Merge branch '2022-04-25-initial-implementation-of-stdboot'

To quote the author:
The bootflow feature provide a built-in way for U-Boot to automatically
boot an Operating System without custom scripting and other customisation.
This is called 'standard boot' since it provides a standard way for
U-Boot to boot a distro, without scripting.

It introduces the following concepts:

   - bootdev - a device which can hold a distro
   - bootmeth - a method to scan a bootdev to find bootflows (owned by
                U-Boot)
   - bootflow - a description of how to boot (owned by the distro)

This series provides an implementation of these, enabled to scan for
bootflows from MMC, USB and Ethernet. It supports the existing distro
boot as well as the EFI loader flow (bootefi/bootmgr). It works
similiarly to the existing script-based approach, but is native to
U-Boot.

With this we can boot on a Raspberry Pi 3 with just one command:

   bootflow scan -lb

which means to scan, listing (-l) each bootflow and trying to boot each
one (-b). The final patch shows this.

With a standard way to identify boot devices, booting become easier. It
also should be possible to support U-Boot scripts, for backwards
compatibility only.

...

The design is described in these two documents:

https://drive.google.com/file/d/1ggW0KJpUOR__vBkj3l61L2dav4ZkNC12/view?usp=sharing

https://drive.google.com/file/d/1kTrflO9vvGlKp-ZH_jlgb9TY3WYG6FF9/view?usp=sharing

6 files changed, 8 insertions, 2 deletions

diff --git a/configs/efi-x86_app32_defconfig b/configs/efi-x86_app32_defconfig
index 228643a..7a723c1 100644
--- a/configs/efi-x86_app32_defconfig
+++ b/configs/efi-x86_app32_defconfig
@@ -8,6 +8,7 @@ CONFIG_VENDOR_EFI=y
 CONFIG_TARGET_EFI_APP32=y
 CONFIG_DEBUG_UART=y
 CONFIG_FIT=y
+# CONFIG_BOOTSTD is not set
 CONFIG_SHOW_BOOT_PROGRESS=y
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
diff --git a/configs/efi-x86_app64_defconfig b/configs/efi-x86_app64_defconfig
index 1ed2f13..98f91d8 100644
--- a/configs/efi-x86_app64_defconfig
+++ b/configs/efi-x86_app64_defconfig
@@ -8,6 +8,7 @@ CONFIG_VENDOR_EFI=y
 CONFIG_TARGET_EFI_APP64=y
 CONFIG_DEBUG_UART=y
 CONFIG_FIT=y
+# CONFIG_BOOTSTD is not set
 CONFIG_SHOW_BOOT_PROGRESS=y
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
diff --git a/configs/rcar3_salvator-x_defconfig b/configs/rcar3_salvator-x_defconfig
index f333291..6ef62ab 100644
--- a/configs/rcar3_salvator-x_defconfig
+++ b/configs/rcar3_salvator-x_defconfig
@@ -14,6 +14,7 @@ CONFIG_SYS_LOAD_ADDR=0x58000000
 CONFIG_LTO=y
 CONFIG_REMAKE_ELF=y
 CONFIG_FIT=y
+# CONFIG_BOOTSTD is not set
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_SYS_MONITOR_BASE=0x00000000
 CONFIG_USE_BOOTARGS=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 14d7af4..fe8ea46 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -28,7 +28,7 @@ CONFIG_AUTOBOOT_STOP_STR_CRYPT="$5$rounds=640000$HrpE65IkB8CM5nCL$BKT3QdF98Bo8fJ
 CONFIG_IMAGE_PRE_LOAD=y
 CONFIG_IMAGE_PRE_LOAD_SIG=y
 CONFIG_CONSOLE_RECORD=y
-CONFIG_CONSOLE_RECORD_OUT_SIZE=0x1000
+CONFIG_CONSOLE_RECORD_OUT_SIZE=0x6000
 CONFIG_PRE_CONSOLE_BUFFER=y
 CONFIG_LOG=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
@@ -120,6 +120,7 @@ CONFIG_ENV_IS_IN_EXT4=y
 CONFIG_ENV_EXT4_INTERFACE="host"
 CONFIG_ENV_EXT4_DEVICE_AND_PART="0:0"
 CONFIG_ENV_IMPORT_FDT=y
+# CONFIG_BOOTDEV_ETH is not set
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index ded16af..80a4be4 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -17,7 +17,7 @@ CONFIG_BOOTSTAGE_FDT=y
 CONFIG_BOOTSTAGE_STASH=y
 CONFIG_BOOTSTAGE_STASH_SIZE=0x4096
 CONFIG_CONSOLE_RECORD=y
-CONFIG_CONSOLE_RECORD_OUT_SIZE=0x1000
+CONFIG_CONSOLE_RECORD_OUT_SIZE=0x6000
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y
@@ -72,6 +72,7 @@ CONFIG_ENV_IS_NOWHERE=y
 CONFIG_ENV_IS_IN_EXT4=y
 CONFIG_ENV_EXT4_INTERFACE="host"
 CONFIG_ENV_EXT4_DEVICE_AND_PART="0:0"
+# CONFIG_BOOTDEV_ETH is not set
 CONFIG_BOOTP_SEND_HOSTNAME=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
diff --git a/configs/tbs2910_defconfig b/configs/tbs2910_defconfig
index 60a8160..9f7642f 100644
--- a/configs/tbs2910_defconfig
+++ b/configs/tbs2910_defconfig
@@ -17,6 +17,7 @@ CONFIG_SYS_MEMTEST_END=0x2f400000
 CONFIG_LTO=y
 CONFIG_HAS_BOARD_SIZE_LIMIT=y
 CONFIG_BOARD_SIZE_LIMIT=392192
+# CONFIG_BOOTSTD is not set
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTCOMMAND=y