xref: /src/sys/arch/ia64/TODO

$ NetBSD: TODO,v 1.1 2018/04/14 12:06:03 scole Exp $

What works:
  The ski simulator (pkgsrc/emulators/ski) works on NetBSD/i386, can run
  and step through in assembly.

  Netbooting may work on some machines, basically you need to boot
  diskless with the loader.efi (from src/sys/arch/ia64/stand/ia64/)
  using dhcpd and put the kernel in a nfs accessible directory.  There
  is info here https://www.netbsd.org/docs/network/netboot/ and
  http://gnats.netbsd.org/49717 about how to setup.

  Also, a successful report of booting off the CD is here
  http://mail-index.netbsd.org/port-ia64/2009/06/18/msg000102.html

Tasks remaining:
- context switching and forking appear unfinished,
  vm_machdep.c::cpu_lwp_fork() appears incomplete
- pmap module, imported from freebsd but still needs more work and testing
- IA64 Stack unwind code: Support remaining unwind descriptor
  types. (See arch/ia64/unwind/TODO). ddb() traces need to print line
  information also.  Seems like there are a few options:
   1) fix and finish current unwind that is minimal, incomplete, and buggy
   2) import FreeBSD/ia64 implementation, may be derived from HP originally:
      http://lists.llvm.org/pipermail/cfe-dev/2016-September/050649.html
   3) import this version
      https://www.nongnu.org/libunwind/man/libunwind-ia64(3).html
      originally written by one of ia64 gurus but still looks maintained
      and portable
   4) something else
- kernel with LOCKDEBUG option crashes in pmap startup somewhere
- redo _regset.h in netbsd style with __greg_t __gregset_t
- implement ld.elf_so, MK_DYNAMICROOT
- fix memory detection, on real hardware doesn't find all memory
- implement interrupts (sacpi & pci)
- MKGDB for ia64
- implement fp[gs]etsticky, [make|get|set|swap]context
- floating point, fenv functions were imported from freebsd, but only compile tested
- implement core_machdep.c
- implement __cloneS ptrace.S sbrk.S shmat.S
- implement kvm_ia64.c
- implement pmc (performance monitoring counters) for ia64 pmc registers
- implement ia64 md code for cpuctl, intrctl as needed
- optional(?) mutex.h/lock_stubs.S, mutex_enter()/mutex_exit() __HAVE_MUTEX_STUBS
       mutex_spin_enter()/mutex_spin_exit() __HAVE_SPIN_MUTEX_STUBS
- rwlock.h rw_enter(),rw_exit(),rw_tryenter() __HAVE_RW_STUBS, implemented already?
- add efipart_dev to read gpt/ffs disks for bootloader
- sort out bootloader/loader.efi stuff, make it more like netbsd and
  less like freebsd, command to boot nfs from loader.efi instead of
  hack that exists now
- ia64 implement __HAVE_FAST_SOFTINTS?
- want or need __HAVE_CPU_UAREA_ROUTINES, cpu_uarea_alloc,  cpu_uarea_free
- fix all "[Nn]ot yet" and "XXX" functions everywhere
- create/fix sys/arch/ia64/include/pci_machdep.h and implement actual functions,
  need to handle "multiple" pci busses like from http://www.openpa.net/systems/il/rp3400-bus.txt,
  add pchb, looks like one here
   http://mail-index.netbsd.org/port-ia64/2010/06/29/msg000116.html
  and/or could port from freebsd
- Kernel module pre-loading via the bootloader
- SMP
- write console and/or X framebuffer driver.  freebsd has vgapci
  device that may be portable
- add ia32 emulation, port from freebsd
- installation media for EFI/cdrom/usb

ski emulator tasks:
- some commands in ski are not yet implemented. 2 important ones
  are still missing, "cstack" and "pm", which view the stack and
  source code lines respectively 
- create a ski network driver
- create a ski disk driver
- fix ski to run on other archs beside i386, or at least amd64

Pie in the sky:
- Xen and itanium!
- qemu and itanium