Subversion Repositories HelenOS

Last modification

• Rev 2264 2007-04-09 18:21:47
• Author: jermar

• Log message:

  Fix a nasty bug in the TLB miss handlers on sparc64.
  After we no longer lock the kernel stack in the DTLB,
  there is a real danger of nested DTLB misses. The nested
  miss can very easily clobber the DTLB Tag Access register.
  Therefore, the original miss may not read this register, but
  it has to receive its value as an argument. The argument
  value is saved in the trap table when it is guaranteed that
  the nested TLB miss will not occur.