ls1046ardb: ERROR: fsl_ifc_read_buf beyond end of buffer (4096 requested, 512 available)

[renaud]

I have a ls1046ardb for which I am doing my own boot loader port.

I am getting the error described in the title after NAND flash identification:

nand_base: device found, Manufacturer ID: 0x2c, Chip ID: 0xac
nand_base: Micron MT29F4G08ABBEAH4
nand_base: 512 MiB, SLC, erase size: 256 KiB, page size: 4096, OOB size: 224
ERROR: fsl_ifc_read_buf beyond end of buffer (4096 requested, 512 available)

I can neither read or write data to the NAND. Though, it seems I can read OOB data correctly.

NAND controller configuration seems correct compared to U-boot (CSOR, FTIMx,)

The NAND driver I am using is properly working with a P1014.

In which circumstances would this message appear?

Could it be that I have not configured some registers outside of the IFC controller? clock,...?

Cheers,

Renaud

[renaud]

In fact the whole error is:

nand_base: device found, Manufacturer ID: 0x2c, Chip ID: 0xac
nand_base: Micron MT29F4G08ABBEAH4
nand_base: 512 MiB, SLC, erase size: 256 KiB, page size: 4096, OOB size: 224
ERROR: fsl_ifc_read_buf beyond end of buffer (4096 requested, 512 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (224 requested, 0 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (4096 requested, 0 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (224 requested, 0 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (4096 requested, 0 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (224 requested, 0 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (4096 requested, 0 available)
ERROR: fsl_ifc_read_buf beyond end of buffer (224 requested, 0 available)

Seems related to reading the BBT

[yipingwang · Accepted solution]

Please check IFC AMASK register definition, it is defined as the following in include/configs/ls1046ardb.h in u-boot source code.

#define CONFIG_SYS_NAND_AMASK IFC_AMASK(64 * 1024)

NAND flash is not memory mapped device, AMASK is  64k NAND Flash buffer size.