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2008-02-14sh: __uncached_start only on sh32.Paul Mundt1-0/+2
sh64 doesn't provide __uncached_start, so don't reference it unconditionally. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-14sh: Get SH-5 caches working again post-unification.Paul Mundt1-610/+411
A number of cleanups to get the SH-5 cache management code in line with the rest of the SH backend. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-14sh: Update SH-5 flush_cache_sigtramp() for API changes.Paul Mundt1-3/+5
Previously this took an explicit range, update this to use the same behaviour as the rest of the SH parts where we simply flush out a line from the start address. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-14sh: trapped io support V2Magnus Damm1-0/+3
The idea is that we want to get rid of the in/out/readb/writeb callbacks from the machvec and replace that with simple inline read and write operations to memory. Fast and simple for most hardware devices (think pci). Some devices require special treatment though - like 16-bit only CF devices - so we need to have some method to hook in callbacks. This patch makes it possible to add a per-device trap generating filter. This way we can get maximum performance of sane hardware - which doesn't need this filter - and crappy hardware works but gets punished by a performance hit. V2 changes things around a bit and replaces io access callbacks with a simple minimum_bus_width value. In the future we can add stride as well. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-14sh: declared coherent memory support V2 fixMagnus Damm1-12/+20
This patch fixes the recently introduced declared coherent memory support. Without this fix a cached memory area is returned by dma_alloc_coherent() - unless dma_declare_coherent_memory() has setup a separate area. This patch makes sure an uncached memory area is returned. With this patch it is now possible to ping through an rtl8139 interface on r2d-plus. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-02-07Introduce flags for reserve_bootmem()Bernhard Walle1-2/+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>
2008-01-28sh: declared coherent memory support V2Magnus Damm1-46/+128
This patch adds declared coherent memory support to the sh architecture. All functions are based on the x86 implementation. Header files are adjusted to use the new functions instead of the former consistent_alloc() code. This version includes the few changes what were included in the fix patch together with modifications based on feedback from Paul. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Correct pte size mismatch for X2 TLB.Paul Mundt1-1/+1
Fixes up a build warning/error in arch/sh/mm/fault_32.c. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Provide a stubbed __set_fixmap() for nommu.Paul Mundt1-0/+4
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Stub in page_table_range_init() on nommu.Paul Mundt1-0/+6
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Populate swapper_pg_dir with fixmap range.Stuart Menefy1-0/+36
This saves us from having to use kmalloc() for the fixmap entries, which is needed early for the uncached fixmap. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Preparation for uncached jumps through PMB.Stuart Menefy6-30/+46
Presently most of the 29-bit physical parts do P1/P2 segmentation with a 1:1 cached/uncached mapping, jumping between the two to control the caching behaviour. This provides the basic infrastructure to maintain this behaviour on 32-bit physical parts that don't map P1/P2 at all, using a shiny new linker section and corresponding fixmap entry. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Fix compile error of arch/sh/mm/pmb.cNobuhiro Iwamatsu1-1/+1
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: comment tidying for sh64->sh migration.Paul Mundt3-25/+22
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Invalidate the TLB after applying PMB mappings.Stuart Menefy1-0/+6
Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: clear/copy_page renames in lib and lib64.Paul Mundt3-542/+1
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Rename the _32 and _64 TLB flush variants.Paul Mundt4-2/+2
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Copy over special CFLAGS for SH-5 TLB miss.Paul Mundt1-0/+25
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Move over SH-5 TLB and cache support code.Paul Mundt3-2/+1203
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Kill off a stray proc tlb reference in fault_64.Paul Mundt1-4/+0
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Bump the MEMORY_SIZE default to something reasonable.Paul Mundt1-2/+2
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Switch SH-5 to use CONFIG_PAGE_OFFSET.Paul Mundt1-1/+2
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Move in the SH-5 TLB miss.Paul Mundt4-2/+281
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Tidy up various clear_page()/copy_page() definitions.Paul Mundt3-20/+5
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: ioremap_64 needs after_bootmem.Paul Mundt1-0/+3
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Split out tlb-flush in to _32 and _64 variants.Paul Mundt4-2/+477
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Split out pgtable.h in to _32 and _64 variants.Paul Mundt1-12/+28
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: ioremap_64 needs proc_fs.h.Paul Mundt1-0/+1
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Split out ioremap in to _32 and _64 variants.Paul Mundt4-1/+393
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Fix up 64kB page size selection on SH-5.Paul Mundt1-2/+2
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Split out extable.c _32 and _64 variants.Paul Mundt5-36/+132
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Add SH-5 support to the consistent DMA impl.Paul Mundt1-18/+28
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Split out 29-bit and 32-bit physical mode definitions.Paul Mundt2-1/+12
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Switch Kconfig.sh64 to use arch/sh/mm/Kconfig.Paul Mundt1-3/+7
Consolidates the HUGETLB definitions and others. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Move CPU subtypes to Kconfig.sh.Paul Mundt1-190/+0
We intend to share the mm options, so move the SH-only subtypes up a level. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19sh: lockless UTLB miss fast-path.Paul Mundt1-18/+7
With the refactored update_mmu_cache() introduced in older kernels, there's no longer any need to take the page_table_lock in this path, so simply drop it completely. Without this, performance degradation is seen on SMP on heavily threaded workloads that don't use the split ptlock, and ultimately we have no reason to contend for the lock in the first place. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-19sh: Kill off UTLB flush in fast-path.Paul Mundt1-8/+0
The __do_page_fault() fast-path contains a UTLB flush in order to force an ITLB reload, this isn't needed in practice as the ITLB is auto-reloaded from the UTLB anyways, which is already displaced by the manual 'ldtlb' in the update_mmu_cache() path. This provides a measurable speed up in the TLB miss fast-path. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-07sh: Kill off __{copy,clear}_user_page().Paul Mundt2-106/+0
Now that copy_to_user_page()/copy_from_user_page() are wired up, we can drop the old __copy_xxx() implementations. Now that the page colouring scheme has changed via kmap_coherent(), we can avoid the flush in these specific helpers. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-07sh: Optimized copy_{to,from}_user_page() for SH-4.Paul Mundt1-23/+29
This moves copy_{to,from}_user_page() out-of-line on SH-4 and converts for the kmap_coherent() API. Based on the MIPS implementation. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-07sh: Wire up clear_user_highpage().Paul Mundt1-0/+23
With the kmap_coherent() API in place, this is trivial to implement, and lets us avoid the cache flush in certain cases. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-07sh: Kill off the remaining ST40 cruft.Paul Mundt1-20/+1
The ST40 stuff in-tree hasn't built for some time, and hasn't been updated for over 3 years. ST maintains their own out-of-tree changes and rebases occasionally, and that's ultimately where all of the ST40 users go anyways. In order for the ST40 code to be brought up to date most of the stuff removed in this changeset would have to be rewritten anyways, so there's very little benefit in keeping the remnants around either. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-07sh: Add -Werror for clean directories.Paul Mundt1-0/+2
Follow the MIPS and sparc64 changes for -Werror instrumentation. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-11-02sh: Fix optimized __copy_user() movca.l usage.Stuart Menefy1-0/+4
movca.l is restricted to SH-4 and up only, though compilers that are unable to support ISA tuning (especially older versions of binutils) will happily compile in the bogus opcode on older parts. Conditionalize it to fix SH-3 regressions noted by Kristoffer. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-10-19pid namespaces: define is_global_init() and is_container_init()Serge E. Hallyn1-1/+1
is_init() is an ambiguous name for the pid==1 check. Split it into is_global_init() and is_container_init(). A cgroup init has it's tsk->pid == 1. A global init also has it's tsk->pid == 1 and it's active pid namespace is the init_pid_ns. But rather than check the active pid namespace, compare the task structure with 'init_pid_ns.child_reaper', which is initialized during boot to the /sbin/init process and never changes. Changelog: 2.6.22-rc4-mm2-pidns1: - Use 'init_pid_ns.child_reaper' to determine if a given task is the global init (/sbin/init) process. This would improve performance and remove dependence on the task_pid(). 2.6.21-mm2-pidns2: - [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc, ppc,avr32}/traps.c for the _exception() call to is_global_init(). This way, we kill only the cgroup if the cgroup's init has a bug rather than force a kernel panic. [akpm@linux-foundation.org: fix comment] [sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c] [bunk@stusta.de: kernel/pid.c: remove unused exports] [sukadev@us.ibm.com: Fix capability.c to work with threaded init] Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com> Acked-by: Pavel Emelianov <xemul@openvz.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Herbert Poetzel <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17Remove dma_cache_(wback|inv|wback_inv) functionsRalf Baechle1-4/+4
dma_cache_(wback|inv|wback_inv) were the earliest attempt on a generalized cache managment API for I/O purposes. Originally it was basically the raw MIPS low level cache API exported to the entire world. The API has suffered from a lack of documentation, was not very widely used unlike it's more modern brothers and can easily be replaced by dma_cache_sync. So remove it rsp. turn the surviving bits back into an arch private API, as discussed on linux-arch. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17Slab API: remove useless ctor parameter and reorder parametersChristoph Lameter1-2/+1
Slab constructors currently have a flags parameter that is never used. And the order of the arguments is opposite to other slab functions. The object pointer is placed before the kmem_cache pointer. Convert ctor(void *object, struct kmem_cache *s, unsigned long flags) to ctor(struct kmem_cache *s, void *object) throughout the kernel [akpm@linux-foundation.org: coupla fixes] Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16fix memory hot remove not configured case.KAMEZAWA Hiroyuki1-6/+0
Now, arch dependent code around CONFIG_MEMORY_HOTREMOVE is a mess. This patch cleans up them. This is against 2.6.23-rc6-mm1. - fix compile failure on ia64/ CONFIG_MEMORY_HOTPLUG && !CONFIG_MEMORY_HOTREMOVE case. - For !CONFIG_MEMORY_HOTREMOVE, add generic no-op remove_memory(), which returns -EINVAL. - removed remove_pages() only used in powerpc. - removed no-op remove_memory() in i386, sh, sparc64, x86_64. - only powerpc returns -ENOSYS at memory hot remove(no-op). changes it to return -EINVAL. Note: Currently, only ia64 supports CONFIG_MEMORY_HOTREMOVE. I welcome other archs if there are requirements and testers. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16During VM oom condition, kill all threads in process groupWill Schmidt1-1/+1
We have had complaints where a threaded application is left in a bad state after one of it's threads is killed when we hit a VM: out_of_memory condition. Killing just one of the process threads can leave the application in a bad state, whereas killing the entire process group would allow for the application to restart, or be otherwise handled, and makes it very obvious that something has gone wrong. This change allows the entire process group to be taken down, rather than just the one thread. Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-28sh: __copy_user() optimizations for small copies.Stuart Menefy1-61/+108
This implements a fast-path for small (less than 12 bytes) copies, with the existing path treated as the slow-path and left as the default behaviour for all other copy sizes. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-09-27sh: Support extended mode TLB on SH-X3.Paul Mundt1-1/+1
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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