On Sun, Sep 25, 2022 at 12:46:10PM -0400, marty leisner wrote: > I'm running ubuntu 20.04 server (which uses u-boot v2021.01 with minor > changes/enhancements) > > fw_printenv doesn't seem to work -- it always comes up with a crc error (I > haven't tried fw_setenv yet). > > Is there a spec of how the environment works? I haven't seen one. > > Without this patch, I get: > Warning: Bad CRC, using default environment > > The first environment variable has a "0x1" in front of it. > When I apply this patch, things seem to work: > > diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c > index 66cb9d2a..c85b471a 100644 > --- a/tools/env/fw_env.c > +++ b/tools/env/fw_env.c > @@ -1457,8 +1457,8 @@ int fw_env_open(struct env_opts *opts) > goto open_cleanup; > } > > - crc0 = crc32(0, (uint8_t *)environment.data, ENV_SIZE); > - > + crc0 = crc32(0, (uint8_t *) (environment.data + 1) , ENV_SIZE - 1); > > But I'm not at the phase of doing fw_setenv (I would have used a newer > u-boot, but I'm getting resets on bootup (it works > on a vanilla 20.04 system).
Please include your /etc/fw_env.config file and relevant CONFIG_ENV settings from the U-Boot build. -- Tom
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