target/arm: Implement LDG, STG, ST2G instructions

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-16-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index eb0de08..b106521 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -935,3 +935,19 @@ uint32_t HELPER(ror_cc)(CPUARMState *env, uint32_t x, uint32_t i)
         return ((uint32_t)x >> shift) | (x << (32 - shift));
     }
 }
+
+void HELPER(probe_access)(CPUARMState *env, target_ulong ptr,
+                          uint32_t access_type, uint32_t mmu_idx,
+                          uint32_t size)
+{
+    uint32_t in_page = -((uint32_t)ptr | TARGET_PAGE_SIZE);
+    uintptr_t ra = GETPC();
+
+    if (likely(size <= in_page)) {
+        probe_access(env, ptr, size, access_type, mmu_idx, ra);
+    } else {
+        probe_access(env, ptr, in_page, access_type, mmu_idx, ra);
+        probe_access(env, ptr + in_page, size - in_page,
+                     access_type, mmu_idx, ra);
+    }
+}