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lm32: take BQL before writing IP/IM register 

Writing to these registers may raise an interrupt request. Actually,
this prevents the milkymist board from starting.

Cc: qemu-stable@nongnu.org
Signed-off-by: Michael Walle <michael@walle.cc>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Michael Walle 2018-01-09 18:01:13 +01:00
parent dfa93a0b6e
commit 81e9cbd0ca
1 changed files with 4 additions and 0 deletions
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4
target/lm32/op_helper.c
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@ -102,12 +102,16 @@ void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
{
qemu_mutex_lock_iothread();
lm32_pic_set_im(env->pic_state, im);
qemu_mutex_unlock_iothread();
}
void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
{
qemu_mutex_lock_iothread();
lm32_pic_set_ip(env->pic_state, im);
qemu_mutex_unlock_iothread();
}
void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)