Its not a beagle board but just regular uboot functionality I am trying to
understand.
I have this uboot
VERSION = 2017
PATCHLEVEL = 03
I am trying to silent the console using the silent variable.I defined this
`#define CONFIG_SILENT_CONSOLE`
So at boot time I am interrupting the console, and entering
setenv silent 1
save
reset
Now after reset, or power on reset I try again get console logs.After
seeing env variables
printenv
I see my saved variable correctly in env varibles
silent=1
but still u-boot is not silent. I suspect this function is failing at
checking for this env variable,
char *getenv(const char *name)
{
if (gd->flags & GD_FLG_ENV_READY) { /* after import into hashtable */
ENTRY e, *ep;
WATCHDOG_RESET();
e.key = name;
e.data = NULL;
hsearch_r(e, FIND, &ep, &env_htab, 0); /*this function is maybe
returning*/
return ep ? ep->data : NULL;
}
/* restricted capabilities before import */
if (getenv_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
return (char *)(gd->env_buf);
return NULL;
}
But what exactly is happening?
Is there something like before relocation time env variables and after
relocation env variables because the function,
static void console_update_silent(void)
{
#ifdef CONFIG_SILENT_CONSOLE
if (getenv("silent") != NULL){
puts("silent");
gd->flags |= GD_FLG_SILENT;
}
else{
puts("Non silent");
gd->flags &= ~GD_FLG_SILENT;
}
#endif
}
/* Called before relocation - use serial functions */
int console_init_f(void)
{
gd->have_console = 1;
console_update_silent();
print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
return 0;
}
`console_init_f` says its before relocation.
I have put some prints to see and always gets non silent, even if I have
saved the silent variable,
I am using a sd card to boot(mmc), I don't have any debugger, so I
I tried printing default environment, as
env print default
## Error: "default" not defined
So there is not default environment too.
Any tips or help will make me understand.
P.S.
I explicitly defined silent in `#define CONFIG_EXTRA_ENV_SETTINGS`
Now u-boot is silent, but I don't see this env variable on doing `printenv`
Doing a `setenv silent` should remove this from env variable but still on
reboot my uboot is silent. So something about environment variable is
clearly mystery to me.
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