diff options
| author | Peter Crosthwaite <peter.crosthwaite@xilinx.com> | 2013-07-10 14:22:21 +1000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2013-07-15 17:13:51 +0100 |
| commit | 97ce8d61559b99492b4d389eba51a198e55b8455 (patch) | |
| tree | eebb5b45905a7c30f1c8c6e6b996e1a415e0c2c8 /target-arm/helper.c | |
| parent | a703eda18a5c3e9b45f2b9a337a3e1e16c836cf9 (diff) | |
target-arm/helper.c: Implement MIDR aliases
Unimplemented registers in the cp15, CRn=0, opc1=0, CRm=0 space default
to aliasing the MIDR register. Set all registers in the space to access
MIDR by default.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 6127846712b7ad2727354a4f5e1d809451f1e859.1373429432.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index 47e6c09387..8d8a8de3bd 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -1378,9 +1378,6 @@ void register_cp_regs_for_features(ARMCPU *cpu) if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) { define_arm_cp_regs(cpu, dummy_c15_cp_reginfo); } - if (arm_feature(env, ARM_FEATURE_MPIDR)) { - define_arm_cp_regs(cpu, mpidr_cp_reginfo); - } if (arm_feature(env, ARM_FEATURE_LPAE)) { define_arm_cp_regs(cpu, lpae_cp_reginfo); } @@ -1393,12 +1390,17 @@ void register_cp_regs_for_features(ARMCPU *cpu) /* Note that the MIDR isn't a simple constant register because * of the TI925 behaviour where writes to another register can * cause the MIDR value to change. + * + * Unimplemented registers in the c15 0 0 0 space default to + * MIDR. Define MIDR first as this entire space, then CTR, TCMTR + * and friends override accordingly. */ { .name = "MIDR", - .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0, + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY, .access = PL1_R, .resetvalue = cpu->midr, .writefn = arm_cp_write_ignore, .raw_writefn = raw_write, - .fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid) }, + .fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid), + .type = ARM_CP_OVERRIDE }, { .name = "CTR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr }, @@ -1447,6 +1449,10 @@ void register_cp_regs_for_features(ARMCPU *cpu) define_arm_cp_regs(cpu, id_cp_reginfo); } + if (arm_feature(env, ARM_FEATURE_MPIDR)) { + define_arm_cp_regs(cpu, mpidr_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_AUXCR)) { ARMCPRegInfo auxcr = { .name = "AUXCR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, |