diff options
| author | Tom Rini <[email protected]> | 2022-07-13 21:31:46 -0400 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2022-07-13 21:31:46 -0400 |
| commit | 854d6de6107bca044db362612f39691f4f5395ca (patch) | |
| tree | 7ccfd331396ba02a8d5a0fd1a77f3f67f80895c0 /doc/usage | |
| parent | 357fa8bb4d40abf411a6cca70f5a2dd6413028ea (diff) | |
| parent | a093d72e628a798238269eb77850d57ee50198bb (diff) | |
Merge tag 'efi-2022-10-rc1' of https://source.denx.de/u-boot/custodians/u-boot-efi
Pull request for efi-2022-10-rc1
Documentation:
* rework the mkimage.1 man-page
* add a statistics page for v2022.07
* update environment description
UEFI:
* add Ilias Apalodimas as co-maintainer
* fix a memory leak in efi_set_bootdev()
* suppress a build warning
Diffstat (limited to 'doc/usage')
| -rw-r--r-- | doc/usage/environment.rst | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/usage/environment.rst b/doc/usage/environment.rst index 28a8952b752..83543f63f6f 100644 --- a/doc/usage/environment.rst +++ b/doc/usage/environment.rst @@ -204,7 +204,9 @@ fdt_high to work it must reside in writable memory, have sufficient padding on the end of it for u-boot to add the information it needs into it, and the memory - must be accessible by the kernel. + must be accessible by the kernel. This usage is strongly discouraged + however as it also stops U-Boot from ensuring the device tree starting + address is properly aligned and a misaligned tree will cause OS failures. fdtcontroladdr if set this is the address of the control flattened @@ -240,14 +242,21 @@ initrd_high memory. In this case U-Boot will NOT COPY the ramdisk at all. This may be useful to reduce the boot time on your system, but requires that this - feature is supported by your Linux kernel. + feature is supported by your Linux kernel. This usage however requires + that the user ensure that there will be no overlap with other parts of the + image such as the Linux kernel BSS. It should not be enabled by default + and only done as part of optimizing a deployment. ipaddr IP address; needed for tftpboot command loadaddr Default load address for commands like "bootp", - "rarpboot", "tftpboot", "loadb" or "diskboot" + "rarpboot", "tftpboot", "loadb" or "diskboot". Note that the optimal + default values here will vary between architectures. On 32bit ARM for + example, some offset from start of memory is used as the Linux kernel + zImage has a self decompressor and it's best if we stay out of where that + will be working. loads_echo see CONFIG_LOADS_ECHO @@ -390,7 +399,6 @@ in U-Boot code. ================= ============== ================ ============== Image File Name RAM Address Flash Location ================= ============== ================ ============== -u-boot u-boot u-boot_addr_r u-boot_addr Linux kernel bootfile kernel_addr_r kernel_addr device tree blob fdtfile fdt_addr_r fdt_addr ramdisk ramdiskfile ramdisk_addr_r ramdisk_addr |