Edits responding to comments from Udit Kumar
Suggested-by: Udit Kumar udit.kumar@nxp.com Signed-off-by: Grant Likely grant.likely@arm.com --- source/chapter1-about.rst | 16 +++++++++------- source/chapter4-firmware-media.rst | 3 ++- 2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/source/chapter1-about.rst b/source/chapter1-about.rst index a2561d6..1dafd39 100644 --- a/source/chapter1-about.rst +++ b/source/chapter1-about.rst @@ -10,7 +10,7 @@ between platform firmware and an operating system that is suitable for embedded platforms. EBBR compliant platforms present a consistent interface that will boot an EBBR compliant operating system without any custom tailoring required. -For example, an Arm A-class embedded networking platform will benefit +For example, an Arm A-class embedded platform will benefit from a standard interface that supports features such as secure boot and firmware update.
@@ -149,12 +149,14 @@ Operating System.
This specification is similar to the Arm Server Base Boot Requirements specification [SBBR]_ in that it defines the firmware interface presented to an -operating system, with SBBR having stricter requirements on hardware and -firmware than EBBR. -EBBR allows for design decisions that are common in the embedded space, but not -supported by the server ecosystem. -For example, an embedded system may use a single eMMC storage device to hold -both firmware and operating system images. +operating system. +SBBR is targeted at the server ecosystem and places strict requirements on the +platform to ensure cross vendor interoperability. +EBBR on the other hand allows more flexibility to support embedded designs +which do not fit within the SBBR model. +For example, a platform that isn't SBBR compliant because the SoC is only +supported using Devicetree could be EBBR compliant, but not SBBR compliant. + By definition, all SBBR compliant systems are also EBBR compliant, but the converse is not true.
diff --git a/source/chapter4-firmware-media.rst b/source/chapter4-firmware-media.rst index 604df18..39a1c03 100644 --- a/source/chapter4-firmware-media.rst +++ b/source/chapter4-firmware-media.rst @@ -4,7 +4,8 @@ Firmware Storage
In general, EBBR compliant platforms should use dedicated storage for boot firmware images and data, -independent of the storage used for OS partitions and the ESP. +independent of the storage used for OS partitions and the EFI System Partition +(ESP). This could be a physically separate device (e.g. SPI flash), or a dedicated logical unit (LU) within a device (e.g. eMMC boot partition, [#eMMCBootPartition]_ -- 2.13.0
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