target/arm: Declare some M-profile functions publicly

In the next commit we will split the M-profile functions from this
file. Some function will be called out of helper.c. Declare them in
the "internals.h" header.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190701132516.26392-22-philmd@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/target/arm/internals.h b/target/arm/internals.h
index 11bfdba512..232d963875 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -893,6 +893,27 @@ static inline uint32_t v7m_sp_limit(CPUARMState *env)
 }
 
 /**
+ * v7m_cpacr_pass:
+ * Return true if the v7M CPACR permits access to the FPU for the specified
+ * security state and privilege level.
+ */
+static inline bool v7m_cpacr_pass(CPUARMState *env,
+                                  bool is_secure, bool is_priv)
+{
+    switch (extract32(env->v7m.cpacr[is_secure], 20, 2)) {
+    case 0:
+    case 2: /* UNPREDICTABLE: we treat like 0 */
+        return false;
+    case 1:
+        return is_priv;
+    case 3:
+        return true;
+    default:
+        g_assert_not_reached();
+    }
+}
+
+/**
  * aarch32_mode_name(): Return name of the AArch32 CPU mode
  * @psr: Program Status Register indicating CPU mode
  *
@@ -988,6 +1009,27 @@ static inline int exception_target_el(CPUARMState *env)
 
 #ifndef CONFIG_USER_ONLY
 
+/* Security attributes for an address, as returned by v8m_security_lookup. */
+typedef struct V8M_SAttributes {
+    bool subpage; /* true if these attrs don't cover the whole TARGET_PAGE */
+    bool ns;
+    bool nsc;
+    uint8_t sregion;
+    bool srvalid;
+    uint8_t iregion;
+    bool irvalid;
+} V8M_SAttributes;
+
+void v8m_security_lookup(CPUARMState *env, uint32_t address,
+                         MMUAccessType access_type, ARMMMUIdx mmu_idx,
+                         V8M_SAttributes *sattrs);
+
+bool pmsav8_mpu_lookup(CPUARMState *env, uint32_t address,
+                       MMUAccessType access_type, ARMMMUIdx mmu_idx,
+                       hwaddr *phys_ptr, MemTxAttrs *txattrs,
+                       int *prot, bool *is_subpage,
+                       ARMMMUFaultInfo *fi, uint32_t *mregion);
+
 /* Cacheability and shareability attributes for a memory access */
 typedef struct ARMCacheAttrs {
     unsigned int attrs:8; /* as in the MAIR register encoding */