CL-SOM-iMX7: U-Boot: Firmware Overview - Revision history

Grinberg at 12:20, 26 October 2017

2017-10-26T12:20:38Z

Grinberg: /* Boot sources */

2017-07-12T14:01:09Z

‎Boot sources

Ilya: /* Introduction */

2016-12-08T08:26:40Z

‎Introduction

New page

== Introduction ==
This article describes the firmware for CL-SOM-iMX7 system-on-module.
CL-SOM-iMX7 firmware consists of  a single binary: U-Boot image.

The i.MX7 boot ROM tries to boot  U-Boot from either SD card, or SPI flash, as determined by the hardware boot selector (ALT BOOT button).

U-Boot initializes hardware modules necessary for system boot and loads the operating system.

=== Package contents ===
<pre>
cl-som-imx7-u-boot/
├── images
│   └── cl-som-imx7-firmware
├── README.txt
└── u-boot
├── patches
│   ├── 0001-arm-imx7d-add-support-for-Compulab-cl-som-imx7.patch
│   ├── ...
│   └── 0008-arm-imx7d-cl-som-imx7-add-extraversion.patch
├── u-boot-v2016.09-cl-som-imx7-0.91.bin
└── u-boot-v2016.09-cl-som-imx7-0.91.patch
</pre>

==== images ====
* {{filename|cl-som-imx7-firmware}} - CL-SOM-iMX7 firmware binary

==== u-boot ====
* {{filename|u-boot-v2016.09-cl-som-imx7-0.91.bin}} - U-Boot binary
* {{filename|u-boot-v2016.09-cl-som-imx7-0.91.patch}} - patch vs. v2016.09 mainline U-Boot
* {{filename|patches}} - ordered collection of patches, that form the single patch above (u-boot-v2016.09-cl-som-imx7-0.91.patch)

== U-Boot ==
U-Boot is the bootloader used on CL-SOM-iMX7. It allows flexible selection of operating system boot modes, provides scripting facilities and command line interface through a serial port.
U-Boot allows booting operating system from the on-board eMMC flash, removable storage (e.g. USB drive, SD/MMC card), or the network (TFTP/NFS server).

Please consult [[U-Boot quick reference]] and [http://www.denx.de/wiki/U-Boot/Documentation U-Boot project documentation] for U-Boot features and commands description.

=== U-Boot environment ===
U-Boot environment resides on the SPI flash, regardless of the boot source. The environment resides at offset 0xC0000 from the start of SPI flash, and its size is 8KiB.

== Boot sources ==
CM-FX6 can boot from either a micro SD card, or the on-board SPI flash.

The following sections describe the layout of each storage type.

=== Default SPI flash mapping ===
{| cellpadding="3" border="1" style="border: 1px solid rgb(85, 85, 85); border-collapse: collapse;"
! Offset
! Description
! Size
|-
| 0KB
| U-Boot
| 768KB
|-
| 768KB
| U-Boot environment
| 256KB
|-
| 1MB
| Splash image
| Remaining SPI flash space
|}

=== Default SD card mapping ===
{| cellpadding="3" border="1" style="border: 1px solid rgb(85, 85, 85); border-collapse: collapse;"
! Offset
! Description
! Size
|-
| 0KB
| Reserved/MBR
| 1KB
|-
| 1KB
| U-Boot
| ~1MB
|-
| 1MB
| Remaining SD-card space
| Remaining SD-card space
|}

[[Category:U-Boot]]
[[Category:CL-SOM-iMX7]]

@@ Line 1: / Line 1: @@
 == Introduction ==
 This article describes the firmware for CL-SOM-iMX7 system-on-module / Computer-on-Module.
-CL-SOM-iMX7 firmware consists of a single binary: U-Boot image.
+CL-SOM-iMX7 firmware consists of two components: Secondary Program Loader (SPL) and U-Boot.
 The i.MX7 boot ROM tries to boot U-Boot from either SD card, or SPI flash, as determined by the hardware boot selector (ALT BOOT button).
-U-Boot initializes hardware modules necessary for system boot and loads the operating system.
+SPL performs minimal hardware initializations and loads U-Boot. U-Boot initializes hardware modules necessary for system boot and loads the operating system.
-== U-Boot ==
+{{:Transclusion: CL-SOM-iMX7: U-Boot: Firmware Overview}}
-Please consult [[U-Boot quick reference]] and [http://www.denx.de/wiki/U-Boot/Documentation U-Boot project documentation] for U-Boot features and commands description.
+== See also ==
-=== U-Boot environment ===
+* [[CL-SOM-iMX7: U-Boot: Firmware Update|Firmware Update]]
-U-Boot environment resides on the SPI flash, regardless of the boot source. The environment resides at offset 0xC0000 from the start of SPI flash, and its size is 8KiB.
+* [[U-Boot: Quick reference]]
+* [[U-Boot images]]
-== Boot sources ==
+* [http://www.denx.de/wiki/U-Boot/Documentation U-Boot documentation]
 [[Category:U-Boot]]
 [[Category:CL-SOM-iMX7]]

@@ Line 1: / Line 1: @@
 == Introduction ==
-This article describes the firmware for CL-SOM-iMX7 system-on-module.
+This article describes the firmware for CL-SOM-iMX7 system-on-module / Computer-on-Module.
-CL-SOM-iMX7 firmware consists of <!--two components provided in--> a single binary: <!--Secondary Program Loader (SPL) and -->U-Boot image.
+CL-SOM-iMX7 firmware consists of a single binary: U-Boot image.
-<!--SPL is the bootstrap utility invoked by the CPU internal boot ROM code of the i.MX7 SoC.-->
+The i.MX7 boot ROM tries to boot U-Boot from either SD card, or SPI flash, as determined by the hardware boot selector (ALT BOOT button).
 U-Boot initializes hardware modules necessary for system boot and loads the operating system.
 == U-Boot ==
@@ Line 41: / Line 15: @@
 == Boot sources ==
-CM-FX6 can boot from either a micro SD card, or the on-board SPI flash.
+CL-SOM-iMX7 can boot from either a micro SD card, or the on-board SPI flash.
 The following sections describe the layout of each storage type.
-=== Default SPI flash mapping ===
+=== Default CL-SOM-iMX7 storage device mapping ===
 {| cellpadding="3" border="1" style="border: 1px solid rgb(85, 85, 85); border-collapse: collapse;"
 ! Offset
 ! Description
 |-
-| 0KB
+| 0x0 (0KB)
 | U-Boot
 |-
-| 768KB
+| 0xc0000 (768KB)
 | U-Boot environment
 |-
-| 1MB
+| 0x100000 (1MB)
 | Splash image
 |}
 {| cellpadding="3" border="1" style="border: 1px solid rgb(85, 85, 85); border-collapse: collapse;"
 ! Offset
 ! Description
 ! Size
 |-
-| 0KB
+| 0x0 (0KB)
 | Reserved/MBR
 |-
-| 1KB
+| 0x400 (1KB)
 | U-Boot
 |-
-| 1MB
+| 0x100000 (1MB)
 | Remaining SD-card space
 |}
 [[Category:U-Boot]]
 [[Category:CL-SOM-iMX7]]