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-rw-r--r--target/arm/helper.c49
1 files changed, 47 insertions, 2 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c
index f91e5d5345..b61ee73d18 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11780,7 +11780,40 @@ bool get_phys_addr(CPUARMState *env, target_ulong address,
     /* Definitely a real MMU, not an MPU */
 
     if (regime_translation_disabled(env, mmu_idx)) {
-        /* MMU disabled. */
+        /*
+         * MMU disabled.  S1 addresses within aa64 translation regimes are
+         * still checked for bounds -- see AArch64.TranslateAddressS1Off.
+         */
+        if (mmu_idx != ARMMMUIdx_Stage2) {
+            int r_el = regime_el(env, mmu_idx);
+            if (arm_el_is_aa64(env, r_el)) {
+                int pamax = arm_pamax(env_archcpu(env));
+                uint64_t tcr = env->cp15.tcr_el[r_el].raw_tcr;
+                int addrtop, tbi;
+
+                tbi = aa64_va_parameter_tbi(tcr, mmu_idx);
+                if (access_type == MMU_INST_FETCH) {
+                    tbi &= ~aa64_va_parameter_tbid(tcr, mmu_idx);
+                }
+                tbi = (tbi >> extract64(address, 55, 1)) & 1;
+                addrtop = (tbi ? 55 : 63);
+
+                if (extract64(address, pamax, addrtop - pamax + 1) != 0) {
+                    fi->type = ARMFault_AddressSize;
+                    fi->level = 0;
+                    fi->stage2 = false;
+                    return 1;
+                }
+
+                /*
+                 * When TBI is disabled, we've just validated that all of the
+                 * bits above PAMax are zero, so logically we only need to
+                 * clear the top byte for TBI.  But it's clearer to follow
+                 * the pseudocode set of addrdesc.paddress.
+                 */
+                address = extract64(address, 0, 52);
+            }
+        }
         *phys_ptr = address;
         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
         *page_size = TARGET_PAGE_SIZE;
@@ -12468,6 +12501,18 @@ void arm_rebuild_hflags(CPUARMState *env)
     env->hflags = rebuild_hflags_internal(env);
 }
 
+/*
+ * If we have triggered a EL state change we can't rely on the
+ * translator having passed it to us, we need to recompute.
+ */
+void HELPER(rebuild_hflags_m32_newel)(CPUARMState *env)
+{
+    int el = arm_current_el(env);
+    int fp_el = fp_exception_el(env, el);
+    ARMMMUIdx mmu_idx = arm_mmu_idx_el(env, el);
+    env->hflags = rebuild_hflags_m32(env, fp_el, mmu_idx);
+}
+
 void HELPER(rebuild_hflags_m32)(CPUARMState *env, int el)
 {
     int fp_el = fp_exception_el(env, el);
@@ -12478,7 +12523,7 @@ void HELPER(rebuild_hflags_m32)(CPUARMState *env, int el)
 
 /*
  * If we have triggered a EL state change we can't rely on the
- * translator having passed it too us, we need to recompute.
+ * translator having passed it to us, we need to recompute.
  */
 void HELPER(rebuild_hflags_a32_newel)(CPUARMState *env)
 {