On 04/30/2018 10:26 AM, Chang, Abner (HPS SW/FW Technologist) wrote:
On 30 April 2018 at 16:00, Ard Biesheuvel ard.biesheuvel@linaro.org wrote:
On 30 April 2018 at 15:57, Chang, Abner (HPS SW/FW Technologist)
Also, eMMC controllers (which are more widely used on mobile platforms as the only available storage controller) use DMA under the OS, which complicates things even further when attempting to share such a controller between the OS and the firmware.
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Agree with this. May need other implementations like cache in memory during boot service and write back to partition by OS for this case.
Strongly agree here. Working out such a procedure is the best option for platforms that do not have a dedicated SPI/I2C storage option that can be dedicated to firmware.