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path: root/ArmPkg/Library/UncachedMemoryAllocationLib
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2017-04-27ArmPkg: Remove unused PackageGuo Mang
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Guo Mang <mang.guo@intel.com>
2017-03-15ArmPkg/UncachedMemoryAllocationLib: set XP bit via CPU arch protocolArd Biesheuvel
Commit e7b24ec9785d ("ArmPkg/UncachedMemoryAllocationLib: map uncached allocations non-executable") adds code that manipulates the GCD memory space attributes of a newly allocated uncached region without checking whether this region expose these attributes in its capabilities mask. Given that the intent is to remove executable permissions from the region, this is a fairly pointless exercise to begin with, regardless of whether it is correct or not. The reason is that RO/XP memory attributes in the GCD memory space map or the UEFI memory map are completely disconnected from the actual mapping permissions used in the page tables. So instead, invoke the CPU arch protocol directly, and add the non-exec attributes in the page tables directly. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> Tested-by: Ryan Harkin <ryan.harkin@linaro.org>
2017-03-08ArmPkg/UncachedMemoryAllocationLib: map uncached allocations non-executableArd Biesheuvel
The primary use case for UncachedMemoryAllocationLib is non-coherent DMA, which implies that such regions are not used to fetch instructions from. So let's map them as non-executable, to avoid creating a security hole when the rest of the platform may be enforcing strict memory permissions on ordinary allocations. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
2017-03-08ArmPkg/UncachedMemoryAllocationLib: use CWG value to align pool allocationsArd Biesheuvel
Uncached pool allocations are aligned to the data cache line length under the assumption that this is sufficient to prevent cache maintenance from corrupting adjacent allocations. However, the value to use in such cases is architecturally called the Cache Writeback Granule (CWG), which is essentially the maximum Dcache line length rather than the minimum. Note that this is mostly a cosmetical fix, given that the pool allocation is turned into a page allocation later, and rounded up accordingly. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
2017-03-08ArmPkg/UncachedMemoryAllocationLib: restore mapping attributes after freeArd Biesheuvel
In order to play nice with platforms that use strict memory permission policies, restore the original mapping attributes when freeing uncached allocations. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
2015-11-25ArmPkg/UncachedMemoryAllocationLib: fix warning about uninitialized local varEugene Cohen
RVCT (the proprietary 32-bit ARM compiler) warns about Node potentially being used uninitialized, so initialize it to NULL explicitly. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Eugene Cohen <eugene@hp.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18952 6f19259b-4bc3-4df7-8a09-765794883524
2015-11-23ArmPkg: Invalidate cache after allocating UC memoryHeyi Guo
It is implied that the memory returned from UncachedMemoryAllocationLib should have cache invalidated. So we invalidate memory range after changing memory attribute to uncached. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Heyi Guo <heyi.guo@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18920 6f19259b-4bc3-4df7-8a09-765794883524
2015-09-02ArmPkg: Bug fix for UncachedMemoryAllocationLibHeyi Guo
NewNode is the node we found, while Node is the last node in the list. Also update mFreedBufferSize. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Heyi Guo <heyi.guo@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18390 6f19259b-4bc3-4df7-8a09-765794883524
2014-10-10ArmPkg/UncachedMemoryAllocationLib: Track uncached memory allocationsOlivier Martin
Keeping track of uncached memory allocations prevents doing expensive cache operations (eg: clean & invalidate) on newly allocated regions by reusing regions where possible Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16205 6f19259b-4bc3-4df7-8a09-765794883524
2014-08-19ARM Packages: Removed trailing spacesRonald Cron
Trailing spaces create issue/warning when generating/applying patches. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ronald Cron <ronald.cron@arm.com> Reviewed-By: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15833 6f19259b-4bc3-4df7-8a09-765794883524
2013-07-16ArmPkg/UncachedMemoryAllocationLib: Removed unused header (Protocol/Cpu.h)Olivier Martin
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14469 6f19259b-4bc3-4df7-8a09-765794883524
2013-07-15ArmPkg: Fix UncachedFreeAlignedPages in UncachedMemoryAllocationLibEugene Cohen
Route both the setting and restoring of cacheability through DXE Services/GCD and stop using the CPU AP directly. The patch also removes all references to the CPU AP which eliminates the need for a library constructor. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Eugene Cohen <eugene@hp.com> Reviewed-by: Senthil Ramakrishnan <senthil.ramakrishnan@hp.com> Reviewed-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14468 6f19259b-4bc3-4df7-8a09-765794883524
2013-01-25ARM Packages: Fixed line endingsoliviermartin
This large code change only modifies the line endings to be CRLF to be compliant with the EDK2 coding convention document. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14088 6f19259b-4bc3-4df7-8a09-765794883524
2012-08-31ArmPkg: Changed Uncached System Memory from EFI_MEMORY_UC to EFI_MEMORY_WColiviermartin
EFI_MEMORY_UC is mapped to Strongly Ordered memory while EFI_MEMORY_WC is mapped to Uncached Normal/System memory. This change improve performance while accessing uncached regions in the System Memory. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Eugene Cohen <eugene@hp.com> Reviewed-by: Olivier Martin <oliviermartin@arm.com git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13693 6f19259b-4bc3-4df7-8a09-765794883524
2011-07-18ArmPkg/UncachedMemoryAllocationLib: Use gDS function to set memory attributesoliviermartin
Calling directly the CPU Architectural protocol does not update the GCD. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12024 6f19259b-4bc3-4df7-8a09-765794883524
2010-04-29Update the copyright notice formathhtian
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10444 6f19259b-4bc3-4df7-8a09-765794883524
2010-02-16Fix bug in UncachedMemoryAllocationLib, Assembler, make ↵andrewfish
DefaultExceptionHandler lib inc the PC past the faulting instruction to aid debug. Update LR in Exception hanlder, so return address can get updated properly. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10018 6f19259b-4bc3-4df7-8a09-765794883524
2010-02-10Clean up UncachedMemoryAllocationLib to use CPU AP.andrewfish
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9960 6f19259b-4bc3-4df7-8a09-765794883524
2010-01-17Missed a fix in the Cpu Driver. Added some more debug for Execption handling ↵AJFISH
and clean up some uncached stuff. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9789 6f19259b-4bc3-4df7-8a09-765794883524
2010-01-12Need to add some extra functions to the libraries to support paging in the ↵AJFISH
CpuDxe driver (still working on that). Also looks like some of the .INF file hade the token used to search replace the copyright headers and not the headers so I updated that. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9716 6f19259b-4bc3-4df7-8a09-765794883524
2009-12-06Adding support for BeagleBoard. AJFISH
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers. EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell. BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine). git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
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