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* ARM: Fix sparsemem with SPARSEMEM_EXTREME enabledRussell King2009-10-291-1/+19
| | | | | | | | | | | When SPARSEMEM_EXTREME is enabled, memory_present() wants to use bootmem to allocate data structures. However, we call memory_present() after declaring memory to bootmem, but before we've reserved areas. This leads to sparsemem data structures being overwritten later in the kernel's initialization (when slab initializes.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: 5747/1: Fix the start_pg value in free_memmap()Catalin Marinas2009-10-071-1/+1
| | | | | | | | | | If sparsemem is enabled, the start_pfn passed to the free_memmap() function corresponds to an area of memory not known to the kernel and pfn_to_page returns a wrong value. The (start_pfn - 1), however, is known to the kernel. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge branch 'origin' into for-linusRussell King2009-09-241-2/+2
|\ | | | | | | | | Conflicts: MAINTAINERS
| * arches: drop superfluous casts in nr_free_pages() callersGeert Uytterhoeven2009-09-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 96177299416dbccb73b54e6b344260154a445375 ("Drop free_pages()") modified nr_free_pages() to return 'unsigned long' instead of 'unsigned int'. This made the casts to 'unsigned long' in most callers superfluous, so remove them. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Howells <dhowells@redhat.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Chris Zankel <zankel@tensilica.com> Cc: Michal Simek <monstr@monstr.eu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | ARM: 5580/2: ARM TCM (Tightly-Coupled Memory) support v3Linus Walleij2009-09-151-0/+8
|/ | | | | | | | | | | | | This adds the TCM interface to Linux, when active, it will detect and report TCM memories and sizes early in boot if present, introduce generic TCM memory handling, provide a generic TCM memory pool and select TCM memory for the U300 platform. See the Documentation/arm/tcm.txt for documentation. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* ARM: Fix pfn_valid() for sparse memoryRussell King2009-09-121-0/+32
| | | | | | | | | | | | | | | On OMAP platforms, some people want to declare to segment up the memory between the kernel and a separate application such that there is a hole in the middle of the memory as far as Linux is concerned. However, they want to be able to mmap() the hole. This currently causes problems, because update_mmu_cache() thinks that there are valid struct pages for the "hole". Fix this by making pfn_valid() slightly more expensive, by checking whether the PFN is contained within the meminfo array. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Khasim Syed Mohammed <khasim@ti.com>
* ARM: Fix broken highmem supportRussell King2009-08-151-45/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, highmem is selectable, and you can request an increased vmalloc area. However, none of this has any effect on the memory layout since a patch in the highmem series was accidentally dropped. Moreover, even if you did want highmem, all memory would still be registered as lowmem, possibly resulting in overflow of the available virtual mapping space. The highmem boundary is determined by the highest allowed beginning of the vmalloc area, which depends on its configurable minimum size (see commit 60296c71f6c5063e3c1f1d2619ca0b60940162e7 for details on this). We should create mappings and initialize bootmem only for low memory, while the zone allocator must still be told about highmem. Currently, memory nodes which are completely located in high memory are not supported. This is not a huge limitation since systems relying on highmem support are unlikely to have discontiguous memory with large holes. [ A similar patch was meant to be merged before commit 5f0fbf9ecaf3 and be available in Linux v2.6.30, however some git rebase screw-up of mine dropped the first commit of the series, and that goofage escaped testing somehow as well. -- Nico ] Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Nicolas Pitre <nico@marvell.com>
* [ARM] mem_init(): make highmem pages available for useNicolas Pitre2009-03-151-3/+18
| | | | Signed-off-by: Nicolas Pitre <nico@marvell.com>
* [ARM] Fix virtual to physical translation macro corner casesRussell King2009-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | The current use of these macros works well when the conversion is entirely linear. In this case, we can be assured that the following holds true: __va(p + s) - s = __va(p) However, this is not always the case, especially when there is a non-linear conversion (eg, when there is a 3.5GB hole in memory.) In this case, if 's' is the size of the region (eg, PAGE_SIZE) and 'p' is the final page, the above is most definitely not true. So, we must ensure that __va() and __pa() are only used with valid kernel direct mapped RAM addresses. This patch tweaks the code to achieve this. Tested-by: Charles Moschel <fred99@carolina.rr.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] use asm/sections.hRussell King2008-12-011-6/+7
| | | | | | | | 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>
* [ARM] mem_init() cleanupsNicolas Pitre2008-11-281-21/+24
| | | | | | | | | | | Make free_area() arguments pfn based, and return number of freed pages. This will simplify highmem initialization later. Also, codepages, datapages and initpages are actually codesize, datasize and initsize. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] rationalize memory configuration code some moreNicolas Pitre2008-11-281-6/+6
| | | | | | | | | | | | | | | 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>
* [ARM] mm: finish ARM sparsemem supportRussell King2008-10-011-29/+57
| | | | | | | | | ... including some comments about the ordering required to bring sparsemem up. You have to repeatedly guess, test, reguess, try again and again to work out what the right ordering is. Many hours later... Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] mm: provide helpers for accessing membanksRussell King2008-10-011-31/+28
| | | | | | | | Provide helpers for getting physical addresses or pfns from the meminfo array, and use them. Move for_each_nodebank() to asm/setup.h alongside the meminfo structure definition. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] mm: move validation of membanks to one placeRussell King2008-09-301-8/+1
| | | | | | | | The newly introduced sanity_check_meminfo() function should be used to collect all validation of the meminfo array, which we have in bootmem_init(). Move it there. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] clean up a load of old declarationsRussell King2008-09-061-2/+0
| | | | | | ... some of which are now in linux/*.h headers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] move initrd code from kernel/setup.c to mm/init.cRussell King2008-09-061-2/+37
| | | | | | | This quietens some sparse warnings about phys_initrd_start and phys_initrd_size. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] initrd: claim initrd memory exclusivelyRussell King2008-07-301-12/+20
| | | | | | | | | | | | Claim the initrd memory exclusively, and order other memory reservations beforehand. This allows us to determine whether the initrd memory was overwritten, and disable the initrd in that case. This avoids a 'bad page state' bug. Tested-by: Ralph Siemsen <ralphs@netwinder.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* mm: drop unneeded pgdat argument from free_area_init_node()Johannes Weiner2008-07-241-1/+1
| | | | | | | | | | | | | free_area_init_node() gets passed in the node id as well as the node descriptor. This is redundant as the function can trivially get the node descriptor itself by means of NODE_DATA() and the node's id. I checked all the users and NODE_DATA() seems to be usable everywhere from where this function is called. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [ARM] remove redundant display of free swap space in show_mem()Johannes Weiner2008-04-191-2/+0
| | | | | | Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Introduce flags for reserve_bootmem()Bernhard Walle2008-02-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | This patchset adds a flags variable to reserve_bootmem() and uses the BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions between crashkernel area and already used memory. This patch: Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE. If that flag is set, the function returns with -EBUSY if the memory already has been reserved in the past. This is to avoid conflicts. Because that code runs before SMP initialisation, there's no race condition inside reserve_bootmem_core(). [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix powerpc build] Signed-off-by: Bernhard Walle <bwalle@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [ARM] Remove needless linux/ptrace.h includesRussell King2007-04-211-1/+0
| | | | | | | | | Lots of places in arch/arm were needlessly including linux/ptrace.h, resumably because we used to pass a struct pt_regs to interrupt handlers. Now that we don't, all these ptrace.h includes are redundant. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Fix show_mem() for discontigmemRussell King2007-01-241-4/+7
| | | | | | | | show_mem() was assuming incorrectly that the mem_map for any node started at PFN 0. This is obviously wrong; fix it to take account of node_start_pfn. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3927/1: Allow show_mem() to work with holes in memory map.Ray Lehtiniemi2006-11-071-27/+34
| | | | | | | | | | | | | | | | | show_mem() was not correctly handling holes in the memory map. It was treating the freed sections of the map as though they contained valid struct page entries. This could cause incorrect debugging output or even a kernel panic. This patch keeps the struct meminfo around after system initialization so that show_mem() can use it when scanning memory. show_mem() now walks over each bank of each online node, rather than assuming that each node contains a single contiguous bank. Signed-off-by: Ray Lehtiniemi <rayl@mail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Split ARM MM initialisation for !mmuRussell King2006-09-271-205/+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>
* [ARM] Separate page table manipulation code from bootmem initialisationRussell King2006-09-271-29/+44
| | | | | | | | nommu does not require the page table manipulation code in the bootmem initialisation paths. Move this into separate inline functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3859/1: Fix devicemaps_init() XIP_KERNEL odd 1MiB XIP_PHYS_ADDR ↵George G. Davis2006-09-271-2/+2
| | | | | | | | | | | | | | translation error The ARM XIP_KERNEL map created in devicemaps_init() is wrong. The map.pfn is rounded down to an even 1MiB section boundary which results in va/pa translations errors when XIP_PHYS_ADDR starts on an odd 1MiB boundary and this causes the kernel to hang. This patch fixes ARM XIP_KERNEL translation errors for the odd 1MiB XIP_PHYS_ADDR boundary case. Signed-off-by: George G. Davis <gdavis@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Cleanup arch/arm/mm a littleRussell King2006-09-201-13/+7
| | | | | | | | | | 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>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [ARM] Remove TABLE_SIZE, and several unused function prototypesRussell King2006-06-281-2/+0
| | | | | | | TABLE_SIZE is never used in arch/arm/mm/init.c. create_memmap_holes(), memtable_init, and setup_io_desc() no longer exist in the kernel. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Move FLUSH_BASE macros to asm/arch/memory.hRussell King2006-04-071-3/+4
| | | | | | | | | FLUSH_BASE must be visible to arch/arm/mm/init.c in order for the memory region to be setup. Move these definitions from asm-arm/arch-*/hardware.h into asm-arm/arch-*/memory.h where mm stuff can see them. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-03-221-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: (45 commits) [ARM] 3389/1: typo and grammar fix [ARM] 3386/1: AT91RM9200 Clock update [ARM] 3384/1: AT91RM9200: Timer [ARM] 3382/1: ixp2000: unify defconfigs [ARM] 3381/1: ixp2000: fix slowport write timing control register fields [ARM] 3380/1: ixp2000: simplify ixdp2x00_master_npu() check [ARM] 3379/1: ixp2000: use generic 8250 debug macros [ARM] 3378/1: ixp2000: fix gpio interrupt handling [ARM] Quieten spurious IRQ detection [ARM] Use kcalloc to allocate counter_config array rather than kmalloc [ARM] Oprofile: dynamically allocate counter_config [ARM] Oprofile: Convert semaphore to mutex [ARM] 3376/2: S3C2410 - update defconfig [ARM] 3375/1: S3C2440 - fix osiris machine build [ARM] 3374/1: ep93xx: gpio interrupt support [ARM] 3361/1: S3C24XX - add USB bus clock source [ARM] 3360/1: S3C2440 - add set rate methods and camera clock [ARM] 3359/1: S3C24XX - add support for clk_set_rate [ARM] Convert kmalloc+memset to kzalloc [ARM] 3373/1: move uengine loader to arch/arm/common ...
| * [ARM] Remove unnecessary asm/hardware.h includesRussell King2006-03-211-1/+0
| | | | | | | | | | | | | | | | | | asm/hardware.h is not required for the majority of processor support files, ioremap support, mm initialisation, acorn IO support, nor the debug code (which picks up its machine specific includes via debug-macros.S) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [PATCH] remove set_page_count() outside mm/Nick Piggin2006-03-221-1/+1
|/ | | | | | | | | | | | | set_page_count usage outside mm/ is limited to setting the refcount to 1. Remove set_page_count from outside mm/, and replace those users with init_page_count() and set_page_refcounted(). This allows more debug checking, and tighter control on how code is allowed to play around with page->_count. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [ARM] Fix some corner cases in new mm initialisationRussell King2005-11-171-11/+13
| | | | | | | | | | | | | | Document that the VMALLOC_END address must be aligned to 2MB since it must align with a PGD boundary. Allocate the vectors page early so that the flush_cache_all() later will cause any dirty cache lines in the direct mapping will be safely written back. Move the flush_cache_all() to the second local_flush_cache_tlb() and remove the now redundant first local_flush_cache_tlb(). Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Fix mm initialisation with write buffered write allocate cachesRussell King2005-11-021-1/+8
| | | | | | | | It seems that without the extra tlb flush, we may end up faulting during the early kernel initialisation because the TLB can't see the updated page tables. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3059/1: fix XIP supportNicolas Pitre2005-10-291-11/+19
| | | | | | | | | Patch from Nicolas Pitre Fix XIP support after recent bootmem code refactoring. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] 3016/1: Replace map_desc.physical with map_desc.pfnDeepak Saxena2005-10-281-6/+6
| | | | | | | | | | | Patch from Deepak Saxena Convert map_desc.physical to map_desc.pfn. This allows us to add support for 36-bit addressed physical devices in the static maps without having to resort to u64 variables. Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] Re-jig bootmem initialisationRussell King2005-10-281-241/+239
| | | | | | | | Make ARM independent of the way bootmem operates internally. We now map each node as we initialise it, and place the bootmem bitmap inside each node, rather than all in the first node. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM SMP: Use local_flush_tlb* where we really want to be localRussell King2005-06-281-1/+1
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: Move memmap freeing into init.cRussell King2005-06-271-6/+65
| | | | | | | It doesn't make sense for this to be in mm-armv.c now that 26-bit ARM support is no longer integrated into arch/arm. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] ARM: Remove explicit page-alignments in memory initRussell King2005-06-221-13/+6
| | | | | | | | Since meminfo.bank[] array contains page-aligned start/size, we no longer need to explicitly round up/down the addresses when converting to PFNs. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] arm: add comment about max_low_pfn/max_pfnakpm@osdl.org2005-04-161-0/+3
| | | | | | | | | | | | | | | ) From: Russell King <rmk+lkml@arm.linux.org.uk> Oddly, max_low_pfn/max_pfn end up being the number of pages in the system, rather than the maximum PFN on ARM. This doesn't seem to cause any problems, so just add a note about it. Signed-off-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+621
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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