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authorPeter Crosthwaite <peter.crosthwaite@xilinx.com>2013-07-10 14:22:21 +1000
committerPeter Maydell <peter.maydell@linaro.org>2013-07-15 15:15:37 +0100
commitfae586739956cdc70b42f058b2c75d3e83cde21b (patch)
treeeebb5b45905a7c30f1c8c6e6b996e1a415e0c2c8
parent86230e8d3235bd496ef6f1a17b393a760979f190 (diff)
downloadqemu-arm-fae586739956cdc70b42f058b2c75d3e83cde21b.tar.gz
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>
-rw-r--r--target-arm/helper.c16
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,