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* | sparc32: Implement hard_smp_processor_id() via instruction patching.David S. Miller2012-05-14
| | | | | | | | | | | | | | | | | | | | | | This is the last non-trivial user of btfixup. Like sparc64, use a special patch section to resolve the various implementations of how to read the current CPU's ID when we don't have current_thread_info()->cpu necessarily available. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Sam Ravnborg <sam@ravnborg.org>
* | sparc32: Move cache and TLB flushes over to method ops.David S. Miller2012-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This eliminated most of the remaining users of btfixup. There are some complications because of the special cases we have for sun4d, leon, and some flavors of viking. It was found that there are no cases where a flush_page_for_dma method was not hooked up to something, so the "noflush" iommu methods were removed. Add some documentation to the viking_sun4d_smp_ops to describe exactly the hardware bug which causes us to need special TLB flushing on sun4d. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Convert mmu_* interfaces from btfixup to method ops.David S. Miller2012-05-13
| | | | | | | | | | | | | | | | | | | | | | | | This set of changes displays one major danger of btfixup, interface signatures are not always type checked fully. As seen here the iounit variant of the map_dma_area routine had an incorrect type for one of it's arguments. It turns out to be harmless in this case, but just imagine trying to debug something involving this kind of problem. No thanks. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc: Kill mmu_{un,}lockarea().David S. Miller2012-05-13
| | | | | | | | | | | | | | | | | | | | | | | | These were used on sun4c during floppy data transfers since on that chip we had to lock the cpu mappings into the TLB because we cannot take a TLB miss during the assembler floppy interrupt handler that does the data transfer. That is no longer necessary since we've removed sun4c support, thus this stuff can disappear completely. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup update_mmu_cache().David S. Miller2012-05-13
| | | | | | | | | | | | | | | | | | | | | | The magic Swift SRMMU code in question has not been enabled for something on the order of a decade, and it as well as it's comment is there in the history in case we ever need it again. Therefore all implementations are NOPs and we can kill this stuff off. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Kill btfixup for xchg()'s 'swap' instruction.David S. Miller2012-05-13
| | | | | | | | | | | | | | | | | | | | We always have this instruction available, so no need to use btfixup for it any more. This also eradicates the whole of atomic_32.S and thus the __atomic_begin and __atomic_end symbols completely. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup in page_32.hSam Ravnborg2012-05-13
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop unused prototype from timer_32.hSam Ravnborg2012-05-13
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup in mmu_context_32.hSam Ravnborg2012-05-13
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup in pgtable_32.hSam Ravnborg2012-05-13
| | | | | | | | | | | | | | Only one function left using btfixup. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup in pgalloc_32.hSam Ravnborg2012-05-13
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup more PTE constants and PTE ops.David S. Miller2012-05-12
| | | | | | | | | | | | | | pte_{filei,wrprotecti,mkcleani,mkoldi} pte_{mkwrite,mkdirty,mkyoung} Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup pte_{write,dirty,young}iDavid S. Miller2012-05-12
| | | | | | | | | | | | | | | | And we can certainly get rid of the const function attributes, there is no way that's needed any longer and no other arch uses this kind of annotation here. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup set_pte, pte_present, mk_pte{_phys,_io}().David S. Miller2012-05-12
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup pmd_{bad,present}().David S. Miller2012-05-12
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup pgd_{none,bad,present}.David S. Miller2012-05-12
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup PAGE_{NONE,COPY,READONLY,SHARED,KERNEL}.David S. Miller2012-05-12
| | | | | | | | | | | | | | | | | | That lets us also get rid of the run-time initialization of protection_map[] and all the ugly module workarounds for PAGE_KERNEL and PAGE_SHARED to deal with the fact that we can't do btfixups for modular code. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup pmd_page and pte_pfn.David S. Miller2012-05-12
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup {pte,pmd,pgd}_clear().David S. Miller2012-05-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also we can remove BTFIXUPCALL_SWAPO0G0 as that is no longer used. This was rather amusing, we were setting the btfixup vectors based upon cpu type but all to the same exact generic srmmu routines. Furthermore, we were inconsistently marking the fixup as either BTFIXUPCALL_SWAPO0G0 or BTFIXUPCALL_NORM. What a mess, glad we could untangle this stuff. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Un-btfixup PGDIR_{SHIFT,SIZE,MASK} {USER_,}PTRS_PER_{PGD,PMD}David S. Miller2012-05-12
| | | | | | | | | | | | Only one set of values exist, the SRMMU ones. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop unused type/externSam Ravnborg2012-05-12
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup for check_pgt_cacheSam Ravnborg2012-05-12
| | | | | | | | | | | | | | | | | | It is a noop for srmmu - so use a define as sparc64 does. And drop all sparc callers - no need to confuse our-self be calling a noop function. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup for switch_mmSam Ravnborg2012-05-12
| | | | | | | | | | | | | | | | | | This revealed that the implementation of switch_mm had a bogus extra argument. No harm as said argument was never used - but confusing. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: code cleanup in floppy glueSam Ravnborg2012-05-12
| | | | | | | | | | | | | | | | | | Small cleanup to improve readability. Dropped one test for sparc_cpu_model - we already know that only sun4m support floppy. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: fix warning in floopy glueSam Ravnborg2012-05-12
| | | | | | | | | | | | | | | | | | | | | | Fix following warning: arch/sparc/include/asm/floppy_32.h:342:5: warning: 'op' may be used uninitialized in this function The warning are legitimite and we can end up using op uninitialized. This fixes build with my gcc on UP. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Trivial removal of sun4c references in comments.David S. Miller2012-05-12
| | | | | | | | | | | | | | | | I left some around, like the ones in the openprom headers, since we need to think about which pieces of those datastructures and code we can completely toss now. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Remove sun4 and sun4c from enum sparc_cpu.David S. Miller2012-05-12
| | | | | | | | | | | | | | | | | | All the remaining references are trivially removed since we've just eliminated the final reference to sparc_cpu_model from assembler code in commit b7d96ce189564e661909fbf8df39d7358149885b ("sparc32: Remove sparc_cpu_model read from floppy interrupt handler.") Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Kill unused defines from asm/head_32.hDavid S. Miller2012-05-12
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Remove some more sun4c code from floppy glue.David S. Miller2012-05-12
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Remove ldXa and stXa defines, unused.David S. Miller2012-05-12
| | | | | | | | | | | | These were for sharing some MMU code between sun4 and sun4c. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Remove sun4{,c} control reg definitions from contregs.h.David S. Miller2012-05-12
| | | | | | | | | | | | No longer used. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Kill asm/vac-ops.hDavid S. Miller2012-05-12
| | | | | | | | | | | | All sun4/sun4c stuff and unused. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Put back SPARC_BRANCH.David S. Miller2012-05-11
| | | | | | | | | | | | It's needed for the floppy interrupt trap table patching. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Kill SUN4C_LOCK_{VADDR,END} and associated comment.David S. Miller2012-05-11
| | | | | | | | | | | | No longer used. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc: Clear out unused asm/machines.h values.David S. Miller2012-05-11
| | | | | | | | | | | | | | | | | | | | | | | | Remove sun4 and sun4c machine ID values from asm/machines.h Also kill NUM_SUN_MACHINES, use ARRAY_SIZE instead. Kill asm/machines.h include and sun4c checks from asm/floppy_32.h Remove asm/machines.h include from setup_32.c and time_32.c, unused. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: Remove inline strncmp "optimization" for constant counts.David S. Miller2012-05-11
| | | | | | | | | | | | Let the compiler do stuff like this. Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: use inline versions of pgprot_noncached, pte_to_pgoff and pgoff_to_pteSam Ravnborg2012-05-11
| | | | | | | | | | | | | | | | We no longer have different versions of these so use a few simple static inline functions. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop btfixup for alloc_thread_info_node/free_thread_infoSam Ravnborg2012-05-11
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop sun4c user stack checking routineSam Ravnborg2012-05-11
| | | | | | | | | | | | | | | | With this we no longer do any run-time patchings of traps. So drop the function + macro to support this. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: delete pgtsun4c.hSam Ravnborg2012-05-11
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: remove all uses of ARCH_SUN4CSam Ravnborg2012-05-11
| | | | | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: remove sun4c trapsSam Ravnborg2012-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | We used to runtime patch the trap table for srmmu. With the removal of sun4c support this is no longer required. With the sun4c trap removed we can remove all the referenced trap handling which is sun4c specific. This also allows us to get rid of the nosun4c.c file that contained only dummy functions/data. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: drop sun4c supportSam Ravnborg2012-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Machines with sun4c support are very rare these days, and noone is using them for any practical purposes. The sun4c support has been know broken for quite some time too. So rather than trying to keep it up-to-date, lets get rid of it. This allows us to do some very welcome cleanup of sparc32 support. Updated the former sun4c specifc nmi (which was also used for sun4m UP) to be a generic UP NMI. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: generic clockevent supportTkhai Kirill2012-04-15
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel uses l14 timers as clockevents. l10 timer is used as clocksource if platform master_l10_counter isn't constantly zero. The clocksource is continuous, so it's possible to use high resolution timers. l10 timer is also used as clockevent on UP configurations. This realization is for sun4m, sun4d, sun4c, microsparc-IIep and LEON platforms. The appropriate LEON changes was made by Konrad Eisele. In case of sun4m's oneshot mode, profile irq is zeroed in smp4m_percpu_timer_interrupt(). It is maybe needless (double, triple etc overflow does nothing). sun4d is able to have oneshot mode too, but I haven't any way to test it. So code of its percpu timer handler is made as much equal to the current code as possible. The patch is tested on sun4m box in SMP mode by me, and tested by Konrad on leon in up mode (leon smp is broken atm - due to other reasons). Signed-off-by: Tkhai Kirill <tkhai@yandex.ru> Tested-by: Konrad Eisele <konrad@gaisler.com> [leon up] [sam: revised patch to provide generic support for leon] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'for-linus' of ↵Linus Torvalds2012-04-04
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/mszyprowski/linux-dma-mapping Pull DMA mapping branch from Marek Szyprowski: "Short summary for the whole series: A few limitations have been identified in the current dma-mapping design and its implementations for various architectures. There exist more than one function for allocating and freeing the buffers: currently these 3 are used dma_{alloc, free}_coherent, dma_{alloc,free}_writecombine, dma_{alloc,free}_noncoherent. For most of the systems these calls are almost equivalent and can be interchanged. For others, especially the truly non-coherent ones (like ARM), the difference can be easily noticed in overall driver performance. Sadly not all architectures provide implementations for all of them, so the drivers might need to be adapted and cannot be easily shared between different architectures. The provided patches unify all these functions and hide the differences under the already existing dma attributes concept. The thread with more references is available here: http://www.spinics.net/lists/linux-sh/msg09777.html These patches are also a prerequisite for unifying DMA-mapping implementation on ARM architecture with the common one provided by dma_map_ops structure and extending it with IOMMU support. More information is available in the following thread: http://thread.gmane.org/gmane.linux.kernel.cross-arch/12819 More works on dma-mapping framework are planned, especially in the area of buffer sharing and managing the shared mappings (together with the recently introduced dma_buf interface: commit d15bd7ee445d "dma-buf: Introduce dma buffer sharing mechanism"). The patches in the current set introduce a new alloc/free methods (with support for memory attributes) in dma_map_ops structure, which will later replace dma_alloc_coherent and dma_alloc_writecombine functions." People finally started piping up with support for merging this, so I'm merging it as the last of the pending stuff from the merge window. Looks like pohmelfs is going to wait for 3.5 and more external support for merging. * 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: common: DMA-mapping: add NON-CONSISTENT attribute common: DMA-mapping: add WRITE_COMBINE attribute common: dma-mapping: introduce mmap method common: dma-mapping: remove old alloc_coherent and free_coherent methods Hexagon: adapt for dma_map_ops changes Unicore32: adapt for dma_map_ops changes Microblaze: adapt for dma_map_ops changes SH: adapt for dma_map_ops changes Alpha: adapt for dma_map_ops changes SPARC: adapt for dma_map_ops changes PowerPC: adapt for dma_map_ops changes MIPS: adapt for dma_map_ops changes X86 & IA64: adapt for dma_map_ops changes common: dma-mapping: introduce generic alloc() and free() methods
| * SPARC: adapt for dma_map_ops changesAndrzej Pietrasiewicz2012-03-28
| | | | | | | | | | | | | | | | | | | | | | Adapt core SPARC architecture code for dma_map_ops changes: replace alloc/free_coherent with generic alloc/free methods. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: David S. Miller <davem@davemloft.net>
* | sparc: pgtable_64: change include orderAaro Koskinen2012-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the following build breakage in v3.4-rc1: CC arch/sparc/kernel/cpu.o In file included from /home/aaro/git/linux/arch/sparc/include/asm/pgtable_64.h:15:0, from /home/aaro/git/linux/arch/sparc/include/asm/pgtable.h:4, from arch/sparc/kernel/cpu.c:15: include/asm-generic/pgtable-nopud.h:13:16: error: unknown type name 'pgd_t' include/asm-generic/pgtable-nopud.h:25:28: error: unknown type name 'pgd_t' include/asm-generic/pgtable-nopud.h:26:27: error: unknown type name 'pgd_t' include/asm-generic/pgtable-nopud.h:27:31: error: unknown type name 'pgd_t' include/asm-generic/pgtable-nopud.h:28:30: error: unknown type name 'pgd_t' include/asm-generic/pgtable-nopud.h:38:34: error: unknown type name 'pgd_t' In file included from /home/aaro/git/linux/arch/sparc/include/asm/pgtable_64.h:783:0, from /home/aaro/git/linux/arch/sparc/include/asm/pgtable.h:4, from arch/sparc/kernel/cpu.c:15: include/asm-generic/pgtable.h: In function 'pgd_none_or_clear_bad': include/asm-generic/pgtable.h:258:2: error: implicit declaration of function 'pgd_none' [-Werror=implicit-function-declaration] include/asm-generic/pgtable.h:260:2: error: implicit declaration of function 'pgd_bad' [-Werror=implicit-function-declaration] include/asm-generic/pgtable.h: In function 'pud_none_or_clear_bad': include/asm-generic/pgtable.h:269:6: error: request for member 'pgd' in something not a structure or union Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc32: fix fallout from system.h removalSam Ravnborg2012-03-30
| | | | | | | | | | | | | | Build failures for the typical configs I use Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sparc: fix fallout from system.h splitStephen Rothwell2012-03-30
| | | | | | | | | | | | | | | | | | | | Fixes this build error: kernel/signal.c: In function 'ptrace_stop': kernel/signal.c:1860:3: error: implicit declaration of function 'synchronize_user_stack' [-Werror=implicit-function-declaration] Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'x86-x32-for-linus' of ↵Linus Torvalds2012-03-29
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x32 support for x86-64 from Ingo Molnar: "This tree introduces the X32 binary format and execution mode for x86: 32-bit data space binaries using 64-bit instructions and 64-bit kernel syscalls. This allows applications whose working set fits into a 32 bits address space to make use of 64-bit instructions while using a 32-bit address space with shorter pointers, more compressed data structures, etc." Fix up trivial context conflicts in arch/x86/{Kconfig,vdso/vma.c} * 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits) x32: Fix alignment fail in struct compat_siginfo x32: Fix stupid ia32/x32 inversion in the siginfo format x32: Add ptrace for x32 x32: Switch to a 64-bit clock_t x32: Provide separate is_ia32_task() and is_x32_task() predicates x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls x86/x32: Fix the binutils auto-detect x32: Warn and disable rather than error if binutils too old x32: Only clear TIF_X32 flag once x32: Make sure TS_COMPAT is cleared for x32 tasks fs: Remove missed ->fds_bits from cessation use of fd_set structs internally fs: Fix close_on_exec pointer in alloc_fdtable x32: Drop non-__vdso weak symbols from the x32 VDSO x32: Fix coding style violations in the x32 VDSO code x32: Add x32 VDSO support x32: Allow x32 to be configured x32: If configured, add x32 system calls to system call tables x32: Handle process creation x32: Signal-related system calls x86: Add #ifdef CONFIG_COMPAT to <asm/sys_ia32.h> ...
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