[PATCH 0/4] MIPS: Support auto-detecting ARCH_PFN_OFFSET / PHYS_OFFSET

Paul Burton <paul.burton@xxxxxxxx> · Fri, 27 Jul 2018 18:23:17 -0700

This series fixes a couple of issues we currently have with use of
PHYS_OFFSET, introduces the ability to auto-detect a suitable value for
it from the boot memory map & enables that for the generic platform.
This allows generic kernels to run on systems where the base address of
physical memory is higher than zero without wasting memory on
book-keeping for the unused region between zero & that base address.

Applies cleanly atop mips-next as of commit a999933db9ed ("MIPS: remove
mips_swiotlb_ops").

Thanks,
    Paul

Paul Burton (4):
  MIPS: Make (UN)CAC_ADDR() PHYS_OFFSET-agnostic
  MIPS: Fix ISA virt/bus conversion for non-zero PHYS_OFFSET
  MIPS: Allow auto-dection of ARCH_PFN_OFFSET & PHYS_OFFSET
  MIPS: generic: Select MIPS_AUTO_PFN_OFFSET

 arch/mips/Kconfig                           |  4 ++++
 arch/mips/include/asm/io.h                  |  8 ++++----
 arch/mips/include/asm/mach-ar7/spaces.h     |  3 ---
 arch/mips/include/asm/mach-generic/spaces.h | 10 +++++++---
 arch/mips/include/asm/mach-pic32/spaces.h   |  1 -
 arch/mips/include/asm/page.h                | 11 ++++++++---
 arch/mips/jazz/jazzdma.c                    |  2 +-
 arch/mips/kernel/setup.c                    | 14 ++++++++++++--
 arch/mips/mm/dma-noncoherent.c              |  2 +-
 9 files changed, 37 insertions(+), 18 deletions(-)

-- 
2.18.0