linux.git/arch/arm/include/asm/pgtable.h, branch v2.6.32 Linux kernel source tree ARM: implement highpte 2009-08-17T19:02:06+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-08-17T19:02:06+00:00 65cec8e3db606608fd1f8dfc4a1c7c37bfba9173 Add the ARM implementation of highpte, which allows PTE tables to be placed in highmem. Unfortunately, we do not offer highpte support when support for L2 cache is enabled. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add the ARM implementation of highpte, which allows PTE tables to be
placed in highmem.  Unfortunately, we do not offer highpte support
when support for L2 cache is enabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] pgtable: rearrange file PTE bit allocation 2009-07-11T15:59:39+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-07-11T15:57:20+00:00 6a00cded91532f3d58e07729ba56269339281d8e For future compatibility, we need to ensure that swap and file Linux PTEs conform with the hardware PTEs "fault" encoding. Swap PTEs already fit in with this, but file PTEs do not. Shift them by one bit to ensure that they conform, using bit 2 to distinguish between swap and file PTEs. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
For future compatibility, we need to ensure that swap and file Linux
PTEs conform with the hardware PTEs "fault" encoding.  Swap PTEs
already fit in with this, but file PTEs do not.  Shift them by one
bit to ensure that they conform, using bit 2 to distinguish between
swap and file PTEs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] remove L_PTE_BUFFERABLE and L_PTE_CACHEABLE 2009-07-11T15:55:52+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-07-11T15:51:40+00:00 f7a55fa6ecef8be6d15bd79a803e44a3187ce9d6 These old symbols are meaningless now that we have memory type support implemented. The entire memory type field needs to be modified rather than just a few bits twiddled. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
These old symbols are meaningless now that we have memory type
support implemented.  The entire memory type field needs to be
modified rather than just a few bits twiddled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] pgtable: file pte layout documentation 2009-07-05T14:31:35+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-07-05T10:52:21+00:00 65b1bfc13e8f50034187e339aa12b81cd6785bd5 Document the layout of our file PTE entries. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Document the layout of our file PTE entries.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] pgtable: swp pte layout documentation, definitions, and check 2009-07-05T14:31:26+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-07-05T10:30:15+00:00 fb93a1c75eb646fde35985e9af23da936775ae52 Document the layout of our swp PTE entries, adding definitions for the bit masks/shifts/sizes, and implement MAX_SWAPFILES_CHECK() such that we fail to build if we are unable to properly encode the swp type field. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Document the layout of our swp PTE entries, adding definitions for
the bit masks/shifts/sizes, and implement MAX_SWAPFILES_CHECK()
such that we fail to build if we are unable to properly encode the
swp type field.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Convert pmd_page() to be highmem safe 2009-04-26T12:14:52+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2009-04-26T12:14:52+00:00 924a158a12c7e732179dd85ddd20848039e7bd71 In the long run, we may want to place page tables in highmem. However, pmd_page() has traditionally been coded to convert the physical address to a virtual one, which won't work with highmem pages. Instead, translate the physical address to a PFN, and then convert the PFN to a struct page instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
In the long run, we may want to place page tables in highmem.  However,
pmd_page() has traditionally been coded to convert the physical address
to a virtual one, which won't work with highmem pages.  Instead,
translate the physical address to a PFN, and then convert the PFN to a
struct page instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Merge branch 'ptebits' into devel 2008-10-09T20:31:56+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-10-09T20:31:56+00:00 6a4690c22f5da1eb1c898b61b6a80da52fbd976f Conflicts: arch/arm/Kconfig 
Conflicts:

	arch/arm/Kconfig
[ARM] Improve non-executable support 2008-10-01T15:41:10+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-09-07T16:16:54+00:00 8ec53663d2698076468b3e1edc4e1b418bd54de3 Add support for detecting non-executable stack binaries, and adjust permissions to prevent execution from data and stack areas. Also, ensure that READ_IMPLIES_EXEC is enabled for older CPUs where that is true, and for any executable-stack binary. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Add support for detecting non-executable stack binaries, and adjust
permissions to prevent execution from data and stack areas.  Also,
ensure that READ_IMPLIES_EXEC is enabled for older CPUs where that
is true, and for any executable-stack binary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Remove MT_DEVICE_IXP2000 and associated definitions 2008-10-01T15:41:06+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-09-07T11:42:51+00:00 db5b7169474882fabbd811a4cf5c1bae3157e677 As of the previous commit, MT_DEVICE_IXP2000 encodes to the same PTE bit encoding as MT_DEVICE, so it's now redundant. Convert MT_DEVICE_IXP2000 to use MT_DEVICE instead, and remove its aliases. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
As of the previous commit, MT_DEVICE_IXP2000 encodes to the same
PTE bit encoding as MT_DEVICE, so it's now redundant.  Convert
MT_DEVICE_IXP2000 to use MT_DEVICE instead, and remove its aliases.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Convert ARMv6 and ARMv7 to use new memory types 2008-10-01T15:41:00+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2008-09-06T20:07:45+00:00 639b0ae7f5bcd645862a9c3ea2d4321475c71d7a Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>