target/xtensa: add static vectors selection

Commit Message

Max Filippov Jan. 15, 2017, 9:03 p.m. UTC

Xtensa cores may have two distinct addresses for the static vectors
group. Provide a function to select one of them.

Signed-off-by: Max Filippov <[e-mail]>
---
 target/xtensa/cpu.c          |  2 +-
 target/xtensa/cpu.h          | 10 +++++++++-
 target/xtensa/overlay_tool.h | 11 ++++++++++-
 3 files changed, 20 insertions(+), 3 deletions(-)

Patch

diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
index e8e9f91..09b53c7 100644
--- a/target/xtensa/cpu.c
+++ b/target/xtensa/cpu.c
@@ -60,7 +60,7 @@  static void xtensa_cpu_reset(CPUState *s)
     xcc->parent_reset(s);
 
     env->exception_taken = 0;
-    env->pc = env->config->exception_vector[EXC_RESET];
+    env->pc = env->config->exception_vector[EXC_RESET0 + env->static_vectors];
     env->sregs[LITBASE] &= ~1;
     env->sregs[PS] = xtensa_option_enabled(env->config,
             XTENSA_OPTION_INTERRUPT) ? 0x1f : 0x10;
diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h
index 7fe82a3..6b044d3 100644
--- a/target/xtensa/cpu.h
+++ b/target/xtensa/cpu.h
@@ -209,7 +209,8 @@  enum {
 
 enum {
     /* Static vectors */
-    EXC_RESET,
+    EXC_RESET0,
+    EXC_RESET1,
     EXC_MEMORY_ERROR,
 
     /* Dynamic vectors */
@@ -373,6 +374,7 @@  typedef struct CPUXtensaState {
     int64_t halt_clock;
 
     int exception_taken;
+    unsigned static_vectors;
 
     /* Watchpoints for DBREAK registers */
     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
@@ -461,6 +463,12 @@  void reset_mmu(CPUXtensaState *env);
 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
 
+static inline void xtensa_select_static_vectors(CPUXtensaState *env,
+                                                unsigned n)
+{
+    assert(n < 2);
+    env->static_vectors = n;
+}
 
 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
 #define XTENSA_OPTION_ALL (~(uint64_t)0)
diff --git a/target/xtensa/overlay_tool.h b/target/xtensa/overlay_tool.h
index e8a7fda..5357142 100644
--- a/target/xtensa/overlay_tool.h
+++ b/target/xtensa/overlay_tool.h
@@ -47,6 +47,14 @@ 
 #define XCHAL_VECBASE_RESET_VADDR 0
 #endif
 
+#ifndef XCHAL_RESET_VECTOR0_VADDR
+#define XCHAL_RESET_VECTOR0_VADDR XCHAL_RESET_VECTOR_VADDR
+#endif
+
+#ifndef XCHAL_RESET_VECTOR1_VADDR
+#define XCHAL_RESET_VECTOR1_VADDR XCHAL_RESET_VECTOR_VADDR
+#endif
+
 #ifndef XCHAL_HW_MIN_VERSION
 #define XCHAL_HW_MIN_VERSION 0
 #endif
@@ -133,7 +141,8 @@ 
 #endif
 
 #define EXCEPTION_VECTORS { \
-        [EXC_RESET] = XCHAL_RESET_VECTOR_VADDR, \
+        [EXC_RESET0] = XCHAL_RESET_VECTOR0_VADDR, \
+        [EXC_RESET1] = XCHAL_RESET_VECTOR1_VADDR, \
         WINDOW_VECTORS \
         [EXC_KERNEL] = XCHAL_KERNEL_VECTOR_VADDR, \
         [EXC_USER] = XCHAL_USER_VECTOR_VADDR, \