Archipelago » qemu

(to be completed)

Alpha emulation structure:

cpu.h           : CPU definitions globally exported

exec.h          : CPU definitions used only for translated code execution

helper.c        : helpers that can be called either by the translated code

                  or the Qemu core, including the exception handler.

op.c            : Alpha dedicated micro-operations used by the code translator

op_helper.c     : helpers that can be called only from micro-operations

op_helper.h     : micro-operations helpers prototypes

op_helper_mem.h : micro-operations templates

                  for load and stores accesses helpers

op_mem.h        : micro-operations templates for load and stores accesses

op_template.h   : micro-operation templates for register moves

translate.c     : Alpha instructions to micro-operations translator

Code translator status:

The Alpha CPU instruction emulation should be quite complete with the

limitation that the VAX floating-point load and stores are not implemented.

The 4 MMU modes are implemented.

Linux user mode emulation status:

a few programs start to run. Most crash at a certain point, dereferencing a

NULL pointer. It seems that the UNIQUE register is not initialized properly.

It may appear that old executables, not relying on TLS support, run but

this is to be prooved...

Full system emulation status:

* Alpha PALCode emulation is in a very early stage and is not sufficient

  to run any real OS. The alpha-softmmu target is not enabled for now.

* no hardware platform description is implemented

* there might be problems in the Alpha PALCode dedicated instructions

  that would prevent to use a native PALCode image.