1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Bad block table related constants</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="MTD NAND Driver Programming Interface"><link rel="up" href="defines.html" title="Chapter 8. Constants"><link rel="prev" href="Hardware_control_related_constants.html" title="Hardware control related constants"><link rel="next" href="structs.html" title="Chapter 9. Structures"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Bad block table related constants</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="Hardware_control_related_constants.html">Prev</a> </td><th width="60%" align="center">Chapter 8. Constants</th><td width="20%" align="right"> <a accesskey="n" href="structs.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="Bad_block_table_constants"></a>Bad block table related constants</h2></div></div></div><p> 2 These constants describe the options used for bad block 3 table descriptors. 4 </p><pre class="programlisting"> 5/* Options for the bad block table descriptors */ 6 7/* The number of bits used per block in the bbt on the device */ 8#define NAND_BBT_NRBITS_MSK 0x0000000F 9#define NAND_BBT_1BIT 0x00000001 10#define NAND_BBT_2BIT 0x00000002 11#define NAND_BBT_4BIT 0x00000004 12#define NAND_BBT_8BIT 0x00000008 13/* The bad block table is in the last good block of the device */ 14#define NAND_BBT_LASTBLOCK 0x00000010 15/* The bbt is at the given page, else we must scan for the bbt */ 16#define NAND_BBT_ABSPAGE 0x00000020 17/* bbt is stored per chip on multichip devices */ 18#define NAND_BBT_PERCHIP 0x00000080 19/* bbt has a version counter at offset veroffs */ 20#define NAND_BBT_VERSION 0x00000100 21/* Create a bbt if none axists */ 22#define NAND_BBT_CREATE 0x00000200 23/* Write bbt if necessary */ 24#define NAND_BBT_WRITE 0x00001000 25/* Read and write back block contents when writing bbt */ 26#define NAND_BBT_SAVECONTENT 0x00002000 27 </pre><p> 28 </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="Hardware_control_related_constants.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="defines.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="structs.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Hardware control related constants </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 9. Structures</td></tr></table></div></body></html> 29