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| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-04-18 16:37:00 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2019-05-15 10:31:52 -0700 |
| commit | b345e140534ea17814b02bdf8798f18db6295304 (patch) | |
| tree | f9320a22da357d31ad10e17a340300b02a389b98 /target/xtensa/cpu.c | |
| parent | 98736654f3dfbf984d9e26c9be0480b0560c1067 (diff) | |
target/xtensa: implement exclusive access option
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>
Diffstat (limited to 'target/xtensa/cpu.c')
| -rw-r--r-- | target/xtensa/cpu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c index 4215a1881e..54c834228a 100644 --- a/target/xtensa/cpu.c +++ b/target/xtensa/cpu.c @@ -82,6 +82,7 @@ static void xtensa_cpu_reset(CPUState *s) XTENSA_OPTION_ATOMCTL) ? 0x28 : 0x15; env->sregs[CONFIGID0] = env->config->configid[0]; env->sregs[CONFIGID1] = env->config->configid[1]; + env->exclusive_addr = -1; #ifndef CONFIG_USER_ONLY reset_mmu(env); |