[PATCH] powerpc: Merge cacheflush.h and cache.h

The ppc32 and ppc64 versions of cacheflush.h were almost identical.
The two versions of cache.h are fairly similar, except for a bunch of
register definitions in the ppc32 version which probably belong better
elsewhere.  This patch, therefore, merges both headers.  Notable
points:
	- there are several functions in cacheflush.h which exist only
on ppc32 or only on ppc64.  These are handled by #ifdef for now, but
these should probably be consolidated, along with the actual code
behind them later.
	- Confusingly, both ppc32 and ppc64 have a
flush_dcache_range(), but they're subtly different: it uses dcbf on
ppc32 and dcbst on ppc64, ppc64 has a flush_inval_dcache_range() which
uses dcbf.  These too should be merged and consolidated later.
	- Also flush_dcache_range() was defined in cacheflush.h on
ppc64, and in cache.h on ppc32.  In the merged version it's in
cacheflush.h
	- On ppc32 flush_icache_range() is a normal function from
misc.S.  On ppc64, it was wrapper, testing a feature bit before
calling __flush_icache_range() which does the actual flush.  This
patch takes the ppc64 approach, which amounts to no change on ppc32,
since CPU_FTR_COHERENT_ICACHE will never be set there, but does mean
renaming flush_icache_range() to __flush_icache_range() in
arch/ppc/kernel/misc.S and arch/powerpc/kernel/misc_32.S
	- The PReP register info from asm-ppc/cache.h has moved to
arch/ppc/platforms/prep_setup.c
	- The 8xx register info from asm-ppc/cache.h has moved to a
new asm-powerpc/reg_8xx.h, included from reg.h
	- flush_dcache_all() was defined on ppc32 (only), but was
never called (although it was exported).  Thus this patch removes it
from cacheflush.h and from ARCH=powerpc (misc_32.S) entirely.  It's
left in ARCH=ppc for now, with the prototype moved to ppc_ksyms.c.

Built for Walnut (ARCH=ppc), 32-bit multiplatform (pmac, CHRP and PReP
ARCH=ppc, pmac and CHRP ARCH=powerpc).  Built and booted on POWER5
LPAR (ARCH=powerpc and ARCH=ppc64).

Built for 32-bit powermac (ARCH=ppc and ARCH=powerpc).  Built and
booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64).  Built and booted
on G5 (ARCH=powerpc)

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 49 deletions

diff --git a/include/asm-ppc/cacheflush.h b/include/asm-ppc/cacheflush.h
deleted file mode 100644
index 6a243efb3317..000000000000
--- a/include/asm-ppc/cacheflush.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * include/asm-ppc/cacheflush.h
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- */
-#ifdef __KERNEL__
-#ifndef _PPC_CACHEFLUSH_H
-#define _PPC_CACHEFLUSH_H
-
-#include <linux/mm.h>
-
-/*
- * No cache flushing is required when address mappings are
- * changed, because the caches on PowerPCs are physically
- * addressed.  -- paulus
- * Also, when SMP we use the coherency (M) bit of the
- * BATs and PTEs.  -- Cort
- */
-#define flush_cache_all()		do { } while (0)
-#define flush_cache_mm(mm)		do { } while (0)
-#define flush_cache_range(vma, a, b)	do { } while (0)
-#define flush_cache_page(vma, p, pfn)	do { } while (0)
-#define flush_icache_page(vma, page)	do { } while (0)
-#define flush_cache_vmap(start, end)	do { } while (0)
-#define flush_cache_vunmap(start, end)	do { } while (0)
-
-extern void flush_dcache_page(struct page *page);
-#define flush_dcache_mmap_lock(mapping)		do { } while (0)
-#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
-
-extern void flush_icache_range(unsigned long, unsigned long);
-extern void flush_icache_user_range(struct vm_area_struct *vma,
-		struct page *page, unsigned long addr, int len);
-
-#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
-do { memcpy(dst, src, len); \
-     flush_icache_user_range(vma, page, vaddr, len); \
-} while (0)
-#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
-	memcpy(dst, src, len)
-
-extern void __flush_dcache_icache(void *page_va);
-extern void __flush_dcache_icache_phys(unsigned long physaddr);
-extern void flush_dcache_icache_page(struct page *page);
-#endif /* _PPC_CACHEFLUSH_H */
-#endif /* __KERNEL__ */