+++ /dev/null
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->RedBoot Resource Usage</TITLE
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-TITLE="Getting Started with RedBoot"
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-TITLE="RedBoot Startup Mode"
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->Chapter 1. Getting Started with RedBoot</TD
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-><A
-NAME="RESOURCE-USAGE">RedBoot Resource Usage</H1
-><P
-> </P
-><P
->RedBoot takes up both flash and RAM resources depending on its
-startup mode and number of enabled features. There are also other
-resources used by RedBoot, such as timers. Platform-specific resources
-used by RedBoot are listed in the platform specific parts of this
-manual.</P
-><P
->Both flash and RAM resources used by RedBoot depend to some
-degree on the features enabled in the RedBoot configuration. It is
-possible to reduce in particular the RAM resources used by RedBoot by
-removing features that are not needed. Flash resources can also be
-reduced, but due to the granularity of the flash (the block sizes),
-reductions in feature size do not always result in flash resource
-savings.</P
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="AEN2631">Flash Resources</H2
-><P
->On many platforms, a ROM mode RedBoot image resides in the first
-flash sectors, working as the board's primary boot monitor. On these
-platforms, it is also normal to reserve a similar amount of flash for
-a secondary RAM mode image, which is used when updating the primary
-ROM mode image.</P
-><P
->On other platforms, a ROMRAM mode RedBoot image is used as the
-primary boot monitor. On these platforms there is not normally
-reserved space for a RAM mode RedBoot image, since the ROMRAM mode
-RedBoot is capable of updating the primary boot monitor image.</P
-><P
->Most platforms also contain a FIS directory (keeping track of
-available flash space) and a RedBoot config block (containing RedBoot
-board configuration data).</P
-><P
->To see the amount of reserved flash memory, run the <B
-CLASS="COMMAND"
->fis
-list</B
-> command:
-<TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->RedBoot> <TT
-CLASS="USERINPUT"
-><B
->fis list</B
-></TT
->
-Name FLASH addr Mem addr Length Entry point
-RedBoot 0x00000000 0x00000000 0x00020000 0x00000000
-RedBoot[RAM] 0x00020000 0x06020000 0x00020000 0x060213C0
-RedBoot config 0x0007F000 0x0007F000 0x00001000 0x00000000
-FIS directory 0x00070000 0x00070000 0x0000F000 0x00000000</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
->To save flash resources, use a ROMRAM mode RedBoot, or if using
-a ROM mode RedBoot, avoid reserving space for the RedBoot[RAM] image
-(this is done by changing the RedBoot configuration) and download the
-RAM mode RedBoot whenever it is needed. If the RedBoot image takes up
-a fraction of an extra flash block, it may be possible to reduce the
-image size enough to free this block by removing some features.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="AEN2641">RAM Resources</H2
-><P
->RedBoot reserves RAM space for its run-time data, and such
-things as CPU exception/interrupt tables. It normally does so at the
-bottom of the memory map. It may also reserve space at the top of the
-memory map for configurable RedBoot features such as the net stack
-and zlib decompression support.</P
-><P
->To see the actual amount of reserved space, issue the
-<B
-CLASS="COMMAND"
->version</B
-> command, which prints the RedBoot banner,
-including the RAM usage:
-<TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->RedBoot> <TT
-CLASS="USERINPUT"
-><B
->version</B
-></TT
->
-
-RedBoot(tm) bootstrap and debug environment [ROM]
-Non-certified release, version UNKNOWN - built 13:31:57, May 17 2002
-
-Platform: FooBar (SH 7615)
-Copyright (C) 2000, 2001, 2002, Red Hat, Inc.
-
-<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->RAM: 0x06000000-0x06080000, 0x06012498-0x06061000 available</I
-></SPAN
->
-FLASH: 0x00000000 - 0x00080000, 8 blocks of 0x00010000 bytes each.</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
->To simplify operations that temporarily need data in free
-memory, the limits of free RAM are also available as aliases (aligned
-to the nearest kilo-byte limit). These are named
-FREEMEMLO and
-FREEMEMHI, and can
-be used in commands like any user defined alias:
-<TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->RedBoot> <TT
-CLASS="USERINPUT"
-><B
->load -r -b %{FREEMEMLO} file</B
-></TT
->
-Raw file loaded 0x06012800-0x06013e53, assumed entry at 0x06012800</PRE
-></TD
-></TR
-></TABLE
->
-<TABLE
-BORDER="5"
-BGCOLOR="#E0E0F0"
-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->RedBoot> <TT
-CLASS="USERINPUT"
-><B
->x -b %{FREEMEMHI}</B
-></TT
->
-06061000: 86 F5 EB D8 3D 11 51 F2 96 F4 B2 DC 76 76 8F 77 |....=.Q.....vv.w|
-06061010: E6 55 DD DB F3 75 5D 15 E0 F3 FC D9 C8 73 1D DA |.U...u]......s..|</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
->To reduce RedBoot's RAM resource usage, use a ROM mode
-RedBoot. The RedBoot features that use most RAM are the net stack, the
-flash support and the gunzip support. These, and other features, can
-be disabled to reduce the RAM footprint, but obviously at the cost of
-lost functionality.</P
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