From 11807abd4e09b70ecc6b65856d00edb8a1a62063 Mon Sep 17 00:00:00 2001
From: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
Date: Thu, 24 Mar 2022 22:37:48 +0100
Subject: [PATCH] arch/xtensa: Add xtensa_tcbinfo struct that contains helpful
 offsets.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
---
 arch/xtensa/src/common/xtensa_tcbinfo.c | 75 +++++++++++++++++++++++++
 arch/xtensa/src/esp32/Make.defs         |  5 ++
 2 files changed, 80 insertions(+)
 create mode 100644 arch/xtensa/src/common/xtensa_tcbinfo.c

diff --git a/arch/xtensa/src/common/xtensa_tcbinfo.c b/arch/xtensa/src/common/xtensa_tcbinfo.c
new file mode 100644
index 00000000000..7e9c9ab2848
--- /dev/null
+++ b/arch/xtensa/src/common/xtensa_tcbinfo.c
@@ -0,0 +1,75 @@
+/****************************************************************************
+ * arch/xtensa/src/common/xtensa_tcbinfo.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/sched.h>
+#include <arch/irq.h>
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const uint16_t g_reg_offs[] =
+{
+  TCB_REG_OFF(REG_PC),
+  TCB_REG_OFF(REG_PS),
+  TCB_REG_OFF(REG_A0),
+  TCB_REG_OFF(REG_A1),
+  TCB_REG_OFF(REG_A2),
+  TCB_REG_OFF(REG_A3),
+  TCB_REG_OFF(REG_A4),
+  TCB_REG_OFF(REG_A5),
+  TCB_REG_OFF(REG_A6),
+  TCB_REG_OFF(REG_A7),
+  TCB_REG_OFF(REG_A8),
+  TCB_REG_OFF(REG_A9),
+  TCB_REG_OFF(REG_A10),
+  TCB_REG_OFF(REG_A11),
+  TCB_REG_OFF(REG_A12),
+  TCB_REG_OFF(REG_A13),
+  TCB_REG_OFF(REG_A14),
+  TCB_REG_OFF(REG_A15),
+};
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+const struct tcbinfo_s g_tcbinfo =
+{
+  .pid_off   = TCB_PID_OFF,
+  .state_off = TCB_STATE_OFF,
+  .pri_off   = TCB_PRI_OFF,
+  .name_off  = TCB_NAME_OFF,
+  .reg_num   = XCPTCONTEXT_REGS,
+  {
+    .p = g_reg_offs,
+  },
+};
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
diff --git a/arch/xtensa/src/esp32/Make.defs b/arch/xtensa/src/esp32/Make.defs
index 5e0b238a55e..f90195d53bf 100644
--- a/arch/xtensa/src/esp32/Make.defs
+++ b/arch/xtensa/src/esp32/Make.defs
@@ -43,6 +43,11 @@ CMN_CSRCS += xtensa_unblocktask.c xtensa_usestack.c xtensa_swint.c xtensa_switch
 
 # Configuration-dependent common XTENSA files
 
+ifeq ($(CONFIG_DEBUG_TCBINFO),y)
+  CMN_CSRCS += xtensa_tcbinfo.c
+endif
+
+
 ifeq ($(CONFIG_DEBUG_ALERT),y)
   CMN_CSRCS += xtensa_dumpstate.c
 endif