f548f20176
The official punctuation for Arm CPU names uses a hyphen, like "Cortex-A9". We mostly follow this, but in a few places usage without the hyphen has crept in. Fix those so we consistently use the same way of writing the CPU name. This commit was created with: git grep -z -l 'Cortex ' | xargs -0 sed -i 's/Cortex /Cortex-/' Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20210527095152.10968-1-peter.maydell@linaro.org
120 lines
3.5 KiB
ReStructuredText
120 lines
3.5 KiB
ReStructuredText
Boundary Devices SABRE Lite (``sabrelite``)
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===========================================
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Boundary Devices SABRE Lite i.MX6 Development Board is a low-cost development
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platform featuring the powerful Freescale / NXP Semiconductor's i.MX 6 Quad
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Applications Processor.
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Supported devices
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-----------------
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The SABRE Lite machine supports the following devices:
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* Up to 4 Cortex-A9 cores
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* Generic Interrupt Controller
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* 1 Clock Controller Module
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* 1 System Reset Controller
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* 5 UARTs
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* 2 EPIC timers
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* 1 GPT timer
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* 2 Watchdog timers
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* 1 FEC Ethernet controller
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* 3 I2C controllers
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* 7 GPIO controllers
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* 4 SDHC storage controllers
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* 4 USB 2.0 host controllers
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* 5 ECSPI controllers
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* 1 SST 25VF016B flash
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Please note above list is a complete superset the QEMU SABRE Lite machine can
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support. For a normal use case, a device tree blob that represents a real world
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SABRE Lite board, only exposes a subset of devices to the guest software.
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Boot options
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------------
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The SABRE Lite machine can start using the standard -kernel functionality
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for loading a Linux kernel, U-Boot bootloader or ELF executable.
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Running Linux kernel
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--------------------
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Linux mainline v5.10 release is tested at the time of writing. To build a Linux
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mainline kernel that can be booted by the SABRE Lite machine, simply configure
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the kernel using the imx_v6_v7_defconfig configuration:
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.. code-block:: bash
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$ export ARCH=arm
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$ export CROSS_COMPILE=arm-linux-gnueabihf-
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$ make imx_v6_v7_defconfig
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$ make
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To boot the newly built Linux kernel in QEMU with the SABRE Lite machine, use:
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.. code-block:: bash
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$ qemu-system-arm -M sabrelite -smp 4 -m 1G \
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-display none -serial null -serial stdio \
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-kernel arch/arm/boot/zImage \
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-dtb arch/arm/boot/dts/imx6q-sabrelite.dtb \
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-initrd /path/to/rootfs.ext4 \
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-append "root=/dev/ram"
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Running U-Boot
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--------------
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U-Boot mainline v2020.10 release is tested at the time of writing. To build a
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U-Boot mainline bootloader that can be booted by the SABRE Lite machine, use
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the mx6qsabrelite_defconfig with similar commands as described above for Linux:
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.. code-block:: bash
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$ export CROSS_COMPILE=arm-linux-gnueabihf-
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$ make mx6qsabrelite_defconfig
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Note we need to adjust settings by:
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.. code-block:: bash
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$ make menuconfig
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then manually select the following configuration in U-Boot:
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Device Tree Control > Provider of DTB for DT Control > Embedded DTB
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To start U-Boot using the SABRE Lite machine, provide the u-boot binary to
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the -kernel argument, along with an SD card image with rootfs:
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.. code-block:: bash
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$ qemu-system-arm -M sabrelite -smp 4 -m 1G \
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-display none -serial null -serial stdio \
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-kernel u-boot
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The following example shows booting Linux kernel from dhcp, and uses the
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rootfs on an SD card. This requires some additional command line parameters
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for QEMU:
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.. code-block:: none
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-nic user,tftp=/path/to/kernel/zImage \
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-drive file=sdcard.img,id=rootfs -device sd-card,drive=rootfs
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The directory for the built-in TFTP server should also contain the device tree
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blob of the SABRE Lite board. The sample SD card image was populated with the
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root file system with one single partition. You may adjust the kernel "root="
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boot parameter accordingly.
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After U-Boot boots, type the following commands in the U-Boot command shell to
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boot the Linux kernel:
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.. code-block:: none
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=> setenv ethaddr 00:11:22:33:44:55
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=> setenv bootfile zImage
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=> dhcp
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=> tftpboot 14000000 imx6q-sabrelite.dtb
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=> setenv bootargs root=/dev/mmcblk3p1
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=> bootz 12000000 - 14000000
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