linux/arch/powerpc/mm
Benjamin Herrenschmidt bc033b63bb powerpc/mm: Fix attribute confusion with htab_bolt_mapping()
The function htab_bolt_mapping() is used to create permanent
mappings in the MMU hash table, for example, in order to create
the linear mapping of vmemmap.  It's also used by early boot
ioremap (before mem_init_done).

However, the way ioremap uses it is incorrect as it passes it the
protection flags in the "linux PTE" form while htab_bolt_mapping()
expects them in the hash table format.  This is made more confusing by
the fact that some of those flags are actually in the same position in
both cases.

This fixes it all by making htab_bolt_mapping() take normal linux
protection flags instead, and use a little helper to convert them to
htab flags. Callers can now use the usual PAGE_* definitions safely.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

 arch/powerpc/include/asm/mmu-hash64.h |    2 -
 arch/powerpc/mm/hash_utils_64.c       |   65 ++++++++++++++++++++--------------
 arch/powerpc/mm/init_64.c             |    9 +---
 3 files changed, 44 insertions(+), 32 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-08-11 10:09:56 +10:00
..
40x_mmu.c [POWERPC] Remove and replace uses of PPC_MEMSTART with memstart_addr 2008-04-17 07:46:12 +10:00
44x_mmu.c powerpc: rework 4xx PTE access and TLB miss 2008-07-09 13:36:17 -04:00
fault.c powerpc: BookE hardware watchpoint support 2008-07-25 15:44:39 +10:00
fsl_booke_mmu.c [POWERPC] 85xx: Add support for relocatable kernel (and booting at non-zero) 2008-04-24 20:58:01 +10:00
gup.c powerpc/mm: Lockless get_user_pages_fast() for 64-bit (v3) 2008-07-30 15:26:54 +10:00
hash_low_32.S [POWERPC] powerpc/mm/hash_low_32.S: Remove CVS keyword 2008-05-20 09:34:18 +10:00
hash_low_64.S powerpc: Free a PTE bit on ppc64 with 64K pages 2008-06-30 22:30:53 +10:00
hash_native_64.c [POWERPC] Use 1TB segments 2007-10-12 14:05:17 +10:00
hash_utils_64.c powerpc/mm: Fix attribute confusion with htab_bolt_mapping() 2008-08-11 10:09:56 +10:00
hugetlbpage.c powerpc: Disable 64K hugetlb support when doing 64K SPU mappings 2008-07-28 16:30:53 +10:00
init_32.c powerpc: Fix problems with 32bit PPC's running with >= 4GB of RAM 2008-07-09 14:13:01 -04:00
init_64.c powerpc/mm: Fix attribute confusion with htab_bolt_mapping() 2008-08-11 10:09:56 +10:00
Makefile powerpc/mm: Lockless get_user_pages_fast() for 64-bit (v3) 2008-07-30 15:26:54 +10:00
mem.c powerpc: Fix compiler warning in arch/powerpc/mm/mem.c 2008-08-04 13:18:17 +10:00
mmap.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
mmu_context_32.c [POWERPC] Remove the dregs of APUS support from arch/powerpc 2007-06-14 22:30:15 +10:00
mmu_context_64.c [POWERPC] Tidy up CONFIG_PPC_MM_SLICES code 2007-08-17 11:01:59 +10:00
mmu_decl.h powerpc: Fix problems with 32bit PPC's running with >= 4GB of RAM 2008-07-09 14:13:01 -04:00
numa.c mm: move bootmem descriptors definition to a single place 2008-07-24 10:47:14 -07:00
pgtable_32.c powerpc ioremap_prot 2008-07-24 10:47:15 -07:00
pgtable_64.c powerpc ioremap_prot 2008-07-24 10:47:15 -07:00
ppc_mmu_32.c powerpc: Force printing of 'total_memory' to unsigned long long 2008-08-04 13:18:17 +10:00
slb_low.S [POWERPC] vmemmap fixes to use smaller pages 2008-05-15 20:49:25 +10:00
slb.c [POWERPC] vmemmap fixes to use smaller pages 2008-05-15 20:49:25 +10:00
slice.c Merge commit 'origin/master' 2008-07-16 11:07:59 +10:00
stab.c [POWERPC] Fix sparse warnings in arch/powerpc/mm 2008-05-14 22:31:46 +10:00
subpage-prot.c [POWERPC] Provide a way to protect 4k subpages when using 64k pages 2008-01-24 10:06:01 +11:00
tlb_32.c powerpc: tlb_32.c build fix 2007-07-21 17:49:16 -07:00
tlb_64.c powerpc: Move include files to arch/powerpc/include/asm 2008-08-04 12:02:00 +10:00