Boot Image creation for NAND Flash

vijayabharathi chelladurai

Problem now iam facing is the boot image creation for the NAND flash

I done below steps and tried to check booting

1. Written a code for blinking a LED in the hawk board i verified using the JTAG,

2.From the .out file of this project created the ais file using the ais file generator.. Some of the settings for PLL0,PLL1,DDR are used as per hawk board forum

3. I tried to use NAND Flash writer to flash the ais file in the NAND Flash

While using the "NAND Flash Writer" there were 3 options

1.DSPAIS

Which writes in first block of NAND flash

if (dspais)

{
  gNandBoot.magicNum    = UBL_MAGIC_SAFE;
  gNandBoot.block       = DEVICE_NAND_RBL_SEARCH_START_BLOCK;
  gNandBoot.entryPoint = 0x0100;
  gNandBoot.ldAddress   = 0;
}

2. ARMUBL

Which writes in 2nd block

else if (armubl == 1)

{
  gNandBoot.magicNum    = UBL_MAGIC_BIN_IMG;
  gNandBoot.block       = DEVICE_NAND_ARM_UBL_SEARCH_START_BLOCK;
  gNandBoot.entryPoint = 0x80000000;
  gNandBoot.ldAddress   = 0x80000000;
}

U-Boot

Which also writes in 2nd block

else if (uboot == 1) {
  gNandBoot.magicNum    = UBL_MAGIC_DMA;
  gNandBoot.block       = (armboot ?
    DEVICE_ARMBOOT_NAND_UBOOT_SEARCH_START_BLOCK :
    DEVICE_DSPBOOT_NAND_UBOOT_SEARCH_START_BLOCK);
  gNandBoot.entryPoint = 0xc1080000;
  gNandBoot.ldAddress   = 0xc1080000;
}

I didnt understand the parameters like

gNandBoot.entryPoint

gNandBoot.ldAddress

What they signify?

Kindly advice me for the steps for correct boot image creation

Regards

Vijayabharathi C

over 14 years ago

0 vijayabharathi chelladurai over 14 years ago

Intellectual 955 points

Iam using the "NAND_FlashWriter" in the location

\DaVinci-PSP-SDK-03.20.00.11\DaVinci-PSP-SDK-03.20.00.11\src\utils\nand-writer-03.20.00.11

0 1258021 over 14 years ago in reply to vijayabharathi chelladurai

Genius 5120 points

Hi Vijayabharathi Chelladurai,

I guess Entry Point is at the end of this program PC might be loaded with that address.

LdAddress might be, for example the boot sequence is RBL --> UBL --> UBOOT.

For example RBL starts executing then if ldAddress is 0x80000000 then, RBL will copy UBL to that address

Entry Point once copying UBL is completed PC (Program Counter) is loaded with that address.

Thank You & Regards,

GSR

0 vijayabharathi chelladurai over 14 years ago in reply to 1258021

Intellectual 955 points

Thanks for the reply.. Please follow this chain

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/113922.aspx

Regards

Vijayabharathi C

0 Daniel Allred over 14 years ago

TI__Genius 17355 points

When flashing binary components that are not in the AIS format, extra information about where to load the binary data and where the boot loader should jump into the image must be provided. This information is already part of an AIS image that is generated. Typically, only the UBL (the code/data loaded by the ROM boot loader) is in the AIS format. The component(s) that the UBL loads (typically u-boot for booting into Linux) are just binary blobs with heades containing a magic number and the load and entry point addresses. The UBL will parse that info and use it to tranistion CPU execution to the loaded software components.

Regards, Daniel

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Boot Image creation for NAND Flash