freebsd-dev/sys/boot/forth/loader.4th

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1999-03-09 14:06:55 +00:00
\ Copyright (c) 1999 Daniel C. Sobral <dcs@freebsd.org>
\ All rights reserved.
\
\ Redistribution and use in source and binary forms, with or without
\ modification, are permitted provided that the following conditions
\ are met:
\ 1. Redistributions of source code must retain the above copyright
\ notice, this list of conditions and the following disclaimer.
\ 2. Redistributions in binary form must reproduce the above copyright
\ notice, this list of conditions and the following disclaimer in the
\ documentation and/or other materials provided with the distribution.
\
\ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
\ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
\ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
\ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
\ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
\ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
\ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
\ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
\ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
\ SUCH DAMAGE.
\
1999-08-28 01:08:13 +00:00
\ $FreeBSD$
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s" arch-i386" environment? [if] [if]
s" loader_version" environment? [if]
11 < [if]
.( Loader version 1.1+ required) cr
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abort
[then]
[else]
.( Could not get loader version!) cr
abort
[then]
[then] [then]
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256 dictthreshold ! \ 256 cells minimum free space
2048 dictincrease ! \ 2048 additional cells each time
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include /boot/support.4th
only forth also support-functions also builtins definitions
: try-menu-unset
\ menu-unset may not be present
s" beastie_disable" getenv
dup -1 <> if
s" YES" compare-insensitive 0= if
exit
then
else
drop
then
s" menu-unset"
sfind if
execute
else
drop
then
;
: boot
0= if ( interpreted ) get_arguments then
First tackle at trying to handle the New Deal on kernels. Load the first of the following kernels to be found: ${kernel} if ${kernel} is an absolute path /boot/${kernel}/${kernel} /boot/${kernel}/${bootfile} ${kernel}/${kernel} ${kernel}/${bootfile} ${kernel} ${bootfile} The last instance of ${kernel} and ${bootfile} will be treated as a list of semicolon separated file names, and each will be tried in turn, from left to right. Also, for each filename loader(8) will try filename, filename.ko, filename.gz, filename.ko.gz, in that order, but that's not related to this code. This resulted in a major reorganization of the code, and much of what was accumulating on loader.4th was rightly transfered to support.4th. The semantics of boot-conf and boot also changed. Both will try to load a kernel the same as above. After a kernel was loaded, the variable module_path may get changed. Such change will happen if the kernel was found with a directory prefix. In that case, the module path will be set to ${directory};${module_path}. Next, the modules are loaded as usual. This is intended so kernel="xyzzy" in /boot/loader.conf will load /boot/xyzzy/kernel.ko, load system modules from /boot/xyzzy/, and load third party modules from /boot/modules or /modules. If that doesn't work, it's a bug. Also, fix a breakage of "boot" which was recently introduced. Boot without any arguments would fail. No longer. Also, boot will only unload/reload if the first argument is a path. If no argument exists or the first argument is a flag, boot will use whatever is already loaded. I hope this is POLA. That behavior is markedly different from that of boot-conf, which will always unload/reload. The semantics introduced here are experimental. Even if the code works, we might decide this is not the prefered behavior. If you feel so, send your feedback. (Yeah, this belongs in a HEADS UP or something, but I've been working for the past 16 hours on this stuff, so gimme a break.)
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\ Unload only if a path was passed
dup if
>r over r> swap
First tackle at trying to handle the New Deal on kernels. Load the first of the following kernels to be found: ${kernel} if ${kernel} is an absolute path /boot/${kernel}/${kernel} /boot/${kernel}/${bootfile} ${kernel}/${kernel} ${kernel}/${bootfile} ${kernel} ${bootfile} The last instance of ${kernel} and ${bootfile} will be treated as a list of semicolon separated file names, and each will be tried in turn, from left to right. Also, for each filename loader(8) will try filename, filename.ko, filename.gz, filename.ko.gz, in that order, but that's not related to this code. This resulted in a major reorganization of the code, and much of what was accumulating on loader.4th was rightly transfered to support.4th. The semantics of boot-conf and boot also changed. Both will try to load a kernel the same as above. After a kernel was loaded, the variable module_path may get changed. Such change will happen if the kernel was found with a directory prefix. In that case, the module path will be set to ${directory};${module_path}. Next, the modules are loaded as usual. This is intended so kernel="xyzzy" in /boot/loader.conf will load /boot/xyzzy/kernel.ko, load system modules from /boot/xyzzy/, and load third party modules from /boot/modules or /modules. If that doesn't work, it's a bug. Also, fix a breakage of "boot" which was recently introduced. Boot without any arguments would fail. No longer. Also, boot will only unload/reload if the first argument is a path. If no argument exists or the first argument is a flag, boot will use whatever is already loaded. I hope this is POLA. That behavior is markedly different from that of boot-conf, which will always unload/reload. The semantics introduced here are experimental. Even if the code works, we might decide this is not the prefered behavior. If you feel so, send your feedback. (Yeah, this belongs in a HEADS UP or something, but I've been working for the past 16 hours on this stuff, so gimme a break.)
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c@ [char] - <> if
0 1 unload drop
else
s" kernelname" getenv? if ( a kernel has been loaded )
try-menu-unset
1 boot exit
then
load_kernel_and_modules
?dup if exit then
try-menu-unset
0 1 boot exit
First tackle at trying to handle the New Deal on kernels. Load the first of the following kernels to be found: ${kernel} if ${kernel} is an absolute path /boot/${kernel}/${kernel} /boot/${kernel}/${bootfile} ${kernel}/${kernel} ${kernel}/${bootfile} ${kernel} ${bootfile} The last instance of ${kernel} and ${bootfile} will be treated as a list of semicolon separated file names, and each will be tried in turn, from left to right. Also, for each filename loader(8) will try filename, filename.ko, filename.gz, filename.ko.gz, in that order, but that's not related to this code. This resulted in a major reorganization of the code, and much of what was accumulating on loader.4th was rightly transfered to support.4th. The semantics of boot-conf and boot also changed. Both will try to load a kernel the same as above. After a kernel was loaded, the variable module_path may get changed. Such change will happen if the kernel was found with a directory prefix. In that case, the module path will be set to ${directory};${module_path}. Next, the modules are loaded as usual. This is intended so kernel="xyzzy" in /boot/loader.conf will load /boot/xyzzy/kernel.ko, load system modules from /boot/xyzzy/, and load third party modules from /boot/modules or /modules. If that doesn't work, it's a bug. Also, fix a breakage of "boot" which was recently introduced. Boot without any arguments would fail. No longer. Also, boot will only unload/reload if the first argument is a path. If no argument exists or the first argument is a flag, boot will use whatever is already loaded. I hope this is POLA. That behavior is markedly different from that of boot-conf, which will always unload/reload. The semantics introduced here are experimental. Even if the code works, we might decide this is not the prefered behavior. If you feel so, send your feedback. (Yeah, this belongs in a HEADS UP or something, but I've been working for the past 16 hours on this stuff, so gimme a break.)
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then
else
s" kernelname" getenv? if ( a kernel has been loaded )
try-menu-unset
1 boot exit
then
load_kernel_and_modules
?dup if exit then
try-menu-unset
0 1 boot exit
First tackle at trying to handle the New Deal on kernels. Load the first of the following kernels to be found: ${kernel} if ${kernel} is an absolute path /boot/${kernel}/${kernel} /boot/${kernel}/${bootfile} ${kernel}/${kernel} ${kernel}/${bootfile} ${kernel} ${bootfile} The last instance of ${kernel} and ${bootfile} will be treated as a list of semicolon separated file names, and each will be tried in turn, from left to right. Also, for each filename loader(8) will try filename, filename.ko, filename.gz, filename.ko.gz, in that order, but that's not related to this code. This resulted in a major reorganization of the code, and much of what was accumulating on loader.4th was rightly transfered to support.4th. The semantics of boot-conf and boot also changed. Both will try to load a kernel the same as above. After a kernel was loaded, the variable module_path may get changed. Such change will happen if the kernel was found with a directory prefix. In that case, the module path will be set to ${directory};${module_path}. Next, the modules are loaded as usual. This is intended so kernel="xyzzy" in /boot/loader.conf will load /boot/xyzzy/kernel.ko, load system modules from /boot/xyzzy/, and load third party modules from /boot/modules or /modules. If that doesn't work, it's a bug. Also, fix a breakage of "boot" which was recently introduced. Boot without any arguments would fail. No longer. Also, boot will only unload/reload if the first argument is a path. If no argument exists or the first argument is a flag, boot will use whatever is already loaded. I hope this is POLA. That behavior is markedly different from that of boot-conf, which will always unload/reload. The semantics introduced here are experimental. Even if the code works, we might decide this is not the prefered behavior. If you feel so, send your feedback. (Yeah, this belongs in a HEADS UP or something, but I've been working for the past 16 hours on this stuff, so gimme a break.)
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then
load_kernel_and_modules
?dup 0= if 0 1 boot then
;
\ ***** boot-conf
\
\ Prepares to boot as specified by loaded configuration files.
: boot-conf
0= if ( interpreted ) get_arguments then
First tackle at trying to handle the New Deal on kernels. Load the first of the following kernels to be found: ${kernel} if ${kernel} is an absolute path /boot/${kernel}/${kernel} /boot/${kernel}/${bootfile} ${kernel}/${kernel} ${kernel}/${bootfile} ${kernel} ${bootfile} The last instance of ${kernel} and ${bootfile} will be treated as a list of semicolon separated file names, and each will be tried in turn, from left to right. Also, for each filename loader(8) will try filename, filename.ko, filename.gz, filename.ko.gz, in that order, but that's not related to this code. This resulted in a major reorganization of the code, and much of what was accumulating on loader.4th was rightly transfered to support.4th. The semantics of boot-conf and boot also changed. Both will try to load a kernel the same as above. After a kernel was loaded, the variable module_path may get changed. Such change will happen if the kernel was found with a directory prefix. In that case, the module path will be set to ${directory};${module_path}. Next, the modules are loaded as usual. This is intended so kernel="xyzzy" in /boot/loader.conf will load /boot/xyzzy/kernel.ko, load system modules from /boot/xyzzy/, and load third party modules from /boot/modules or /modules. If that doesn't work, it's a bug. Also, fix a breakage of "boot" which was recently introduced. Boot without any arguments would fail. No longer. Also, boot will only unload/reload if the first argument is a path. If no argument exists or the first argument is a flag, boot will use whatever is already loaded. I hope this is POLA. That behavior is markedly different from that of boot-conf, which will always unload/reload. The semantics introduced here are experimental. Even if the code works, we might decide this is not the prefered behavior. If you feel so, send your feedback. (Yeah, this belongs in a HEADS UP or something, but I've been working for the past 16 hours on this stuff, so gimme a break.)
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0 1 unload drop
load_kernel_and_modules
?dup 0= if 0 1 autoboot then
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;
also forth definitions also builtins
builtin: boot
builtin: boot-conf
only forth definitions also support-functions
include /boot/check-password.4th
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\ ***** start
\
\ Initializes support.4th global variables, sets loader_conf_files,
\ process conf files, and, if any one such file was succesfully
\ read to the end, load kernel and modules.
: start ( -- ) ( throws: abort & user-defined )
s" /boot/defaults/loader.conf" initialize
include_conf_files
include_nextboot_file
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\ Will *NOT* try to load kernel and modules if no configuration file
\ was succesfully loaded!
any_conf_read? if
load_kernel
load_modules
then
;
\ ***** initialize
\
\ Overrides support.4th initialization word with one that does
\ everything start one does, short of loading the kernel and
\ modules. Returns a flag
: initialize ( -- flag )
s" /boot/defaults/loader.conf" initialize
include_conf_files
include_nextboot_file
any_conf_read?
;
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\ ***** read-conf
\
\ Read a configuration file, whose name was specified on the command
\ line, if interpreted, or given on the stack, if compiled in.
: (read-conf) ( addr len -- )
This patch introduces a number of simplifications to the Forth functions used in the bootloader. The goal is to make the code more readable and smaller (especially because we have size issues in the loader's environment). High level description of the changes: + define some string manipulation functions to improve readability; + create functions to manipulate module descriptors, removing some duplicated code; + rename the error codes to ESOMETHING; + consistently use set_environment_variable (which evaluates $variables) when interpreting variable=value assignments; I have tested the code, but there might be code paths that I have not traversed so please let me know of any issues. Details of this change: --- loader.4th --- + add some module operators, to remove duplicated code while parsing module-related commands: set-module-flag enable-module disable-module toggle-module show-module --- pnp.4th --- + move here the definition related to the pnp devices list, e.g. STAILQ_* , pnpident, pnpinfo --- support.4th --- + rename error codes to capital e.g. ENOMEM EFREE ... and do obvious changes related to the renaming; + remove unused structures (those relevant to pnp are moved to pnp.4th) + various string functions - strlen removed (it is an internal function) - strchr, defined as the C function - strtype -- type a string to output - strref -- assign a reference to the string on the stack - unquote -- remove quotes from a string + remove reset_line_buffer + move up the 'set_environment_variable' function (which now uses the interpreter, so $variables are evaluated). Use the function in various places + add a 'test_file function' for debugging purposes MFC after: 4 weeks
2009-01-05 20:09:54 +00:00
conf_files string=
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include_conf_files \ Will recurse on new loader_conf_files definitions
;
: read-conf ( <filename> | addr len -- ) ( throws: abort & user-defined )
state @ if
\ Compiling
postpone (read-conf)
else
\ Interpreting
bl parse (read-conf)
then
; immediate
This patch introduces a number of simplifications to the Forth functions used in the bootloader. The goal is to make the code more readable and smaller (especially because we have size issues in the loader's environment). High level description of the changes: + define some string manipulation functions to improve readability; + create functions to manipulate module descriptors, removing some duplicated code; + rename the error codes to ESOMETHING; + consistently use set_environment_variable (which evaluates $variables) when interpreting variable=value assignments; I have tested the code, but there might be code paths that I have not traversed so please let me know of any issues. Details of this change: --- loader.4th --- + add some module operators, to remove duplicated code while parsing module-related commands: set-module-flag enable-module disable-module toggle-module show-module --- pnp.4th --- + move here the definition related to the pnp devices list, e.g. STAILQ_* , pnpident, pnpinfo --- support.4th --- + rename error codes to capital e.g. ENOMEM EFREE ... and do obvious changes related to the renaming; + remove unused structures (those relevant to pnp are moved to pnp.4th) + various string functions - strlen removed (it is an internal function) - strchr, defined as the C function - strtype -- type a string to output - strref -- assign a reference to the string on the stack - unquote -- remove quotes from a string + remove reset_line_buffer + move up the 'set_environment_variable' function (which now uses the interpreter, so $variables are evaluated). Use the function in various places + add a 'test_file function' for debugging purposes MFC after: 4 weeks
2009-01-05 20:09:54 +00:00
\ show, enable, disable, toggle module loading. They all take module from
\ the next word
This patch introduces a number of simplifications to the Forth functions used in the bootloader. The goal is to make the code more readable and smaller (especially because we have size issues in the loader's environment). High level description of the changes: + define some string manipulation functions to improve readability; + create functions to manipulate module descriptors, removing some duplicated code; + rename the error codes to ESOMETHING; + consistently use set_environment_variable (which evaluates $variables) when interpreting variable=value assignments; I have tested the code, but there might be code paths that I have not traversed so please let me know of any issues. Details of this change: --- loader.4th --- + add some module operators, to remove duplicated code while parsing module-related commands: set-module-flag enable-module disable-module toggle-module show-module --- pnp.4th --- + move here the definition related to the pnp devices list, e.g. STAILQ_* , pnpident, pnpinfo --- support.4th --- + rename error codes to capital e.g. ENOMEM EFREE ... and do obvious changes related to the renaming; + remove unused structures (those relevant to pnp are moved to pnp.4th) + various string functions - strlen removed (it is an internal function) - strchr, defined as the C function - strtype -- type a string to output - strref -- assign a reference to the string on the stack - unquote -- remove quotes from a string + remove reset_line_buffer + move up the 'set_environment_variable' function (which now uses the interpreter, so $variables are evaluated). Use the function in various places + add a 'test_file function' for debugging purposes MFC after: 4 weeks
2009-01-05 20:09:54 +00:00
: set-module-flag ( module_addr val -- ) \ set and print flag
over module.flag !
dup module.name strtype
module.flag @ if ." will be loaded" else ." will not be loaded" then cr
;
This patch introduces a number of simplifications to the Forth functions used in the bootloader. The goal is to make the code more readable and smaller (especially because we have size issues in the loader's environment). High level description of the changes: + define some string manipulation functions to improve readability; + create functions to manipulate module descriptors, removing some duplicated code; + rename the error codes to ESOMETHING; + consistently use set_environment_variable (which evaluates $variables) when interpreting variable=value assignments; I have tested the code, but there might be code paths that I have not traversed so please let me know of any issues. Details of this change: --- loader.4th --- + add some module operators, to remove duplicated code while parsing module-related commands: set-module-flag enable-module disable-module toggle-module show-module --- pnp.4th --- + move here the definition related to the pnp devices list, e.g. STAILQ_* , pnpident, pnpinfo --- support.4th --- + rename error codes to capital e.g. ENOMEM EFREE ... and do obvious changes related to the renaming; + remove unused structures (those relevant to pnp are moved to pnp.4th) + various string functions - strlen removed (it is an internal function) - strchr, defined as the C function - strtype -- type a string to output - strref -- assign a reference to the string on the stack - unquote -- remove quotes from a string + remove reset_line_buffer + move up the 'set_environment_variable' function (which now uses the interpreter, so $variables are evaluated). Use the function in various places + add a 'test_file function' for debugging purposes MFC after: 4 weeks
2009-01-05 20:09:54 +00:00
: enable-module find-module ?dup if true set-module-flag then ;
: disable-module find-module ?dup if false set-module-flag then ;
: toggle-module find-module ?dup if dup module.flag @ 0= set-module-flag then ;
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\ ***** show-module
\
\ Show loading information about a module.
This patch introduces a number of simplifications to the Forth functions used in the bootloader. The goal is to make the code more readable and smaller (especially because we have size issues in the loader's environment). High level description of the changes: + define some string manipulation functions to improve readability; + create functions to manipulate module descriptors, removing some duplicated code; + rename the error codes to ESOMETHING; + consistently use set_environment_variable (which evaluates $variables) when interpreting variable=value assignments; I have tested the code, but there might be code paths that I have not traversed so please let me know of any issues. Details of this change: --- loader.4th --- + add some module operators, to remove duplicated code while parsing module-related commands: set-module-flag enable-module disable-module toggle-module show-module --- pnp.4th --- + move here the definition related to the pnp devices list, e.g. STAILQ_* , pnpident, pnpinfo --- support.4th --- + rename error codes to capital e.g. ENOMEM EFREE ... and do obvious changes related to the renaming; + remove unused structures (those relevant to pnp are moved to pnp.4th) + various string functions - strlen removed (it is an internal function) - strchr, defined as the C function - strtype -- type a string to output - strref -- assign a reference to the string on the stack - unquote -- remove quotes from a string + remove reset_line_buffer + move up the 'set_environment_variable' function (which now uses the interpreter, so $variables are evaluated). Use the function in various places + add a 'test_file function' for debugging purposes MFC after: 4 weeks
2009-01-05 20:09:54 +00:00
: show-module ( <module> -- ) find-module ?dup if show-one-module then ;
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\ Words to be used inside configuration files
: retry false ; \ For use in load error commands
: ignore true ; \ For use in load error commands
\ Return to strict forth vocabulary
: #type
over - >r
type
r> spaces
;
: .? 2 spaces 2swap 15 #type 2 spaces type cr ;
: ?
['] ? execute
s" boot-conf" s" load kernel and modules, then autoboot" .?
s" read-conf" s" read a configuration file" .?
s" enable-module" s" enable loading of a module" .?
s" disable-module" s" disable loading of a module" .?
s" toggle-module" s" toggle loading of a module" .?
s" show-module" s" show module load data" .?
;
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only forth also