Index: stable/5/sys/boot/common/loader.8 =================================================================== --- stable/5/sys/boot/common/loader.8 (revision 154823) +++ stable/5/sys/boot/common/loader.8 (revision 154824) @@ -1,928 +1,941 @@ .\" Copyright (c) 1999 Daniel C. Sobral .\" 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. .\" .\" $FreeBSD$ .\" -.Dd October 1, 2004 +.Dd August 18, 2005 .Dt LOADER 8 .Os .Sh NAME .Nm loader .Nd kernel bootstrapping final stage .Sh DESCRIPTION The program called .Nm is the final stage of .Fx Ns 's kernel bootstrapping process. On IA32 (i386) architectures, it is a .Pa BTX client. It is linked statically to .Xr libstand 3 and usually located in the directory .Pa /boot . .Pp It provides a scripting language that can be used to automate tasks, do pre-configuration or assist in recovery procedures. This scripting language is roughly divided in two main components. The smaller one is a set of commands designed for direct use by the casual user, called "builtin commands" for historical reasons. The main drive behind these commands is user-friendliness. The bigger component is an .Tn ANS Forth compatible Forth interpreter based on FICL, by .An John Sadler . .Pp During initialization, .Nm will probe for a console and set the .Va console variable, or set it to serial console .Pq Dq comconsole if the previous boot stage used that. If multiple consoles are selected, they will be listed separated by spaces. Then, devices are probed, .Va currdev and .Va loaddev are set, and .Va LINES is set to 24. Next, .Tn FICL is initialized, the builtin words are added to its vocabulary, and .Pa /boot/boot.4th is processed if it exists. No disk switching is possible while that file is being read. The inner interpreter .Nm will use with .Tn FICL is then set to .Ic interpret , which is .Tn FICL Ns 's default. After that, .Pa /boot/loader.rc is processed if available, and, failing that, .Pa /boot/boot.conf is read for historical reasons. These files are processed through the .Ic include command, which reads all of them into memory before processing them, making disk changes possible. .Pp At this point, if an .Ic autoboot has not been tried, and if .Va autoboot_delay is not set to .Dq NO (not case sensitive), then an .Ic autoboot will be tried. If the system gets past this point, .Va prompt will be set and .Nm will engage interactive mode. Please note that historically even when .Va autoboot_delay is set to .Dq 0 user will be able to interrupt autoboot process by pressing some key on the console while kernel and modules are being loaded. In some cases such behaviour may be undesirable, to prevent it set .Va autoboot_delay to .Dq -1 , in this case .Nm will engage interactive mode only if .Ic autoboot has failed. .Sh BUILTIN COMMANDS In .Nm , builtin commands take parameters from the command line. Presently, the only way to call them from a script is by using .Pa evaluate on a string. If an error condition occurs, an exception will be generated, which can be intercepted using .Tn ANS Forth exception handling words. If not intercepted, an error message will be displayed and the interpreter's state will be reset, emptying the stack and restoring interpreting mode. .Pp The builtin commands available are: .Pp .Bl -tag -width Ds -compact .It Ic autoboot Op Ar seconds Op Ar prompt Proceeds to bootstrap the system after a number of seconds, if not interrupted by the user. Displays a countdown prompt warning the user the system is about to be booted, unless interrupted by a key press. The kernel will be loaded first if necessary. Defaults to 10 seconds. .Pp .It Ic bcachestat Displays statistics about disk cache usage. For depuration only. .Pp .It Ic boot .It Ic boot Ar kernelname Op Cm ... .It Ic boot Fl flag Cm ... Immediately proceeds to bootstrap the system, loading the kernel if necessary. Any flags or arguments are passed to the kernel, but they must precede the kernel name, if a kernel name is provided. .Pp .Em WARNING : The behavior of this builtin is changed if .Xr loader.4th 8 is loaded. .Pp .It Ic echo Xo .Op Fl n .Op Aq message .Xc Displays text on the screen. A new line will be printed unless .Fl n is specified. .Pp .It Ic heap Displays memory usage statistics. For debugging purposes only. .Pp .It Ic help Op topic Op subtopic Shows help messages read from .Pa /boot/loader.help . The special topic .Em index will list the topics available. .Pp .It Ic include Ar file Op Ar Process script files. Each file, in turn, is completely read into memory, and then each of its lines is passed to the command line interpreter. If any error is returned by the interpreter, the include command aborts immediately, without reading any other files, and returns an error itself (see .Sx ERRORS ) . .Pp .It Ic load Xo .Op Fl t Ar type .Ar file Cm ... .Xc Loads a kernel, kernel loadable module (kld), or file of opaque contents tagged as being of the type .Ar type . Kernel and modules can be either in a.out or ELF format. Any arguments passed after the name of the file to be loaded will be passed as arguments to that file. Currently, argument passing does not work for the kernel. .Pp .It Ic ls Xo .Op Fl l .Op Ar path .Xc Displays a listing of files in the directory .Ar path , or the root directory if .Ar path is not specified. If .Fl l is specified, file sizes will be shown too. .Pp .It Ic lsdev Op Fl v Lists all of the devices from which it may be possible to load modules. If .Fl v is specified, more details are printed. .Pp .It Ic lsmod Op Fl v Displays loaded modules. If .Fl v is specified, more details are shown. .Pp .It Ic more Ar file Op Ar Display the files specified, with a pause at each .Va LINES displayed. .Pp .It Ic pnpscan Op Fl v Scans for Plug-and-Play devices. This is not functional at present. .Pp .It Ic read Xo .Op Fl t Ar seconds .Op Fl p Ar prompt .Op Va variable .Xc Reads a line of input from the terminal, storing it in .Va variable if specified. A timeout can be specified with .Fl t , though it will be canceled at the first key pressed. A prompt may also be displayed through the .Fl p flag. .Pp .It Ic reboot Immediately reboots the system. .Pp .It Ic set Ar variable .It Ic set Ar variable Ns = Ns Ar value Set loader's environment variables. .Pp .It Ic show Op Va variable Displays the specified variable's value, or all variables and their values if .Va variable is not specified. .Pp .It Ic unload Remove all modules from memory. .Pp .It Ic unset Va variable Removes .Va variable from the environment. .Pp .It Ic \&? Lists available commands. .El .Ss BUILTIN ENVIRONMENT VARIABLES The .Nm has actually two different kinds of .Sq environment variables. There are ANS Forth's .Em environmental queries , and a separate space of environment variables used by builtins, which are not directly available to Forth words. It is the latter type that this section covers. .Pp Environment variables can be set and unset through the .Ic set and .Ic unset builtins, and can have their values interactively examined through the use of the .Ic show builtin. Their values can also be accessed as described in .Sx BUILTIN PARSER . .Pp Notice that these environment variables are not inherited by any shell after the system has been booted. .Pp A few variables are set automatically by .Nm . Others can affect the behavior of either .Nm or the kernel at boot. Some options may require a value, while others define behavior just by being set. Both types of builtin variables are described below. .Bl -tag -width bootfile .It Va acpi_load Unset this to disable automatic loading of the ACPI module. See also .Va hint.acpi.0.disabled in .Xr device.hints 5 . .It Va autoboot_delay Number of seconds .Ic autoboot will wait before booting. If this variable is not defined, .Ic autoboot will default to 10 seconds. .Pp If set to .Dq NO , no .Ic autoboot will be automatically attempted after processing .Pa /boot/loader.rc , though explicit .Ic autoboot Ns 's will be processed normally, defaulting to 10 seconds delay. .Pp If set to .Dq 0 no delay will inserted, but user still will be able to interrupt .Ic autoboot process and escape into the interactive mode by pressing some key on the console while kernel and modules are being loaded. .Pp If set to .Dq -1 no delay will inserted and .Nm will engange interactive mode only if .Ic autoboot has failed for some reason. .It Va boot_askname Instructs the kernel to prompt the user for the name of the root device when the kernel is booted. .It Va boot_cdrom Instructs the kernel to try to mount the root file system from CD-ROM. .It Va boot_ddb Instructs the kernel to start in the DDB debugger, rather than proceeding to initialize when booted. .It Va boot_gdb Selects gdb-remote mode for the kernel debugger by default. .It Va boot_multicons Enables multiple console support in the kernel early on boot. In a running system, console configuration can be manipulated by the .Xr conscontrol 8 utility. .It Va boot_serial Force the use of a serial console even when an internal console is present. .It Va boot_single Prevents the kernel from initiating a multi-user startup; instead, a single-user mode will be entered when the kernel has finished device probing. .It Va boot_verbose Setting this variable causes extra debugging information to be printed by the kernel during the boot phase. .It Va bootfile List of semicolon-separated search path for bootable kernels. The default is .Dq Li kernel . +.It Va comconsole_speed +Defines the speed of the serial console (i386 and amd64 only). +If the previous boot stage indicated that a serial console is in use +then this variable is initialized to the current speed of the console +serial port. +Otherwise it is set to 9600 unless this was overridden using the +.Va BOOT_COMCONSOLE_SPEED +variable when +.Nm +was compiled. +Changes to the +.Va comconsole_speed +variable take effect immediately. .It Va console Defines the current console or consoles. Multiple consoles may be specified. In that case, the first listed console will become the default console for userland output (e.g. from .Xr init 8 ). .It Va currdev Selects the default device. Syntax for devices is odd. .It Va init_path Sets the list of binaries which the kernel will try to run as the initial process. The first matching binary is used. The default list is .Dq Li /sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall . .It Va interpret Has the value .Dq Li OK if the Forth's current state is interpreting. .It Va LINES Define the number of lines on the screen, to be used by the pager. .It Va module_path Sets the list of directories which will be searched for modules named in a load command or implicitly required by a dependency. The default value for this variable is .Dq Li /boot/kernel;/boot/modules . .It Va num_ide_disks Sets the number of IDE disks as a workaround for some problems in finding the root disk at boot. This has been deprecated in favor of .Va root_disk_unit . .It Va prompt Value of .Nm Ns 's prompt. Defaults to .Dq Li "${interpret}" . If variable .Va prompt is unset, the default prompt is .Ql > . .It Va root_disk_unit If the code which detects the disk unit number for the root disk is confused, e.g.\& by a mix of SCSI and IDE disks, or IDE disks with gaps in the sequence (e.g.\& no primary slave), the unit number can be forced by setting this variable. .It Va rootdev By default the value of .Va currdev is used to set the root file system when the kernel is booted. This can be overridden by setting .Va rootdev explicitly. .El .Pp Other variables are used to override kernel tunable parameters. The following tunables are available: .Bl -tag -width Va .It Va hw.physmem Limit the amount of physical memory the system will use. By default the size is in bytes, but the .Cm k , K , m , M , g and .Cm G suffixes are also accepted and indicate kilobytes, megabytes and gigabytes respectively. An invalid suffix will result in the variable being ignored by the kernel. .It Va hw.pci.enable_io_modes Enable PCI resources which are left off by some BIOSes or are not enabled correctly by the device driver. Tunable value set to ON (1) by default, but this may cause problems with some peripherals. .It Va kern.maxusers Set the size of a number of statically allocated system tables; see .Xr tuning 7 for a description of how to select an appropriate value for this tunable. When set, this tunable replaces the value declared in the kernel compile-time configuration file. .It Va kern.ipc.nmbclusters Set the number of mbuf clusters to be allocated. The value cannot be set below the default determined when the kernel was compiled. Modifies .Dv NMBCLUSTERS . .It Va kern.ipc.nsfbufs Set the number of .Xr sendfile 2 buffers to be allocated. Overrides .Dv NSFBUFS . .It Va kern.maxswzone Limits the amount of KVM to be used to hold swap meta information, which directly governs the maximum amount of swap the system can support. This value is specified in bytes of KVA space and defaults to around 70MBytes. Care should be taken to not reduce this value such that the actual amount of configured swap exceeds 1/2 the kernel-supported swap. The default 70MB allows the kernel to support a maximum of (approximately) 14GB of configured swap. Only mess around with this parameter if you need to greatly extend the KVM reservation for other resources such as the buffer cache or .Dv NMBCLUSTERS . Modifies .Dv VM_SWZONE_SIZE_MAX . .It Va kern.maxbcache Limits the amount of KVM reserved for use by the buffer cache, specified in bytes. The default maximum is 200MB. This parameter is used to prevent the buffer cache from eating too much KVM in large-memory machine configurations. Only mess around with this parameter if you need to greatly extend the KVM reservation for other resources such as the swap zone or .Dv NMBCLUSTERS . Note that the NBUF parameter will override this limit. Modifies .Dv VM_BCACHE_SIZE_MAX . .It Va machdep.disable_mtrrs Disable the use of i686 MTRRs (x86 only). .It Va net.inet.tcp.tcbhashsize Overrides the compile-time set value of .Dv TCBHASHSIZE or the preset default of 512. Must be a power of 2. .It Va vm.kmem_size Sets the size of kernel memory (bytes). This overrides the value determined when the kernel was compiled. Modifies .Dv VM_KMEM_SIZE . .El .Ss BUILTIN PARSER When a builtin command is executed, the rest of the line is taken by it as arguments, and it is processed by a special parser which is not used for regular Forth commands. .Pp This special parser applies the following rules to the parsed text: .Pp .Bl -enum .It All backslash characters are preprocessed. .Bl -bullet .It \eb , \ef , \er , \en and \et are processed as in C. .It \es is converted to a space. .It \ev is converted to .Tn ASCII 11. .It \ez is just skipped. Useful for things like .Dq \e0xf\ez\e0xf . .It \e0xN and \e0xNN are replaced by the hex N or NN. .It \eNNN is replaced by the octal NNN .Tn ASCII character. .It \e" , \e' and \e$ will escape these characters, preventing them from receiving special treatment in Step 2, described below. .It \e\e will be replaced with a single \e . .It In any other occurrence, backslash will just be removed. .El .It Every string between non-escaped quotes or double-quotes will be treated as a single word for the purposes of the remaining steps. .It Replace any .Li $VARIABLE or .Li ${VARIABLE} with the value of the environment variable .Va VARIABLE . .It Space-delimited arguments are passed to the called builtin command. Spaces can also be escaped through the use of \e\e . .El .Pp An exception to this parsing rule exists, and is described in .Sx BUILTINS AND FORTH . .Ss BUILTINS AND FORTH All builtin words are state-smart, immediate words. If interpreted, they behave exactly as described previously. If they are compiled, though, they extract their arguments from the stack instead of the command line. .Pp If compiled, the builtin words expect to find, at execution time, the following parameters on the stack: .D1 Ar addrN lenN ... addr2 len2 addr1 len1 N where .Ar addrX lenX are strings which will compose the command line that will be parsed into the builtin's arguments. Internally, these strings are concatenated in from 1 to N, with a space put between each one. .Pp If no arguments are passed, a 0 .Em must be passed, even if the builtin accepts no arguments. .Pp While this behavior has benefits, it has its trade-offs. If the execution token of a builtin is acquired (through .Ic ' or .Ic ['] ) , and then passed to .Ic catch or .Ic execute , the builtin behavior will depend on the system state .Bf Em at the time .Ic catch or .Ic execute is processed! .Ef This is particularly annoying for programs that want or need to handle exceptions. In this case, the use of a proxy is recommended. For example: .Dl : (boot) boot ; .Sh FICL .Tn FICL is a Forth interpreter written in C, in the form of a forth virtual machine library that can be called by C functions and vice versa. .Pp In .Nm , each line read interactively is then fed to .Tn FICL , which may call .Nm back to execute the builtin words. The builtin .Ic include will also feed .Tn FICL , one line at a time. .Pp The words available to .Tn FICL can be classified into four groups. The .Tn ANS Forth standard words, extra .Tn FICL words, extra .Fx words, and the builtin commands; the latter were already described. The .Tn ANS Forth standard words are listed in the .Sx STANDARDS section. The words falling in the two other groups are described in the following subsections. .Ss FICL EXTRA WORDS .Bl -tag -width wid-set-super .It Ic .env .It Ic .ver .It Ic -roll .It Ic 2constant .It Ic >name .It Ic body> .It Ic compare This is the STRING word set's .Ic compare . .It Ic compile-only .It Ic endif .It Ic forget-wid .It Ic parse-word .It Ic sliteral This is the STRING word set's .Ic sliteral . .It Ic wid-set-super .It Ic w@ .It Ic w! .It Ic x. .It Ic empty .It Ic cell- .It Ic -rot .El .Ss FREEBSD EXTRA WORDS .Bl -tag -width XXXXXXXX .It Ic \&$ Pq -- Evaluates the remainder of the input buffer, after having printed it first. .It Ic \&% Pq -- Evaluates the remainder of the input buffer under a .Ic catch exception guard. .It Ic .# Works like .Ic . but without outputting a trailing space. .It Ic fclose Pq Ar fd -- Closes a file. .It Ic fkey Pq Ar fd -- char Reads a single character from a file. .It Ic fload Pq Ar fd -- Processes a file .Em fd . .It Ic fopen Pq Ar addr len mode Li -- Ar fd Opens a file. Returns a file descriptor, or \-1 in case of failure. The .Ar mode parameter selects whether the file is to be opened for read access, write access, or both. The constants .Dv O_RDONLY , O_WRONLY , and .Dv O_RDWR are defined in .Pa /boot/support.4th , indicating read only, write only, and read-write access, respectively. .It Xo .Ic fread .Pq Ar fd addr len -- len' .Xc Tries to read .Em len bytes from file .Em fd into buffer .Em addr . Returns the actual number of bytes read, or -1 in case of error or end of file. .It Ic heap? Pq -- Ar cells Return the space remaining in the dictionary heap, in cells. This is not related to the heap used by dynamic memory allocation words. .It Ic inb Pq Ar port -- char Reads a byte from a port. .It Ic key Pq -- Ar char Reads a single character from the console. .It Ic key? Pq -- Ar flag Returns .Ic true if there is a character available to be read from the console. .It Ic ms Pq Ar u -- Waits .Em u microseconds. .It Ic outb Pq Ar port char -- Writes a byte to a port. .It Ic seconds Pq -- Ar u Returns the number of seconds since midnight. .It Ic tib> Pq -- Ar addr len Returns the remainder of the input buffer as a string on the stack. .It Ic trace! Pq Ar flag -- Activates or deactivates tracing. Does not work with .Ic catch . .El .Ss FREEBSD DEFINED ENVIRONMENTAL QUERIES .Bl -tag -width Ds .It arch-i386 .Ic TRUE if the architecture is IA32. .It arch-alpha .Ic TRUE if the architecture is AXP. .It FreeBSD_version .Fx version at compile time. .It loader_version .Nm version. .El .Ss SYSTEM DOCUMENTATION .Sh FILES .Bl -tag -width /boot/defaults/loader.conf -compact .It Pa /boot/loader .Nm itself. .It Pa /boot/boot.4th Additional .Tn FICL initialization. .It Pa /boot/boot.conf .Nm bootstrapping script. Deprecated. .It Pa /boot/defaults/loader.conf .It Pa /boot/loader.conf .It Pa /boot/loader.conf.local .Nm configuration files, as described in .Xr loader.conf 5 . .It Pa /boot/loader.rc .Nm bootstrapping script. .It Pa /boot/loader.help Loaded by .Ic help . Contains the help messages. .El .Sh EXAMPLES Boot in single user mode: .Pp .Dl boot -s .Pp Load the kernel, a splash screen, and then autoboot in five seconds. Notice that a kernel must be loaded before any other .Ic load command is attempted. .Bd -literal -offset indent load kernel load splash_bmp load -t splash_image_data /boot/chuckrulez.bmp autoboot 5 .Ed .Pp Set the disk unit of the root device to 2, and then boot. This would be needed in a system with two IDE disks, with the second IDE disk hardwired to wd2 instead of wd1. .Bd -literal -offset indent set root_disk_unit=2 boot /kernel .Ed .Pp See also: .Bl -tag -width /usr/share/examples/bootforth/X .It Pa /boot/loader.4th Extra builtin-like words. .It Pa /boot/support.4th .Pa loader.conf processing words. .It Pa /usr/share/examples/bootforth/ Assorted examples. .El .Sh ERRORS The following values are thrown by .Nm : .Bl -tag -width XXXXX -offset indent .It 100 Any type of error in the processing of a builtin. .It -1 .Ic Abort executed. .It -2 .Ic Abort" executed. .It -56 .Ic Quit executed. .It -256 Out of interpreting text. .It -257 Need more text to succeed -- will finish on next run. .It -258 .Ic Bye executed. .It -259 Unspecified error. .El .Sh SEE ALSO .Xr libstand 3 , .Xr loader.conf 5 , .Xr tuning 7 , .Xr boot 8 , .Xr btxld 8 .Sh STANDARDS For the purposes of ANS Forth compliance, loader is an .Bf Em ANS Forth System with Environmental Restrictions, Providing .Ef .Bf Li .No .( , .No :noname , .No ?do , parse, pick, roll, refill, to, value, \e, false, true, .No <> , .No 0<> , compile\&, , erase, nip, tuck .Ef .Em and .Li marker .Bf Em from the Core Extensions word set, Providing the Exception Extensions word set, Providing the Locals Extensions word set, Providing the Memory-Allocation Extensions word set, Providing .Ef .Bf Li \&.s, bye, forget, see, words, \&[if], \&[else] .Ef .Em and .Li [then] .Bf Em from the Programming-Tools extension word set, Providing the Search-Order extensions word set. .Ef .Sh HISTORY The .Nm first appeared in .Fx 3.1 . .Sh AUTHORS .An -nosplit The .Nm was written by .An Michael Smith Aq msmith@FreeBSD.org . .Pp .Tn FICL was written by .An John Sadler Aq john_sadler@alum.mit.edu . .Sh BUGS The .Ic expect and .Ic accept words will read from the input buffer instead of the console. The latter will be fixed, but the former will not. Index: stable/5/sys/boot/forth/loader.conf =================================================================== --- stable/5/sys/boot/forth/loader.conf (revision 154823) +++ stable/5/sys/boot/forth/loader.conf (revision 154824) @@ -1,364 +1,365 @@ # This is loader.conf - a file full of useful variables that you can # set to change the default load behavior of your system. You should # not edit this file! Put any overrides into one of the # loader_conf_files instead and you will be able to update these # defaults later without spamming your local configuration information. # # All arguments must be in double quotes. # # $FreeBSD$ ############################################################## ### Basic configuration options ############################ ############################################################## exec=".( Loading /boot/defaults/loader.conf ) cr" kernel="kernel" # /boot sub-directory containing kernel and modules bootfile="kernel" # Kernel name (possibly absolute path) kernel_options="" # Flags to be passed to the kernel loader_conf_files="/boot/device.hints /boot/loader.conf /boot/loader.conf.local" nextboot_conf="/boot/nextboot.conf" nextboot_enable="NO" verbose_loading="NO" # Set to YES for verbose loader output ############################################################## ### Splash screen configuration ############################ ############################################################## splash_bmp_load="NO" # Set this to YES for bmp splash screen! splash_pcx_load="NO" # Set this to YES for pcx splash screen! vesa_load="NO" # Set this to YES to load the vesa module bitmap_load="NO" # Set this to YES if you want splash screen! bitmap_name="splash.bmp" # Set this to the name of the bmp or pcx file bitmap_type="splash_image_data" # and place it on the module_path ############################################################## ### Loader settings ######################################## ############################################################## #autoboot_delay="10" # Delay in seconds before autobooting, # set to -1 if you don't want user to be # allowed to interrupt autoboot process and # escape to the loader prompt #beastie_disable="NO" # Turn the beastie boot menu on and off -#console="vidconsole" # Set the current console +#comconsole_speed="9600" # Set the current serial console speed +#console="vidconsole" # A comma separated list of console(s) #currdev="disk1s1a" # Set the current device module_path="/boot/modules" # Set the module search path #prompt="\\${interpret}" # Set the command prompt #root_disk_unit="0" # Force the root disk unit number #rootdev="disk1s1a" # Set the root filesystem ############################################################## ### Kernel settings ######################################## ############################################################## # The following boot_ variables are enabled # by setting them to any value. #boot_askname="" # Prompt the user for the name of the root device #boot_cdrom="" # Attempt to mount root file system from CD-ROM #boot_ddb="" # Instructs the kernel to start in the DDB debugger #boot_gdb="" # Selects gdb-remote mode for the kernel debugger #boot_multicons="" # Use multiple consoles #boot_serial="" # Use serial console #boot_single="" # Start system in single-user mode #boot_verbose="" # Causes extra debugging information to be printed #init_path="/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init:/stand/sysinstall" # Sets the list of init candidates ############################################################## ### Kernel tunables ######################################## ############################################################## #hw.physmem="1G" # Limit physical memory. See loader(8) #kern.dfldsiz="" # Set the initial data size limit #kern.dflssiz="" # Set the initial stack size limit #kern.hz="100" # Set the kernel interval timer rate #kern.maxbcache="" # Set the max buffer cache KVA storage #kern.maxdsiz="" # Set the max data size #kern.maxfiles="" # Set the sys. wide open files limit #kern.maxproc="" # Set the maximum # of processes #kern.maxssiz="" # Set the max stack size #kern.maxswzone="" # Set the max swmeta KVA storage #kern.maxtsiz="" # Set the max text size #kern.maxusers="32" # Set size of various static tables #kern.nbuf="" # Set the number of buffer headers #kern.ncallout="" # Set the maximum # of timer events #kern.sgrowsiz="" # Set the amount to grow stack #kern.cam.scsi_delay="2000" # Delay (in ms) before probing SCSI #kern.ipc.maxsockets="" # Set the maximum number of sockets avaliable #kern.ipc.nmbclusters="" # Set the number of mbuf clusters #kern.ipc.nmbufs="" # Set the maximum number of mbufs #kern.ipc.nsfbufs="" # Set the number of sendfile(2) bufs #net.inet.tcp.tcbhashsize="" # Set the value of TCBHASHSIZE #vfs.root.mountfrom="" # Specify root partition in a way the # kernel understands #vm.kmem_size="" # Sets the size of kernel memory (bytes) #debug.ktr.cpumask="0xf" # Bitmask of CPUs to enable KTR on #debug.ktr.mask="0x1200" # Bitmask of KTR events to enable #debug.ktr.verbose="1" # Enable console dump of KTR events #net.graph.maxalloc="128" # Maximum number of queue items to allocate ############################################################## ### Filesystem and related modules ######################### ############################################################## # Filesystems cd9660_load="NO" # ISO 9660 filesystem coda_load="NO" # CODA filesystem fdescfs_load="NO" # Filedescriptors filesystem linprocfs_load="NO" # Linux compatibility process filesystem msdosfs_load="NO" # FAT-12/16/32 nfsclient_load="NO" # NFS client nfsserver_load="NO" # NFS server ntfs_load="NO" # NTFS nullfs_load="NO" # Null filesystem portalfs_load="NO" # Portal filesystem procfs_load="NO" # Process filesystem #umapfs_load="NO" # User-id map filesystem unionfs_load="NO" # Union filesystem # Related stuff geom_ccd_load="NO" # Concatenated disk driver vinum_load="NO" # Concatenated/mirror/raid driver geom_vinum_load="NO" # Concatenated/mirror/raid driver g_md_load="NO" # Memory disk driver (vnode/swap/malloc) ############################################################## ### Screen saver modules ################################### ############################################################## # This is best done in rc.conf screensave_load="NO" # Set to YES to load a screensaver module screensave_name="green_saver" # Set to the name of the screensaver module ############################################################## ### Emulation modules ###################################### ############################################################## ibcs2_load="NO" # IBCS2 (SCO) emulation ibcs2_coff_load="NO" linux_load="NO" # Linux emulation svr4_load="NO" # SystemV R4 emulation streams_load="NO" # System V streams module ############################################################## ### Networking modules ##################################### ############################################################## if_disc_load="NO" # Discard device if_ef_load="NO" # pseudo-device providing support for multiple ethernet frame types if_faith_load="NO" # IPv6-to-IPv4 TCP relay capturing interface if_gif_load="NO" # generic tunnel interface if_gre_load="NO" # encapsulating network device if_ppp_load="NO" # Kernel ppp if_sl_load="NO" # SLIP if_stf_load="NO" # 6to4 tunnel interface if_tap_load="NO" # Ethernet tunnel software network interface if_tun_load="NO" # Tunnel driver (user process ppp) if_vlan_load="NO" # IEEE 802.1Q VLAN network interface ipfw_load="NO" # Firewall pf_load="NO" # packet filter ############################################################## ### Networking drivers ##################################### ############################################################## miibus_load="NO" # miibus support, needed for some drivers if_an_load="NO" # Aironet 4500/4800 802.11 wireless NICs if_ar_load="NO" # Digi SYNC/570i if_awi_load="NO" # AMD PCnetMobile IEEE 802.11 wireless NICs if_bfe_load="NO" # Broadcom BCM4401 if_bge_load="NO" # Broadcom BCM570x PCI gigabit ethernet if_cm_load="NO" # SMC (90c26, 90c56, 90c66) if_dc_load="NO" # DEC/Intel 21143 and various workalikes if_de_load="NO" # DEC DC21x4x ethernet if_ed_load="NO" # National Semiconductor DS8390/WD83C690 ethernet if_el_load="NO" # 3Com Etherlink 3C501 if_em_load="NO" # Intel(R) PRO/1000 gigabit ethernet if_en_load="NO" # Midway-based ATM interfaces if_ep_load="NO" # 3Com Etherlink III (3c5x9) if_ex_load="NO" # Intel EtherExpress Pro/10 ethernet if_fe_load="NO" # Fujitsu MB86960A/MB86965A based Ethernet adapters if_fxp_load="NO" # Intel EtherExpress PRO/100B (82557, 82558) if_gx_load="NO" # Intel Pro/1000 gigabit ethernet if_ie_load="NO" # Intel 82586 if_lge_load="NO" # Level 1 LXT1001 NetCellerator PCI gigabit ethernet if_lnc_load="NO" # AMD Lance/PCnet Ethernet if_my_load="NO" # Myson PCI fast ethernet if_nge_load="NO" # National Semiconductor PCI gigabit ethernet if_oltr_load="NO" # Olicom if_pcn_load="NO" # AMD PCnet PCI if_ray_load="NO" # Raytheon Raylink/Webgear Aviator PCCard if_re_load="NO" # RealTek 8139C+/8169/8169S/8110S if_rl_load="NO" # RealTek 8129/8139 if_sbni_load="NO" # Granch SBNI12 leased line adapters if_sf_load="NO" # Adaptec Duralink PCI (AIC-6915 "starfire") if_sis_load="NO" # Silicon Integrated Systems SiS 900/7016 if_sk_load="NO" # SysKonnect SK-984x series PCI gigabit ethernet if_sn_load="NO" # SMC 91Cxx if_sr_load="NO" # synchronous RISCom/N2 / WANic 400/405 if_ste_load="NO" # Sundance Technologies ST201 fast ethernet if_ti_load="NO" # Alteon Networks Tigon 1 and Tigon 2 if_tl_load="NO" # Texas Instruments TNETE100 ("ThunderLAN") if_tx_load="NO" # SMC 83c17x fast ethernet if_txp_load="NO" # 3Com 3XP Typhoon/Sidewinder (3CR990) if_vge_load="NO" # VIA VT6122 PCI Gigabit Ethernet if_vr_load="NO" # VIA Rhine I and Rhine II if_vx_load="NO" # 3Com 3C590 family if_wb_load="NO" # Winbond W89C840F if_wi_load="NO" # WaveLAN/IEEE 802.11 wireless NICs if_wx_load="NO" # Intel Gigabit Ethernet if_xe_load="NO" # Xircom CreditCard PCMCIA if_xl_load="NO" # 3Com Etherlink XL (3c900, 3c905, 3c905B) ############################################################## ### Netgraph modules ####################################### ############################################################## ng_UI_load="NO" # UI netgraph node type ng_async_load="NO" # asynchronous framing netgraph node type ng_bpf_load="NO" # Berkeley packet filter netgraph node type ng_bridge_load="NO" # Ethernet bridging netgraph node type ng_cisco_load="NO" # Cisco HDLC protocol netgraph node type ng_echo_load="NO" # Netgraph echo node type ng_eiface_load="NO" # generic Ethernet interface netgraph node type ng_etf_load="NO" # Ethertype filtering netgraph node type ng_ether_load="NO" # Ethernet netgraph node type ng_fec_load="NO" # netgraph Fast EtherChannel node ng_frame_relay_load="NO" # frame relay netgraph node type ng_gif_load="NO" # generic tunnel interface netgraph node type ng_gif_demux_load="NO" # demultiplexer for packets from ng_gif(4) nodes ng_hole_load="NO" # Netgraph discard node type ng_hub_load="NO" # packet distribution netgraph node type ng_iface_load="NO" # interface Netgraph node type ng_ip_input_load="NO" # netgraph IP input node type ng_ksocket_load="NO" # kernel socket netgraph node type ng_l2tp_load="NO" # L2TP protocol netgraph node type ng_lmi_load="NO" # frame relay LMI protocol netgraph node type ng_mppc_load="NO" # Microsoft MPPC/MPPE compression and encryption netgraph node type ng_netflow_load="NO" # Cisco's NetFlow netgraph note type ng_one2many_load="NO" # packet multiplexing netgraph node type ng_ppp_load="NO" # PPP protocol netgraph node type ng_pppoe_load="NO" # RFC 2516 PPPOE protocol netgraph node type ng_pptpgre_load="NO" # PPTP GRE protocol netgraph node type ng_rfc1490_load="NO" # RFC 1490 netgraph node type ng_socket_load="NO" # Netgraph socket node type ng_split_load="NO" # netgraph node to separate incoming and outgoing flows ng_sppp_load="NO" # sppp netgraph node type ng_tee_load="NO" # Netgraph ``tee'' node type ng_tty_load="NO" # Netgraph node type that is also a line discipline ng_vjc_load="NO" # Van Jacobsen compression netgraph node type ng_vlan_load="NO" # IEEE 802.1Q VLAN tagging netgraph node type ############################################################## ### Sound modules ########################################## ############################################################## sound_load="NO" # Digital sound subsystem snd_ad1816_load="NO" # ad1816 snd_als4000_load="NO" # als4000 snd_cmi_load="NO" # cmi snd_cs4281_load="NO" # cs4281 snd_csa_load="NO" # csa snd_ds1_load="NO" # ds1 snd_emu10k1_load="NO" # Creative Sound Blaster Live snd_es137x_load="NO" # es137x snd_ess_load="NO" # ess snd_fm801_load="NO" # fm801 snd_ich_load="NO" # Intel ICH snd_maestro_load="NO" # Maestro snd_maestro3_load="NO" # Maestro3 snd_mss_load="NO" # Mss snd_neomagic_load="NO" # Neomagic snd_sb16_load="NO" # Sound Blaster 16 snd_sb8_load="NO" # Sound Blaster Pro snd_sbc_load="NO" # Sbc snd_solo_load="NO" # Solo snd_t4dwave_load="NO" # t4dwave snd_via8233_load="NO" # via8233 snd_via82c686_load="NO" # via82c686 snd_vibes_load="NO" # vibes snd_driver_load="NO" # All sound drivers ############################################################## ### USB modules ############################################ ############################################################## usb_load="NO" # USB subsystem udbp_load="NO" # USB double bulk pipe host 2 host cables ugen_load="NO" # USB generic device, if all else fails ... ufm_load="NO" # Fm Radio uhid_load="NO" # Human Interface Devices ukbd_load="NO" # Keyboard ulpt_load="NO" # Printer ums_load="NO" # Mouse umass_load="NO" # Mass Storage Devices umodem_load="NO" # Modems uscanner_load="NO" # Scanners if_aue_load="NO" # ADMtek USB ethernet if_axe_load="NO" # ASIX Electronics AX88172 USB ethernet if_cue_load="NO" # CATC USB ethernet if_kue_load="NO" # Kawasaki LSI USB ethernet snd_uaudio_load="NO" # USB audio ############################################################## ### Other modules ########################################## ############################################################## bktr_load="NO" # Brooktree Bt848/Bt878 TV/Video Capture Card ispfw_load="NO" # Qlogic ISP Firmware agp_load="NO" # agp module accf_data_load="NO" # Wait for data accept filter accf_http_load="NO" # Wait for full HTTP request accept filter random_load="NO" # Random device speaker_load="NO" # AT speaker module ############################################################## ### ACPI settings ########################################## ############################################################## acpi_dsdt_load="NO" # DSDT Overriding acpi_dsdt_type="acpi_dsdt" # Don't change this acpi_dsdt_name="/boot/acpi_dsdt.aml" # Override DSDT in BIOS by this file acpi_video_load="NO" # Load the ACPI video extension driver ############################################################## ### TrustedBSD MAC settings ################################## ############################################################## mac_biba_load="NO" # Biba MAC policy mac_bsdextended_load="NO" # BSD/extended MAC policy mac_ifoff="NO" # Interface silencing policy mac_mls_load="NO" # MLS MAC policy mac_none_load="NO" # Null MAC policy mac_partition_load="NO" # Partition MAC policy mac_seeotheruids_load="NO" # UID visbility MAC policy ############################################################## ### Module loading syntax example ########################## ############################################################## #module_load="YES" # loads module "module" #module_name="realname" # uses "realname" instead of "module" #module_type="type" # passes "-t type" to load #module_flags="flags" # passes "flags" to the module #module_before="cmd" # executes "cmd" before loading the module #module_after="cmd" # executes "cmd" after loading the module #module_error="cmd" # executes "cmd" if load fails Index: stable/5/sys/boot/forth/loader.conf.5 =================================================================== --- stable/5/sys/boot/forth/loader.conf.5 (revision 154823) +++ stable/5/sys/boot/forth/loader.conf.5 (revision 154824) @@ -1,225 +1,237 @@ .\" Copyright (c) 1999 Daniel C. Sobral .\" 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. .\" .\" $FreeBSD$ -.Dd September 30, 2004 +.Dd August 18, 2005 .Dt LOADER.CONF 5 .Os .Sh NAME .Nm loader.conf .Nd "system bootstrap configuration information" .Sh DESCRIPTION The file .Nm contains descriptive information on bootstrapping the system. Through it you can specify the kernel to be booted, parameters to be passed to it, and additional modules to be loaded; and generally set all variables described in .Xr loader 8 . .Pp The file .Pa /boot/loader.rc must contain the following two lines for .Nm to be automatically processed: .Pp .Dl include /boot/loader.4th .Dl start .Pp If no .Pa /boot/loader.rc exists at installworld time, one with the above lines will be installed. .Sh SYNTAX Though .Nm Ns 's format was defined explicitly to resemble .Xr rc.conf 5 , and can be sourced by .Xr sh 1 , some settings are treated in a special fashion. Also, the behavior of some settings is defined by the setting's suffix; the prefix identifies which module the setting controls. .Pp The general parsing rules are: .Bl -bullet .It Spaces and empty lines are ignored. .It A # sign will mark the remainder of the line as a comment. .It Only one setting can be present on each line. .El .Pp All settings have the following format: .Pp .Dl variable="value" .Pp Unless it belongs to one of the classes of settings that receive special treatment, a setting will set the value of a .Xr loader 8 environment variable. The settings that receive special treatment are listed below. Settings beginning with .Qq * below define the modules to be loaded and may have any prefix; the prefix identifies a module. All such settings sharing a common prefix refer to the same module. .Bl -tag -width Ar .It Ar exec Immediately executes a .Xr loader 8 command. This type of setting cannot be processed by programs other than .Xr loader 8 , so its use should be avoided. Multiple instances of it will be processed independently. .It Ar loader_conf_files Defines additional configuration files to be processed right after the present file. .It Ar kernel Name of the kernel to be loaded. If no kernel name is set, no additional modules will be loaded. .It Ar kernel_options Flags to be passed to the kernel. .It Ar password Provides a password to be required by check-password before execution is allowed to continue. .It Ar verbose_loading If set to .Dq YES , module names will be displayed as they are loaded. .It Ar *_load If set to .Dq YES , that module will be loaded. If no name is defined (see below), the module's name is taken to be the same as the prefix. .It Ar *_name Defines the name of the module. .It Ar *_type Defines the module's type. If none is given, it defaults to a kld module. .It Ar *_flags Flags and parameters to be passed to the module. .It Ar *_before Commands to be executed before the module is loaded. Use of this setting should be avoided. .It Ar *_after Commands to be executed after the module is loaded. Use of this setting should be avoided. .It Ar *_error Commands to be executed if the loading of a module fails. Except for the special value .Dq abort , which aborts the bootstrap process, use of this setting should be avoided. .El .Pp .Em WARNING: developers should never use these suffixes for any kernel environment variables (tunables) or conflicts will result. .Sh DEFAULT SETTINGS Most of .Nm Ns 's default settings can be ignored. The few of them which are important or useful are: .Bl -tag -width bootfile -offset indent .It Va bitmap_load .Pq Dq NO If set to .Dq YES , a bitmap will be loaded to be displayed on screen while booting. .It Va bitmap_name .Pq Dq Pa /boot/splash.bmp Name of the bitmap to be loaded. Any other name can be used. +.It Va comconsole_speed +.Po Dq 9600 +or the value of the +.Va BOOT_COMCONSOLE_SPEED +variable when +.Xr loader 8 +was compiled +.Pc . +Sets the speed of the serial console. +If the previous boot loader stage specified that a serial console +is in use then the default speed is determined from the current +serial port speed setting. .It Va console .Pq Dq vidconsole .Dq comconsole selects serial console, .Dq vidconsole selects the video console, and .Dq nullconsole selects a mute console (useful for systems with neither a video console nor a serial port). .It Va kernel .Pq Dq Pa /boot/kernel/kernel .It Va loader_conf_files .Pq Dq Pa /boot/loader.conf /boot/loader.conf.local .It Va splash_bmp_load .Pq Dq NO If set to .Dq YES , will load the splash screen module, making it possible to display a bmp image on the screen while booting. .It Va splash_pcx_load .Pq Dq NO If set to .Dq YES , will load the splash screen module, making it possible to display a pcx image on the screen while booting. .It Va vesa_load .Pq Dq NO If set to .Dq YES , the vesa module will be loaded, enabling bitmaps above VGA resolution to be displayed. .El .Sh FILES .Bl -tag -width /boot/defaults/loader.conf -compact .It Pa /boot/defaults/loader.conf default settings -- do not change this file. .It Pa /boot/loader.4th defines the commands used by loader to read and process .Nm . .It Pa /boot/loader.conf user defined settings. .It Pa /boot/loader.conf.local machine-specific settings for sites with a common loader.conf. .It Pa /boot/loader.rc contains the instructions to automatically process .Nm . .El .Sh SEE ALSO .Xr boot 8 , .Xr loader 8 , .Xr loader.4th 8 .Sh HISTORY The file .Nm first appeared in .Fx 3.2 . .Sh AUTHORS This manual page was written by .An Daniel C. Sobral Aq dcs@FreeBSD.org . Index: stable/5/sys/boot/i386/libi386/comconsole.c =================================================================== --- stable/5/sys/boot/i386/libi386/comconsole.c (revision 154823) +++ stable/5/sys/boot/i386/libi386/comconsole.c (revision 154824) @@ -1,114 +1,213 @@ /*- * Copyright (c) 1998 Michael Smith (msmith@freebsd.org) * * 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include "libi386.h" #define COMC_FMT 0x3 /* 8N1 */ #define COMC_TXWAIT 0x40000 /* transmit timeout */ #define COMC_BPS(x) (115200 / (x)) /* speed to DLAB divisor */ +#define COMC_DIV2BPS(x) (115200 / (x)) /* DLAB divisor to speed */ #ifndef COMPORT #define COMPORT 0x3f8 #endif #ifndef COMSPEED #define COMSPEED 9600 #endif static void comc_probe(struct console *cp); static int comc_init(int arg); static void comc_putchar(int c); static int comc_getchar(void); +static int comc_getspeed(void); static int comc_ischar(void); +static int comc_parsespeed(const char *string); +static void comc_setup(int speed); +static int comc_speed_set(struct env_var *ev, int flags, + const void *value); static int comc_started; +static int comc_curspeed; struct console comconsole = { "comconsole", "serial port", 0, comc_probe, comc_init, comc_putchar, comc_getchar, comc_ischar }; static void comc_probe(struct console *cp) { + char speedbuf[16]; + char *cons, *speedenv; + int speed; + /* XXX check the BIOS equipment list? */ cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT); + + if (comc_curspeed == 0) { + comc_curspeed = COMSPEED; + /* + * Assume that the speed was set by an earlier boot loader if + * comconsole is already the preferred console. + */ + cons = getenv("console"); + if ((cons != NULL && strcmp(cons, comconsole.c_name) == 0) || + getenv("boot_multicons") != NULL) { + comc_curspeed = comc_getspeed(); + } + speedenv = getenv("comconsole_speed"); + if (speedenv != NULL) { + speed = comc_parsespeed(speedenv); + if (speed > 0) + comc_curspeed = speed; + } + + sprintf(speedbuf, "%d", comc_curspeed); + unsetenv("comconsole_speed"); + env_setenv("comconsole_speed", EV_VOLATILE, speedbuf, comc_speed_set, + env_nounset); + } } static int comc_init(int arg) { if (comc_started && arg == 0) return 0; comc_started = 1; - outb(COMPORT + com_cfcr, CFCR_DLAB | COMC_FMT); - outb(COMPORT + com_dlbl, COMC_BPS(COMSPEED) & 0xff); - outb(COMPORT + com_dlbh, COMC_BPS(COMSPEED) >> 8); - outb(COMPORT + com_cfcr, COMC_FMT); - outb(COMPORT + com_mcr, MCR_RTS | MCR_DTR); + comc_setup(comc_curspeed); - do - inb(COMPORT + com_data); - while (inb(COMPORT + com_lsr) & LSR_RXRDY); - return(0); } static void comc_putchar(int c) { int wait; for (wait = COMC_TXWAIT; wait > 0; wait--) if (inb(COMPORT + com_lsr) & LSR_TXRDY) { outb(COMPORT + com_data, (u_char)c); break; } } static int comc_getchar(void) { return(comc_ischar() ? inb(COMPORT + com_data) : -1); } static int comc_ischar(void) { return(inb(COMPORT + com_lsr) & LSR_RXRDY); +} + +static int +comc_speed_set(struct env_var *ev, int flags, const void *value) +{ + int speed; + + if (value == NULL || (speed = comc_parsespeed(value)) <= 0) { + printf("Invalid speed\n"); + return (CMD_ERROR); + } + + if (comc_started && comc_curspeed != speed) + comc_setup(speed); + + env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); + + return (CMD_OK); +} + +static void +comc_setup(int speed) +{ + + comc_curspeed = speed; + + outb(COMPORT + com_cfcr, CFCR_DLAB | COMC_FMT); + outb(COMPORT + com_dlbl, COMC_BPS(speed) & 0xff); + outb(COMPORT + com_dlbh, COMC_BPS(speed) >> 8); + outb(COMPORT + com_cfcr, COMC_FMT); + outb(COMPORT + com_mcr, MCR_RTS | MCR_DTR); + + do + inb(COMPORT + com_data); + while (inb(COMPORT + com_lsr) & LSR_RXRDY); +} + +static int +comc_parsespeed(const char *speedstr) +{ + char *p; + int speed; + + speed = strtol(speedstr, &p, 0); + if (p == speedstr || *p != '\0' || speed <= 0) + return (-1); + + return (speed); +} + +static int +comc_getspeed(void) +{ + u_int divisor; + u_char dlbh; + u_char dlbl; + u_char cfcr; + + cfcr = inb(COMPORT + com_cfcr); + outb(COMPORT + com_cfcr, CFCR_DLAB | cfcr); + + dlbl = inb(COMPORT + com_dlbl); + dlbh = inb(COMPORT + com_dlbh); + + outb(COMPORT + com_cfcr, cfcr); + + divisor = dlbh << 8 | dlbl; + + /* XXX there should be more sanity checking. */ + if (divisor == 0) + return (COMSPEED); + return (COMC_DIV2BPS(divisor)); }