add initial support for the crisarchitecture used on foxboards to openwrt

SVN-Revision: 7439

1 files changed, 401 insertions, 0 deletions

diff --git a/target/linux/etrax-2.6/image/e100boot/src/doc/e100boot.1 b/target/linux/etrax-2.6/image/e100boot/src/doc/e100boot.1
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+.\" ========================================================================
+.\"
+.IX Title "E100BOOT 1"
+.TH E100BOOT 1 "2003-12-16" "perl v5.8.8" "User Contributed Perl Documentation"
+.SH "NAME"
+e100boot \- Network and serial port bootloader for the ETRAX100 CPU.
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBe100boot\fR [\fB\-\-device\fR \fIdevicename\fR]
+[\fB\-\-file\fR \fIfilename\fR|\- \fIaddr\fR [\fIsize\fR]]
+[\fB\-\-flash\fR \fIram-source\fR \fIflash-offset\fR \fIsize\fR] [\fB\-\-pause\fR \fIiter\fR]
+[\fB\-\-memtest\fR \fIaddr\fR \fIaddr\fR] [\fB\-\-memclear\fR \fIaddr\fR \fIaddr\fR]
+[\fB\-\-memdump\fR \fIaddr\fR \fIaddr\fR] [\fB\-\-setreg\fR \fIaddr\fR|\fIregname\fR \fIval\fR]
+[\fB\-\-getreg\fR \fIaddr\fR|\fIregname\fR] [\fB\-\-verify\fR \fIaddr\fR \fIval\fR]
+[\fB\-\-label\fR \fIlabel\fR] [\fB\-\-loop\fR \fIaddr\fR \fIlabel\fR] [\fB\-\-5400\fR] [\fB\-\-5600\fR]
+[\fB\-\-testcard\fR] [\fB\-\-devboard\fR] [\fB\-\-testcardlx\fR] [\fB\-\-network\fR] [\fB\-\-serial\fR]
+[\fB\-\-baudrate\fR \fIbaudrate\fR] [\fB\-\-bootfile\fR \fIfile\fR] [\fB\-\-jump\fR \fIaddr\fR]
+[\fB\-\-tofiles\fR] [\fB\-\-cmdsonly\fR] [\fB\-\-images\fR] [\fB\-\-noleds\fR] [\fB\-\-help\fR]
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This boot loader facilitates loading of files over the network or a
+serial port to an \s-1ETRAX100\s0. It can also be used for fairly extensive
+hardware debugging as you can read and write to any memory addresses,
+including the \s-1ETRAX100\s0 registers. You can also perform memory checks
+and dumps and copy data to flash memories.
+.PP
+The first packet (or the first 784 bytes in the case of serial boot)
+sent to Etrax100 is loaded into the cache. The code in this packet is
+executed and loads the rest of the boot loader into the cache. The
+cache is the only thing we can be sure of exists on all \s-1ETRAX100\s0
+products, so the boot loader is limited to the size of the cache,
+8KB. If further boot loading code is needed you have to set up
+external memory and load another boot loader into it, but this is
+rarely needed.
+.PP
+Two programs are involved in this boot loading, one is the program on
+your workstation that sends the packets to \s-1ETRAX100\s0, this is called
+the server boot loader or \s-1SBL\s0. The other program is the one in
+\&\s-1ETRAX100\s0 that receives packets from the \s-1SBL\s0 and acts upon the data
+therein, this is called the client boot loader or \s-1CBL\s0.
+.PP
+We don't want to edit and recompile the \s-1CBL\s0 each time we want to load
+level two to different parts of memory, like we do on different
+products. We also want to change things like the setup of external
+memory before we load data into it. To make the boot loading as
+flexible as possible and separate the \s-1CBL\s0 from level two we send a
+configuration packet to it. After this packet we load other files, if
+we want to.
+.PP
+The configuration packet can contain information to the \s-1CBL\s0 which lets
+you: initialize external memory, read and write to all \s-1ETRAX100\s0
+registers, read and write to any part of memory, load as many other
+files as you like to any part of memory you like, etc. The
+configuration packet is generated on the fly by the \s-1SBL\s0.
+.PP
+Since the \s-1CBL\s0 is unaware of which product it will be loaded on, it
+doesn't do product specific initialization like setting up the
+memory. This must be done with the configuration packet.
+.Sh "Debugging printout"
+.IX Subsection "Debugging printout"
+When doing network boot the debugging printout from the \s-1CBL\s0 in \s-1ETRAX\s0
+is transmitted back over the network and printed by e100boot. When
+doing serial boot that interface will be used. So in either case you
+will not need any other software or hardware to receive the debugging
+printout.
+.Sh "Creating binaries"
+.IX Subsection "Creating binaries"
+The files containing code to be loaded on the \s-1ETRAX100\s0 must be
+stripped using the standard \s-1GCC\s0 binutils.
+.Sh "How it works, things you don't want to know."
+.IX Subsection "How it works, things you don't want to know."
+ack, timeout bla, bla... \s-1RTFS\s0.
+.Sh "Compilation and code"
+.IX Subsection "Compilation and code"
+Noteworthy is that two separate \s-1ETRAX100\s0 binaries are created, one for
+network boot and one for serial boot. They actually contain exactly
+the same code, but linked in different order. This is because the code
+to load the rest of the bootloader over a specific interface must be
+contained in the first data sent to the \s-1ETRAX100\s0 and it is too
+difficult to cram the code for both interfaces in the beginning of the
+same binary. Hence two files.
+.PP
+Other stuff you don't want to know is that the cache is mapped from
+0x380000f0 to 0x380020f0. Code starts at the first address followed by
+data up to the symbol \fIEbss\fR. At the other end is the buffer for boot
+commands (addresses defined by \fI\s-1IO_BUF_START\s0\fR and \fI\s-1IO_BUF_END\s0\fR below
+which the stack lies and hopefully the stack and \fIEbss\fR will never
+meet...
+.PP
+The serial data is loaded from 0x380000f0 to 0x380003ff before
+execution starts.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+The options are done in the order specified on the command line, so
+you probably want to do any memory setup before loading a file to the
+memory, and you probably do not want to perform a memory test after
+you have loaded a file to that memory.
+.PP
+All addresses and sizes must be in hex with optional '0x' prefix, or a
+\&\s-1ETRAX100\s0 register name. Since the \fB\-\-setreg\fR and \fB\-\-getreg\fR options
+only can be performed on dword aligned dwords only the registers that
+conform to this can be named.
+.PP
+Note also that all addresses must be in uncached memory (bit 31 set),
+as the bootloader lies in the cache. If you access any uncached
+address during boot, the bootloader will be destroyed without warning.
+.PP
+It is also possible to specify an address as \fI+address\fR, in which
+case it is considered to be relative to \fI\s-1IO_BUF_START\s0\fR. This is
+especially useful in combination with the \fB\-\-loop\fR option below.
+.IP "\fB\-\-baudrate\fR \fIbaudrate\fR" 4
+.IX Item "--baudrate baudrate"
+Set baudrate for files loaded after the boot loader.
+.IP "\fB\-\-bootfile\fR \fIfilename\fR" 4
+.IX Item "--bootfile filename"
+Which boot image to send to \s-1ETRAX\s0 instead of the default ones.
+.IP "\fB\-\-cmdsonly\fR" 4
+.IX Item "--cmdsonly"
+Write the commands to file e100boot.cmds.
+.IP "\fB\-\-devboard\fR" 4
+.IX Item "--devboard"
+Sets registers for the developer board.
+.IP "\fB\-\-device\fR \fIdevicename\fR" 4
+.IX Item "--device devicename"
+Which device to send packets on. For network boot the default is
+eth0. For serial boot it is ttyS0.
+.IP "\fB\-\-file\fR \fIfilename\fR|\- \fIaddress\fR [\fIsize\fR]" 4
+.IX Item "--file filename|- address [size]"
+The file to load and the address to load it to. If file is loaded on
+stdin, specify filename '\-' followed by a size. Size need only be
+given in this case. You can load as many files as you want, each
+specified with a \fB\-\-file\fR.
+.IP "\fB\-\-flash\fR \fIram-source flash-offset size\fR" 4
+.IX Item "--flash ram-source flash-offset size"
+Copies the specified \s-1RAM\s0 area to the flash.
+.IP "\fB\-\-getreg\fR \fIaddress\fR|\fIregname\fR" 4
+.IX Item "--getreg address|regname"
+Print value of memory location. Must be uncached address.
+.IP "\fB\-\-help\fR" 4
+.IX Item "--help"
+Print the help information.
+.IP "\fB\-\-images\fR" 4
+.IX Item "--images"
+Print information about the internal boot images, then exit.
+.IP "\fB\-\-jump\fR \fIaddress\fR" 4
+.IX Item "--jump address"
+Jump to specified address.
+.IP "\fB\-\-label\fR \fIlabel\fR" 4
+.IX Item "--label label"
+Define a label to be used as target by the \fB\-\-loop\fR command. This
+command is only used by the \s-1SBL\s0 to calculate the address for the
+\&\fB\-\-loop\fR and does not take up any space in the configuration packet.
+.IP "\fB\-\-loop\fR \fIcheck-address label\fR" 4
+.IX Item "--loop check-address label"
+If the contents of check-address is nonzero it is decremented and the
+command parser continues parsing at the label.
+.Sp
+If no external memory is initialized yet it can be convenient to use
+an address in the area occupied by the configuration packet. Run
+e100boot with \fB\-\-help\fR to see which addresses the commands are stored
+at. The size of the commands are four bytes for each command plus four
+bytes per argument to the command.
+.IP "\fB\-\-memclear\fR \fIstart-address end-address\fR" 4
+.IX Item "--memclear start-address end-address"
+Clears the specified memory area.
+.IP "\fB\-\-memdump\fR \fIstart-address end-address\fR" 4
+.IX Item "--memdump start-address end-address"
+Prints the contents of the specified memory area.
+.IP "\fB\-\-memtest\fR \fIstart-address end-address\fR" 4
+.IX Item "--memtest start-address end-address"
+Does a fairly extensive test of the specified memory area. Not only
+catches defect memories but also catches things like wrong memory
+setups where memory addresses are mirrored onto each other.
+.IP "\fB\-\-network\fR" 4
+.IX Item "--network"
+Perform a network boot.
+.IP "\fB\-\-noleds\fR" 4
+.IX Item "--noleds"
+When using the internal images use a version that does not toggle
+general port \s-1PA\s0 or \s-1PB\s0 in \s-1ETRAX\s0 during the boot procedure.
+.IP "\fB\-\-pause\fR \fIiterations\fR" 4
+.IX Item "--pause iterations"
+How many \fIiterations\fR to do of an empty loop.
+.IP "\fB\-\-serial\fR" 4
+.IX Item "--serial"
+Do a serial boot.
+.IP "\fB\-\-setreg\fR \fIaddress\fR|\fIregname\fR \fIvalue\fR" 4
+.IX Item "--setreg address|regname value"
+Load dword to dword aligned memory location.
+.IP "\fB\-\-testcard\fR" 4
+.IX Item "--testcard"
+Configures the memories for the \s-1ETRAX\s0 100 testcard.
+.IP "\fB\-\-testcardlx\fR" 4
+.IX Item "--testcardlx"
+Configures the memories for the \s-1ETRAX100\s0 \s-1LX\s0 testcard.
+.IP "\fB\-\-tofiles\fR" 4
+.IX Item "--tofiles"
+Write packets to files e100boot.seq[0..]. Does not transmit the data.
+.IP "\fB\-\-verify\fR \fIaddress value\fR" 4
+.IX Item "--verify address value"
+Verify that memory contains dword. If not loader will stop. This is to
+avoid booting the wrong unit. If you have the units ethernet address
+in the flash memory you can check for that.
+.IP "\fB\-\-5400\fR" 4
+.IX Item "--5400"
+Sets R_WAITSTATES, R_DRAM_TIMING and R_DRAM_CONFIG for the 5400
+printserver.
+.IP "\fB\-\-5600\fR" 4
+.IX Item "--5600"
+Sets R_WAITSTATES, R_DRAM_TIMING and R_DRAM_CONFIG for the 5600
+printserver.
+.SH "EXAMPLES"
+.IX Header "EXAMPLES"
+If you have a stripped binary (file.ima) linked to 0x08000000 that you want
+to boot via the network, do this:
+.PP
+\&\fBe100boot \-\-file file.ima 88000000 \-\-jump 08000000\fR
+.PP
+Or something like this. Sets waitstates to zero and loads two files,
+the first from stdin:
+.PP
+\&\fBcat file.ima | e100boot \-\-memtest 88000000 8801ffff \-\-memclear
+88000000 8801ffff \-\-setreg b0000000 0 \-\-getreg b0000000 \-\-file \-
+88000000 a000 \-\-file file2.ima 88010000 \-\-memdump 88000000 880000ff
+\&\-\-jump 08000000\fR
+.PP
+Or this, enables 16 bit parallel port and flashes the led on \s-1PA0:\s0
+.PP
+\&\fBe100boot \-\-testcardlx \-\-setreg R_PORT_PA_SET 0x00000000 \-\-setreg
+R_GEN_CONFIG 0x80000004 \-\-setreg R_PAR0_CONFIG 0x00000200 \-\-setreg
+R_PORT_G_DATA 0x00000000 \-\-pause 0x02000000 \-\-setreg R_PORT_G_DATA
+0xffffffff \-\-pause 0x02000000 \-\-setreg R_PORT_G_DATA 0x00000000 \-\-loop
+0x38001e0b 0x38001e60\fR
+.PP
+Setup the memory, test the \s-1SRAM\s0, print the contents of the first 256
+bytes of \s-1SRAM\s0, clear \s-1SRAM\s0, test the \s-1DRAM\s0, print R_DMA_CH0_CMD, load a
+file to \s-1SRAM\s0, load another file to \s-1SRAM\s0, load file to \s-1DRAM\s0, jump to
+code in \s-1SRAM\s0.
+.PP
+\&\fBe100boot \-\-setreg b0000000 1000 \-\-setreg b0000008 00006543 \-\-setreg
+b000000c 12966060 \-\-memtest 88000000 80000 \-\-memdump 88000000 880000ff
+\&\-\-memclear 88000000 80000 \-\-memtest c0000000 400000 \-\-getreg b00001d0
+\&\-\-file file1.ima 88000000 \-\-file file2.ima 88010000 \-\-file file3.ima
+c0000000 \-\-jump 88000000\fR
+.PP
+Boot Linux on the testcard.
+.PP
+\&\fBe100boot \-\-setreg b0000000 1000 \-\-setreg b0000008 6557 \-\-setreg
+b000000c 1b988080 \-\-file timage c0000500 \-\-jump 40000500\fR
+.PP
+Booting over serial port and using labels to flash the leds on port
+\&\s-1PA\s0.
+.PP
+\&\fBe100boot \-\-serial \-\-device /dev/ttyS1 \-\-baudrate 9600 \-\-label first
+\&\-\-setreg 0x380020e0 00000001 \-\-setreg R_PORT_PA_SET 0x0000ff00 \-\-pause
+0x02000000 \-\-setreg R_PORT_PA_SET 0x0000ffff \-\-pause 0x02000000 \-\-loop
+0x380020e0 first\fR
+.SH "BUGS"
+.IX Header "BUGS"
+You're kidding, right? Check \s-1AUTHOR\s0 below. The only thing
+would be the hubris of the author, but that I consider a feature. If
+you find any other 'features' report them to
+technology@axis.com. Don't bother the author directly, he is busy
+playing PlayStation2.
+.SH "COPYING"
+.IX Header "COPYING"
+Copyright © 1996\-2002 Axis Communications \s-1AB\s0.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Written by Ronny Ranerup.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+The fine source, which you can get at http://developer.axis.com.