Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

# SPDX-License-Identifier: GPL-2.0-only
menuconfig CONFIG_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 CONFIG_MAILBOX

config CONFIG_ARM_MHU
	tristate "ARM MHU Mailbox"
	depends on CONFIG_ARM_AMBA
	help
	  Say Y here if you want to build the CONFIG_ARM MHU controller driver.
	  The controller has 3 mailbox channels, the last of which can be
	  used in Secure mode only.

config CONFIG_IMX_MBOX
	tristate "i.MX Mailbox"
	depends on CONFIG_ARCH_MXC || CONFIG_COMPILE_TEST
	help
	  Mailbox implementation for i.MX Messaging Unit (MU).

config CONFIG_PLATFORM_MHU
	tristate "Platform MHU Mailbox"
	depends on CONFIG_OF
	depends on CONFIG_HAS_IOMEM
	help
	  Say Y here if you want to build a platform specific variant MHU
	  controller driver.
	  The controller has a maximum of 3 mailbox channels, the last of
	  which can be used in Secure mode only.

config CONFIG_PL320_MBOX
	bool "ARM PL320 Mailbox"
	depends on CONFIG_ARM_AMBA
	help
	  An implementation of the CONFIG_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 CONFIG_ARMADA_37XX_RWTM_MBOX
	tristate "Armada 37xx rWTM BIU Mailbox"
	depends on CONFIG_ARCH_MVEBU || CONFIG_COMPILE_TEST
	depends on CONFIG_OF
	help
	  Mailbox implementation for communication with the the firmware
	  running on the Cortex-M3 rWTM secure processor of the Armada 37xx
	  SOC. Say Y here if you are building for such a device (for example
	  the Turris Mox router).

config CONFIG_OMAP2PLUS_MBOX
	tristate "OMAP2+ Mailbox framework support"
	depends on CONFIG_ARCH_OMAP2PLUS || CONFIG_ARCH_K3
	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 CONFIG_OMAP_MBOX_KFIFO_SIZE
	int "Mailbox kfifo default buffer size (bytes)"
	depends on CONFIG_OMAP2PLUS_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).

config CONFIG_ROCKCHIP_MBOX
	bool "Rockchip Soc Intergrated Mailbox Support"
	depends on CONFIG_ARCH_ROCKCHIP || CONFIG_COMPILE_TEST
	help
	  This driver provides support for inter-processor communication
	  between CPU cores and MCU processor on Some Rockchip SOCs.
	  Please check it that the Soc you use have Mailbox hardware.
	  Say Y here if you want to use the Rockchip Mailbox support.

config CONFIG_PCC
	bool "Platform Communication Channel Driver"
	depends on CONFIG_ACPI
	default n
	help
	  CONFIG_ACPI 5.0+ spec defines a generic mode of communication
	  between the OS and a platform such as the BMC. This medium
	  (CONFIG_PCC) is typically used by CPPC (CONFIG_ACPI CPU Performance management),
	  CONFIG_RAS (CONFIG_ACPI reliability protocol) and MPST (CONFIG_ACPI Memory power
	  states). Select this driver if your platform implements the
	  CONFIG_PCC clients mentioned above.

config CONFIG_ALTERA_MBOX
	tristate "Altera Mailbox"
	depends on CONFIG_HAS_IOMEM
	help
	  An implementation of the Altera Mailbox soft core. It is used
	  to send message between processors. Say Y here if you want to use the
	  Altera mailbox support.

config CONFIG_BCM2835_MBOX
	tristate "BCM2835 Mailbox"
	depends on CONFIG_ARCH_BCM2835
	help
	  An implementation of the BCM2385 Mailbox.  It is used to invoke
	  the services of the Videocore. Say Y here if you want to use the
	  BCM2835 Mailbox.

config CONFIG_STI_MBOX
	tristate "STI Mailbox framework support"
	depends on CONFIG_ARCH_STI && CONFIG_OF
	help
	  Mailbox implementation for STMicroelectonics family chips with
	  hardware for interprocessor communication.

config CONFIG_TI_MESSAGE_MANAGER
	tristate "Texas Instruments Message Manager Driver"
	depends on CONFIG_ARCH_KEYSTONE || CONFIG_ARCH_K3
	help
	  An implementation of Message Manager slave driver for Keystone
	  and K3 architecture SoCs from Texas Instruments. Message Manager
	  is a communication entity found on few of Texas Instrument's keystone
	  and K3 architecture SoCs. These may be used for communication between
	  multiple processors within the SoC. Select this driver if your
	  platform has support for the hardware block.

config CONFIG_HI3660_MBOX
	tristate "Hi3660 Mailbox" if CONFIG_EXPERT
	depends on (CONFIG_ARCH_HISI || CONFIG_COMPILE_TEST)
	depends on CONFIG_OF
	default CONFIG_ARCH_HISI
	help
	  An implementation of the hi3660 mailbox. It is used to send message
	  between application processors and other processors/MCU/DSP. Select
	  Y here if you want to use Hi3660 mailbox controller.

config CONFIG_HI6220_MBOX
	tristate "Hi6220 Mailbox" if CONFIG_EXPERT
	depends on (CONFIG_ARCH_HISI || CONFIG_COMPILE_TEST)
	depends on CONFIG_OF
	default CONFIG_ARCH_HISI
	help
	  An implementation of the hi6220 mailbox. It is used to send message
	  between application processors and MCU. Say Y here if you want to
	  build Hi6220 mailbox controller driver.

config CONFIG_MAILBOX_TEST
	tristate "Mailbox Test Client"
	depends on CONFIG_OF
	depends on CONFIG_HAS_IOMEM
	help
	  Test client to help with testing new Controller driver
	  implementations.

config CONFIG_QCOM_APCS_IPC
	tristate "Qualcomm APCS IPC driver"
	depends on CONFIG_ARCH_QCOM || CONFIG_COMPILE_TEST
	help
	  Say y here to enable support for the APCS IPC mailbox driver,
	  providing an interface for invoking the inter-process communication
	  signals from the application processor to other masters.

config CONFIG_TEGRA_HSP_MBOX
	bool "Tegra HSP (Hardware Synchronization Primitives) Driver"
	depends on CONFIG_ARCH_TEGRA
	help
	  The Tegra HSP driver is used for the interprocessor communication
	  between different remote processors and host processors on Tegra186
	  and later SoCs. Say Y here if you want to have this support.
	  If unsure say N.

config CONFIG_XGENE_SLIMPRO_MBOX
	tristate "APM SoC X-Gene SLIMpro Mailbox Controller"
	depends on CONFIG_ARCH_XGENE
	help
	  An implementation of the CONFIG_APM X-Gene Interprocessor Communication
	  Mailbox (IPCM) between the CONFIG_ARM 64-bit cores and SLIMpro controller.
	  It is used to send short messages between CONFIG_ARM64-bit cores and
	  the SLIMpro Management Engine, primarily for CONFIG_PM. Say Y here if you
	  want to use the CONFIG_APM X-Gene SLIMpro IPCM support.

config CONFIG_BCM_PDC_MBOX
	tristate "Broadcom FlexSparx DMA Mailbox"
	depends on CONFIG_ARCH_BCM_IPROC || CONFIG_COMPILE_TEST
	help
	  Mailbox implementation for the Broadcom FlexSparx DMA ring manager,
	  which provides access to various offload engines on Broadcom
	  SoCs, including FA2/FA+ on Northstar Plus and PDC on Northstar 2.

config CONFIG_BCM_FLEXRM_MBOX
	tristate "Broadcom FlexRM Mailbox"
	depends on CONFIG_ARM64
	depends on CONFIG_ARCH_BCM_IPROC || CONFIG_COMPILE_TEST
	select CONFIG_GENERIC_MSI_IRQ_DOMAIN
	default m if CONFIG_ARCH_BCM_IPROC
	help
	  Mailbox implementation of the Broadcom FlexRM ring manager,
	  which provides access to various offload engines on Broadcom
	  SoCs. Say Y here if you want to use the Broadcom FlexRM.

config CONFIG_STM32_IPCC
	tristate "STM32 IPCC Mailbox"
	depends on CONFIG_MACH_STM32MP157
	help
	  Mailbox implementation for STMicroelectonics STM32 family chips
	  with hardware for Inter-Processor Communication Controller (IPCC)
	  between processors. Say Y here if you want to have this support.

config CONFIG_MTK_CMDQ_MBOX
	tristate "MediaTek CMDQ Mailbox Support"
	depends on CONFIG_ARCH_MEDIATEK || CONFIG_COMPILE_TEST
	select CONFIG_MTK_INFRACFG
	help
	  Say yes here to add support for the MediaTek Command Queue (CMDQ)
	  mailbox driver. The CMDQ is used to help read/write registers with
	  critical time limitation, such as updating display configuration
	  during the vblank.

config CONFIG_ZYNQMP_IPI_MBOX
	bool "Xilinx ZynqMP IPI Mailbox"
	depends on CONFIG_ARCH_ZYNQMP && CONFIG_OF
	help
	  Say yes here to add support for Xilinx IPI mailbox driver.
	  This mailbox driver is used to send notification or short message
	  between processors with Xilinx ZynqMP IPI. It will place the
	  message to the IPI buffer and will access the IPI control
	  registers to kick the other processor or enquire status.

endif