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2012-01-26ARM: pgtable: get rid of TOP_PTE()Russell King1-4/+4
Get rid of the TOP_PTE() macro as we now have proper accessor functions instead. No one should be directly referencing the top pte table anymore. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-01-26ARM: pgtable: provide get_top_pte() to complement set_top_pte()Russell King1-0/+5
Provide get_top_pte() to complement set_top_pte(), moving the only users of TOP_PTE to arch/arm/mm/mm.h. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-01-26ARM: pgtable: consolidate set_pte_ext(TOP_PTE,...) + tlb flushRussell King1-0/+6
A number of places establish a PTE in our top page table and immediately flush the TLB. Rather than having this at every callsite, provide an inline function for this purpose. This changes some global tlb flushes to be local; each time we setup one of these mappings, we always do it with preemption disabled which would prevent us migrating to another CPU. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-01-26ARM: pgtable: move TOP_PTE address definitions to arch/arm/mm/mm.hRussell King1-0/+13
Move the TOP_PTE address definitions to one central place so that it's easy to discover what they're being used for. This helps to ensure that there are no overlaps. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-11-26ARM: add generic ioremap optimization by reusing static mappingsNicolas Pitre1-0/+14
Now that we have all the static mappings from iotable_init() located in the vmalloc area, it is trivial to optimize ioremap by reusing those static mappings when the requested physical area fits in one of them, and so in a generic way for all platforms. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Tested-by: Stephen Warren <swarren@nvidia.com> Tested-by: Kevin Hilman <khilman@ti.com> Tested-by: Jamie Iles <jamie@jamieiles.com>
2011-10-06ARM: 7076/1: LPAE: Add (pte|pmd)val_t type definitions as u32Catalin Marinas1-2/+2
This patch defines the (pte|pmd)val_t as u32 and changes the page table types to be based on these. The PMD bits are converted to the corresponding type using the _AT macro. The flush_pmd_entry/clean_pmd_entry argument was changed to (void *) to allow them to be used with both PGD and PMD pointers and avoid code duplication. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-12ARM: dma: replace ISA_DMA_THRESHOLD with a variableRussell King1-0/+6
ISA_DMA_THRESHOLD has been unused by non-arch code, so lets now get rid of it from ARM by replacing it with arm_dma_zone_mask. Move dma_supported() and dma_set_mask() out of line, and have dma_supported() check this new variable instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-26ARM: kill pmd_off()Russell King1-6/+1
pmd_off() has only one user, so lets consolidate this into its only user. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-21ARM: pgtable: add pud-level codeRussell King1-1/+1
Add pud_offset() et.al. between the pgd and pmd code in preparation of using pgtable-nopud.h rather than 4level-fixup.h. This incorporates a fix from Jamie Iles <jamie@jamieiles.com> for uaccess_with_memcpy.c. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-26ARM: pgtable: introduce pteval_t to represent a pte valueRussell King1-1/+1
This makes everywhere dealing with pte values use the same type. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-07-27ARM: Convert platform reservations to use LMB rather than bootmemRussell King1-2/+1
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-07-27ARM: initial LMB trialRussell King1-1/+1
Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-07-16ARM: Move platform memory reservations out of generic codeRussell King1-1/+2
Move the platform specific bootmem memory reservations out of arch/arm/mm/mmu.c into their respective platform files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-07-16ARM: Remove DISCONTIGMEM supportRussell King1-3/+1
Everything should now be using sparsemem rather than discontigmem, so remove the code supporting discontigmem from ARM. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-05-15ARM: Move memory mapping into mmu.cRussell King1-3/+0
Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-12-04ARM: Reduce __flush_dcache_page() visibilityRussell King1-0/+2
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-03-15[ARM] fixmap supportNicolas Pitre1-2/+1
This is the minimum fixmap interface expected to be implemented by architectures supporting highmem. We have a second level page table already allocated and covering 0xfff00000-0xffffffff because the exception vector page is located at 0xffff0000, and various cache tricks already use some entries above 0xffff0000. Therefore the PTEs covering 0xfff00000-0xfffeffff are free to be used. However the XScale cache flushing code already uses virtual addresses between 0xfffe0000 and 0xfffeffff. So this reserves the 0xfff00000-0xfffdffff range for fixmap stuff. The Documentation/arm/memory.txt information is updated accordingly, including the information about the actual top of DMA memory mapping region which didn't match the code. Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-12-01[ARM] use asm/sections.hRussell King1-2/+0
Update to use the asm/sections.h header rather than declaring these symbols ourselves. Change __data_start to _data to conform with the naming found within asm/sections.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-28[ARM] rationalize memory configuration code some moreNicolas Pitre1-1/+1
Currently there are two instances of struct meminfo: one in kernel/setup.c marked __initdata, and another in mm/init.c with permanent storage. Let's keep only the later to directly populate the permanent version from arm_add_memory(). Also move common validation tests between the MMU and non-MMU cases into arm_add_memory() to remove some duplication. Protection against overflowing the membank array is also moved in there in order to cover the kernel cmdline parsing path as well. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-10-09Merge branch 'ptebits' into develRussell King1-1/+0
Conflicts: arch/arm/Kconfig
2008-10-01[ARM] remove 'prot_pte_ext' from memory type tableRussell King1-1/+0
This member is now redundant; the memory type is encoded in the Linux PTE bits. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-06[ARM] clean up a load of old declarationsRussell King1-0/+2
... some of which are now in linux/*.h headers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-04-21[ARM] mm 6: allow mem_types table to specify extended pte attributesRussell King1-0/+1
Add prot_pte_ext to the mem_types table to allow the extended pte attributes to be passed to set_pte_ext(), thereby permitting us to specify memory type information for the hardware PTE entries. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-04-21[ARM] mm 5: Use mem_types table in ioremapRussell King1-0/+9
We really want to be using the memory type table in ioremap, so we only have to do the CPU type fixups in one place. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-11-30[ARM] Fix nommu buildRussell King1-0/+5
Fix warnings and errors in arch/arm/mm for nommu build. Remove commented out function prototype in pgtable-nommu.h Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-09-27[ARM] Move rest of MMU setup code from mm-armv.c to mmu.cRussell King1-1/+0
If we're going to have mmu.c for code which is specific to the MMU machines, we might as well move the other MMU initialisation specific code from mm-armv.c into this new file. This also allows us to make some functions static. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-09-27[ARM] Split ARM MM initialisation for !mmuRussell King1-0/+4
Move the MMU specific code from init.c into mmu.c, and add nommu fixups to nommu.c Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-09-20[ARM] Cleanup arch/arm/mm a littleRussell King1-0/+19
Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm references it. Move the repeated definition of TOP_PTE into mm/mm.h, as well as a few function prototypes. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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