[PATCH v5 00/13] Modernise powerpc 40x

From: Christophe Leroy
Date: Thu May 21 2020 - 12:55:56 EST

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

v5:
- Rebase on top of 35a26089dd1c Automatic merge of 'next-test' into merge-test (2020-05-22 00:14)

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 | 16 -
arch/powerpc/include/asm/nohash/32/pte-40x.h | 23 +-
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 +-
62 files changed, 83 insertions(+), 3386 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

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2.25.0