MIPS: BCM47XX: improve memory size detection
The memory size is detected by finding a place where it repeats in memory. Currently we are just checking when the function prom_init is seen again, but it is better to check for a bigger part of the memory to decrease the chance of wrong results. This should fix a problem we saw in OpenWrt, where the detected available memory decreed on some devices when doing a soft reboot. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Patchwork: http://patchwork.linux-mips.org/patch/4362Signed-off-by: John Crispin <blogic@openwrt.org>
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