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Subject[PATCH v2 0/6] powerpc: convert cache asm to C
From: Alastair D'Silva <>

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

- 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
- 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(-)


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