title: Do ARM processors/OS for ARM - have security rings?
body: <p>I wonder, do ARM processors have special registers to suppport the idea of security rings and do such operating systems like Android, Palm or anothers support security rings?</p>
  
  <p>In WIKI , there is info, that ARM proccessors don't have such registers as x86 for supporting such type of work.</p>
  
  <p>But, I think that register is just the place with fixed size , where you can put and take info?
  So, the concept/idea of security rings is on OS only or x86-processors really have special registers for these aims , but on ARM - only OS is supporting this mode?</p>
  
  <p>Am I right or not?
  Thanks,</p>
  
  <p>I have googled and wikied this topic, but there only few information, which isn't full.</p>
  
  <p>Thanks, best regards,</p>