mbed-os-to-arduino: add DTCM section only for M7 targets

Author: facchinm

Diff for: mbed-os-to-arduino

@@ -192,19 +192,24 @@ generate_flags () {
 			if [ x"$HAS_OPENAMP_SECTION" == x ]; then
 				echo "Adding OpenAMP section to $ARDUINOVARIANT/linker_script.ld"
 				OPENAMP_SECTION=".openamp_section (NOLOAD) : {\n \
-        . = ABSOLUTE(0x38000000);\n \
-        *(.resource_table)\n \
-    } >RAM_D3  AT > FLASH\n \
-    .pdm_section (NOLOAD) : {\n \
-        . = ABSOLUTE(0x3800FC00);\n \
-        *(.pdm_buffer)\n \
-    } > RAM_D3\n \
-    _dtcm_lma = __etext + SIZEOF(.data);\n \
-    .dtcm : AT(_dtcm_lma) {\n \
-        _sdtcm = .;\n \
-        *(.dtcm*)\n \
-        _edtcm = .;\n \
-    } > DTCMRAM"
+				. = ABSOLUTE(0x38000000);\n \
+				*(.resource_table)\n \
+				} >RAM_D3  AT > FLASH\n \
+				.pdm_section (NOLOAD) : {\n \
+				. = ABSOLUTE(0x3800FC00);\n \
+				*(.pdm_buffer)\n \
+				} > RAM_D3\n"
+
+				if [[ $ARDUINOVARIANT == *PORTENTA*M7* ]]; then
+					OPENAMP_SECTION=$OPENAMP_SECTION "\
+					_dtcm_lma = __etext + SIZEOF(.data);\n \
+					.dtcm : AT(_dtcm_lma) {\n \
+					_sdtcm = .;\n \
+					*(.dtcm*)\n \
+					_edtcm = .;\n \
+					} > DTCMRAM"
+				fi
+
 				sed -i "s?.heap (COPY):?${OPENAMP_SECTION}\n    .heap (COPY):?g" $ARDUINOVARIANT/linker_script.ld
 				OPENAMP_REGIONS="__OPENAMP_region_start__  = 0x38000400;\n__OPENAMP_region_end__ = 0x38000400 + LENGTH(RAM_D3) - 1K;"
 				sed -i "s?ENTRY(Reset_Handler)?${OPENAMP_REGIONS}\nENTRY(Reset_Handler)?g" $ARDUINOVARIANT/linker_script.ld