Instructions for building and booting Linux - Revision history

Jcmvbkbc: building kernel on its own

2019-08-30T01:21:05Z

building kernel on its own

← Older revision		Revision as of 01:21, 30 August 2019
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	$ '''make -C buildroot O=$(pwd)/buildroot-build'''		$ '''make -C buildroot O=$(pwd)/buildroot-build'''

	== ~~Get, configure and build the Linux~~ kernel ==		== The kernel may be built on its own ==
	Get stable Linux release tree:		Get stable Linux release tree:
	$ '''wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.19.1.tar.xz'''		$ '''wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.19.1.tar.xz'''

Jcmvbkbc: building kernel inside the buildroot

2019-08-30T01:19:13Z

building kernel inside the buildroot

← Older revision		Revision as of 01:19, 30 August 2019
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	Please see [[Buildroot#Configuring_and_building_Buildroot\|this]] chapter for more details about configuring the Buildroot.		Please see [[Buildroot#Configuring_and_building_Buildroot\|this]] chapter for more details about configuring the Buildroot.

	Select 'Target Architecture' = Xtensa, 'Target Architecture Variant' = Custom Xtensa processor configuration, set '~~Custom Xtensa processor~~ configuration ~~name~~' to the ~~contents~~ of ~~${XT_CORE}, set 'Overlay directory for custom configuration' = $~~(~~TOPDIR~~)/..		Select 'Target Architecture' = Xtensa, 'Target Architecture Variant' = Custom Xtensa processor configuration, set 'Overlay file for custom configuration ' to the location of the overlay archive (it may be a path to a local file or an URL).

	Select toolchain options, packages to be built and final root file system image type.		Select toolchain options, packages to be built and final root file system image type. Select whether the kernel need to be built, kernel version and configuration.

	Build the toolchain and the root file system:		Build the toolchain, kernel and the root file system:
	$ '''make -C buildroot O=$(pwd)/buildroot-build'''		$ '''make -C buildroot O=$(pwd)/buildroot-build'''

Jcmvbkbc: drop special uclinux case

2018-04-24T20:33:45Z

drop special uclinux case

← Older revision		Revision as of 20:33, 24 April 2018
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	Official requirements for Xtensa core to run Linux are listed in the Xtensa OSKit Guide document.		Official requirements for Xtensa core to run Linux are listed in the Xtensa OSKit Guide document.
	The absolute minimum set of options required to run Linux is ~~full MMU, debug option,~~ windowed registers, one level-1 or medium level timer interrupt.		The absolute minimum set of options required to run Linux is windowed registers, exception option and one level-1 or medium level timer interrupt.
	* ~~See [[uClinux]]~~ for ~~experimental support of Xtensa cores without~~ full ~~MMU~~.		* Full MMU option is required for full featured Linux kernel that includes process address space isolation, virtual memory and fork syscall.
	* ~~Thread~~ pointer option and conditional store option are required for running userspace with NPTL or TLS.		* Full MMU option, thread pointer option and conditional store option are required for running userspace with NPTL or TLS.

	== Xtensa boards supported by Linux ==		== Xtensa boards supported by Linux ==

Jcmvbkbc: fix U-Boot page link

2018-03-02T23:09:01Z

fix U-Boot page link

← Older revision		Revision as of 23:09, 2 March 2018
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	== Bootloader ==		== Bootloader ==
	U-Boot can be used as a bootloader on XTFPGA boards. Please see [[~~Setting_up_U~~-Boot\|this]] page for more details about installing it into the daughterboard FLASH.		U-Boot can be used as a bootloader on XTFPGA boards. Please see [[U-Boot\|this]] page for more details about installing it into the daughterboard FLASH.

	== On-chip debugger ==		== On-chip debugger ==

Jcmvbkbc: add 'cores supported by linux'

2015-10-06T03:17:50Z

add 'cores supported by linux'

← Older revision		Revision as of 03:17, 6 October 2015
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	To build Linux image and root file system a toolchain correctly configured for used Xtensa core is needed. Toolchain configuration is performed by application of [[Toolchain_Overlay_File\|Xtensa configuration overlay]]. Correct toolchain configuration is critical for building other pieces of software correctly.		To build Linux image and root file system a toolchain correctly configured for used Xtensa core is needed. Toolchain configuration is performed by application of [[Toolchain_Overlay_File\|Xtensa configuration overlay]]. Correct toolchain configuration is critical for building other pieces of software correctly.

			== Xtensa cores supported by Linux ==

			Official requirements for Xtensa core to run Linux are listed in the Xtensa OSKit Guide document.
			The absolute minimum set of options required to run Linux is full MMU, debug option, windowed registers, one level-1 or medium level timer interrupt.
			* See [[uClinux]] for experimental support of Xtensa cores without full MMU.
			* Thread pointer option and conditional store option are required for running userspace with NPTL or TLS.

	== Xtensa boards supported by Linux ==		== Xtensa boards supported by Linux ==

Jcmvbkbc at 18:58, 12 March 2015

2015-03-12T18:58:23Z

← Older revision		Revision as of 18:58, 12 March 2015
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	Build the kernel:		Build the kernel:
	$ '''ARCH=xtensa CROSS_COMPILE=$(pwd)/buildroot-build/host/usr/bin/xtensa-buildroot-linux-uclibc- make -C linux-3.19.1 O=$(pwd)/linux-build all'''		$ '''ARCH=xtensa CROSS_COMPILE=$(pwd)/buildroot-build/host/usr/bin/xtensa-buildroot-linux-uclibc- make -C linux-3.19.1 O=$(pwd)/linux-build all'''

			= Booting GNU/Linux =
			TBD

Jcmvbkbc: fix typos

2015-03-12T18:57:23Z

fix typos

← Older revision		Revision as of 18:57, 12 March 2015
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	* Xtensa software provides Instruction Set Simulator (xt-run) capable of running Linux configured for ISS.		* Xtensa software provides Instruction Set Simulator (xt-run) capable of running Linux configured for ISS.
	* QEMU is a free system emulator capable of emulating any XTFPGA board. It can be configured to emulate any Xtensa core, but it does not currently support TIE extensions to the core architecture. Please see [[Xtensa_on_QEMU\|this]] page for more details.		* QEMU is a free system emulator capable of emulating any XTFPGA board or ISS. It can be configured to emulate any Xtensa core, but it does not currently support TIE extensions to the core architecture. Please see [[Xtensa_on_QEMU\|this]] page for more details.

	== Linux kernel ==		== Linux kernel ==
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	=== CPIO archive ===		=== CPIO archive ===
	* CPIO archive may be built into the kernel (so called 'built-in initramfs'), the resulting ~~signle~~ image will contain both Linux and GNU software. It's easy to boot, but in order to change anything the kernel needs to be rebuilt.		* CPIO archive may be built into the kernel (so called 'built-in initramfs'), the resulting single image will contain both Linux and GNU software. It's easy to boot, but in order to change anything the kernel needs to be rebuilt.
	* CPIO archive may also be loaded separately from the kernel, but used in the same way as the built-in initramfs. It's harder to boot (two files instead of one), but easier to change.		* CPIO archive may also be loaded separately from the kernel, but used in the same way as the built-in initramfs. It's harder to boot (two files instead of one), but easier to change.

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	Build the toolchain and the root file system:		Build the toolchain and the root file system:
	$ '''make -C buildroot O=`pwd`/buildroot-build'''		$ '''make -C buildroot O=$(pwd)/buildroot-build'''

	== Get, configure and build the Linux kernel ==		== Get, configure and build the Linux kernel ==

Jcmvbkbc: Rewrite the page, overview and building parts.

2015-03-12T18:52:26Z

Rewrite the page, overview and building parts.

Show changes

Chris at 18:19, 29 July 2014

2014-07-29T18:19:13Z

← Older revision		Revision as of 18:19, 29 July 2014
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	''Note that ~~development~~ for ~~buildroot has moved to~~ the ~~mainline~~ Buildroot repository ~~at http://buildroot.net. Instructions~~ for building ~~a version of~~ Buildroot ~~based on the latest version~~ can be found under [[Buildroot]]''		<big>''Note that this page is mostly outdated and only kept for reference. Support for Xtensa is now integrated in the main Buildroot repository and instructions for building Buildroot can be found under [[Buildroot]]''</big>

Chris: Buildroot Build Instructions moved to Instructions for building and booting Linux

2013-03-15T18:08:18Z

Buildroot Build Instructions moved to Instructions for building and booting Linux

← Older revision	Revision as of 18:08, 15 March 2013
(No difference)