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diff --git a/Documentation/RFC/config.tex b/Documentation/RFC/config.tex deleted file mode 100644 index c11e62219d..0000000000 --- a/Documentation/RFC/config.tex +++ /dev/null @@ -1,290 +0,0 @@ - New config language for LinuxBIOS - -\begin{abstract} -We describe the new configuration language for LinuxBIOS. -\end{abstract} - -\section{Scope} -This document defines the new configuration language for LinuxBIOS. - -\section{Goals} -The goals of the new language are these: -\begin{itemize} -\item Simplified Makefiles so people can see what is set -\item Move from the regular-expression-based language to something -a bit more comprehensible and flexible -\item make the specification easier for people to use and understand -\item allow unique register-set-specifiers for each chip -\item allow generic register-set-specifiers for each chip -\item generate static initialization code, as needed, for the -specifiers. -\end{itemize} - -\section{Language} -Here is the new language. It is very similar to the old one, differing -in only a few respects. It borrows heavily from Greg Watson's suggestions. - -I am presenting it in a pseudo-BNF in the hopes it will be easier. Things -in '' are keywords; things in ``'' are strings in the actual text. -\begin{verbatim} -#exprs are composed of factor or factor + factor etc. -expr ::= factor ( ``+'' factor | ``-'' factor | )* -#factors are term or term * term or term / term or ... -factor ::= term ( ``*'' term | ``/'' term | ... )* -# -unary-op ::= ``!'' ID -# term is a number, hexnumber, ID, unary-op, or a full-blown expression -term ::= NUM | XNUM | ID | unary-op | ``(`` expr ``)'' - -# Option command. Can be an expression or quote-string. -# Options are used in the config tool itself (in expressions and 'if') -# and are also passed to the C compiler when building linuxbios. -# It is an error to have two option commands in a file. -# It is an error to have an option command after the ID has been used -# in an expression (i.e. 'set after used' is an error) -option ::= 'option' ID '=' (``value'' | term) - -# Default command. The ID is set to this value if no option command -# is scanned. -# Multiple defaults for an ID will produce warning, but not errors. -# It is OK to scan a default command after use of an ID. -# Options always over-ride defaults. -default ::= 'default' ID '=' (``value'' | term) - -# the mainboard, southbridge, northbridge commands -# cause sourcing of Config.lb files as in the old config tool -# as parts are sourced, a device tree is built. The structure -# of the tree is determined by the structure of the components -# as they are specified. To attach a superio to a southbridge, for -# example, one would do this: -# southbridge acer/5432 -# superio nsc/123 -# end -# end -# the tool generates static initializers for this hierarchy. - -# add C code to the current component (motherboard, etc. ) -# to initialise the component-INDEPENDENT structure members -init ::= 'init' ``CODE'' - -# add C code to the current component (motherboard, etc. ) -# to initialise the component-DEPENDENT structure members -register ::= 'register' ``CODE'' - - -# mainboard command -# statements in this block will set variables controlling the mainboard, -# and will also place components (northbridge etc.) in the device tree -# under this mainboard -mainboard ::= 'mainboard' PATH (statements)* 'end' - -# standard linuxbios commands -southbridge ::= 'southbridge' PATH (statemnts)* 'end' -northbridge ::= 'northbridge' PATH (statemnts)* 'end' -superio ::= 'superio PATH (statemnts)* 'end' -cpu ::= 'cpu' PATH (statemnts)* 'end' -arch ::= 'arch' PATH (statemnts)* 'end' - -# files for building linuxbios -# include a file in crt0.S -mainboardinit ::= 'mainboardinit' PATH - -# object file -object ::= 'object' PATH -# driver objects are just built into the image in a different way -driver ::= 'driver' PATH - -# Use the Config.lb file in the PATH -dir ::= 'dir' PATH - -# add a file to the set of ldscript files -ldscript ::= 'ldscript' PATH - -# dependencies or actions for the makerule command -dep ::= 'dep' ``dependency-string'' -act ::= 'act' ``actions'' -depsacts ::= (dep | act)* -# set up a makerule -# -makerule ::= 'makerule' PATH depsacts - -#defines for use in makefiles only -# note usable in the config tool, not passed to cc -makedefine ::= 'makedefine' ``RAWTEXT'' - -# add an action to an existing make rule -addaction ::= 'addaction' PATH ``ACTION'' - -# statements -statement ::= - option - | default - | cpu - | arch - | northbridge - | southbridge - | superio - | object - | driver - | mainboardinit - | makerule - | makedefine - | addaction - | init - | register - | iif - | dir - | ldscript - -statements ::= (statement)* - -# target directory specification -target ::= 'target' PATH - -# and the whole thing -board ::= target (option)* mainboard - -\end{verbatim} - -\subsubsection{Command definitions} -\subsubsubsection{option} -\subsubsubsection{default} -\subsubsubsection{cpu} -\subsubsubsection{arch} -\subsubsubsection{northbridge} -\subsubsubsection{southbridge} -\subsubsubsection{superio} -\subsubsubsection{object} -\subsubsubsection{driver} -\subsubsubsection{mainboardinit} -\subsubsubsection{makerule} -\subsubsubsection{makedefine} -\subsubsubsection{addaction} -\subsubsubsection{init} -\subsubsubsection{register} -\subsubsubsection{iif} -\subsubsubsection{dir} -\subsubsubsection{ldscript} - - -A sample file: - -\begin{verbatim} -target x - -# over-ride the default ROM size in the mainboard file -option CONFIG_ROM_SIZE=1024*1024 -mainboard amd/solo -end - -\end{verbatim} - -Sample mainboard file -\begin{verbatim} -# -### -### Set all of the defaults for an x86 architecture -### -arch i386 end -cpu k8 end -# -option CONFIG_DEBUG=1 -default CONFIG_USE_FALLBACK_IMAGE=1 -option A=(1+2) -option B=0xa -# -### -### Build our 16 bit and 32 bit linuxBIOS entry code -### -mainboardinit cpu/i386/entry16.inc -mainboardinit cpu/i386/entry32.inc -ldscript cpu/i386/entry16.lds -ldscript cpu/i386/entry32.lds -# -### -### Build our reset vector (This is where linuxBIOS is entered) -### -if CONFIG_USE_FALLBACK_IMAGE - mainboardinit cpu/i386/reset16.inc - ldscript cpu/i386/reset16.lds -else - mainboardinit cpu/i386/reset32.inc - ldscript cpu/i386/reset32.lds -end -. -. -. -if CONFIG_USE_FALLBACK_IMAGE mainboardinit arch/i386/lib/noop_failover.inc end -# -### -### Romcc output -### -#makerule ./failover.E dep "$(CONFIG_MAINBOARD)/failover.c" act "$(CPP) -I$(TOP)/src $(CPPFLAGS) $(CONFIG_MAINBOARD)/failover.c > ./failever.E" -#makerule ./failover.inc dep "./romcc ./failover.E" act "./romcc -O ./failover.E > failover.inc" -#mainboardinit ./failover.inc -makerule ./auto.E dep "$(CONFIG_MAINBOARD)/auto.c" act "$(CPP) -I$(TOP)/src -$(ROMCCPPFLAGS) $(CPPFLAGS) $(CONFIG_MAINBOARD)/auto.c > ./auto.E" -makerule ./auto.inc dep "./romcc ./auto.E" act "./romcc -O ./auto.E > auto.inc" -mainboardinit ./auto.inc -# -### -### Include the secondary Configuration files -### -northbridge amd/amdk8 -end -southbridge amd/amd8111 -end -#mainboardinit arch/i386/smp/secondary.inc -superio nsc/pc87360 - register "com1={1} com2={0} floppy=1 lpt=1 keyboard=1" -end -dir /pc80 -##dir /src/superio/winbond/w83627hf -cpu p5 end -cpu p6 end -cpu k7 end -cpu k8 end -# -### -### Build the objects we have code for in this directory. -### -##object mainboard.o -driver mainboard.o -object static_devices.o -if CONFIG_HAVE_MP_TABLE object mptable.o end -if CONFIG_HAVE_PIRQ_TABLE object irq_tables.o end -### Location of the DIMM EEPROMS on the SMBUS -### This is fixed into a narrow range by the DIMM package standard. -### -option SMBUS_MEM_DEVICE_START=(0xa << 3) -option SMBUS_MEM_DEVICE_END=(SMBUS_MEM_DEVICE_START +1) -option SMBUS_MEM_DEVICE_INC=1 -# -### The linuxBIOS bootloader. -### -option CONFIG_PAYLOAD_SIZE = (CONFIG_ROM_SECTION_SIZE - CONFIG_ROM_IMAGE_SIZE) -option CONFIG_ROM_PAYLOAD_START = (0xffffffff - CONFIG_ROM_SIZE + CONFIG_ROM_SECTION_OFFSET + 1) -# - -\end{verbatim} - -I've found the output of the new tool to be easier to -handle. Makefile.settings looks like this, for example: -\begin{verbatim} -TOP:=/home/rminnich/src/yapps2/freebios2 -TARGET_DIR:=x -export CONFIG_MAINBOARD:=/home/rminnich/src/yapps2/freebios2/src/mainboard/amd/solo -export CONFIG_ARCH:=i386 -export CONFIG_RAMBASE:=0x4000 -export CONFIG_ROM_IMAGE_SIZE:=65535 -export CONFIG_PAYLOAD_SIZE:=131073 -export CONFIG_MAX_CPUS:=1 -export CONFIG_HEAP_SIZE:=8192 -export CONFIG_STACK_SIZE:=8192 -export CONFIG_MEMORY_HOLE:=0 -export COREBOOT_VERSION:=1.1.0 -export CC:=$(CONFIG_CROSS_COMPILE)gcc - -\end{verbatim} - -In other words, instead of expressions, we see the values. It's easier to -deal with. |