UM0851 datasheet(142/245 Pages) STMICROELECTRONICS

142 / 245 page

Non-volatile memory device drivers

UM0851

142/245

Doc ID 16604 Rev 2

.mask_flags

= 0

{

.name

= "rootfs",

.offset

= 0x00380000,

.size

= 0x00500000,

.mask_flags

= 0

{

.name

= "userspace",

.offset

= 0x00880000,

.size

= 0x00780000,

.mask_flags

= 0

}

};

static struct physmap_flash_data emi_norflash_data = {

.width

= 4,

.parts

= emi_norflash_partitions,

.nr_parts

= ARRAY_SIZE(emi_norflash_partitions),

};

static struct resource emi_norflash_resource = {

.start

= NOR_FLASH_PHYS,

.end

= NOR_FLASH_PHYS + SZ_16M - 1,

.flags

= IORESOURCE_MEM,

};

static struct platform_device emi_norflash_device = {

.name

= "physmap-flash",

.id

= 0,

.dev

= {

.platform_data

= &emi_norflash_data,

.num_resources

= 1,

.resource

= &emi_norflash_resource,

};

These settings are based on two M28W640HC chips as used in the SPEAr310 Evaluation

board. You have to modify these settings for different chips.

How to support a new NOR Flash

In case of a new NOR Flash chip, the following needs to be checked in the global

configuration file of U-Boot:

Change CFG_MAX_FLASH_SECT macro definition based on the number of blocks of

NOR Flash.

If you want to change the partition size, the following macro definitions also need to be

modified:

–

CONFIG_BOOTCOMMAND

–

CFG_MONITOR_LEN

–

CFG_MONITOR_BASE

–

CFG_ENV_SIZE

In case of a new NOR Flash chip, the following need to be checked in the resource file of

Linux:

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