux/compiler.h>
#include <asm/barrier.h>
#include <asm/bitops/__ffs.h>
#include <asm-generic/bitops/ffz.h>
#include <asm/bitops/fls.h>
#include <asm/bitops/__fls.h>
#include <asm-generic/bitops/fls64.h>
#include <asm-generic/bitops/find.h>
#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif
#include <asm-generic/bitops/sched.h>
#include <asm/bitops/ffs.h>
#include <asm-generic/bitops/hweight.h>
#include <asm-generic/bitops/lock.h>
#include <asm/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>
#include <asm-generic/bitops/le.h>
#include <asm-generic/bitops/ext2-atomic.h>
#endif /* __ASM_GENERIC_BITOPS_H */