€•’Œsphinx.addnodes”Œdocument”“”)”}”(Œ rawsource”Œ”Œchildren”]”(Œtranslations”Œ LanguagesNode”“”)”}”(hhh]”(hŒpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ refdomain”Œstd”Œreftype”Œdoc”Œ reftarget”Œ /translations/zh_CN/arch/arm/arm”Œmodname”NŒ classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ /translations/zh_TW/arch/arm/arm”Œmodname”NŒ classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ /translations/it_IT/arch/arm/arm”Œmodname”NŒ classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ /translations/ja_JP/arch/arm/arm”Œmodname”NŒ classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ /translations/ko_KR/arch/arm/arm”Œmodname”NŒ classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ /translations/sp_SP/arch/arm/arm”Œmodname”NŒ classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h hhŒ _document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒARM Linux 2.6 and upper”h]”hŒARM Linux 2.6 and upper”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒ:/var/lib/git/docbuild/linux/Documentation/arch/arm/arm.rst”h KubhŒblock_quote”“”)”}”(hŒDPlease check for updates. ”h]”hŒ paragraph”“”)”}”(hŒCPlease check for updates.”h]”(hŒPlease check <”…””}”(hh¿hžhhŸNh NubhŒ reference”“”)”}”(hŒ'ftp://ftp.arm.linux.org.uk/pub/armlinux”h]”hŒ'ftp://ftp.arm.linux.org.uk/pub/armlinux”…””}”(hhÉhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”hËuh1hÇhh¿ubhŒ> for updates.”…””}”(hh¿hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Khh¹ubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒCompilation of kernel”h]”hŒCompilation of kernel”…””}”(hhëhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hhèhžhhŸh¶h K ubh¸)”}”(hX¥In order to compile ARM Linux, you will need a compiler capable of generating ARM ELF code with GNU extensions. GCC 3.3 is known to be a good compiler. Fortunately, you needn't guess. The kernel will report an error if your compiler is a recognized offender. To build ARM Linux natively, you shouldn't have to alter the ARCH = line in the top level Makefile. However, if you don't have the ARM Linux ELF tools installed as default, then you should change the CROSS_COMPILE line as detailed below. If you wish to cross-compile, then alter the following lines in the top level make file:: ARCH = with:: ARCH = arm and:: CROSS_COMPILE= to:: CROSS_COMPILE= eg.:: CROSS_COMPILE=arm-linux- Do a 'make config', followed by 'make Image' to build the kernel (arch/arm/boot/Image). A compressed image can be built by doing a 'make zImage' instead of 'make Image'. ”h]”(h¾)”}”(hXIn order to compile ARM Linux, you will need a compiler capable of generating ARM ELF code with GNU extensions. GCC 3.3 is known to be a good compiler. Fortunately, you needn't guess. The kernel will report an error if your compiler is a recognized offender.”h]”hXIn order to compile ARM Linux, you will need a compiler capable of generating ARM ELF code with GNU extensions. GCC 3.3 is known to be a good compiler. Fortunately, you neednâ€™t guess. The kernel will report an error if your compiler is a recognized offender.”…””}”(hhýhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Khhùubh¾)”}”(hŒîTo build ARM Linux natively, you shouldn't have to alter the ARCH = line in the top level Makefile. However, if you don't have the ARM Linux ELF tools installed as default, then you should change the CROSS_COMPILE line as detailed below.”h]”hŒòTo build ARM Linux natively, you shouldnâ€™t have to alter the ARCH = line in the top level Makefile. However, if you donâ€™t have the ARM Linux ELF tools installed as default, then you should change the CROSS_COMPILE line as detailed below.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Khhùubh¾)”}”(hŒYIf you wish to cross-compile, then alter the following lines in the top level make file::”h]”hŒXIf you wish to cross-compile, then alter the following lines in the top level make file:”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KhhùubhŒ literal_block”“”)”}”(hŒARCH = ”h]”hŒARCH = ”…””}”hj)sbah}”(h]”h ]”h"]”h$]”h&]”Œ xml:space”Œpreserve”uh1j'hŸh¶h Khhùubh¾)”}”(hŒwith::”h]”hŒwith:”…””}”(hj9hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Khhùubj()”}”(hŒ ARCH = arm”h]”hŒ ARCH = arm”…””}”hjGsbah}”(h]”h ]”h"]”h$]”h&]”j7j8uh1j'hŸh¶h Khhùubh¾)”}”(hŒand::”h]”hŒand:”…””}”(hjUhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Khhùubj()”}”(hŒCROSS_COMPILE=”h]”hŒCROSS_COMPILE=”…””}”hjcsbah}”(h]”h ]”h"]”h$]”h&]”j7j8uh1j'hŸh¶h K hhùubh¾)”}”(hŒto::”h]”hŒto:”…””}”(hjqhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K"hhùubj()”}”(hŒ6CROSS_COMPILE=”h]”hŒ6CROSS_COMPILE=”…””}”hjsbah}”(h]”h ]”h"]”h$]”h&]”j7j8uh1j'hŸh¶h K$hhùubh¾)”}”(hŒeg.::”h]”hŒeg.:”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K&hhùubj()”}”(hŒCROSS_COMPILE=arm-linux-”h]”hŒCROSS_COMPILE=arm-linux-”…””}”hj›sbah}”(h]”h ]”h"]”h$]”h&]”j7j8uh1j'hŸh¶h K(hhùubh¾)”}”(hŒªDo a 'make config', followed by 'make Image' to build the kernel (arch/arm/boot/Image). A compressed image can be built by doing a 'make zImage' instead of 'make Image'.”h]”hŒºDo a â€˜make configâ€™, followed by â€˜make Imageâ€™ to build the kernel (arch/arm/boot/Image). A compressed image can be built by doing a â€˜make zImageâ€™ instead of â€˜make Imageâ€™.”…””}”(hj©hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K*hhùubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khhèhžhubeh}”(h]”Œcompilation-of-kernel”ah ]”h"]”Œcompilation of kernel”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K ubh¢)”}”(hhh]”(h§)”}”(hŒBug reports etc”h]”hŒBug reports etc”…””}”(hjÈhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjÅhžhhŸh¶h K0ubh¸)”}”(hXPlease send patches to the patch system. For more information, see http://www.arm.linux.org.uk/developer/patches/info.php Always include some explanation as to what the patch does and why it is needed. Bug reports should be sent to linux-arm-kernel@lists.arm.linux.org.uk, or submitted through the web form at http://www.arm.linux.org.uk/developer/ When sending bug reports, please ensure that they contain all relevant information, eg. the kernel messages that were printed before/during the problem, what you were doing, etc. ”h]”(h¾)”}”(hŒÊPlease send patches to the patch system. For more information, see http://www.arm.linux.org.uk/developer/patches/info.php Always include some explanation as to what the patch does and why it is needed.”h]”(hŒDPlease send patches to the patch system. For more information, see ”…””}”(hjÚhžhhŸNh NubhÈ)”}”(hŒ6http://www.arm.linux.org.uk/developer/patches/info.php”h]”hŒ6http://www.arm.linux.org.uk/developer/patches/info.php”…””}”(hjâhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”jäuh1hÇhjÚubhŒP Always include some explanation as to what the patch does and why it is needed.”…””}”(hjÚhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K2hjÖubh¾)”}”(hŒ’Bug reports should be sent to linux-arm-kernel@lists.arm.linux.org.uk, or submitted through the web form at http://www.arm.linux.org.uk/developer/”h]”(hŒBug reports should be sent to ”…””}”(hjûhžhhŸNh NubhÈ)”}”(hŒ'linux-arm-kernel@lists.arm.linux.org.uk”h]”hŒ'linux-arm-kernel@lists.arm.linux.org.uk”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œ.mailto:linux-arm-kernel@lists.arm.linux.org.uk”uh1hÇhjûubhŒ', or submitted through the web form at ”…””}”(hjûhžhhŸNh NubhÈ)”}”(hŒ&http://www.arm.linux.org.uk/developer/”h]”hŒ&http://www.arm.linux.org.uk/developer/”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”juh1hÇhjûubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K6hjÖubh¾)”}”(hŒ²When sending bug reports, please ensure that they contain all relevant information, eg. the kernel messages that were printed before/during the problem, what you were doing, etc.”h]”hŒ²When sending bug reports, please ensure that they contain all relevant information, eg. the kernel messages that were printed before/during the problem, what you were doing, etc.”…””}”(hj,hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K:hjÖubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K2hjÅhžhubeh}”(h]”Œbug-reports-etc”ah ]”h"]”Œbug reports etc”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K0ubh¢)”}”(hhh]”(h§)”}”(hŒ Include files”h]”hŒ Include files”…””}”(hjKhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjHhžhhŸh¶h K@ubh¸)”}”(hXxSeveral new include directories have been created under include/asm-arm, which are there to reduce the clutter in the top-level directory. These directories, and their purpose is listed below: ============= ========================================================== `arch-*` machine/platform specific header files `hardware` driver-internal ARM specific data structures/definitions `mach` descriptions of generic ARM to specific machine interfaces `proc-*` processor dependent header files (currently only two categories) ============= ========================================================== ”h]”(h¾)”}”(hŒÁSeveral new include directories have been created under include/asm-arm, which are there to reduce the clutter in the top-level directory. These directories, and their purpose is listed below:”h]”hŒÁSeveral new include directories have been created under include/asm-arm, which are there to reduce the clutter in the top-level directory. These directories, and their purpose is listed below:”…””}”(hj]hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KBhjYubhŒtable”“”)”}”(hhh]”hŒtgroup”“”)”}”(hhh]”(hŒcolspec”“”)”}”(hhh]”h}”(h]”h ]”h"]”h$]”h&]”Œcolwidth”K uh1juhjrubjv)”}”(hhh]”h}”(h]”h ]”h"]”h$]”h&]”Œcolwidth”K:uh1juhjrubhŒtbody”“”)”}”(hhh]”(hŒrow”“”)”}”(hhh]”(hŒentry”“”)”}”(hhh]”h¾)”}”(hŒ`arch-*`”h]”hŒtitle_reference”“”)”}”(hjœh]”hŒarch-*”…””}”(hj hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhjšubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KGhj—ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hj’ubj–)”}”(hhh]”h¾)”}”(hŒ&machine/platform specific header files”h]”hŒ&machine/platform specific header files”…””}”(hj¼hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KGhj¹ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hj’ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jhjubj‘)”}”(hhh]”(j–)”}”(hhh]”h¾)”}”(hŒ `hardware`”h]”jŸ)”}”(hjÞh]”hŒhardware”…””}”(hjàhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhjÜubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KHhjÙubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hjÖubj–)”}”(hhh]”h¾)”}”(hŒ8driver-internal ARM specific data structures/definitions”h]”hŒ8driver-internal ARM specific data structures/definitions”…””}”(hjühžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KHhjùubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hjÖubeh}”(h]”h ]”h"]”h$]”h&]”uh1jhjubj‘)”}”(hhh]”(j–)”}”(hhh]”h¾)”}”(hŒ`mach`”h]”jŸ)”}”(hjh]”hŒmach”…””}”(hj hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhjubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KIhjubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hjubj–)”}”(hhh]”h¾)”}”(hŒ:descriptions of generic ARM to specific machine interfaces”h]”hŒ:descriptions of generic ARM to specific machine interfaces”…””}”(hj<hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KIhj9ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hjubeh}”(h]”h ]”h"]”h$]”h&]”uh1jhjubj‘)”}”(hhh]”(j–)”}”(hhh]”h¾)”}”(hŒ`proc-*`”h]”jŸ)”}”(hj^h]”hŒproc-*”…””}”(hj`hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhj\ubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KJhjYubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hjVubj–)”}”(hhh]”h¾)”}”(hŒ@processor dependent header files (currently only two categories)”h]”hŒ@processor dependent header files (currently only two categories)”…””}”(hj|hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KJhjyubah}”(h]”h ]”h"]”h$]”h&]”uh1j•hjVubeh}”(h]”h ]”h"]”h$]”h&]”uh1jhjubeh}”(h]”h ]”h"]”h$]”h&]”uh1j‹hjrubeh}”(h]”h ]”h"]”h$]”h&]”Œcols”Kuh1jphjmubah}”(h]”h ]”h"]”h$]”h&]”uh1jkhjYubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KBhjHhžhubeh}”(h]”Œ include-files”ah ]”h"]”Œ include files”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K@ubh¢)”}”(hhh]”(h§)”}”(hŒMachine/Platform support”h]”hŒMachine/Platform support”…””}”(hjºhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj·hžhhŸh¶h KPubh¸)”}”(hXsThe ARM tree contains support for a lot of different machine types. To continue supporting these differences, it has become necessary to split machine-specific parts by directory. For this, the machine category is used to select which directories and files get included (we will use $(MACHINE) to refer to the category) To this end, we now have arch/arm/mach-$(MACHINE) directories which are designed to house the non-driver files for a particular machine (eg, PCI, memory management, architecture definitions etc). For all future machines, there should be a corresponding arch/arm/mach-$(MACHINE)/include/mach directory. ”h]”(h¾)”}”(hXAThe ARM tree contains support for a lot of different machine types. To continue supporting these differences, it has become necessary to split machine-specific parts by directory. For this, the machine category is used to select which directories and files get included (we will use $(MACHINE) to refer to the category)”h]”hXAThe ARM tree contains support for a lot of different machine types. To continue supporting these differences, it has become necessary to split machine-specific parts by directory. For this, the machine category is used to select which directories and files get included (we will use $(MACHINE) to refer to the category)”…””}”(hjÌhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KRhjÈubh¾)”}”(hX.To this end, we now have arch/arm/mach-$(MACHINE) directories which are designed to house the non-driver files for a particular machine (eg, PCI, memory management, architecture definitions etc). For all future machines, there should be a corresponding arch/arm/mach-$(MACHINE)/include/mach directory.”h]”hX.To this end, we now have arch/arm/mach-$(MACHINE) directories which are designed to house the non-driver files for a particular machine (eg, PCI, memory management, architecture definitions etc). For all future machines, there should be a corresponding arch/arm/mach-$(MACHINE)/include/mach directory.”…””}”(hjÚhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KXhjÈubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KRhj·hžhubeh}”(h]”Œmachine-platform-support”ah ]”h"]”Œmachine/platform support”ah$]”h&]”uh1h¡hh£hžhhŸh¶h KPubh¢)”}”(hhh]”(h§)”}”(hŒModules”h]”hŒModules”…””}”(hjùhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjöhžhhŸh¶h K`ubh¸)”}”(hXÃAlthough modularisation is supported (and required for the FP emulator), each module on an ARM2/ARM250/ARM3 machine when is loaded will take memory up to the next 32k boundary due to the size of the pages. Therefore, is modularisation on these machines really worth it? However, ARM6 and up machines allow modules to take multiples of 4k, and as such Acorn RiscPCs and other architectures using these processors can make good use of modularisation. ”h]”(h¾)”}”(hX Although modularisation is supported (and required for the FP emulator), each module on an ARM2/ARM250/ARM3 machine when is loaded will take memory up to the next 32k boundary due to the size of the pages. Therefore, is modularisation on these machines really worth it?”h]”hX Although modularisation is supported (and required for the FP emulator), each module on an ARM2/ARM250/ARM3 machine when is loaded will take memory up to the next 32k boundary due to the size of the pages. Therefore, is modularisation on these machines really worth it?”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Kbhjubh¾)”}”(hŒ²However, ARM6 and up machines allow modules to take multiples of 4k, and as such Acorn RiscPCs and other architectures using these processors can make good use of modularisation.”h]”hŒ²However, ARM6 and up machines allow modules to take multiples of 4k, and as such Acorn RiscPCs and other architectures using these processors can make good use of modularisation.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Kghjubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kbhjöhžhubeh}”(h]”Œmodules”ah ]”h"]”Œmodules”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K`ubh¢)”}”(hhh]”(h§)”}”(hŒADFS Image files”h]”hŒADFS Image files”…””}”(hj8hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj5hžhhŸh¶h Kmubh¸)”}”(hX1You can access image files on your ADFS partitions by mounting the ADFS partition, and then using the loopback device driver. You must have losetup installed. Please note that the PCEmulator DOS partitions have a partition table at the start, and as such, you will have to give '-o offset' to losetup. ”h]”(h¾)”}”(hŒŸYou can access image files on your ADFS partitions by mounting the ADFS partition, and then using the loopback device driver. You must have losetup installed.”h]”hŒŸYou can access image files on your ADFS partitions by mounting the ADFS partition, and then using the loopback device driver. You must have losetup installed.”…””}”(hjJhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KohjFubh¾)”}”(hŒŽPlease note that the PCEmulator DOS partitions have a partition table at the start, and as such, you will have to give '-o offset' to losetup.”h]”hŒ’Please note that the PCEmulator DOS partitions have a partition table at the start, and as such, you will have to give â€˜-o offsetâ€™ to losetup.”…””}”(hjXhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KshjFubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kohj5hžhubeh}”(h]”Œadfs-image-files”ah ]”h"]”Œadfs image files”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kmubh¢)”}”(hhh]”(h§)”}”(hŒRequest to developers”h]”hŒRequest to developers”…””}”(hjwhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjthžhhŸh¶h Kxubh¸)”}”(hX–When writing device drivers which include a separate assembler file, please include it in with the C file, and not the arch/arm/lib directory. This allows the driver to be compiled as a loadable module without requiring half the code to be compiled into the kernel image. In general, try to avoid using assembler unless it is really necessary. It makes drivers far less easy to port to other hardware. ”h]”(h¾)”}”(hXWhen writing device drivers which include a separate assembler file, please include it in with the C file, and not the arch/arm/lib directory. This allows the driver to be compiled as a loadable module without requiring half the code to be compiled into the kernel image.”h]”hXWhen writing device drivers which include a separate assembler file, please include it in with the C file, and not the arch/arm/lib directory. This allows the driver to be compiled as a loadable module without requiring half the code to be compiled into the kernel image.”…””}”(hj‰hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Kzhj…ubh¾)”}”(hŒ‚In general, try to avoid using assembler unless it is really necessary. It makes drivers far less easy to port to other hardware.”h]”hŒ‚In general, try to avoid using assembler unless it is really necessary. It makes drivers far less easy to port to other hardware.”…””}”(hj—hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Khj…ubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kzhjthžhubeh}”(h]”Œrequest-to-developers”ah ]”h"]”Œrequest to developers”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kxubh¢)”}”(hhh]”(h§)”}”(hŒST506 hard drives”h]”hŒST506 hard drives”…””}”(hj¶hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj³hžhhŸh¶h K„ubh¸)”}”(hX2The ST506 hard drive controllers seem to be working fine (if a little slowly). At the moment they will only work off the controllers on an A4x0's motherboard, but for it to work off a Podule just requires someone with a podule to add the addresses for the IRQ mask and the HDC base to the source. As of 31/3/96 it works with two drives (you should get the ADFS `*configure` harddrive set to 2). I've got an internal 20MB and a great big external 5.25" FH 64MB drive (who could ever want more :-) ). I've just got 240K/s off it (a dd with bs=128k); that's about half of what RiscOS gets; but it's a heck of a lot better than the 50K/s I was getting last week :-) Known bug: Drive data errors can cause a hang; including cases where the controller has fixed the error using ECC. (Possibly ONLY in that case...hmm). ”h]”(h¾)”}”(hX)The ST506 hard drive controllers seem to be working fine (if a little slowly). At the moment they will only work off the controllers on an A4x0's motherboard, but for it to work off a Podule just requires someone with a podule to add the addresses for the IRQ mask and the HDC base to the source.”h]”hX+The ST506 hard drive controllers seem to be working fine (if a little slowly). At the moment they will only work off the controllers on an A4x0â€™s motherboard, but for it to work off a Podule just requires someone with a podule to add the addresses for the IRQ mask and the HDC base to the source.”…””}”(hjÈhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K†hjÄubh¾)”}”(hŒÉAs of 31/3/96 it works with two drives (you should get the ADFS `*configure` harddrive set to 2). I've got an internal 20MB and a great big external 5.25" FH 64MB drive (who could ever want more :-) ).”h]”(hŒ@As of 31/3/96 it works with two drives (you should get the ADFS ”…””}”(hjÖhžhhŸNh NubjŸ)”}”(hŒ`*configure`”h]”hŒ *configure”…””}”(hjÞhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhjÖubhŒ harddrive set to 2). Iâ€™ve got an internal 20MB and a great big external 5.25â€ FH 64MB drive (who could ever want more :-) ).”…””}”(hjÖhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KŒhjÄubh¾)”}”(hŒ¢I've just got 240K/s off it (a dd with bs=128k); that's about half of what RiscOS gets; but it's a heck of a lot better than the 50K/s I was getting last week :-)”h]”hŒ¨Iâ€™ve just got 240K/s off it (a dd with bs=128k); thatâ€™s about half of what RiscOS gets; but itâ€™s a heck of a lot better than the 50K/s I was getting last week :-)”…””}”(hjöhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KhjÄubh¾)”}”(hŒ–Known bug: Drive data errors can cause a hang; including cases where the controller has fixed the error using ECC. (Possibly ONLY in that case...hmm).”h]”hŒ–Known bug: Drive data errors can cause a hang; including cases where the controller has fixed the error using ECC. (Possibly ONLY in that case...hmm).”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K”hjÄubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K†hj³hžhubeh}”(h]”Œst506-hard-drives”ah ]”h"]”Œst506 hard drives”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K„ubh¢)”}”(hhh]”(h§)”}”(hŒ1772 Floppy”h]”hŒ1772 Floppy”…””}”(hj#hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj hžhhŸh¶h Kšubh¸)”}”(hŒçThis also seems to work OK, but hasn't been stressed much lately. It hasn't got any code for disc change detection in there at the moment which could be a bit of a problem! Suggestions on the correct way to do this are welcome. ”h]”h¾)”}”(hŒåThis also seems to work OK, but hasn't been stressed much lately. It hasn't got any code for disc change detection in there at the moment which could be a bit of a problem! Suggestions on the correct way to do this are welcome.”h]”hŒéThis also seems to work OK, but hasnâ€™t been stressed much lately. It hasnâ€™t got any code for disc change detection in there at the moment which could be a bit of a problem! Suggestions on the correct way to do this are welcome.”…””}”(hj5hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K›hj1ubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K›hj hžhubeh}”(h]”Œfloppy”ah ]”h"]”Œ1772 floppy”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kšubh¢)”}”(hhh]”(h§)”}”(hŒ!`CONFIG_MACH_` and `CONFIG_ARCH_`”h]”(jŸ)”}”(hŒ`CONFIG_MACH_`”h]”hŒCONFIG_MACH_”…””}”(hjXhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhjTubhŒ and ”…””}”(hjThžhhŸNh NubjŸ)”}”(hŒ`CONFIG_ARCH_`”h]”hŒCONFIG_ARCH_”…””}”(hjjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhjTubeh}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjQhžhhŸh¶h K¢ubh¸)”}”(hXàA change was made in 2003 to the macro names for new machines. Historically, `CONFIG_ARCH_` was used for the bonafide architecture, e.g. SA1100, as well as implementations of the architecture, e.g. Assabet. It was decided to change the implementation macros to read `CONFIG_MACH_` for clarity. Moreover, a retroactive fixup has not been made because it would complicate patching. Previous registrations may be found online. ”h]”(h¾)”}”(hX}A change was made in 2003 to the macro names for new machines. Historically, `CONFIG_ARCH_` was used for the bonafide architecture, e.g. SA1100, as well as implementations of the architecture, e.g. Assabet. It was decided to change the implementation macros to read `CONFIG_MACH_` for clarity. Moreover, a retroactive fixup has not been made because it would complicate patching.”h]”(hŒMA change was made in 2003 to the macro names for new machines. Historically, ”…””}”(hj‚hžhhŸNh NubjŸ)”}”(hŒ`CONFIG_ARCH_`”h]”hŒCONFIG_ARCH_”…””}”(hjŠhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhj‚ubhŒ° was used for the bonafide architecture, e.g. SA1100, as well as implementations of the architecture, e.g. Assabet. It was decided to change the implementation macros to read ”…””}”(hj‚hžhhŸNh NubjŸ)”}”(hŒ`CONFIG_MACH_`”h]”hŒCONFIG_MACH_”…””}”(hjœhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jžhj‚ubhŒd for clarity. Moreover, a retroactive fixup has not been made because it would complicate patching.”…””}”(hj‚hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K£hj~ubh¾)”}”(hŒ+Previous registrations may be found online.”h]”hŒ+Previous registrations may be found online.”…””}”(hj´hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h Kªhj~ubh¸)”}”(hŒ2 ”h]”h¾)”}”(hŒ1”h]”(hŒ<”…””}”(hjÆhžhhŸNh NubhÈ)”}”(hŒ/http://www.arm.linux.org.uk/developer/machines/”h]”hŒ/http://www.arm.linux.org.uk/developer/machines/”…””}”(hjÎhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”jÐuh1hÇhjÆubhŒ>”…””}”(hjÆhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K¬hjÂubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K¬hj~ubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K£hjQhžhubeh}”(h]”Œconfig-mach-and-config-arch”ah ]”h"]”Œconfig_mach_ and config_arch_”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K¢ubh¢)”}”(hhh]”(h§)”}”(hŒKernel entry (head.S)”h]”hŒKernel entry (head.S)”…””}”(hjþhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjûhžhhŸh¶h K¯ubh¸)”}”(hXyThe initial entry into the kernel is via head.S, which uses machine independent code. The machine is selected by the value of 'r1' on entry, which must be kept unique. Due to the large number of machines which the ARM port of Linux provides for, we have a method to manage this which ensures that we don't end up duplicating large amounts of code. We group machine (or platform) support code into machine classes. A class typically based around one or more system on a chip devices, and acts as a natural container around the actual implementations. These classes are given directories - arch/arm/mach- - which contain the source files and include/mach/ to support the machine class. For example, the SA1100 class is based upon the SA1100 and SA1110 SoC devices, and contains the code to support the way the on-board and off- board devices are used, or the device is setup, and provides that machine specific "personality." For platforms that support device tree (DT), the machine selection is controlled at runtime by passing the device tree blob to the kernel. At compile-time, support for the machine type must be selected. This allows for a single multiplatform kernel build to be used for several machine types. For platforms that do not use device tree, this machine selection is controlled by the machine type ID, which acts both as a run-time and a compile-time code selection method. You can register a new machine via the web site at: Note: Please do not register a machine type for DT-only platforms. If your platform is DT-only, you do not need a registered machine type. ”h]”(h¾)”}”(hŒ¨The initial entry into the kernel is via head.S, which uses machine independent code. The machine is selected by the value of 'r1' on entry, which must be kept unique.”h]”hŒ¬The initial entry into the kernel is via head.S, which uses machine independent code. The machine is selected by the value of â€˜r1â€™ on entry, which must be kept unique.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K°hjubh¾)”}”(hŒ³Due to the large number of machines which the ARM port of Linux provides for, we have a method to manage this which ensures that we don't end up duplicating large amounts of code.”h]”hŒµDue to the large number of machines which the ARM port of Linux provides for, we have a method to manage this which ensures that we donâ€™t end up duplicating large amounts of code.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K´hjubh¾)”}”(hXXWe group machine (or platform) support code into machine classes. A class typically based around one or more system on a chip devices, and acts as a natural container around the actual implementations. These classes are given directories - arch/arm/mach- - which contain the source files and include/mach/ to support the machine class.”h]”hXXWe group machine (or platform) support code into machine classes. A class typically based around one or more system on a chip devices, and acts as a natural container around the actual implementations. These classes are given directories - arch/arm/mach- - which contain the source files and include/mach/ to support the machine class.”…””}”(hj,hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K¸hjubh¾)”}”(hŒïFor example, the SA1100 class is based upon the SA1100 and SA1110 SoC devices, and contains the code to support the way the on-board and off- board devices are used, or the device is setup, and provides that machine specific "personality."”h]”hŒóFor example, the SA1100 class is based upon the SA1100 and SA1110 SoC devices, and contains the code to support the way the on-board and off- board devices are used, or the device is setup, and provides that machine specific â€œpersonality.â€”…””}”(hj:hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h K¾hjubh¾)”}”(hX&For platforms that support device tree (DT), the machine selection is controlled at runtime by passing the device tree blob to the kernel. At compile-time, support for the machine type must be selected. This allows for a single multiplatform kernel build to be used for several machine types.”h]”hX&For platforms that support device tree (DT), the machine selection is controlled at runtime by passing the device tree blob to the kernel. At compile-time, support for the machine type must be selected. This allows for a single multiplatform kernel build to be used for several machine types.”…””}”(hjHhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KÃhjubh¾)”}”(hŒäFor platforms that do not use device tree, this machine selection is controlled by the machine type ID, which acts both as a run-time and a compile-time code selection method. You can register a new machine via the web site at:”h]”hŒäFor platforms that do not use device tree, this machine selection is controlled by the machine type ID, which acts both as a run-time and a compile-time code selection method. You can register a new machine via the web site at:”…””}”(hjVhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KÈhjubh¸)”}”(hŒ2 ”h]”h¾)”}”(hŒ1”h]”(hŒ<”…””}”(hjhhžhhŸNh NubhÈ)”}”(hŒ/http://www.arm.linux.org.uk/developer/machines/”h]”hŒ/http://www.arm.linux.org.uk/developer/machines/”…””}”(hjphžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”jruh1hÇhjhubhŒ>”…””}”(hjhhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KÍhjdubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KÍhjubh¾)”}”(hŒ‹Note: Please do not register a machine type for DT-only platforms. If your platform is DT-only, you do not need a registered machine type.”h]”hŒ‹Note: Please do not register a machine type for DT-only platforms. If your platform is DT-only, you do not need a registered machine type.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KÏhjubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K°hjûhžhubh¾)”}”(hŒ---”h]”hŒ---”…””}”(hj£hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KÒhjûhžhubh¾)”}”(hŒRussell King (15/03/2004)”h]”hŒRussell King (15/03/2004)”…””}”(hj±hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h½hŸh¶h KÔhjûhžhubeh}”(h]”Œkernel-entry-head-s”ah ]”h"]”Œkernel entry (head.s)”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K¯ubeh}”(h]”Œarm-linux-2-6-and-upper”ah ]”h"]”Œarm linux 2.6 and upper”ah$]”h&]”uh1h¡hhhžhhŸh¶h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h¶uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¦NŒ generator”NŒ datestamp”NŒsource_link”NŒ source_url”NŒ toc_backlinks”j•Œfootnote_backlinks”KŒ sectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒ strip_classes”NŒreport_level”KŒ halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ traceback”ˆŒinput_encoding”Œ utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”jñŒerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œ language_code”Œen”Œrecord_dependencies”NŒconfig”NŒ id_prefix”hŒauto_id_prefix”Œid”Œ dump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h¶Œ_destination”NŒ _config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œ docinfo_xform”KŒsectsubtitle_xform”‰Œ image_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(jÌjÉjÂj¿jEjBj´j±jójðj2j/jqjnj°jjjjNjKjøjõjÄjÁuŒ nametypes”}”(jÌ‰jÂ‰jE‰j´‰jó‰j2‰jq‰j°‰j‰jN‰jø‰jÄ‰uh}”(jÉh£j¿hèjBjÅj±jHjðj·j/jöjnj5jjtjj³jKj jõjQjÁjûuŒ footnote_refs”}”Œ citation_refs”}”Œ autofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ footnotes”]”Œ citations”]”Œautofootnote_start”KŒsymbol_footnote_start”KŒ id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ decoration”Nhžhub.