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target-arm: Implement AArch64 dummy MDSCR_EL1

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We don't support letting the guest do debug, but Linux prods the
monitor debug system control register anyway, so implement a dummy
RAZ/WI version.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
This commit is contained in:
Peter Maydell 2014-02-26 17:20:03 +00:00
parent 168aa23bb0
commit 91e240698f
1 changed files with 6 additions and 0 deletions
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6
target-arm/helper.c
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@ -1656,6 +1656,12 @@ static const ARMCPRegInfo v8_cp_reginfo[] = {
.opc0 = 1, .opc2 = 0, .crn = 8, .crm = 7, .opc2 = 7,
.access = PL1_W, .type = ARM_CP_NO_MIGRATE,
.writefn = tlbi_aa64_vaa_write },
/* Dummy implementation of monitor debug system control register:
* we don't support debug.
*/
{ .name = "MDSCR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 2, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
REGINFO_SENTINEL
};