[PATCH v2 0/6] powerpc: convert cache asm to C

[Alastair D'Silva]

From: Alastair D'Silva <alastair@xxxxxxxxxxx>

This series addresses a few issues discovered in how we flush caches:
1. Flushes were truncated at 4GB, so larger flushes were incorrect.
2. Flushing the dcache in arch_add_memory was unnecessary

This series also converts much of the cache assembler to C, with the
aim of making it easier to maintain.

Alastair D'Silva (6):
  powerpc: Allow flush_icache_range to work across ranges >4GB
  powerpc: define helpers to get L1 icache sizes
  powerpc: Convert flush_icache_range & friends to C
  powerpc: Chunk calls to flush_dcache_range in arch_*_memory
  powerpc: Remove 'extern' from func prototypes in cache headers
  powerpc: Don't flush caches when adding memory

Changelog:
 V2:
     - Replace C implementation of flush_dcache_icache_phys() with
       inline assembler authored by Christophe Leroy
     - Add memory clobbers for iccci implementation
     - Give __flush_dcache_icache a real implementation, it can't
       just be a wrapper around flush_icache_range()
     - Remove PPC64_CACHES from misc_64.S
     - Replace code duplicating clean_dcache_range() in
       flush_icache_range() with a call to clean_dcache_range()
     - Replace #ifdef CONFIG_44x with IS_ENABLED(...) in
       flush_icache_cange()
     - Use 1GB chunks instead of 16GB in arch_*_memory


 arch/powerpc/include/asm/cache.h      |  63 ++++++----
 arch/powerpc/include/asm/cacheflush.h |  37 +++---
 arch/powerpc/kernel/misc_32.S         | 117 -------------------
 arch/powerpc/kernel/misc_64.S         | 102 -----------------
 arch/powerpc/mm/mem.c                 | 159 +++++++++++++++++++++++++-
 5 files changed, 213 insertions(+), 265 deletions(-)

-- 
2.21.0