October 2021 - U-Boot

IMX8M OP-TEE
by Tim Harvey 21 Oct '21

21 Oct '21

Greetings, Is anyone successfully booting U-Boot with OP-TEE support on the IMX8M? My understanding is that you need to add tee.bin to the images in the FIT image and include it in loadables following the ATF. While this was done with arch/arm/mach-imx/mkimage_fit_atf.sh before the switch to binman by simply having tee.bin in the U-Boot directory and passing in TEE_LOAD_ADDR (or accepting the default of 0xfe000000) once you switch to binman it needs to be added for your board. Additionally in order to use OP-TEE from U-Boot (ie for dek_blob command) you need to add a node with compatible=linaro,optee-tz as well. I've done the following to add OP-TEE for imx8mm_venice: diff --git a/configs/imx8mm_venice_defconfig b/configs/imx8mm_venice_defconfig index d85827b588..85d2b20810 100644 -u-boot.dtsi index e0fa9ff4bf..7a71b974e1 100644 --- a/arch/arm/dts/imx8mm-venice-u-boot.dtsi +++ b/arch/arm/dts/imx8mm-venice-u-boot.dtsi @@ -10,6 +10,13 @@ multiple-images; }; + firmware { + optee { + compatible = "linaro,optee-tz"; + method = "smc"; + }; + }; + wdt-reboot { compatible = "wdt-reboot"; wdt = <&wdog1>; @@ -152,6 +159,16 @@ }; }; + tee { + description = "TEE firmware"; + type = "firmware"; + arch = "arm64"; + compression = "none"; + data = "tee.bin"; + load = <0xbe000000>; + entry = <0xbe000000>; + }; + @fdt-SEQ { description = "NAME"; type = "flat_dt"; @@ -165,7 +182,7 @@ @config-SEQ { description = "NAME"; firmware = "uboot"; - loadables = "atf"; + loadables = "atf", "tee"; fdt = "fdt-SEQ"; }; }; However, when I attempt to boot I hang when the ATF is run. Where does the TEE_LOAD_ADDR come from specifically? I would think this needs to be defined when building tee and needs to match the load address used in the FIT image. It appears that perhaps this is supped to be DDR_BASE + DDR_SIZE - 32MIB but I'm not entirely sure. I'm currently using NXP's ATF (imx_5.4.3_2.0.0) and NXP's TEE (imx_5.4.70_2.3.0) and would also like to understand if NXP's branches are strictly required here and if so what the pros and cons of using them are. Anyone using IMX8MM OP-TEE that could point me in the right direction? Best regards, Tim

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[PATCH v2 0/5] board: toradex: prepare and add colibri imx6ull 1gb (emmc) support
by Marcel Ziswiler 20 Oct '21

20 Oct '21

From: Marcel Ziswiler <marcel.ziswiler(a)toradex.com> Some preparatory steps concerning tdx-cfg-block including a fix for the interactive mode IT handling and adding them new SKUs and then adding initial support for the Toradex Colibri iMX6ULL 1GB (eMMC) V1.1A module. They are now strapped to boot from eFuses which are factory fused to properly boot from their on-module eMMC. Functionality wise the following is known to be working: - 4-bit MMC/SD card slot - 8-bit eMMC (fused default boot) - bmode usb (imx_usb or uuu e.g. as used by the Toradex Easy Installer) - Ethernet - GPIOs - I2C - parallel RGB display - USB device (e.g. for ums) - USB host (e.g. for storage devices) U-Boot 2021.10-rc1-00128-g4877bdab7e6 (Aug 16 2021 - 13:59:21 +0200) CPU: Freescale i.MX6ULL rev1.1 792 MHz (running at 396 MHz) CPU: Industrial temperature grade (-40C to 105C) at 59C Reset cause: WDOG DRAM: 1 GiB MMC: FSL_SDHC: 1, FSL_SDHC: 0 Loading Environment from MMC... OK In: serial Out: serial Err: serial Model: Toradex Colibri iMX6ULL 1GB IT (eMMC) V1.1A, Serial# 06906494 Net: eth1: ethernet@20b4000 Hit any key to stop autoboot: 0 Colibri iMX6ULL # Changes in v2: - Re-based. Denys Drozdov (1): toradex: configblock: fix interactive mode it handling Marcel Ziswiler (2): toradex: take over maintainership toradex: tdx-cfg-block: add new i.mx 6ull and 8m plus skus Max Krummenacher (1): colibri-imx6ull: add emmc variant Philippe Schenker (1): colibri-imx6ull: imximage.cfg: integrate new 1GiB RAM variant arch/arm/dts/Makefile | 1 + arch/arm/dts/imx6ull-colibri-emmc.dts | 49 +++++++++++ arch/arm/dts/imx6ull-colibri.dts | 34 ++++++- arch/arm/dts/imx6ull-colibri.dtsi | 32 +------ board/toradex/apalis-imx8x/MAINTAINERS | 2 +- board/toradex/apalis_imx6/MAINTAINERS | 2 +- board/toradex/colibri-imx6ull/Kconfig | 48 +++++++++- board/toradex/colibri-imx6ull/MAINTAINERS | 6 +- .../toradex/colibri-imx6ull/colibri-imx6ull.c | 29 +++++- board/toradex/colibri-imx6ull/imximage.cfg | 13 ++- board/toradex/colibri_imx6/MAINTAINERS | 2 +- board/toradex/colibri_imx7/MAINTAINERS | 2 +- board/toradex/colibri_t20/MAINTAINERS | 2 +- board/toradex/colibri_t30/MAINTAINERS | 2 +- board/toradex/colibri_vf/MAINTAINERS | 2 +- board/toradex/common/tdx-cfg-block.c | 34 +++++-- board/toradex/common/tdx-cfg-block.h | 5 ++ board/toradex/verdin-imx8mm/MAINTAINERS | 2 +- configs/colibri-imx6ull-emmc_defconfig | 88 +++++++++++++++++++ configs/colibri-imx6ull_defconfig | 2 +- include/configs/colibri-imx6ull.h | 53 ++++++++--- 21 files changed, 339 insertions(+), 71 deletions(-) create mode 100644 arch/arm/dts/imx6ull-colibri-emmc.dts create mode 100644 configs/colibri-imx6ull-emmc_defconfig -- 2.26.2

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[PATCH v5] imx8mm-evk: Generate a single bootable flash.bin again
by Fabio Estevam 20 Oct '21

20 Oct '21

After the conversion to binman in commit 8996e6b7c6a1 ("imx8mm_evk: switch to use binman to pack images"), it is necessary to flash both flash.bin and u-boot.itb to get a bootable system. Prior to this commit, only flash.bin was needed. Such new requirement breaks existing distro mechanisms to generate the final binary because the extra u-boot.itb is now required. Generate a final flash.bin that can be used again as a single bootable binary to keep the original behavior. After this change the SPL binary is called spl.bin, which is a more descriptive name for its purpose, and can still be used standalone (for example, for secure boot purposes). Also update imx8mm_evk.rst to remove the u-boot.itb copy step. Signed-off-by: Fabio Estevam <festevam(a)denx.de> Reviewed-by: Frieder Schrempf <frieder.schrempf(a)kontron.de> Reviewed-by: Heiko Schocher <hs(a)denx.de> Reviewed-by: Marcel Ziswiler <marcel.ziswiler(a)toradex.com> --- Changes since v4: - Pass filename = "spl.bin"; to the spl node. (Heiko/Marcel) arch/arm/dts/imx8mm-evk-u-boot.dtsi | 19 ++++++++++++++++++- .../imx8mm_evk/imximage-8mm-lpddr4.cfg | 2 +- doc/board/freescale/imx8mm_evk.rst | 1 - 3 files changed, 19 insertions(+), 3 deletions(-) diff --git a/arch/arm/dts/imx8mm-evk-u-boot.dtsi b/arch/arm/dts/imx8mm-evk-u-boot.dtsi index f200afac9f..3c75415e8f 100644 --- a/arch/arm/dts/imx8mm-evk-u-boot.dtsi +++ b/arch/arm/dts/imx8mm-evk-u-boot.dtsi @@ -150,7 +150,9 @@ }; - flash { + spl { + filename = "spl.bin"; + mkimage { args = "-n spl/u-boot-spl.cfgout -T imx8mimage -e 0x7e1000"; @@ -217,4 +219,19 @@ }; }; }; + + imx-boot { + filename = "flash.bin"; + pad-byte = <0x00>; + + spl: blob-ext@1 { + offset = <0x0>; + filename = "spl.bin"; + }; + + uboot: blob-ext@2 { + offset = <0x57c00>; + filename = "u-boot.itb"; + }; + }; }; diff --git a/board/freescale/imx8mm_evk/imximage-8mm-lpddr4.cfg b/board/freescale/imx8mm_evk/imximage-8mm-lpddr4.cfg index b89092a559..90573be5fd 100644 --- a/board/freescale/imx8mm_evk/imximage-8mm-lpddr4.cfg +++ b/board/freescale/imx8mm_evk/imximage-8mm-lpddr4.cfg @@ -6,4 +6,4 @@ #define __ASSEMBLY__ BOOT_FROM sd -LOADER mkimage.flash.mkimage 0x7E1000 +LOADER u-boot-spl-ddr.bin 0x7E1000 diff --git a/doc/board/freescale/imx8mm_evk.rst b/doc/board/freescale/imx8mm_evk.rst index 7fd3d72564..b377c4de27 100644 --- a/doc/board/freescale/imx8mm_evk.rst +++ b/doc/board/freescale/imx8mm_evk.rst @@ -50,7 +50,6 @@ Burn the flash.bin to MicroSD card offset 33KB: .. code-block:: bash $sudo dd if=flash.bin of=/dev/sd[x] bs=1024 seek=33 conv=notrunc - $sudo dd if=u-boot.itb of=/dev/sdc bs=1024 seek=384 conv=sync Boot ---- -- 2.25.1

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[PATCH] colibri-imx6ull: fix setup of nand gpmi clock
by Philippe Schenker 20 Oct '21

20 Oct '21

NXP used to setup the gpmi clock root from gpmi_clk in early versions in their downstream BSP. [1] However on mainline the gpmi clock root was always setup from enfc since the beginning of the i.MX 6 series SoCs, which is still the same today. [2] NXP followed the mainline approach at some point and changed setup_gpmi_io_clk to setup gpmi clock root from enfc which left faulty code behind in our board file. [3] This commit follows the change of NXP as it improves the performance of the NAND from ~1.2 MiB/s to ~12 MiB/s. [3] This change was verified to work in recovery-mode and u-boot loaded from NAND on all four Colibri iMX6ULL SKUs from Toradex. The frequency used to read the NAND, measured on RE# (Read Enable): before this patch: 1.4 MHz after this patch: 22 MHz in Linux Kernel: 50 MHz [1] https://source.codeaurora.org/external/imx/uboot-imx/tree/arch/arm/cpu/armv… [2] commit 23608e23fd65 ("i.mx: add the initial support for freescale i.MX6Q processor") [3] https://source.codeaurora.org/external/imx/uboot-imx/commit/?id=7a82a19ceab… Signed-off-by: Philippe Schenker <philippe.schenker(a)toradex.com> --- board/toradex/colibri-imx6ull/colibri-imx6ull.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/board/toradex/colibri-imx6ull/colibri-imx6ull.c b/board/toradex/colibri-imx6ull/colibri-imx6ull.c index 01f5561596..fd54688272 100644 --- a/board/toradex/colibri-imx6ull/colibri-imx6ull.c +++ b/board/toradex/colibri-imx6ull/colibri-imx6ull.c @@ -53,8 +53,9 @@ int dram_init(void) #ifdef CONFIG_NAND_MXS static void setup_gpmi_nand(void) { - setup_gpmi_io_clk((3 << MXC_CCM_CSCDR1_BCH_PODF_OFFSET) | - (3 << MXC_CCM_CSCDR1_GPMI_PODF_OFFSET)); + setup_gpmi_io_clk((MXC_CCM_CS2CDR_ENFC_CLK_PODF(0) | + MXC_CCM_CS2CDR_ENFC_CLK_PRED(3) | + MXC_CCM_CS2CDR_ENFC_CLK_SEL(3))); } #endif /* CONFIG_NAND_MXS */ -- 2.33.0

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[PATCH 1/2] doc: imx: psb: Fix PERSIST_SECONDARY_BOOT bit location in GPR10
by Marek Vasut 20 Oct '21

20 Oct '21

The PERSIST_SECONDARY_BOOT is in GPR10 address 0x30390098, adjust the text which currently says it is in GPR0 while using the correct address of GPR10. Signed-off-by: Marek Vasut <marex(a)denx.de> Cc: Marcel Ziswiler <marcel.ziswiler(a)toradex.com> Cc: Peng Fan <peng.fan(a)nxp.com> Cc: Stefano Babic <sbabic(a)denx.de> Cc: Ye Li <ye.li(a)nxp.com> Cc: uboot-imx <uboot-imx(a)nxp.com> --- doc/imx/misc/psb.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/imx/misc/psb.rst b/doc/imx/misc/psb.rst index 71ac09fac8d..3533c916405 100644 --- a/doc/imx/misc/psb.rst +++ b/doc/imx/misc/psb.rst @@ -159,7 +159,7 @@ WARM reset into B-copy using WDT ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ To perform a reboot into B-copy, the PERSIST_SECONDARY_BOOT must be set -in SRC_GPR0 register. Example on iMX8MM:: +in SRC_GPR10 register. Example on iMX8MM:: => mw 0x30390098 0x40000000 -- 2.30.2

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[PATCH 0/9] phyCORE-i.MX8MM Updates
by Teresa Remmet 20 Oct '21

20 Oct '21

This patchstack contains mainly cleanup for phyCORE-i.MX8MM but also adds: * SPI NOR flash support * clk command * binman support Teresa Teresa Remmet (9): board: phytec: phycore_imx8mm: Clean up spl include: configs: phycore_imx8mm: Remove hard coded network settings include: configs: phycore-imx8mm: Remove not needed defines include: configs: phycore-imx8mm: Do not use macro for address arm: dts: phycore-imx8mm-u-boot: Add wdog pinctrl entry arm: dts: phycore-imx8mm: Fix property board: phytec: phycore-imx8mm: Add SPI-NOR flash support configs: phycore-imx8mm_defconfig: Enable clk command board: phytec: imx8mm-phycore: Switch to binman arch/arm/dts/phycore-imx8mm-u-boot.dtsi | 126 ++++++++++++++++++ arch/arm/dts/phycore-imx8mm.dts | 30 ++++- arch/arm/mach-imx/imx8m/Kconfig | 1 + board/phytec/phycore_imx8mm/Kconfig | 2 +- .../phytec/phycore_imx8mm/imximage-8mm-sd.cfg | 9 ++ board/phytec/phycore_imx8mm/spl.c | 19 +-- configs/phycore-imx8mm_defconfig | 22 ++- include/configs/phycore_imx8mm.h | 18 +-- 8 files changed, 191 insertions(+), 36 deletions(-) create mode 100644 board/phytec/phycore_imx8mm/imximage-8mm-sd.cfg -- 2.25.1

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[PATCH v6 00/11] board: toradex: verdin-imx8mm: target refresh
by Marcel Ziswiler 20 Oct '21

20 Oct '21

From: Marcel Ziswiler <marcel.ziswiler(a)toradex.com> An assortment of fixes and improvements like an Ethernet PHY configuration fix, DEK blob encapsulation preparation, migration to using binman to pack images, SLEEP_MOCI# enablement, dropping of V1.0 hardware support [1], renaming kernel image variable, using preboot for fdtfile evaluation and watchdog pinctrl fix. Note that this series is applied on top of Peng's Makefile fix [2] as otherwise, it may not quite generate all binman artefacts in the right order as discussed here [3]. [1] https://developer.toradex.com/verdin-sample-phase-over [2] https://marc.info/?l=u-boot&m=162908373904742 [3] https://marc.info/?l=u-boot&m=162945614207220 Changes in v6: - New patch re-ordering fdt nodes and properties. - Update commit message as requested by Wolfgang. Changes in v5: - Drop device tree part already done by Marek's patch. - Add another fixes tag as his patch forgot the board code part. - Re-based on top of u-boot-imx, master yet again. Changes in v4: - Add Heiko Schocher's reviewed-by tag. - Fix copyright periods. - Re-based. Changes in v3: - Case fold hex string. - Revert binman part of imx8mm-verdin-u-boot.dtsi to a plain copy from imx8mm-evk and postpone further improvements to after migrating to a common binman config as agreed with Frieder and Simon. - New patch cleaning up include order. - Add Fabio's reviewed-by tag. - Fix patch. - Add missing apalis-imx8 part. - While at it update copyright year resp. period. - Fix closing endif comment. Changes in v2: - Explicitly pass filename to binman when generating binaries as suggested by Heiko. - Use proper intermediate binary u-boot-spl-ddr.bin for imximage as pointed out by Heiko. - Drop first patch ("imx: mkimage_fit_atf: fix legacy image generation") as a similar fix was already refused earlier. - New patch allows booting recent embedded Linux BSPs. - New patch addressing dynamic fdtfile definition. - New patch fixing watchdog pinctrl issue. Igor Opaniuk (1): verdin-imx8mm: use preboot for fdtfile evaluation Marcel Ziswiler (7): imx8m: clean-up kconfig indentation verdin-imx8mm: fix ethernet ARM: dts: imx8mm-verdin: prepare for dek blob encapsulation arm64: dts: imx8mm-verdin-u-boot.dtsi: alphabetically re-order verdin-imx8mm: switch to use binman to pack images verdin-imx8mm: clean-up include order verdin-imx8mm: fix watchdog pinctrl issue Max Krummenacher (2): verdin-imx8mm: enable sleep_moci output verdin-imx8mm: drop support for v1.0 hardware Oleksandr Suvorov (1): include/configs: apalis-imx8/verdin-imx8mm: rename kernel image variable arch/arm/dts/imx8mm-verdin-u-boot.dtsi | 147 +++++++++++++++++++- arch/arm/dts/imx8mm-verdin.dts | 18 +++ arch/arm/mach-imx/imx8m/Kconfig | 21 +-- board/toradex/verdin-imx8mm/imximage.cfg | 11 +- board/toradex/verdin-imx8mm/verdin-imx8mm.c | 81 +---------- configs/verdin-imx8mm_defconfig | 6 +- doc/board/toradex/verdin-imx8mm.rst | 53 ++++--- include/configs/apalis-imx8.h | 6 +- include/configs/verdin-imx8mm.h | 10 +- 9 files changed, 220 insertions(+), 133 deletions(-) -- 2.26.2

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[PATCH] ARM: amlogic: add sm efuse write support and cmd for read/write efuse
by Vyacheslav Bocharov 20 Oct '21

20 Oct '21

This adds support for amlogic efuse write and provides two subcommands of "sm" command: "efuseread" and "efusewrite" to read/write bytes between memory and efuse. Signed-off-by: Vyacheslav Bocharov <adeep(a)lexina.in> --- arch/arm/mach-meson/sm.c | 68 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 67 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-meson/sm.c b/arch/arm/mach-meson/sm.c index 1a8f23cb1fa..fb437b94d14 100644 --- a/arch/arm/mach-meson/sm.c +++ b/arch/arm/mach-meson/sm.c @@ -68,6 +68,26 @@ ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size) return regs.regs[0]; } +ssize_t meson_sm_write_efuse(uintptr_t offset, void *buffer, size_t size) +{ + struct pt_regs regs; + + meson_init_shmem(); + + memcpy(shmem_input, buffer, size); + + regs.regs[0] = FN_EFUSE_WRITE; + regs.regs[1] = offset; + regs.regs[2] = size; + + smc_call(&regs); + + if (regs.regs[0] == 0) + return -1; + + return 0; +} + #define SM_CHIP_ID_LENGTH 119 #define SM_CHIP_ID_OFFSET 4 #define SM_CHIP_ID_SIZE 12 @@ -187,9 +207,53 @@ static int do_sm_reboot_reason(struct cmd_tbl *cmdtp, int flag, int argc, return CMD_RET_SUCCESS; } +static int do_efuse_read(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + ulong address, offset, size; + int ret; + + if (argc < 4) + return CMD_RET_USAGE; + + offset = simple_strtoul(argv[1], NULL, 0); + size = simple_strtoul(argv[2], NULL, 0); + + address = simple_strtoul(argv[3], NULL, 0); + + ret = meson_sm_read_efuse(offset, (void *)address, size); + if (ret) + return CMD_RET_FAILURE; + + return CMD_RET_SUCCESS; +} + +static int do_efuse_write(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + ulong address, offset, size; + int ret; + + if (argc < 4) + return CMD_RET_USAGE; + + offset = simple_strtoul(argv[1], NULL, 0); + size = simple_strtoul(argv[2], NULL, 0); + + address = simple_strtoul(argv[3], NULL, 0); + + ret = meson_sm_write_efuse(offset, (void *)address, size); + if (ret) + return CMD_RET_FAILURE; + + return CMD_RET_SUCCESS; +} + static struct cmd_tbl cmd_sm_sub[] = { U_BOOT_CMD_MKENT(serial, 2, 1, do_sm_serial, "", ""), U_BOOT_CMD_MKENT(reboot_reason, 1, 1, do_sm_reboot_reason, "", ""), + U_BOOT_CMD_MKENT(efuseread, 4, 1, do_efuse_read, "", ""), + U_BOOT_CMD_MKENT(efusewrite, 4, 0, do_efuse_write, "", ""), }; static int do_sm(struct cmd_tbl *cmdtp, int flag, int argc, @@ -216,5 +280,7 @@ U_BOOT_CMD( sm, 5, 0, do_sm, "Secure Monitor Control", "serial <address> - read chip unique id to memory address\n" - "sm reboot_reason [name] - get reboot reason and store to to environment" + "sm reboot_reason [name] - get reboot reason and store to to environment\n" + "sm efuseread <offset> <size> <address> - read efuse to memory address\n" + "sm efusewrite <offset> <size> <address> - write into efuse from memory address" ); -- 2.30.2

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buildman stops (crashed) on current master
by Stefano Babic 20 Oct '21

20 Oct '21

Hi all, CI stops by building aarch64 without notice, for reference: https://source.denx.de/u-boot/custodians/u-boot-imx/-/jobs/332319 There is no error, just process is killed. It looks like it stops at xilinx_zynqmp_virt, ./tools/buildman/buildman -o /tmp -P -E -W aarch64but board can be built without issues. If I build on my host (not in docker, anyway), it generally builds fine - but it crashes sometimes, too. On gitlab instance , it crashes. Issue does not seem that depends on merged patches, and introduces boards were already built successfully. Any hint ? I have also no idea what I should look as what I see is just "usr/bin/bash: line 104: 24 Killed ./tools/buildman/buildman -o /tmp -P -E -W aarch64" Regards, Stefano -- ===================================================================== DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic(a)denx.de =====================================================================

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[PATCH 1/3] smegw01: Pass 'mmcpart' to the kernel command line
by Fabio Estevam 20 Oct '21

20 Oct '21

When using SWUpdate, it is necessary to toggle between partitions. Use the 'mmcpart' environment variable to accomplish that. Signed-off-by: Fabio Estevam <festevam(a)denx.de> --- include/configs/smegw01.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/include/configs/smegw01.h b/include/configs/smegw01.h index 6f7b46e49b..e66047acbd 100644 --- a/include/configs/smegw01.h +++ b/include/configs/smegw01.h @@ -29,9 +29,8 @@ "bootm_size=0x10000000\0" \ "mmcdev=0\0" \ "mmcpart=1\0" \ - "mmcroot=/dev/mmcblk0p1 rootwait rw\0" \ "mmcargs=setenv bootargs console=${console},${baudrate} " \ - "root=${mmcroot}\0" \ + "root=/dev/mmcblk0p${mmcpart} rootwait rw\0" \ "loadimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} boot/${image}\0" \ "loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdt_addr} boot/${fdtfile}\0" \ "mmcboot=echo Booting from mmc ...; " \ -- 2.25.1

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