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| author | Sumit Garg <sumit.garg@linaro.org> | 2018-11-26 14:20:17 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-12-12 20:14:21 +0300 |
| commit | 03fb0958c9090eb3add089cb9f5a8a5ecb30ddf6 (patch) | |
| tree | 3094c913aa257de5fa0dca1b2fb1b079b357eab5 /doc | |
| parent | 5266db16eeba3318e2d0a6e27eb91c0b494d0de4 (diff) | |
| download | u-boot-03fb0958c9090eb3add089cb9f5a8a5ecb30ddf6.tar.xz | |
qemu-arm: Add persistent environment support
Currently on qemu-arm platforms environment is kept in RAM. Instead
use pflash device 1 to provide persistent environment support across
device reset.
Also (optionally) provide support for persistent environment across
qemu machine OFF/ON using following instructions:
- Create envstore.img using qemu-img:
qemu-img create -f raw envstore.img 64M
- Add a pflash drive parameter to the command line:
-drive if=pflash,format=raw,index=1,file=envstore.img
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.qemu-arm | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/README.qemu-arm b/doc/README.qemu-arm index 260165638a..e67bc13f70 100644 --- a/doc/README.qemu-arm +++ b/doc/README.qemu-arm @@ -47,6 +47,12 @@ The minimal QEMU command line to get U-Boot up and running is: Note that for some odd reason qemu-system-aarch64 needs to be explicitly told to use a 64-bit CPU or it will boot in 32-bit mode. +Additional persistent U-boot environment support can be added as follows: +- Create envstore.img using qemu-img: + qemu-img create -f raw envstore.img 64M +- Add a pflash drive parameter to the command line: + -drive if=pflash,format=raw,index=1,file=envstore.img + Additional peripherals that have been tested to work in both U-Boot and Linux can be enabled with the following command line parameters: |