WARNING:Caches not enabled

Hi,

The device might have caches like Ichche, DCache etc this might by

disabled in the config. due to which you are seeing the warning.

AFAIK its not a problem. Do you want to enable them for any reason ?

Thx,

--Prabhakar Lad

Hi Prabhakar,

I wanted to know why this [ NAND read from offset failed is coming and Warning - readenv() failed, using default environment ]  come up and how to over come it.

NAND read from offset 3c0000 failed -74
*** Warning - readenv() failed, using default environment

Hi,

The warning being printed for first time since there is no environment. So when

the board comes up do a saveenv and then reset, than that warning should disappear.

Try and see if saveenv works for you.

When i checked out the latest code i found some issues which i fixed it. Attached is

the image.

Thx,

--Prabhakar Lad

Hi,

I tried that out, when i did saveenv i got this. after that i did a reset also,

I have put that log and highlighted what happened after i did a saveenv

Here we load the ubl and u-boot serially for nand, using UART. 

Booting Catalog Boot Loader
BootMode = NAND
Starting NAND Copy...
Valid magicnum, 0xA1ACED66, found in block 0x00000019.
   DONE
Jumping to entry point at 0x81080000.
 
 
U-Boot 2012.07 (Sep 05 2012 - 15:37:40)
 
I2C:   ready
DRAM:  64 MiB
WARNING: Caches not enabled
NAND:  256 MiB
MMC:   davinci: 0, davinci: 1
NAND read from offset 3c0000 failed -74
*** Warning - readenv() failed, using default environment
 
Net:   dm9000
Hit any key to stop autoboot:  5 4 0  
DM355 EVM # saveenv
Saving Environment to NAND...
Erasing Nand...
 
nand0: MTD Erase failure: -5
 
nand0: MTD Erase failure: -5
 
Writing to Nand... nand_do_write_ops: Device is write protected
FAILED!
DM355 EVM #

Hi,

Can u tell me how to enable  caches, i am new to this u-boot.

Hi,

can you apply this patch and test http://www.mail-archive.com/u-boot@lists.denx.de/msg92783.html

This patch doesnt enable Caches. there is some issue in saveenv cmd.

Thx,

--Prabhakar Lad

Hi,

The code goes like this,

this line does not exist (in common/env_nand.c) -->  ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, sizeof(env_t));

int saveenv(void)
{
    int ret = 0;
    env_t   env_new;
    ssize_t len;
    char    *res;
    nand_erase_options_t nand_erase_options;

    memset(&nand_erase_options, 0, sizeof(nand_erase_options));
    nand_erase_options.length = CONFIG_ENV_RANGE;
    nand_erase_options.offset = CONFIG_ENV_OFFSET;
    
    if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
        return 1;

.

.

.

And why does read form NAND fail only at that particular location ?
 

Hi,

There are two saveenv() function in that file you probably looked at other one.

As I said earlier for the first time it fails becoz there is no environment once you do

a saveenv and do a reset it wont fail.

Thx,

--Prabhakar Lad

Hi,

 when a saveenv is done this happens. 

Net:   dm9000
Hit any key to stop autoboot:  5 4 0  
DM355 EVM # saveenv
Saving Environment to NAND...
Erasing Nand...
 
nand0: MTD Erase failure: -5
 
nand0: MTD Erase failure: -5
 
Writing to Nand... nand_do_write_ops: Device is write protected
FAILED!

when i do a reset even then i get

NAND read from offset 3c0000 failed -74
*** Warning - readenv() failed, using default environment

And as far as the code goes i checked both saveenv functions in ( common/env_nand.c ).

This line ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, sizeof(env_t)); does not exists. Am using u-boot-2012.07 from ( ftp://ftp.denx.de/pub/u-boot/ )

Here are  the two functions, ( CONFIG_CMD_SAVEENV and also  CONFIG_CMD_MTDPARTS has been defined in include/config_cmd_default.h)

#ifdef CONFIG_ENV_OFFSET_REDUND
static unsigned char env_flags;

int saveenv(void)
{
    env_t   env_new;
    ssize_t len;
    char    *res;
    int ret = 0;
    nand_erase_options_t nand_erase_options;

    memset(&nand_erase_options, 0, sizeof(nand_erase_options));
    nand_erase_options.length = CONFIG_ENV_RANGE;

    if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
        return 1;

    res = (char *)&env_new.data;
    len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
    if (len < 0) {
        error("Cannot export environment: errno = %d\n", errno);
        return 1;
    }
    env_new.crc = crc32(0, env_new.data, ENV_SIZE);
    env_new.flags   = ++env_flags; /* increase the serial */

    if (gd->env_valid == 1) {
        puts("Erasing redundant NAND...\n");
        nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
        if (nand_erase_opts(&nand_info[0], &nand_erase_options))
            return 1;

        puts("Writing to redundant NAND... ");
        ret = writeenv(CONFIG_ENV_OFFSET_REDUND, (u_char *)&env_new);
    } else {
        puts("Erasing NAND...\n");
        nand_erase_options.offset = CONFIG_ENV_OFFSET;
        if (nand_erase_opts(&nand_info[0], &nand_erase_options))
            return 1;

        puts("Writing to NAND... ");
        ret = writeenv(CONFIG_ENV_OFFSET, (u_char *)&env_new);
    }
    if (ret) {
        puts("FAILED!\n");
        return 1;
    }

    puts("done\n");

    gd->env_valid = gd->env_valid == 2 ? 1 : 2;

    return ret;
}   
#else /* ! CONFIG_ENV_OFFSET_REDUND */
int saveenv(void)
{   
    int ret = 0;
    env_t   env_new;
    ssize_t len;
    char    *res;
    nand_erase_options_t nand_erase_options;

    memset(&nand_erase_options, 0, sizeof(nand_erase_options));
    nand_erase_options.length = CONFIG_ENV_RANGE;
    nand_erase_options.offset = CONFIG_ENV_OFFSET;

    if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
        return 1;

    res = (char *)&env_new.data;
    len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
    if (len < 0) {
        error("Cannot export environment: errno = %d\n", errno);
        return 1;
    }
    env_new.crc = crc32(0, env_new.data, ENV_SIZE);

    puts("Erasing Nand...\n");
    if (nand_erase_opts(&nand_info[0], &nand_erase_options))
        return 1;

    puts("Writing to Nand... ");
    if (writeenv(CONFIG_ENV_OFFSET, (u_char *)&env_new)) {
        puts("FAILED!\n");
        return 1;
    }

    puts("done\n");
    return ret;
}
#endif /* CONFIG_ENV_OFFSET_REDUND */
#endif /* CMD_SAVEENV */

Have you already solve the problem about the WARNING,I meet the trouble also,what should I do to make it?