---

#if defined(CONFIG_LINKER_USE_PINNED_SECTION)
#define PINNED_TEXT_SECTION_NAME	pinned_text
#define PINNED_BSS_SECTION_NAME		pinned_bss
#define PINNED_RODATA_SECTION_NAME	pinned_rodata
#define PINNED_DATA_SECTION_NAME	pinned_data
#define PINNED_NOINIT_SECTION_NAME	pinned_noinit
#endif

надо использовать CONFIG_LINKER_USE_PINNED_SECTION и указать pinned как OCRAM, которого у нас 64kb