[Skiboot] [PATCH v4 00/15] little endian skiboot

[Nicholas Piggin]

A few reasons for this:
- The rest of the software is moving (moved) to LE. BE is still
  supported, but the fact is LE will be better tested from now on in
  terms of toolchain.
- ELFv2 ABI is a smaller image, nicer asm code. We can use ELFv2 with BE
  but toolchain won't officially support or test it.
- Some levels of OpenPOWER ISA allow a conforming implementation to
  implement LE only.
- Less stack usage of ELFv2 facilitates OPAL call convention that uses
  the host kernel stack (which is a whole different story but has
  benefits).
- Common endian with the host kernel can help with debugging skiboot
  with host kernel facilities (like BUG, xmon). We could achieve the
  same by teaching kernel about different endianness, but it's more work.

Mostly missing from conversion:
- PHB3
- NPU and CAPI code

XICS, XICS-on-XIVE, KVM, VAS, and niche features have not been tested
yet, but at this point it's complete enough that it's easy to work on
and improve so I think it is ready for proper submission now.

Since v1:
- Addressed review comments
- Added a missed endian conversion in hw/fsp/fsp.c
- Added a patch on the end to tidy up dt access
- xive patch is not for merge, (pending Cedric's stuff) but included
  so the series can boot on real hardware.

Since v2:
- Remove a few bits of dead POWER7 code

Since v3:
- Several fixes to cvc code, including a stack trashing bug that would
  sometimes result in skiboots that failed container verification,
  depending on where the compiler put things.

Nicholas Piggin (15):
  asm/cvc_entry.S: r2 save fix
  Remove dead POWER7 code
  capp: fix endian conversion
  cpu: use dt accessor device tree access
  opal-api: add endian conversions to most opal calls
  spira: fix endian conversions in spira data structures
  fixup_spira remove incorrect endian conversion
  naca: move naca definition from asm to C
  io: endian conversions for io accessors
  xive: make endian-clean
  phb4: make endian-clean
  occ sensors: make endian-clean
  memconsole: make endian-clean
  add little endian support
  dt: assorted cleanups

 Makefile.main                            |  38 ++-
 asm/asm-offsets.c                        |   2 -
 asm/cvc_entry.S                          |  51 ++-
 asm/head.S                               | 126 +++-----
 core/console.c                           |  41 ++-
 core/cpu.c                               |  26 +-
 core/device.c                            |   8 +
 core/fdt.c                               |   4 +-
 core/init.c                              |   1 +
 core/interrupts.c                        |  12 +-
 core/ipmi-opal.c                         |   6 +-
 core/pci-opal.c                          |  98 ++++--
 core/pci.c                               |  36 +--
 core/powercap.c                          |  14 +-
 core/psr.c                               |  14 +-
 core/sensor.c                            |  36 ++-
 doc/stb.rst                              |   2 +-
 hdata/Makefile.inc                       |   2 +-
 hdata/fsp.c                              |   7 +-
 hdata/hdata.h                            |   2 +
 hdata/iohub.c                            |  21 +-
 hdata/memory.c                           |  10 +-
 hdata/naca.c                             |  26 ++
 hdata/naca.h                             |  54 ++++
 hdata/paca.c                             |  82 +----
 hdata/spira.c                            |  68 ++--
 hdata/spira.h                            |   2 +
 hw/capp.c                                |   2 +-
 hw/fake-rtc.c                            |  11 +-
 hw/fsp/fsp-console.c                     |  26 +-
 hw/fsp/fsp-rtc.c                         |  26 +-
 hw/fsp/fsp-sysparam.c                    |   4 +-
 hw/fsp/fsp.c                             |   2 +-
 hw/imc.c                                 |   4 +-
 hw/ipmi/ipmi-rtc.c                       |  12 +-
 hw/lpc-rtc.c                             |  12 +-
 hw/lpc-uart.c                            |  16 +-
 hw/lpc.c                                 |   6 +-
 hw/npu2-opencapi.c                       |  12 +-
 hw/occ-sensor.c                          | 100 +++---
 hw/occ.c                                 |  24 +-
 hw/phb4.c                                | 323 +++++++++----------
 hw/psi.c                                 |   8 +-
 hw/vas.c                                 |   9 +-
 hw/xive.c                                | 386 ++++++++++++-----------
 hw/xscom.c                               |  19 +-
 include/asm-utils.h                      |  22 +-
 include/console.h                        |  22 +-
 include/cpu.h                            |   3 +
 include/device.h                         |   1 +
 include/elf.h                            |   4 +
 include/io.h                             |  72 ++++-
 include/mem-map.h                        |   2 +
 include/occ.h                            |  50 +--
 include/phb4.h                           |   2 +-
 include/stack.h                          |   6 +
 include/xive.h                           |  50 +--
 libflash/ipmi-hiomap.c                   |  18 +-
 libflash/mbox-flash.c                    |  18 +-
 libpore/p9_cpu_reg_restore_instruction.H |  23 +-
 libstb/cvc.c                             |  16 +-
 libstb/cvc.h                             |   2 +-
 platforms/ibm-fsp/common.c               |   4 +-
 platforms/ibm-fsp/hostservices.c         |  12 +-
 platforms/mambo/mambo.c                  |   7 +-
 skiboot.lds.S                            |   5 +
 66 files changed, 1217 insertions(+), 913 deletions(-)
 create mode 100644 hdata/naca.c
 create mode 100644 hdata/naca.h

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2.23.0