| Message ID | 1391183143-30724-36-git-send-email-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
On Sat, Feb 1, 2014 at 1:45 AM, Peter Maydell <peter.maydell@linaro.org> wrote: > Define a dummy version of the AArch64 OSLAR_EL1 system register > which just ignores writes. Linux will always write to this (it > is the OS lock used for debugging), but we don't support debug. > > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> > --- > target-arm/helper.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/target-arm/helper.c b/target-arm/helper.c > index 1621030..43a4f31 100644 > --- a/target-arm/helper.c > +++ b/target-arm/helper.c > @@ -1764,6 +1764,10 @@ static const ARMCPRegInfo v8_cp_reginfo[] = { > { .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 }, > + /* We define a dummy WI OSLAR_EL1, because Linux writes to it. */ > + { .name = "OSLAR_EL1", .state = ARM_CP_STATE_AA64, > + .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4, > + .access = PL1_W, .type = ARM_CP_NOP }, > REGINFO_SENTINEL > }; > > -- > 1.8.5 > >
diff --git a/target-arm/helper.c b/target-arm/helper.c index 1621030..43a4f31 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -1764,6 +1764,10 @@ static const ARMCPRegInfo v8_cp_reginfo[] = { { .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 }, + /* We define a dummy WI OSLAR_EL1, because Linux writes to it. */ + { .name = "OSLAR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4, + .access = PL1_W, .type = ARM_CP_NOP }, REGINFO_SENTINEL };
Define a dummy version of the AArch64 OSLAR_EL1 system register which just ignores writes. Linux will always write to this (it is the OS lock used for debugging), but we don't support debug. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- target-arm/helper.c | 4 ++++ 1 file changed, 4 insertions(+)