This patchset tries to address a discrepancy between the C3700 machine
in QEMU/SeaBIOS and the documentation (chapter 5)

  http://ftp.parisc-linux.org/docs/whitepapers/PA-8700wp.pdf

where 40 bits of physical address space are used in SeaBIOS compared
to the 44 bits specified in the documentation.

A PA-8500 CPU with 40 bits of physical address space is added to be
used with the A400 machine.  AFAICT there are no major differences
from QEMUs side between the PA-8500 and 8700 aside from the physical
address space size.  The PA-8700 machine can then be moved to using
44 bits.  To account for the discrepancy with SeaBIOS, the functional
tests now run the A400.

This series introduces a small restructuring to the HPPA CPU class
heirarchy. CPU model definitions now inherit from a TYPE_HPPA_CPU base
class and use a HPPACPUDef struct to provide model specifics, similar
to the SPARC and RISCV targets.  This hopefully makes it easier to add
other models, such as the 8800/8900.

Signed-off-by: Anton Johansson <anjo@rev.ng>
---
Changes in v5:
- Moved assert on maximum size of the physical address space to base
  class initialization function, so it's only ran once.
- Clarified commit message in final patch.
- Link to v4: https://lore.kernel.org/qemu-devel/20260302-hppa-c3600-v4-0-447a800da8cc@rev.ng

Changes in v4:
- Add PA-8500 instead of PA-8600 and use the now upstreamed A400
  machine.
- Link to v3: https://lore.kernel.org/qemu-devel/20260218-hppa-c3600-v3-0-b37ad58a20dd@rev.ng

Changes in v3:
- Fixed spelling in commit message/comment
- Rebased
- Dropped if statement in hppa_cpu_class_base_init() (patch
  "hppa: Introduce HPPACPUDef").  Not needed as it will simply
  be set to NULL for the abstract base class anyway.
- Link to v2: https://lore.kernel.org/qemu-devel/20260210-hppa-c3600-v2-0-9ca09c677012@rev.ng

Changes in v2:
- Missed a reference to the old "hppa" CPU model, updated to
  "pa-7300lc".
- Link to v1: https://lore.kernel.org/qemu-devel/20260210-hppa-c3600-v1-0-a17ec58f053f@rev.ng

---
Anton Johansson (4):
      hppa: Restructure CPU Class heirarchy
      hppa: Introduce HPPACPUDef
      hppa: Get physical address space bits from HPPACPUDef
      hppa: Use 44 bit physical addresses for PA-8700

 target/hppa/cpu-qom.h                 |  8 ++++-
 target/hppa/cpu.h                     | 35 ++++++++++++++++-----
 hw/hppa/machine.c                     | 25 +++++++++------
 hw/pci-host/astro.c                   |  2 +-
 linux-user/hppa/elfload.c             |  2 +-
 target/hppa/cpu.c                     | 57 +++++++++++++++++++++++++++--------
 target/hppa/mem_helper.c              | 39 +++++++-----------------
 tests/qtest/machine-none-test.c       |  2 +-
 tests/functional/hppa/test_seabios.py |  4 +--
 9 files changed, 111 insertions(+), 63 deletions(-)