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target-arm: Add isread parameter to CPAccessFns

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System registers might have access requirements which need to
be described via a CPAccessFn and which differ for reads and
writes. For this to be possible we need to pass the access
function a parameter to tell it whether the access being checked
is a read or a write.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
Message-id: 1454506721-11843-6-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2016-02-11 11:17:31 +00:00
parent 533e93f1cf
commit 3f208fd76b
6 changed files with 68 additions and 37 deletions
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5
target-arm/op_helper.c
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@ -457,7 +457,8 @@ void HELPER(set_user_reg)(CPUARMState *env, uint32_t regno, uint32_t val)
}
}
void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome)
void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome,
uint32_t isread)
{
const ARMCPRegInfo *ri = rip;
int target_el;
@ -471,7 +472,7 @@ void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome)
return;
}
switch (ri->accessfn(env, ri)) {
switch (ri->accessfn(env, ri, isread)) {
case CP_ACCESS_OK:
return;
case CP_ACCESS_TRAP: