Hi Randolph, On Fri, 6 Oct 2023 at 05:27, Randolph <[email protected]> wrote: > > Introduce common Kconfig symbol for riscv architecture. > This symbol SPL_LOAD_FIT_OPENSBI_OS_BOOT is like falcon mode on ARM, > the Falcon boot is a shortcut boot method for SD/eMMC targets. It > skips the loading the RAM version U-Boot. Instead, it will loads > the FIT image and boots directly to Linux. > > When SPL_OPENSBI_OS_BOOT is enabled, linux.itb is created after > compilation instead of the default u-boot.itb. It initialises memory > with the U-Boot SPL at the first stage, just as a normal boot process > does at the beginning. Instead of jumping to the U-Boot proper from > OpenSBI before booting the Linux kernel, the RISC-V falcon mode > process jumps directly to the Linux kernel to gain shorter booting time. > > When SPL_OPENSBI_OS_BOOT is enabled, it will change the default FIT > configure file "binman.dtsi" to "binman_linux.dtsi" > Default is not enabled. > > Signed-off-by: Randolph <[email protected]> > --- > arch/riscv/Kconfig | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index ec1cfcaaa7..4f104789a7 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -422,8 +422,17 @@ config TPL_USE_ARCH_MEMSET > > endmenu > > +config SPL_LOAD_FIT_OPENSBI_OS_BOOT > + bool "Enable SPL (OpenSBI OS boot mode) applying linux from FIT" > + depends on SPL_LOAD_FIT > + help > + Use fw_dynamic from the FIT image, and u-boot SPL will invoke it > directly. > + This is a shortcut boot flow, from u-boot SPL -> OpenSBI -> u-boot > proper > + -> linux to u-boot SPL -> OpenSBI -> linux.
This bit seems OK > + > config SPL_LOAD_FIT_CONFIG > string "Default FIT configuration for SPL" > + default "binman_linux.dtsi" if SPL_LOAD_FIT_OPENSBI_OS_BOOT But I'm hoping you can drop this and put the logic in binman.dtsi > default "binman.dtsi" > depends on SPL_LOAD_FIT > help > -- > 2.34.1 > Regards, Simon
