xtensa: update HAL path for custom compilations

Xtensa arch layer has some custom compilation commands to
generate the interrupt dispatchers and the core-isa* files.
However, the include path to find core-isa.h does not work
for Espressif ESP32. So update the mechanism to use correct
path pointing to Espressif HAL when targeting ESP32 family
SoCs.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

Author: dcpleung

arch/xtensa/core/CMakeLists.txt

@@ -39,6 +39,17 @@ if("${ZEPHYR_TOOLCHAIN_VARIANT}" STREQUAL "xcc")
   zephyr_library_sources(xcc_stubs.c)
 endif()
 
+# ...where to find core-isa.h for custom compilation commands below.
+if(CONFIG_SOC_FAMILY_ESPRESSIF_ESP32)
+  set(XTENSA_CONFIG_HAL_INCLUDE_DIR
+      -I${ZEPHYR_HAL_ESPRESSIF_MODULE_DIR}/components/xtensa/${CONFIG_SOC}/include
+     )
+else()
+  set(XTENSA_CONFIG_HAL_INCLUDE_DIR
+      -I${ZEPHYR_XTENSA_MODULE_DIR}/zephyr/soc/${CONFIG_SOC}
+     )
+endif()
+
 add_subdirectory(startup)
 
 # This produces a preprocessed and regenerated (in the sense of gcc
@@ -54,7 +65,7 @@ set(CORE_ISA_IN ${CMAKE_BINARY_DIR}/zephyr/include/generated/core-isa-dM.c)
 file(WRITE ${CORE_ISA_IN} "#include <xtensa/config/core-isa.h>\n")
 add_custom_command(OUTPUT ${CORE_ISA_DM}
   COMMAND ${CMAKE_C_COMPILER} -E -dM -U__XCC__ ${XTENSA_CORE_LOCAL_C_FLAG}
-          -I${ZEPHYR_XTENSA_MODULE_DIR}/zephyr/soc/${CONFIG_SOC}
+          ${XTENSA_CONFIG_HAL_INCLUDE_DIR}
           -I${SOC_FULL_DIR}
           ${CORE_ISA_IN} -o ${CORE_ISA_DM})
 
@@ -98,7 +109,7 @@ set(HANDLERS ${CMAKE_BINARY_DIR}/zephyr/include/generated/xtensa_handlers)
 add_custom_command(
   OUTPUT ${HANDLERS}_tmp.c
   COMMAND ${CMAKE_C_COMPILER} -E -U__XCC__
-	  -I${ZEPHYR_XTENSA_MODULE_DIR}/zephyr/soc/${CONFIG_SOC}
+          ${XTENSA_CONFIG_HAL_INCLUDE_DIR}
 	  -o ${HANDLERS}_tmp.c
 	  - < ${CMAKE_CURRENT_SOURCE_DIR}/xtensa_intgen.tmpl)