1 <?xml version="1.0" encoding="utf-8"?>

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     7     Nokia Corporation - initial contribution.

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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-9595FD6F-1EDE-51A8-B00D-029CFDFE0F38" xml:lang="en"><title>Boot Table</title><shortdesc>Describes the boot table.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    13 <p>The boot table consists of a linear array of 4-byte entries whose index

    14 positions are defined by the <codeph>TBootTableEntry</codeph> enumeration

    15 in <filepath>os/kernelhwsrv/kernel/eka/include/arm/bootdefs.h</filepath>. </p>

    16 <p>The entries in the array are divided into two groups, one whose index positions

    17 are defined by the enumerator names <codeph>BTF_*</codeph> and the other group

    18 defined by the enumerator names <codeph>BTP_*</codeph>. </p>

    19 <p>Entries in the first group specify addresses of <xref href="GUID-B3F6FC45-3BF0-5F92-8325-44C705BA47AE.dita">Boot

    20 Table Functions</xref>. </p>

    21 <p>Entries in the second group specify <xref href="GUID-C92CC81A-35A1-5860-AA08-C8C08B39804C.dita">Boot

    22 Table MMU Permission and Cache Attribute Definitions</xref> to be used for

    23 certain standard memory and I/O areas. </p>

    24 <p>A boot table entry is the offset of the function from the beginning of

    25 the bootstrap code but, since the bootstrap is linked for a base address of

    26 zero and is position independent, bare function addresses can be used. </p>

    27 <p>Use <codeph>DCD</codeph> to place a function in the boot table, for example: </p>

    28 <codeblock id="GUID-F36DF0E5-E337-5B1B-B098-64D78C3B0339" xml:space="preserve">DCD function-name</codeblock>

    29 <p>In the Template port, available in <filepath>os/kernelhwsrv/bsptemplate/asspandvariant/template_variant/bootstrap/template.s</filepath>,

    30 the boot table is defined by the label <codeph>BootTable</codeph>, followed

    31 by <codeph>DCD</codeph> entries for every boot table function, like in the

    32 following example: </p>

    33 <codeblock id="GUID-28F3F4E0-E196-50E4-8AFF-6672BA982FB4" xml:space="preserve">BootTable

    34         DCD    DoWriteC        ; output a debug character

    35         DCD    GetRamBanks    ; get list of RAM banks

    36         DCD    SetupRamBank    ; set up a RAM bank

    37         DCD    GetRomBanks    ; get list of ROM banks

    38         DCD    SetupRomBank    ; set up a ROM bank

    39         ...</codeblock>

    40 </conbody></concept>