motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-07 09:43:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target/xtensa: implement exclusive access option

Browse source 
The Exclusive Instructions provide a general-purpose mechanism for
atomic updates of memory-based synchronization variables that can be
used for exclusion algorithms.

Use cmpxchg-based implementation that is sufficient for the typical use
of exclusive access in atomic operations.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2019-04-18 16:37:00 -07:00
parent 98736654f3
commit b345e14053
7 changed files with 200 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

1
target/xtensa/helper.h
View file

@ -24,6 +24,7 @@ DEF_HELPER_1(check_interrupts, void, env)
DEF_HELPER_2(intset, void, env, i32)
DEF_HELPER_2(intclear, void, env, i32)
DEF_HELPER_3(check_atomctl, void, env, i32, i32)
DEF_HELPER_4(check_exclusive, void, env, i32, i32, i32)
DEF_HELPER_2(wsr_memctl, void, env, i32)
DEF_HELPER_2(itlb_hit_test, void, env, i32)