[microblaze-uclinux] Reading and writing memory mapped registers

[Vassilis Koratzinos <bkor@xxxxxxxxxxx>]

I have a fully functional microblaze-uclinux system including a user 
peripheral with memory mapped registers.
Is the following code correct in order to read/write these registers?

int adr =0;
int size = 0;
volatile int *regfile = (int *) REGFILE_BASEADDR;
…
//to write:
regfile[adr]=dat;
…
//to read:
dat=regfile[adr]

With this code I am getting ‘unstable’ results which differ by 1 bit 
randomly at every access.

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