[PATCHv3 02/26] arm: mach-k3: introduce new config option for sysfw split

Tero Kristo kristo at kernel.org
Wed May 5 19:55:16 CEST 2021

From: Tero Kristo <t-kristo at ti.com>

On J7 family of SoCs (J721E and J7200), sysfw is being split to be run
under two cores, TIFS portion on DMSC core, and DM firmware under MCU
R5. As MCU R5 is also used to run one phase of the bootloader, we must
prevent access from here towards sysfw services. To support this, add
new config option which can be used to detect presence of RM/PM sysfw

Signed-off-by: Tero Kristo <t-kristo at ti.com>
Signed-off-by: Tero Kristo <kristo at kernel.org>
 arch/arm/mach-k3/Kconfig | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index c7d186149b..c92722eab6 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -141,6 +141,17 @@ config SYS_K3_SPL_ATF
 	  Enabling this will try to start Cortex-A (typically with ATF)
 	  after SPL from R5.
+config K3_DM_FW
+	bool "Separate DM firmware image"
+	depends on SPL && CPU_V7R && SOC_K3_J721E && !CLK_TI_SCI && !TI_SCI_POWER_DOMAIN
+	default y
+	help
+	  Enabling this will indicate that the system has separate DM
+	  and TIFS firmware images in place, instead of a single SYSFW
+	  firmware. Due to DM being executed on the same core as R5 SPL
+	  bootloader, it makes RM and PM services not being available
+	  during R5 SPL execution time.
 source "board/ti/am65x/Kconfig"
 source "board/ti/j721e/Kconfig"

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