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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 23/23] docs/system: arm: Add sabrelite board description
Date: Fri, 8 Jan 2021 15:36:21 +0000
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From: Bin Meng <bin.meng@windriver.com>
This adds the target guide for SABRE Lite board, and documents how
to boot a Linux kernel and U-Boot bootloader.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alex Benn=C3=A9e <alex.bennee@linaro.org>
Message-id: 20210106063504.10841-5-bmeng.cn@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
docs/system/arm/sabrelite.rst | 119 ++++++++++++++++++++++++++++++++++
docs/system/target-arm.rst | 1 +
2 files changed, 120 insertions(+)
create mode 100644 docs/system/arm/sabrelite.rst
diff --git a/docs/system/arm/sabrelite.rst b/docs/system/arm/sabrelite.rst
new file mode 100644
index 00000000000..71713310e3a
--- /dev/null
+++ b/docs/system/arm/sabrelite.rst
@@ -0,0 +1,119 @@
+Boundary Devices SABRE Lite (``sabrelite``)
+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
+
+Boundary Devices SABRE Lite i.MX6 Development Board is a low-cost developm=
ent
+platform featuring the powerful Freescale / NXP Semiconductor's i.MX 6 Quad
+Applications Processor.
+
+Supported devices
+-----------------
+
+The SABRE Lite machine supports the following devices:
+
+ * Up to 4 Cortex A9 cores
+ * Generic Interrupt Controller
+ * 1 Clock Controller Module
+ * 1 System Reset Controller
+ * 5 UARTs
+ * 2 EPIC timers
+ * 1 GPT timer
+ * 2 Watchdog timers
+ * 1 FEC Ethernet controller
+ * 3 I2C controllers
+ * 7 GPIO controllers
+ * 4 SDHC storage controllers
+ * 4 USB 2.0 host controllers
+ * 5 ECSPI controllers
+ * 1 SST 25VF016B flash
+
+Please note above list is a complete superset the QEMU SABRE Lite machine =
can
+support. For a normal use case, a device tree blob that represents a real =
world
+SABRE Lite board, only exposes a subset of devices to the guest software.
+
+Boot options
+------------
+
+The SABRE Lite machine can start using the standard -kernel functionality
+for loading a Linux kernel, U-Boot bootloader or ELF executable.
+
+Running Linux kernel
+--------------------
+
+Linux mainline v5.10 release is tested at the time of writing. To build a =
Linux
+mainline kernel that can be booted by the SABRE Lite machine, simply confi=
gure
+the kernel using the imx_v6_v7_defconfig configuration:
+
+.. code-block:: bash
+
+ $ export ARCH=3Darm
+ $ export CROSS_COMPILE=3Darm-linux-gnueabihf-
+ $ make imx_v6_v7_defconfig
+ $ make
+
+To boot the newly built Linux kernel in QEMU with the SABRE Lite machine, =
use:
+
+.. code-block:: bash
+
+ $ qemu-system-arm -M sabrelite -smp 4 -m 1G \
+ -display none -serial null -serial stdio \
+ -kernel arch/arm/boot/zImage \
+ -dtb arch/arm/boot/dts/imx6q-sabrelite.dtb \
+ -initrd /path/to/rootfs.ext4 \
+ -append "root=3D/dev/ram"
+
+Running U-Boot
+--------------
+
+U-Boot mainline v2020.10 release is tested at the time of writing. To buil=
d a
+U-Boot mainline bootloader that can be booted by the SABRE Lite machine, u=
se
+the mx6qsabrelite_defconfig with similar commands as described above for L=
inux:
+
+.. code-block:: bash
+
+ $ export CROSS_COMPILE=3Darm-linux-gnueabihf-
+ $ make mx6qsabrelite_defconfig
+
+Note we need to adjust settings by:
+
+.. code-block:: bash
+
+ $ make menuconfig
+
+then manually select the following configuration in U-Boot:
+
+ Device Tree Control > Provider of DTB for DT Control > Embedded DTB
+
+To start U-Boot using the SABRE Lite machine, provide the u-boot binary to
+the -kernel argument, along with an SD card image with rootfs:
+
+.. code-block:: bash
+
+ $ qemu-system-arm -M sabrelite -smp 4 -m 1G \
+ -display none -serial null -serial stdio \
+ -kernel u-boot
+
+The following example shows booting Linux kernel from dhcp, and uses the
+rootfs on an SD card. This requires some additional command line parameters
+for QEMU:
+
+.. code-block:: none
+
+ -nic user,tftp=3D/path/to/kernel/zImage \
+ -drive file=3Dsdcard.img,id=3Drootfs -device sd-card,drive=3Drootfs
+
+The directory for the built-in TFTP server should also contain the device =
tree
+blob of the SABRE Lite board. The sample SD card image was populated with =
the
+root file system with one single partition. You may adjust the kernel "roo=
t=3D"
+boot parameter accordingly.
+
+After U-Boot boots, type the following commands in the U-Boot command shel=
l to
+boot the Linux kernel:
+
+.. code-block:: none
+
+ =3D> setenv ethaddr 00:11:22:33:44:55
+ =3D> setenv bootfile zImage
+ =3D> dhcp
+ =3D> tftpboot 14000000 imx6q-sabrelite.dtb
+ =3D> setenv bootargs root=3D/dev/mmcblk3p1
+ =3D> bootz 12000000 - 14000000
diff --git a/docs/system/target-arm.rst b/docs/system/target-arm.rst
index bde4b8e044e..edd013c7bbd 100644
--- a/docs/system/target-arm.rst
+++ b/docs/system/target-arm.rst
@@ -83,6 +83,7 @@ undocumented; you can get a complete list by running
arm/versatile
arm/vexpress
arm/aspeed
+ arm/sabrelite
arm/digic
arm/musicpal
arm/gumstix
--=20
2.20.1