On 04.03.16 01:10, Alexander Graf wrote: > UEFI defines a simple boot protocol for removable media. There we should look > at the EFI (first GPT FAT) partition and search for /efi/boot/bootXXX.efi with > XXX being different between different platforms (x86, x64, arm, aa64, ...). > > This patch implements a simple version of that protocol for the default distro > boot script. With this we can automatically boot from valid UEFI enabled > removable media. > > Because from all I could see U-Boot by default doesn't deliver device tree > blobs with its firmware, we also need to load the dtb from somewhere. Traverse > the same EFI partition for an fdt file that fits our current board so that > an OS receives a valid device tree when booted automatically. > > Signed-off-by: Alexander Graf <ag...@suse.de> > Reviewed-by: Simon Glass <s...@chromium.org> > --- > include/config_distro_bootcmd.h | 47 > ++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 46 insertions(+), 1 deletion(-) > > diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h > index 37c6b43..c19f1b0 100644 > --- a/include/config_distro_bootcmd.h > +++ b/include/config_distro_bootcmd.h > @@ -90,6 +90,48 @@ > BOOT_TARGET_DEVICES_references_UBIFS_without_CONFIG_CMD_UBIFS > #endif > > +#ifdef CONFIG_EFI_LOADER > +#if defined(CONFIG_ARM64) > +#define BOOTEFI_NAME "bootaa64.efi" > +#elif defined(CONFIG_ARM) > +#define BOOTEFI_NAME "bootarm.efi" > +#endif > +#endif > + > +#ifdef BOOTEFI_NAME > +#define BOOTENV_SHARED_EFI \ > + "boot_efi_binary=" \ > + "load ${devtype} ${devnum}:${distro_bootpart} " \ > + "${kernel_addr_r} efi/boot/"BOOTEFI_NAME"; " \ > + "bootefi ${kernel_addr_r}\0" \ > + \ > + "load_efi_dtb=" \ > + "load ${devtype} ${devnum}:${distro_bootpart} " \ > + "${fdt_addr_r} ${prefix}${fdt_name}; " \ > + "fdt addr ${fdt_addr_r}\0" \ > + \ > + "efi_dtb_prefixes=/ /dtb/ /dtb/current/\0" \ > + "scan_dev_for_efi=" \ > + "for prefix in ${efi_dtb_prefixes}; do " \ > + "if test -e ${devtype} " \ > + "${devnum}:${distro_bootpart} " \ > + "${prefix}${fdt_name}; then " \ > + "run load_efi_dtb; " \ > + "fi;" \ > + "done;" \ > + "if test -e ${devtype} ${devnum}:${distro_bootpart} " \ > + "efi/boot/"BOOTEFI_NAME"; then " \ > + "echo Found EFI removable media binary " \ > + "efi/boot/"BOOTEFI_NAME"; " \ > + "run boot_efi_binary; " \ > + "echo EFI LOAD FAILED: continuing...; " \ > + "fi; "
Whoever applies this, please also apply the patch below on top and squash it in (or tell me to resend). Without the fix, we end up slurping the boot_prefix variable into the scan_dev_for_efi variable. Alex diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h index e7d7002..ad9045e 100644 --- a/include/config_distro_bootcmd.h +++ b/include/config_distro_bootcmd.h @@ -125,7 +125,7 @@ "efi/boot/"BOOTEFI_NAME"; " \ "run boot_efi_binary; " \ "echo EFI LOAD FAILED: continuing...; " \ - "fi; " + "fi; \0" #define SCAN_DEV_FOR_EFI "run scan_dev_for_efi;" #else #define BOOTENV_SHARED_EFI _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot