config BINMAN_STANDALONE_FDT
bool
depends on BINMAN
- default y if OF_BOARD || OF_PRIOR_STAGE
+ default y if OF_BOARD
help
This option tells U-Boot build system that a standalone device tree
source is explicitly required when using binman to package U-Boot.
directory for a specific board. Such device tree sources are built for
OF_SEPARATE or OF_EMBED. However for a scenario like the board device
tree blob is not provided in the U-Boot build tree, but fed to U-Boot
- in the runtime, e.g.: in the OF_PRIOR_STAGE case that it is passed by
+ in the runtime, e.g.: in the OF_BOARD case that it is passed by
a prior stage bootloader. For such scenario, a standalone device tree
blob containing binman node to describe how to package U-Boot should
be provided explicitly.
This is only useful for Sandbox. Use the -d flag to U-Boot to
specify the file to read.
-config OF_PRIOR_STAGE
- bool "Prior stage bootloader DTB for DT control"
- help
- If this option is enabled, the device tree used for DT
- control will be read from a device tree binary, at a memory
- location passed to U-Boot by the prior stage bootloader.
-
endchoice
config DEFAULT_DEVICE_TREE
#define SPL_BUILD 0
#endif
-#ifdef CONFIG_OF_PRIOR_STAGE
-extern phys_addr_t prior_stage_fdt_address;
-#endif
-
/*
* Information about a resource. start is the first address of the resource
* and end is the last address (inclusive). The length of the resource will
puts("Failed to read control FDT\n");
return -1;
}
-# elif defined(CONFIG_OF_PRIOR_STAGE)
- gd->fdt_blob = (void *)(uintptr_t)prior_stage_fdt_address;
# endif
# ifndef CONFIG_SPL_BUILD
/* Allow the early environment to override the fdt address */
inclusion' below.
-Using binman with OF_BOARD or OF_PRIOR_STAGE
+Using binman with OF_BOARD
--------------------------------------------
Normally binman is used with a board configured with OF_SEPARATE or OF_EMBED.
This is a typical scenario where a device tree source that contains the binman
node is provided in the arch/<arch>/dts directory for a specific board.
-However for a board configured with OF_BOARD or OF_PRIOR_STAGE, no device tree
-blob is provided in the U-Boot build phase hence the binman node information
-is not available. In order to support such use case, a new Kconfig option
-BINMAN_STANDALONE_FDT is introduced, to tell the build system that a standalone
-device tree blob containing binman node is explicitly required.
+However for a board configured with OF_BOARD, no device tree blob is provided
+in the U-Boot build phase hence the binman node information is not available.
+In order to support such use case, a new Kconfig option BINMAN_STANDALONE_FDT
+is introduced, to tell the build system that a standalone device tree blob
+containing binman node is explicitly required.
Note there is a Kconfig option BINMAN_FDT which enables U-Boot run time to
access information about binman entries, stored in the device tree in a binman
available as binman is invoked during the build phase, thus this option is not
turned on by default for these OF_CONTROL methods.
-See qemu-riscv64_spl_defconfig for an example of how binman is used with
-OF_PRIOR_STAGE to generate u-boot.itb image.
-
-
Access to binman entry offsets at run time (symbols)
----------------------------------------------------