[PATCH v4 00/13] Modernise powerpc 40x

[Christophe Leroy]

v1 and v2 of this series were aiming at removing 40x entirely,
but it led to protests.

v3 is trying to start modernising powerpc 40x:
- Rework TLB miss handlers to not use PTE_ATOMIC_UPDATES and _PAGE_HWWRITE
- Remove old versions of 40x processors, namely 403 and 405GP and associated
errata.
- Last two patches are trivial changes in TLB miss handlers to reduce number
of scratch registers.

v4:
- Fixing a build failure with patch 2 due to a missing ;
- There was in patch 5 some stuff belonging to patch 6. Moved them.
- Rebased to today's powerpc/merge

I would have liked to test it with QEMU, but I get the following error when
trying to start QEMU for machine ref405ep.

	qemu-system-ppc: Could not load PowerPC BIOS 'ppc405_rom.bin'

Can someone help with that ?

Christophe Leroy (12):
  powerpc/40x: Rework 40x PTE access and TLB miss
  powerpc/pgtable: Drop PTE_ATOMIC_UPDATES
  powerpc/40x: Remove support for IBM 403GCX
  powerpc/40x: Remove STB03xxx
  powerpc/40x: Remove WALNUT
  powerpc/40x: Remove EP405
  powerpc/40x: Remove support for ISS Simulator
  powerpc/40x: Remove support for IBM 405GP
  powerpc/40x: Remove IBM405 Erratum #51
  powerpc: Remove IBM405 Erratum #77
  powerpc/40x: Avoid using r12 in TLB miss handlers
  powerpc/40x: Don't save CR in SPRN_SPRG_SCRATCH6

Michal Simek (1):
  powerpc: Remove Xilinx PPC405/PPC440 support

 Documentation/devicetree/bindings/xilinx.txt | 143 ------
 Documentation/powerpc/bootwrapper.rst        |  28 +-
 arch/powerpc/Kconfig.debug                   |   2 +-
 arch/powerpc/boot/Makefile                   |  14 +-
 arch/powerpc/boot/dts/Makefile               |   1 -
 arch/powerpc/boot/dts/ep405.dts              | 230 ---------
 arch/powerpc/boot/dts/virtex440-ml507.dts    | 406 ----------------
 arch/powerpc/boot/dts/virtex440-ml510.dts    | 466 -------------------
 arch/powerpc/boot/dts/walnut.dts             | 246 ----------
 arch/powerpc/boot/ep405.c                    |  71 ---
 arch/powerpc/boot/ops.h                      |   1 -
 arch/powerpc/boot/serial.c                   |   5 -
 arch/powerpc/boot/treeboot-walnut.c          |  81 ----
 arch/powerpc/boot/uartlite.c                 |  79 ----
 arch/powerpc/boot/virtex.c                   |  97 ----
 arch/powerpc/boot/virtex405-head.S           |  31 --
 arch/powerpc/boot/wrapper                    |   8 -
 arch/powerpc/configs/40x/acadia_defconfig    |   1 -
 arch/powerpc/configs/40x/ep405_defconfig     |  62 ---
 arch/powerpc/configs/40x/kilauea_defconfig   |   1 -
 arch/powerpc/configs/40x/klondike_defconfig  |   1 -
 arch/powerpc/configs/40x/makalu_defconfig    |   1 -
 arch/powerpc/configs/40x/obs600_defconfig    |   1 -
 arch/powerpc/configs/40x/virtex_defconfig    |  75 ---
 arch/powerpc/configs/44x/virtex5_defconfig   |  74 ---
 arch/powerpc/configs/ppc40x_defconfig        |   9 -
 arch/powerpc/configs/ppc44x_defconfig        |   8 -
 arch/powerpc/include/asm/asm-405.h           |  19 -
 arch/powerpc/include/asm/atomic.h            |  11 -
 arch/powerpc/include/asm/bitops.h            |   4 -
 arch/powerpc/include/asm/cache.h             |   2 +-
 arch/powerpc/include/asm/cmpxchg.h           |  11 -
 arch/powerpc/include/asm/futex.h             |   3 -
 arch/powerpc/include/asm/nohash/32/pgtable.h |  33 --
 arch/powerpc/include/asm/nohash/32/pte-40x.h |  23 +-
 arch/powerpc/include/asm/nohash/64/pgtable.h |  27 --
 arch/powerpc/include/asm/nohash/pgtable.h    |   2 -
 arch/powerpc/include/asm/reg_booke.h         |  54 ---
 arch/powerpc/include/asm/spinlock.h          |   4 -
 arch/powerpc/include/asm/time.h              |  12 -
 arch/powerpc/include/asm/xilinx_intc.h       |  16 -
 arch/powerpc/include/asm/xilinx_pci.h        |  21 -
 arch/powerpc/kernel/cputable.c               | 102 ----
 arch/powerpc/kernel/entry_32.S               |  11 -
 arch/powerpc/kernel/head_40x.S               | 316 +++----------
 arch/powerpc/kernel/misc_32.S                |   9 -
 arch/powerpc/kernel/setup-common.c           |   4 -
 arch/powerpc/mm/nohash/40x.c                 |   4 +-
 arch/powerpc/platforms/40x/Kconfig           |  76 ---
 arch/powerpc/platforms/40x/Makefile          |   3 -
 arch/powerpc/platforms/40x/ep405.c           | 123 -----
 arch/powerpc/platforms/40x/virtex.c          |  54 ---
 arch/powerpc/platforms/40x/walnut.c          |  65 ---
 arch/powerpc/platforms/44x/Kconfig           |  40 +-
 arch/powerpc/platforms/44x/Makefile          |   2 -
 arch/powerpc/platforms/44x/virtex.c          |  60 ---
 arch/powerpc/platforms/44x/virtex_ml510.c    |  30 --
 arch/powerpc/platforms/Kconfig               |   4 -
 arch/powerpc/sysdev/Makefile                 |   2 -
 arch/powerpc/sysdev/xilinx_intc.c            |  88 ----
 arch/powerpc/sysdev/xilinx_pci.c             | 132 ------
 drivers/char/Kconfig                         |   2 +-
 drivers/video/fbdev/Kconfig                  |   2 +-
 63 files changed, 83 insertions(+), 3430 deletions(-)
 delete mode 100644 arch/powerpc/boot/dts/ep405.dts
 delete mode 100644 arch/powerpc/boot/dts/virtex440-ml507.dts
 delete mode 100644 arch/powerpc/boot/dts/virtex440-ml510.dts
 delete mode 100644 arch/powerpc/boot/dts/walnut.dts
 delete mode 100644 arch/powerpc/boot/ep405.c
 delete mode 100644 arch/powerpc/boot/treeboot-walnut.c
 delete mode 100644 arch/powerpc/boot/uartlite.c
 delete mode 100644 arch/powerpc/boot/virtex.c
 delete mode 100644 arch/powerpc/boot/virtex405-head.S
 delete mode 100644 arch/powerpc/configs/40x/ep405_defconfig
 delete mode 100644 arch/powerpc/configs/40x/virtex_defconfig
 delete mode 100644 arch/powerpc/configs/44x/virtex5_defconfig
 delete mode 100644 arch/powerpc/include/asm/asm-405.h
 delete mode 100644 arch/powerpc/include/asm/xilinx_intc.h
 delete mode 100644 arch/powerpc/include/asm/xilinx_pci.h
 delete mode 100644 arch/powerpc/platforms/40x/ep405.c
 delete mode 100644 arch/powerpc/platforms/40x/virtex.c
 delete mode 100644 arch/powerpc/platforms/40x/walnut.c
 delete mode 100644 arch/powerpc/platforms/44x/virtex.c
 delete mode 100644 arch/powerpc/platforms/44x/virtex_ml510.c
 delete mode 100644 arch/powerpc/sysdev/xilinx_intc.c
 delete mode 100644 arch/powerpc/sysdev/xilinx_pci.c

-- 
2.25.0