Topic: Linux kernel record to the physical address. How?
I write the driver for not which (video card). It is necessary the data from in storage of the device. I do here under this description (probably it too old): http://www.tldp.org/LDP/khg/HyperNews/g xlate.html I Do here so: char * baseptr = ioremap (0xFC000000, 1024*1024);/* write a ' A ' to the offset 10 of the area *///actually here//here I should write down a cycle in video storage mbyte,//which begins with physical 0xFC000000 writeb address (' A ', baseptr+10);/* unmap when we unload the driver */iounmap (baseptr); And happens nothing. Well that is, works, the screen is lit, but on the screen a chaotic mash of points. Images are not present. Without (and any other OS) the same works. I WRITE to the necessary area of storage, the picture is. It means that hardware problems are not present. A kernel 2.6.* (I Know that different versions of a kernel can have different mechanisms of operation with storage) Help to understand! Is better stick with the link.