static volatile lowpower_mailbox_t * lowpower_mailbox(void)
Typed pointer to the fixed-address shared mailbox.
lowpower_const_t
Signature + active-core enumerators shared by both core images.
@ k_lowpower_magic
"HOLD" – M85 stamps it when ready.
@ k_lowpower_core_m85
active_core: the M85 owns the page.
@ k_lowpower_core_m33
active_core: the M33 holds the page.
lowpower_mailbox_addr_t
Fixed shared-SRAM base address of the mailbox.
@ k_lowpower_mailbox_addr
Mailbox base = window base.