U-boot does not silence its output

[Mrigendra Chaubey]

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.