Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

CFI Flash - "NOR chip too large" error on uCLinux

Hello, I'm trying to use the CFI Flash on Arria II GX Development Kit 6G Edition on uCLinux. The flash is correctly probed but I get a warning about the flash size being truncated (below)....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Hi,

The message "NOR chip too large to fit in mapping. Attempting to cope..." is produced in the function 'genprobe_ident_chips' like 


static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chip_probe *cp)
{
    struct cfi_private cfi;
    struct cfi_private *retcfi;
    unsigned long *chip_map;
    int i, j, mapsize;
    int max_chips;
<skip>...
    /*
     * Allocate memory for bitmap of valid chips.
     * Align bitmap storage size to full byte.
     */
    max_chips = map->size >> cfi.chipshift;
    if (!max_chips) {
        printk(KERN_WARNING "NOR chip too large to fit in mapping. Attempting to cope...\n");
        max_chips = 1;
    }
    mapsize = sizeof(long) * DIV_ROUND_UP(max_chips, BITS_PER_LONG);
    chip_map = kzalloc(mapsize, GFP_KERNEL);

So you must enlarge the 'map->size', but I don't know where this value is set.

Kazu