diff options
| author | Tom Rini <[email protected]> | 2023-08-03 12:43:24 -0400 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2023-08-03 12:43:24 -0400 |
| commit | 6cdd4b8108f57252b8849e71aa46e3a2d227c98d (patch) | |
| tree | 7a1d67347f0fad4eef0a0c95f35dedd866e714aa /doc/develop/spl.rst | |
| parent | 8b572a387ea907452b4269f9ec9f8321229bd8ec (diff) | |
| parent | cd87d2c61ce8e8e963de514f2c8ab0f959d6b586 (diff) | |
Merge tag 'efi-2023-10-rc2-2' of https://source.denx.de/u-boot/custodians/u-boot-efi
Pull request efi-2023-10-rc2-2
Documentation:
* Move README.falcon to HTML
* Describe usage of QEMU virtio block device
* Add SPDX license identifiers to svg images
* Add more detail to the description of U-Boot boot phases
UEFI:
* Fix buffer overflows
* Fix memory leak in efi_add_memory_map_pg
* Properly check return values of calloc, uuid_str_to_bin,
efi_parse_pkcs7_header
Diffstat (limited to 'doc/develop/spl.rst')
| -rw-r--r-- | doc/develop/spl.rst | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/doc/develop/spl.rst b/doc/develop/spl.rst index a1515a7b43b..76e87f07c72 100644 --- a/doc/develop/spl.rst +++ b/doc/develop/spl.rst @@ -77,10 +77,11 @@ To check whether a feature is enabled, use CONFIG_IS_ENABLED():: This checks CONFIG_CLK for the main build, CONFIG_SPL_CLK for the SPL build, CONFIG_TPL_CLK for the TPL build, etc. -U-Boot Phases -------------- +U-Boot Boot Phases +------------------ -U-Boot boots through the following phases: +U-Boot goes through the following boot phases where TPL, VPL, SPL are optional. +While many boards use SPL, less use TPL. TPL Very early init, as tiny as possible. This loads SPL (or VPL if enabled). @@ -97,6 +98,12 @@ SPL U-Boot U-Boot proper, containing the command line and boot logic. +Further usages of U-Boot SPL comprise: + +* Launching BL31 of ARM Trusted Firmware which invokes main U-Boot as BL33 +* launching EDK II +* launching Linux kernel +* launching RISC-V OpenSBI which invokes main U-Boot Checking the boot phase ----------------------- |