aboutsummaryrefslogtreecommitdiff
path: root/target-arm
diff options
context:
space:
mode:
authorPeter Maydell <peter.maydell@linaro.org>2012-06-20 11:57:20 +0000
committerPeter Maydell <peter.maydell@linaro.org>2012-06-20 12:10:54 +0000
commit81bdde9dcdba5bbc358b2c6b8f776a05a751cc72 (patch)
tree089fdb29b16a895498f2a6a14926f05fa8007b07 /target-arm
parent776d4e5c6ca47f8d7b73c9c8eccf20209bf57529 (diff)
downloadqemu-81bdde9dcdba5bbc358b2c6b8f776a05a751cc72.zip
qemu-81bdde9dcdba5bbc358b2c6b8f776a05a751cc72.tar.gz
qemu-81bdde9dcdba5bbc358b2c6b8f776a05a751cc72.tar.bz2
target-arm: Convert MPIDR
Convert the MPIDR to the new cp15 register scheme. This includes giving it its own feature bit rather than doing a CPUID value check. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm')
-rw-r--r--target-arm/cpu.c2
-rw-r--r--target-arm/cpu.h1
-rw-r--r--target-arm/helper.c50
3 files changed, 31 insertions, 22 deletions
diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index f4c9116..0c031ba 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -162,6 +162,7 @@ void arm_cpu_realize(ARMCPU *cpu)
if (arm_feature(env, ARM_FEATURE_V7)) {
set_feature(env, ARM_FEATURE_VAPA);
set_feature(env, ARM_FEATURE_THUMB2);
+ set_feature(env, ARM_FEATURE_MPIDR);
if (!arm_feature(env, ARM_FEATURE_M)) {
set_feature(env, ARM_FEATURE_V6K);
} else {
@@ -350,6 +351,7 @@ static void arm11mpcore_initfn(Object *obj)
set_feature(&cpu->env, ARM_FEATURE_V6K);
set_feature(&cpu->env, ARM_FEATURE_VFP);
set_feature(&cpu->env, ARM_FEATURE_VAPA);
+ set_feature(&cpu->env, ARM_FEATURE_MPIDR);
set_feature(&cpu->env, ARM_FEATURE_DUMMY_C15_REGS);
cpu->midr = ARM_CPUID_ARM11MPCORE;
cpu->reset_fpsid = 0x410120b4;
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 0b984d8..2630fe7 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -386,6 +386,7 @@ enum arm_features {
ARM_FEATURE_CACHE_TEST_CLEAN, /* 926/1026 style test-and-clean ops */
ARM_FEATURE_CACHE_DIRTY_REG, /* 1136/1176 cache dirty status register */
ARM_FEATURE_CACHE_BLOCK_OPS, /* v6 optional cache block operations */
+ ARM_FEATURE_MPIDR, /* has cp15 MPIDR */
};
static inline int arm_feature(CPUARMState *env, int feature)
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 269740d..1acc212 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -833,6 +833,31 @@ static const ARMCPRegInfo strongarm_cp_reginfo[] = {
REGINFO_SENTINEL
};
+static int mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t *value)
+{
+ uint32_t mpidr = env->cpu_index;
+ /* We don't support setting cluster ID ([8..11])
+ * so these bits always RAZ.
+ */
+ if (arm_feature(env, ARM_FEATURE_V7MP)) {
+ mpidr |= (1 << 31);
+ /* Cores which are uniprocessor (non-coherent)
+ * but still implement the MP extensions set
+ * bit 30. (For instance, A9UP.) However we do
+ * not currently model any of those cores.
+ */
+ }
+ *value = mpidr;
+ return 0;
+}
+
+static const ARMCPRegInfo mpidr_cp_reginfo[] = {
+ { .name = "MPIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
+ .access = PL1_R, .readfn = mpidr_read },
+ REGINFO_SENTINEL
+};
+
static int sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
env->cp15.c1_sys = value;
@@ -975,6 +1000,9 @@ 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_AUXCR)) {
ARMCPRegInfo auxcr = {
.name = "AUXCR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1,
@@ -2121,28 +2149,6 @@ uint32_t HELPER(get_cp15)(CPUARMState *env, uint32_t insn)
return 0;
case 3: /* TLB type register. */
return 0; /* No lockable TLB entries. */
- case 5: /* MPIDR */
- /* The MPIDR was standardised in v7; prior to
- * this it was implemented only in the 11MPCore.
- * For all other pre-v7 cores it does not exist.
- */
- if (arm_feature(env, ARM_FEATURE_V7) ||
- ARM_CPUID(env) == ARM_CPUID_ARM11MPCORE) {
- int mpidr = env->cpu_index;
- /* We don't support setting cluster ID ([8..11])
- * so these bits always RAZ.
- */
- if (arm_feature(env, ARM_FEATURE_V7MP)) {
- mpidr |= (1 << 31);
- /* Cores which are uniprocessor (non-coherent)
- * but still implement the MP extensions set
- * bit 30. (For instance, A9UP.) However we do
- * not currently model any of those cores.
- */
- }
- return mpidr;
- }
- /* otherwise fall through to the unimplemented-reg case */
default:
goto bad_reg;
}