system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-07-22 02:37:15 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

riscv: Implement atomic operations

Browse source 
Implement atomic_load_acq_16, atomic_store_rel_16.

These are needed by bhyve(8) PCIe bus emulation code.

Group 16-bit atomic functions similarly to 32 and 64-bit.

Reviewed by:	mhorne
Differential Revision:	https://reviews.freebsd.org/D45228
This commit is contained in:
Ruslan Bukin 2024-05-22 16:07:27 +01:00
parent ddd0d4f4cd
commit 2183004e14
1 changed files with 32 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
sys/riscv/include/atomic.h
View file

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
* Copyright (c) 2015-2024 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by SRI International and the
@ -105,8 +105,6 @@ atomic_fcmpset_rel_##WIDTH(__volatile uint##WIDTH##_t *p, \
ATOMIC_CMPSET_ACQ_REL(8);
ATOMIC_FCMPSET_ACQ_REL(8);
ATOMIC_CMPSET_ACQ_REL(16);
ATOMIC_FCMPSET_ACQ_REL(16);
#define atomic_cmpset_char atomic_cmpset_8
#define atomic_cmpset_acq_char atomic_cmpset_acq_8
@ -116,11 +114,40 @@ ATOMIC_FCMPSET_ACQ_REL(16);
#define atomic_fcmpset_rel_char atomic_fcmpset_rel_8
#define atomic_cmpset_short atomic_cmpset_16
#define atomic_cmpset_acq_short atomic_cmpset_acq_16
#define atomic_cmpset_rel_short atomic_cmpset_rel_16
#define atomic_fcmpset_short atomic_fcmpset_16
ATOMIC_CMPSET_ACQ_REL(16);
ATOMIC_FCMPSET_ACQ_REL(16);
#define atomic_load_acq_16 atomic_load_acq_16
static __inline uint16_t
atomic_load_acq_16(volatile uint16_t *p)
{
uint16_t ret;
ret = *p;
fence();
return (ret);
}
static __inline void
atomic_store_rel_16(volatile uint16_t *p, uint16_t val)
{
fence();
*p = val;
}
#define atomic_cmpset_acq_short atomic_cmpset_acq_16
#define atomic_fcmpset_acq_short atomic_fcmpset_acq_16
#define atomic_load_acq_short atomic_load_acq_16
#define atomic_cmpset_rel_short atomic_cmpset_rel_16
#define atomic_fcmpset_rel_short atomic_fcmpset_rel_16
#define atomic_store_rel_short atomic_store_rel_16
static __inline void
atomic_add_32(volatile uint32_t *p, uint32_t val)