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author | Tom Rini <trini@konsulko.com> | 2023-07-10 21:29:14 +0300 |
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committer | Tom Rini <trini@konsulko.com> | 2023-07-10 21:29:14 +0300 |
commit | 146a82c017d51eb2c3b8be33854f200f1e52a1cb (patch) | |
tree | c2bb134d105bcc9855e6c39ac5b422e5416735ff /doc/board/xen/xenguest_arm64.rst | |
parent | 05aa6516c6bb419d01d69fac457c0de563bfd694 (diff) | |
parent | 76c61f29d63163d178b1584ecc9fc2c96c538ff0 (diff) | |
download | u-boot-146a82c017d51eb2c3b8be33854f200f1e52a1cb.tar.xz |
Merge branch 'next'
Diffstat (limited to 'doc/board/xen/xenguest_arm64.rst')
-rw-r--r-- | doc/board/xen/xenguest_arm64.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/doc/board/xen/xenguest_arm64.rst b/doc/board/xen/xenguest_arm64.rst index 1327f88f99..e9bdaf7ffb 100644 --- a/doc/board/xen/xenguest_arm64.rst +++ b/doc/board/xen/xenguest_arm64.rst @@ -6,7 +6,7 @@ Xen guest ARM64 board This board specification ------------------------ -This board is to be run as a virtual Xen [1] guest with U-boot as its primary +This board is to be run as a virtual Xen [1] guest with U-Boot as its primary bootloader. Xen is a type 1 hypervisor that allows multiple operating systems to run simultaneously on a single physical server. Xen is capable of running virtual machines in both full virtualization and para-virtualization (PV) @@ -16,7 +16,7 @@ Paravirtualized drivers are a special type of device drivers that are used in a guest system in the Xen domain and perform I/O operations using a special interface provided by the virtualization system and the host system. -Xen support for U-boot is implemented by introducing a new Xen guest ARM64 +Xen support for U-Boot is implemented by introducing a new Xen guest ARM64 board and porting essential drivers from MiniOS [3] as well as some of the work previously done by NXP [4]: @@ -39,7 +39,7 @@ previously done by NXP [4]: Board limitations ----------------- -1. U-boot runs without MMU enabled at the early stages. +1. U-Boot runs without MMU enabled at the early stages. According to Xen on ARM ABI (xen/include/public/arch-arm.h): all memory which is shared with other entities in the system (including the hypervisor and other guests) must reside in memory which is mapped as Normal Inner @@ -54,14 +54,14 @@ Board limitations 2. No serial console until MMU is up. Because data cache maintenance is required until the MMU setup the early/debug serial console is not implemented. Therefore, we do not have - usual prints like U-boot’s banner etc. until the serial driver is + usual prints like U-Boot’s banner etc. until the serial driver is initialized. 3. Single RAM bank supported. If a Xen guest is given much memory it is possible that Xen allocates two memory banks for it. The first one is allocated under 4GB address space and in some cases may represent the whole guest’s memory. It is assumed that - U-boot most likely won’t require high memory bank for its work andlaunching + U-Boot most likely won’t require high memory bank for its work andlaunching OS, so it is enough to take the first one. |