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2008-04-17[POWERPC] Introduce lowmem_end_addr to distinguish from total_lowmemKumar Gala
total_lowmem represents the amount of low memory, not the physical address that low memory ends at. If the start of memory is at 0 it happens that total_lowmem can be used as both the size and the address that lowmem ends at (or more specifically one byte beyond the end). To make the code a bit more clear and deal with the case when the start of memory isn't at physical 0, we introduce lowmem_end_addr that represents one byte beyond the last physical address in the lowmem region. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-01[POWERPC] Remove redundant display of free swap space in show_mem()Johannes Weiner
show_mem() has no need to print the amount of free swap space manually because show_free_areas() does this already and is called by the former. The two outputs only differ in text formatting: printk("Free swap = %lukB\n", ...); printk("Free swap: %6ldkB\n", ...); Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-01[POWERPC] arch_add_memory() cannot be __devinitGeert Uytterhoeven
WARNING: vmlinux.o(.text+0xb41b0): Section mismatch in reference from the function .add_memory() to the function .devinit.text:.arch_add_memory() The function .add_memory() references the function __devinit .arch_add_memory(). This is often because .add_memory lacks a __devinit annotation or the annotation of .arch_add_memory is wrong. arch_add_memory() is also not __devinit on other architectures Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-13[LIB]: Make PowerPC LMB code generic so sparc64 can use it too.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-08[POWERPC] Add arch-specific walk_memory_remove() for 64-bit powerpcBadari Pulavarty
walk_memory_resource() verifies if there are holes in a given memory range, by checking against /proc/iomem. On x86/ia64 system memory is represented in /proc/iomem. On powerpc, we don't show system memory as IO resource in /proc/iomem - instead it's maintained in /proc/device-tree. This provides a way for an architecture to provide its own walk_memory_resource() function. On powerpc, the memory region is small (16MB), contiguous and non-overlapping. So extra checking against the device-tree is not needed. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-08[POWERPC] Add remove_memory() for 64-bit powerpcBadari Pulavarty
Supply remove_memory() function for 64-bit powerpc. This is still not quite complete as it needs to do some more arch-specific stuff, which will be added in a later patch. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-07Merge branch 'for-2.6.25' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (69 commits) [POWERPC] Add SPE registers to core dumps [POWERPC] Use regset code for compat PTRACE_*REGS* calls [POWERPC] Use generic compat_sys_ptrace [POWERPC] Use generic compat_ptrace_request [POWERPC] Use generic ptrace peekdata/pokedata [POWERPC] Use regset code for PTRACE_*REGS* requests [POWERPC] Switch to generic compat_binfmt_elf code [POWERPC] Switch to using user_regset-based core dumps [POWERPC] Add user_regset compat support [POWERPC] Add user_regset_view definitions [POWERPC] Use user_regset accessors for GPRs [POWERPC] ptrace accessors for special regs MSR and TRAP [POWERPC] Use user_regset accessors for SPE regs [POWERPC] Use user_regset accessors for altivec regs [POWERPC] Use user_regset accessors for FP regs [POWERPC] mpc52xx: fix compile error introduce when rebasing patch [POWERPC] 4xx: PCIe indirect DCR spinlock fix. [POWERPC] Add missing native dcr dcr_ind_lock spinlock [POWERPC] 4xx: Fix offset value on Warp board [POWERPC] 4xx: Add 440EPx Sequoia ehci dts entry ...
2008-02-07Introduce flags for reserve_bootmem()Bernhard Walle
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>
2008-02-06[POWERPC] update_mmu_cache: Don't cache-flush non-readable pagesScott Wood
Currently, update_mmu_cache will crash if given a no-access PTE. There's no need to synchronize dcache/icache unless it's an exec mapping -- however, due to the existence of older glibc versions that execute out of a read-but-no-exec page, readability is tested instead. This assumes no exec-only mappings; if such mappings become supported, they will need to go through the kmap_atomic() version of dcache/icache synchronization. This fixes a bug reported by some users where the kernel would crash while dumping core on a threaded program. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-01-23[POWERPC] Fix handling of memreserve if the range lands in highmemKumar Gala
There were several issues if a memreserve range existed and happened to be in highmem: * The bootmem allocator is only aware of lowmem so calling reserve_bootmem with a highmem address would cause a BUG_ON * All highmem pages were provided to the buddy allocator Added a lmb_is_reserved() api that we now use to determine if a highem page should continue to be PageReserved or provided to the buddy allocator. Also, we incorrectly reported the amount of pages reserved since all highmem pages are initally marked reserved and we clear the PageReserved flag as we "free" up the highmem pages. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] Fix 8xx build breakage due to _tlbie changesBenjamin Herrenschmidt
My changes to _tlbie to fix 4xx unfortunately broke 8xx build in a couple of places. This fixes it. Spotted by Olof Johansson. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-10-16fix memory hot remove not configured case.KAMEZAWA Hiroyuki
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>
2007-08-17[POWERPC] Clean out a bunch of duplicate includesJesper Juhl
This removes several duplicate includes from arch/powerpc/. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-07-10[POWERPC] Remove extra return statementManish Ahuja
Found 2 instances of return one right after each other in arch_add_memory(). This removes the superfluous one. Signed-off-by: Manish Ahuja <mahuja@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-14[POWERPC] Remove the dregs of APUS support from arch/powerpcDavid Gibson
APUS (the Amiga Power-Up System) is not supported under arch/powerpc and it's unlikely it ever will be. Therefore, this patch removes the fragments of APUS support code from arch/powerpc which have been copied from arch/ppc. A few APUS references are left in asm-powerpc in .h files which are still used from arch/ppc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-22[POWERPC] Fix warning in 32-bit builds with CONFIG_HIGHMEMBenjamin Herrenschmidt
Some missing fixup for the removal of 4 level fixup header. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-09[POWERPC] Mark pages that don't exist as nosaveJohannes Berg
On some powerpc architectures (notably 64-bit powermac) there is a memory hole, for example on powermacs between 2G and 4G. Since we use the flat memory model regardless, these pages must be marked as nosave (for suspend to disk.) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-02[POWERPC] Remove unneeded page_is_ram exportJohannes Berg
arch/powerpc/mm/mem.c exports page_is_ram, which is not used anywhere that could be modular. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-13[POWERPC] Fix 32-bit mm operations when not using BATsBenjamin Herrenschmidt
On hash table based 32 bits powerpc's, the hash management code runs with a big spinlock. It's thus important that it never causes itself a hash fault. That code is generally safe (it does memory accesses in real mode among other things) with the exception of the actual access to the code itself. That is, the kernel text needs to be accessible without taking a hash miss exceptions. This is currently guaranteed by having a BAT register mapping part of the linear mapping permanently, which includes the kernel text. But this is not true if using the "nobats" kernel command line option (which can be useful for debugging) and will not be true when using DEBUG_PAGEALLOC implemented in a subsequent patch. This patch fixes this by pre-faulting in the hash table pages that hit the kernel text, and making sure we never evict such a page under hash pressure. Signed-off-by: Benjamin Herrenchmidt <benh@kernel.crashing.org> arch/powerpc/mm/hash_low_32.S | 22 ++++++++++++++++++++-- arch/powerpc/mm/mem.c | 3 --- arch/powerpc/mm/mmu_decl.h | 4 ++++ arch/powerpc/mm/pgtable_32.c | 11 +++++++---- 4 files changed, 31 insertions(+), 9 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-02-13[POWERPC] Fix vDSO page count calculationBenjamin Herrenschmidt
The recent vDSO consolidation patches broke powerpc due to a mistake in the definition of MAXPAGES constants. This fixes it by moving to a dynamically allocated array of pages instead as I don't like much hard coded size limits. Also move the vdso initialisation to an initcall since it doesn't really need to be done -that- early. Applogies for not catching the breakage earlier, Roland _did_ CC me on his patches a while ago, I got busy with other things and forgot to test them. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-02-08[POWERPC] Remove bogus comment about page_is_ramJohannes Berg
arch/powerpc/mm/mem.c states that page_is_ram is called by the code that implements /dev/mem, which isn't true. Remove the comment. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-02-07[POWERPC] 8xx: platform specific mmu updatesVitaly Bordug
This is just a straight port of the same done in arch/ppc by Marcelo Tosatti. One used to be [PATCH] ppc32 8xx: update_mmu_cache() needs unconditional tlbie, commit eb07d964b4491d1bb5864cd3d7e7633ccdda9a53 In a nutshell, the board is nearly stuck without this, yet without any visible failure - being just very slow. Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-11[PATCH] mm: use symbolic names instead of indices for zone initialisationMel Gorman
Arch-independent zone-sizing is using indices instead of symbolic names to offset within an array related to zones (max_zone_pfns). The unintended impact is that ZONE_DMA and ZONE_NORMAL is initialised on powerpc instead of ZONE_DMA and ZONE_HIGHMEM when CONFIG_HIGHMEM is set. As a result, the the machine fails to boot but will boot with CONFIG_HIGHMEM turned off. The following patch properly initialises the max_zone_pfns[] array and uses symbolic names instead of indices in each architecture using arch-independent zone-sizing. Two users have successfully booted their powerpcs with it (one an ibook G4). It has also been boot tested on x86, x86_64, ppc64 and ia64. Please merge for 2.6.19-rc2. Credit to Benjamin Herrenschmidt for identifying the bug and rolling the first fix. Additional credit to Johannes Berg and Andreas Schwab for reporting the problem and testing on powerpc. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-27[PATCH] Have Power use add_active_range() and free_area_init_nodes()Mel Gorman
Size zones and holes in an architecture independent manner for Power. [judith@osdl.org: build fix] Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Andi Kleen <ak@muc.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Keith Mannthey" <kmannth@gmail.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-27[PATCH] pgdat allocation for new node add (specify node id)Yasunori Goto
Change the name of old add_memory() to arch_add_memory. And use node id to get pgdat for the node at NODE_DATA(). Note: Powerpc's old add_memory() is defined as __devinit. However, add_memory() is usually called only after bootup. I suppose it may be redundant. But, I'm not well known about powerpc. So, I keep it. (But, __meminit is better at least.) Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-22[PATCH] powerpc: Less verbose mem configuration outputOlof Johansson
Quieten some of the debug ram config output. we already print out available memory at KERN_INFO level. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-29Merge ../linux-2.6Paul Mackerras
2006-03-27[PATCH] for_each_online_pgdat: renaming for_each_pgdatKAMEZAWA Hiroyuki
Replace for_each_pgdat() with for_each_online_pgdat(). Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-27[PATCH] powerpc: Consistent printing of node idAnton Blanchard
We were printing node ids in hex in one spot. Lets be consistent and always print them in decimal. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (78 commits) [PATCH] powerpc: Add FSL SEC node to documentation [PATCH] macintosh: tidy-up driver_register() return values [PATCH] powerpc: tidy-up of_register_driver()/driver_register() return values [PATCH] powerpc: via-pmu warning fix [PATCH] macintosh: cleanup the use of i2c headers [PATCH] powerpc: dont allow old RTC to be selected [PATCH] powerpc: make powerbook_sleep_grackle static [PATCH] powerpc: Fix warning in add_memory [PATCH] powerpc: update mailing list addresses [PATCH] powerpc: Remove calculation of io hole [PATCH] powerpc: iseries: Add bootargs to /chosen [PATCH] powerpc: iseries: Add /system-id, /model and /compatible [PATCH] powerpc: Add strne2a() to convert a string from EBCDIC to ASCII [PATCH] powerpc: iseries: Make more stuff static in platforms/iseries/mf.c [PATCH] powerpc: iseries: Remove pointless iSeries_(restart|power_off|halt) [PATCH] powerpc: iseries: mf related cleanups [PATCH] powerpc: Replace platform_is_lpar() with a firmware feature [PATCH] powerpc: trivial: Cleanup whitespace in cputable.h [PATCH] powerpc: Remove unused iommu_off logic from pSeries_init_early() [PATCH] powerpc: Unconfuse htab_bolt_mapping() callers ...
2006-03-23[PATCH] powerpc: Fix warning in add_memoryAndrew Morton
arch/powerpc/mm/mem.c: In function `add_memory': arch/powerpc/mm/mem.c:128: warning: assignment makes integer from pointer without a cast Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22[PATCH] remove set_page_count() outside mm/Nick Piggin
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>
2006-03-22[PATCH] remove set_page_count(page, 0) users (outside mm)Nick Piggin
A couple of places set_page_count(page, 1) that don't need to. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-07[PATCH] powerpc: Always panic if lmb_alloc() failsMichael Ellerman
Currently most callers of lmb_alloc() don't check if it worked or not, if it ever does weird bad things will probably happen. The few callers who do check just panic or BUG_ON. So make lmb_alloc() panic internally, to catch bugs at the source. The few callers who did check the result no longer need to. The only caller that did anything interesting with the return result was careful_allocation(). For it we create __lmb_alloc_base() which _doesn't_ panic automatically, a little messy, but passable. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-02-07[PATCH] powerpc: Cleanup, consolidating icache dirtying logicDavid Gibson
The code to mark a page as icache dirty (so that it will later be icache-dcache flushed when we try to execute from it) is duplicated in three places: flush_dcache_page() does this marking and nothing else, but clear_user_page() and copy_user_page() duplicate it, since those functions make the page icache dirty themselves. This patch makes those other functions call flush_dcache_page() instead, so the logic's all in one place. This will make life less confusing if we ever need to tweak the details of the the lazy icache flush mechanism. arch/powerpc/mm/mem.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: Don't use KERNELBASE in add_memory()Michael Ellerman
In add_memory() we should be using __va() to get a virtual address. Spotted by Mike Kravetz. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: numa placement for dynamically added memoryMike Kravetz
This places dynamically added memory within the appropriate numa node. A new routine hot_add_scn_to_nid() replicates most of the memory scanning code in parse_numa_properties(). Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-23[PATCH] mm: powerpc ptlock commentsHugh Dickins
Update comments (only) on page_table_lock and mmap_sem in arch/powerpc. Removed the comment on page_table_lock from hash_huge_page: since it's no longer taking page_table_lock itself, it's irrelevant whether others are; but how it is safe (even against huge file truncation?) I can't say. Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-15[PATCH] powerpc: Fix sparsemem with memory holes [was Re: ppc64 oops..]Paul Mackerras
This patch should fix the crashes we have been seeing on 64-bit powerpc systems with a memory hole when sparsemem is enabled. I'd appreciate it if people who know more about NUMA and sparsemem than me could look over it. There were two bugs. The first was that if NUMA was enabled but there was no NUMA information for the machine, the setup_nonnuma() function was adding a single region, assuming memory was contiguous. The second was that the loops in mem_init() and show_mem() assumed that all pages within the span of a pgdat were valid (had a valid struct page). I also fixed the incorrect setting of num_physpages that Mike Kravetz pointed out. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-11[PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernelBenjamin Herrenschmidt
This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08[PATCH] Memory Add Fixes for ppc64Mike Kravetz
memmap_init_zone() sets page count to 1. Before 'freeing' the page, we need to clear the count. This is the same that is done on free_all_bootmem_core() for memory discovered at boot time. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08[PATCH] revised Memory Add Fixes for ppc64Mike Kravetz
Add the create_section_mapping() routine to create hptes for memory sections dynamically added after system boot. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08[PATCH] ppc64: fix Memory: summary lineAnton Blanchard
On ppc64 we end up with a negative value for the data size in the memory boot message: Memory: 2035560k/2097152k available (5792k kernel code, 89564k reserved, 18014398509481632k data, 870k bss, 352k init) It turns out the section ordering of the linker script is different on ppc32 and ppc64, so just count data as _edata - _sdata which should work on both. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-06[PATCH] ppc64: support 64k pagesBenjamin Herrenschmidt
Adds a new CONFIG_PPC_64K_PAGES which, when enabled, changes the kernel base page size to 64K. The resulting kernel still boots on any hardware. On current machines with 4K pages support only, the kernel will maintain 16 "subpages" for each 64K page transparently. Note that while real 64K capable HW has been tested, the current patch will not enable it yet as such hardware is not released yet, and I'm still verifying with the firmware architects the proper to get the information from the newer hypervisors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-31Merge ../linux-2.6 by handPaul Mackerras
2005-10-31powerpc: Fix bug arising from having multiple memory_limit variablesPaul Mackerras
We had a static memory_limit in prom.c, and then another one defined in setup_64.c and used in numa.c, which resulted in the kernel crashing when mem=xxx was given on the command line. This puts the declaration in system.h and the definition in mem.c. This also moves the definition of tce_alloc_start/end out of setup_64.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-29[PATCH] ppc: make phys_mem_access_prot() work with pfns instead of addressesRoland Dreier
Change the phys_mem_access_prot() function to take a pfn instead of an address. This allows mmap64() to work on /dev/mem for addresses above 4G on 32-bit architectures. We start with a pfn in mmap_mem(), so there's no need to convert to an address; in fact, it's actively bad, since the conversion can overflow when the address is above 4G. Similarly fix the ppc32 page_is_ram() function to avoid a conversion to an address by directly comparing to max_pfn. Working with max_pfn instead of high_memory fixes page_is_ram() to give the right answer for highmem pages. Signed-off-by: Roland Dreier <rolandd@cisco.com> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-27[PATCH] powerpc: Purge bootinfo.hDavid Gibson
With ARCH=powerpc we assume the presence of a device tree, so we don't require any support for the old bi_recs method of passing boot parameters. Likewise, we've never needed it for ppc64, but we still had an include/asm-ppc64/bootinfo.h from which nothing was used. This patch removes that file, and all references to it in arch/ppc64 and arch/powerpc. A related, unused variable 'boot_mem_size' is also removed from setup_32.c. The bootinfo stuff remains in ARCH=ppc for the time being. Built and booted on Power5 (ARCH=ppc64 and ARCH=powerpc), built for 32-bit powermac (ARCH=powerpc and ARCH=ppc). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-10-22Merge changes from linux-2.6 by handPaul Mackerras