On 12/14/2016 10:52 AM, Neil Armstrong wrote: > Hi Heinrich, > > Thanks for testing and for the report, > we are still struggling into finding what are these zones and how to label them correctly. > > We need to identify the zones on all boards, the patch I provided works on a non-odroid-c2 and gxm and gxl boards. > > Neil > Hello Neil, the configuration below works for me on the Hardkernel Odroid C2. ramoops is needed for CONFIG_PSTORE_RAM. Debian Stretch has CONFIG_PSTORE_RAM=m. Same is true for Fedora. I have chosen the address arbitrarily. To accommodate 512 MB boards we would have to put it below 0x20000000. The size parameters are the same as in hisilicon/hi6220-hikey.dts and qcom-apq8064-asus-nexus7-flo.dts. linux,cma is used for contiguous memory assignment. I have taken the align parameter from arm-src-kernel-2016-08-18-26e194264c.tar.gz provided by Amlogic at http://openlinux.amlogic.com:8000/download/ARM/kernel/ . See Documentation/DMA-API.txt for the usage of align. They use the same value 0x400000 for all GXBB boards. So we want to put this zone into meson-gxbb.dtsi. secmon is used by drivers/firmware/meson/meson_sm.c. Amlogic uses the same address range for all 64bit boards. memory@0 { device_type = "memory"; linux,usable-memory = <0x0 0x1000000 0x0 0x7f000000>; }; reserved-memory { #address-cells = <0x2>; #size-cells = <0x2>; ranges; ramoops@0x23f00000 { compatible = "ramoops"; reg = <0x0 0x23f00000 0x0 0x100000>; record-size = <0x20000>; console-size = <0x20000>; ftrace-size = <0x20000>; }; secmon: secmon { compatible = "amlogic, aml_secmon_memory"; reg = <0x0 0x10000000 0x0 0x200000>; no-map; }; linux,cma { compatible = "shared-dma-pool"; reusable; size = <0x0 0xbc00000>; alignment = <0x0 0x400000>; linux,cma-default; }; }; Best regards Heinrich Schuchardt -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
