On Wed, Apr 20, 2022 at 12:20:43AM +0200, Heinrich Schuchardt wrote: > On 4/19/22 23:54, Simon Glass wrote: > > Hi Heinrich, > > > > On Tue, 19 Apr 2022 at 15:14, Heinrich Schuchardt > > <heinrich.schucha...@canonical.com> wrote: > >> > >> In some scenarios it is desirable to package U-Boot with other files into > >> a single blob. This patch allows to embed a memory disk into the U-Boot > >> binary. This memory disk can be accessed like any other block > >> device as 'mem 0'. > >> > >> Signed-off-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com> > >> --- > >> MAINTAINERS | 6 ++ > >> common/board_r.c | 4 + > >> drivers/Kconfig | 2 + > >> drivers/Makefile | 1 + > >> drivers/block/blk-uclass.c | 2 + > >> drivers/memdisk/Kconfig | 13 ++++ > >> drivers/memdisk/Makefile | 11 +++ > >> drivers/memdisk/memdisk-uclass.c | 22 ++++++ > >> drivers/memdisk/memdisk.c | 128 +++++++++++++++++++++++++++++++ > >> drivers/memdisk/memdisk_file.S | 17 ++++ > >> include/asm-generic/sections.h | 2 + > >> include/blk.h | 1 + > >> include/dm/uclass-id.h | 1 + > >> include/memdisk.h | 28 +++++++ > >> 14 files changed, 238 insertions(+) > >> create mode 100644 drivers/memdisk/Kconfig > >> create mode 100644 drivers/memdisk/Makefile > >> create mode 100644 drivers/memdisk/memdisk-uclass.c > >> create mode 100644 drivers/memdisk/memdisk.c > >> create mode 100644 drivers/memdisk/memdisk_file.S > >> create mode 100644 include/memdisk.h > > > > Can this use binman to create the image and find the memdisk? > > binman requires board specific layout information. I cannot see how binman > would help for a Kconfig option that can be switched on and off for any > board. > > binman may provide addresses in the control device-tree which later could be > relocated. But this seems to result in a larger image size.
This is something analogous to the initrd/initramfs framework within the Linux kernel, yes? -- Tom
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