menuconfig MAILBOX bool "Mailbox Hardware Support" help Mailbox is a framework to control hardware communication between on-chip processors through queued messages and interrupt driven signals. Say Y if your platform supports hardware mailboxes. if MAILBOX config PL320_MBOX bool "ARM PL320 Mailbox" depends on ARM_AMBA help An implementation of the ARM PL320 Interprocessor Communication Mailbox (IPCM), tailored for the Calxeda Highbank. It is used to send short messages between Highbank's A9 cores and the EnergyCore Management Engine, primarily for cpufreq. Say Y here if you want to use the PL320 IPCM support. config OMAP_MBOX tristate help This option is selected by any OMAP architecture specific mailbox driver such as CONFIG_OMAP1_MBOX or CONFIG_OMAP2PLUS_MBOX. This enables the common OMAP mailbox framework code. config OMAP1_MBOX tristate "OMAP1 Mailbox framework support" depends on ARCH_OMAP1 select OMAP_MBOX help Mailbox implementation for OMAP chips with hardware for interprocessor communication involving DSP in OMAP1. Say Y here if you want to use OMAP1 Mailbox framework support. config OMAP2PLUS_MBOX tristate "OMAP2+ Mailbox framework support" depends on ARCH_OMAP2PLUS select OMAP_MBOX help Mailbox implementation for OMAP family chips with hardware for interprocessor communication involving DSP, IVA1.0 and IVA2 in OMAP2/3; or IPU, IVA HD and DSP in OMAP4/5. Say Y here if you want to use OMAP2+ Mailbox framework support. config OMAP_MBOX_KFIFO_SIZE int "Mailbox kfifo default buffer size (bytes)" depends on OMAP2PLUS_MBOX || OMAP1_MBOX default 256 help Specify the default size of mailbox's kfifo buffers (bytes). This can also be changed at runtime (via the mbox_kfifo_size module parameter). endif