#20939: Astoria ARV7519RW22 dts out of bounds of flash memory
--------------------------+------------------------
Reporter: howl | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: base system | Version: Trunk
Resolution: | Keywords:
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Comment (by howl):
According to the size reported by BRN-BOOT of the Flash indeed it should
be as it's defined now, from 0xB0000000 to 0xB2000000. But that leaves
215K of undefined space at the end of the memory because boardconfig is
indeed 256K as is in the patch and also checked in a memory dump.
So the patch should be:
{{{
--- a/target_linux_lantiq_dts_ARV7519RW22.dts 2015-11-18
23:31:34.780122560 +0100
+++ b/target_linux_lantiq_dts_ARV7519RW22.dts 2015-11-18
23:44:16.705647525 +0100
@@ -18,7 +18,7 @@
nor-boot@0 {
compatible = "lantiq,nor";
bank-width = <2>;
- reg = <0 0x0 0x2000000>;
+ reg = <0 0x0 0x1FC0000>;
#address-cells = <1>;
#size-cells = <1>;
}}}
Looking at the memory areas reported by brn-boot:
{{{
---------------------------------------
Area Address Length
---------------------------------------
[0] Boot 0xB0000000 512K
[1] Image 0 0xB1280000 6144K
[2] Image 1 0xB1880000 6144K
[3] Configuration 0xB1E80000 1024K
[4] Boot Parameters 0xB1F80000 256K
[5] Flash Image 0xB0000000 32768K
[6] Linux Image 0xB0080000 24576K
[7] Emergency Value 0xB1FC0000 2883584K
---------------------------------------
}}}
leaves the Emergency Value area beginning in the last 256K of the Flash
memory, but then It can't be in flash as it's bigger.
Perhaps the last 256K can be used fron uboot-env to allow newer U-Boots to
be able to boot this board. I not able to find the use of the last 256K of
the memory, a dump of it shows thats it's all 0x00 except 0x1FFFFFFC that
it's 0xFF.
--
Ticket URL: <https://dev.openwrt.org/ticket/20939#comment:1>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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