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* xtensa: remove platform rtc hooksJohannes Weiner2009-04-03
| | | | | | | | | | | | | | platform_get/set_rtc_time() is not implemented by any of the supported xtensa platforms. Remove the facility completely. The initial seconds for xtime come from read_persistent_clock() which returns just 0 in the generic implementation. Platforms that sport a persistent clock can implement this function. This is needed to implement the ccount as a clock source. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: use generic sched_clock()Johannes Weiner2009-04-03
| | | | | | | | | Current xtensa implementation of sched_clock() is the same as the generic one. Just remove it, the weak symbol in kernel/sched_clock.c will be used instead. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: platform: s6105Johannes Weiner2009-04-03
| | | | | | | | Support for the S6105 IP Camera Reference Design Kit. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: let platform override KERNELOFFSETJohannes Weiner2009-04-03
| | | | | | | | The linker script should not assume a fix offset in memory for the kernel, this is platform-specific, so let the platform set it. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: s6000 variantJohannes Weiner2009-04-03
| | | | | | | | Support for the Stretch S6000 Xtensa core variant. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: s6000 variant core definitionsJohannes Weiner2009-04-03
| | | | | | | S6000 core configuration files from Tensilica. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: variant irq set callbacksJohannes Weiner2009-04-03
| | | | | | | Allow the core variant code to provide irq enable/disable callbacks. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: variant-specific codeJohannes Weiner2009-04-03
| | | | | | | | Allow the variant to provide real code. Add empty dummy Makefiles for the existing variants. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: nommu supportJohannes Weiner2009-04-03
| | | | | | | Add support for !CONFIG_MMU setups. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: add flat supportOskar Schirmer2009-04-03
| | | | | | | | | Add the arch-specific header for flat support on xtensa in preparation for the Xtensa S6000 nommu port. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: enforce slab alignment to maximum register widthOskar Schirmer2009-04-03
| | | | | | | | | | | | XCHAL_DATA_WIDTH is the maximum register width, slab caches should be aligned to this. Theoretical fix as all variants have had an XCHAL_DATA_WIDTH of 4 (wordsize) for now. But the S6000 variant will raise this to 16. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: cope with ram beginning at higher addressesJohannes Weiner2009-04-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current assumption of the memory code is that the first RAM PFN in the system is 0. Adjust the relevant code to play well with setups where memory starts at higher addresses, indicated by PLATFORM_DEFAULT_MEM_START. The new memory model looks like this: +----------+--+----------------------+----------------+ | | | | | | | | RAM | | | | | | | +----------+--+----------------------+----------------+ | | | | | +- PFN 0 | +- min_low_pfn +- max_low_pfn +- max_pfn | +- ARCH_PFN_OFFSET +- PLATFORM_DEFAULT_MEM_START >> PAGE_SIZE The memory map contains pages starting from pfn ARCH_PFN_OFFSET up to max_low_pfn. The only zone used right now will span exactly the same region. Usually, ARCH_PFN_OFFSET and min_low_pfn are the same value. Handle them separately for robustness. Gapping pages will be in the memory map but marked as reserved and won't be touched. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: don't make bootmem bitmap larger than requiredJohannes Weiner2009-04-03
| | | | | | | | | | | | If min_low_pfn is non-zero, the bitmap reserved for bootmem is bigger than needed. The number of pages bootmem has to maintain is the range from min_low_pfn to max_low_pfn. For now it has only been a theoretical mistake, min_low_pfn was always zero. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: fix init_bootmem_node() argument orderJohannes Weiner2009-04-03
| | | | | | | | | | | The second argument to init_bootmem_node() is the PFN to place the bootmem bitmap at and the third argument is the first PFN on the node. This is currently backwards but never made any problems as both values were always zero. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: use correct stack pointer for stack tracesJohannes Weiner2009-04-03
| | | | | | | | | | | | | | Right now, the xtensa stacktrace code reads the _current_ kernel stack pointer if nothing is supplied. With debugging facilities like sysrq this means that the backtrace of the sysrq-handler is printed instead of a trace of the given task's stack. When no stack pointer is specified in show_trace() and show_stack(), use the stack pointer that comes with the handed in task descriptor to make stack traces more useful. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: beat Kconfig into shapeJohannes Weiner2009-04-03
| | | | | | | | | | | | | | Instead of making support code depend on variants or platforms, the latter should select what they need explicitely. Otherwise this starts looking weird when support code depends on !XTENSA_PLATFORM_FOO && !XTENSA_PLATFORM_BAR etc. This also includes some minor fixlets like converting bool and default to def_bool and fixing indentation and whitespace errors. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: remove redefinition of XCHAL_MMU_ASID_BITSJohannes Weiner2009-04-03
| | | | | | | | | This constant is defined in all core headers. Remove the redundant definition which might error out if other includes lead to inclusion of <variant/core.h>. Signed-off-by: Johannes Weiner <jw@emlix.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* Merge branch 'release' of ↵Linus Torvalds2009-04-01
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (29 commits) [IA64] BUG to BUG_ON changes [IA64] Fix typo/thinko in arch/ia64/sn/kernel/sn2/sn2_smp.c ia64: remove some warnings. ia64/xen: fix the link error. ia64/pv_ops/bp/xen: implemented binary patchable pv_cpu_ops. ia64/pv_ops/binary patch: define paravirt_dv_serialize_data() and suppress false positive warning. ia64/pv_ops/bp/module: support binary patching for kernel module. ia64/pv_ops: implement binary patching optimization for native. ia64/pv_op/binarypatch: add helper functions to support binary patching for paravirt_ops. ia64/pv_ops/xen/gate.S: xen gate page paravirtualization ia64/pv_ops: paravirtualize gate.S. ia64/pv_ops: move down __kernel_syscall_via_epc. ia64/pv_ops/xen: define xen specific gate page. ia64/pv_ops: gate page paravirtualization. ia64/pv_ops/xen/pv_time_ops: implement sched_clock. ia64/pv_ops/pv_time_ops: add sched_clock hook. ia64/pv_ops/xen: paravirtualize read/write ar.itc and ar.itm ia64/pv_ops: paravirtualize mov = ar.itc. ia64/pv_ops/pvchecker: support mov = ar.itc paravirtualization ia64/pv_ops: paravirtualize fsys.S. ...
| * [IA64] BUG to BUG_ON changesStoyan Gaydarov2009-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | Replace: if (test) BUG(); with BUG_ON(test); Signed-off-by: Stoyan Gaydarov <stoyboyker@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Fix typo/thinko in arch/ia64/sn/kernel/sn2/sn2_smp.cRandy Dunlap2009-04-01
| | | | | | | | | | | | | | sn2_ptc_init() has what looks like a cut-n-paste error. Fix it. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * Pull pvops into release branchTony Luck2009-03-31
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| | * ia64: remove some warnings.Isaku Yamahata2009-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the following warnings and related ones. Plus some cosmetics. arch/ia64/kernel/patch.c:112: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:135: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:166: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:202: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:220: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/xen: fix the link error.Isaku Yamahata2009-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following link error with xen_domu_defconfig. Depending on compiler version, it doesn't link as follows. So remove const and use __initdata for xen_iosapic_ops. > arch/ia64/xen/xen_pv_ops.c:878: error: xen_iosapic_ops causes a section type conflict Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/bp/xen: implemented binary patchable pv_cpu_ops.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | implemented xen binary patch for pv_cpu_ops. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/binary patch: define paravirt_dv_serialize_data() and suppress ↵Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | false positive warning. define paravirt_dv_serialize_data() and insert it to suppress false positive warnings. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/bp/module: support binary patching for kernel module.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | support binary patching for kernel module. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: implement binary patching optimization for native.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | implement binary patching optimization for pv_cpu_ops. With this optimization, indirect call for pv_cpu_ops methods can be converted into inline execution or direct call. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_op/binarypatch: add helper functions to support binary patching for ↵Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | paravirt_ops. add helper functions to support binary patching for paravirt_ops. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/xen/gate.S: xen gate page paravirtualizationIsaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | xen gate page paravirtualization Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: paravirtualize gate.S.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | paravirtualize gate.S. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: move down __kernel_syscall_via_epc.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move down __kernel_syscall_via_epc to the end of the page. We want to paravirtualize only __kernel_syscall_via_epc because it includes privileged instructions. Its paravirtualization increases its symbols size. On the other hand, each paravirtualized gate must have e symbols of same value and size to native's because the page is mapped to GATE_ADDR and GATE_ADDR + PERCPU_PAGE_SIZE and vmlinux is linked to those symbols. Later to have the same symbol size, we pads NOPs at the end of __kernel_syscall_via_epc. Move it after other functions to keep symbols of other functions have same values and sizes. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/xen: define xen specific gate page.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | define xen specific gate page. At this phase bits in the gate page is same to native. At the next phase, it will be paravirtualized. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: gate page paravirtualization.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | paravirtualize gate page by allowing each pv_ops instances to define its own gate page. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/xen/pv_time_ops: implement sched_clock.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | paravirtualize sched_clock. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/pv_time_ops: add sched_clock hook.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | add sched_clock() hook to paravirtualize sched_clock(). ia64 sched_clock() is based on ar.itc which isn't stable on virtualized environment because vcpu may move around on pcpus. So it needs paravirtualization. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/xen: paravirtualize read/write ar.itc and ar.itmIsaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | paravirtualize ar.itc and ar.itm in order to support save/restore. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: paravirtualize mov = ar.itc.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | paravirtualize mov reg = ar.itc. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/pvchecker: support mov = ar.itc paravirtualizationIsaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | add suport for mov = ar.itc to pvchecker. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: paravirtualize fsys.S.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | paravirtualize fsys.S. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/xen: preliminary to paravirtualizing fsys.S for xen.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a preliminary patch to paravirtualizing fsys.S. compile fsys.S twice one for native and one for xen, and switch them at run tine. Later fsys.S will be paravirtualized. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops: add hooks to paravirtualize fsyscall implementation.Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add two hooks, paravirt_get_fsyscall_table() and paravirt_get_fsys_bubble_doen() to paravirtualize fsyscall implementation. This patch just add the hooks fsyscall and don't paravirtualize it. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/xen: short-circuit tests for dom0Isaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | This patch is ia64 counter part of clean up of the xen predicates. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * ia64/pv_ops/xen: use __initconst instead of __initdata for const dataIsaku Yamahata2009-03-26
| | | | | | | | | | | | | | | | | | | | | | | | use __initconst instead of __initdata for const data like ec8148de85a73a3be397a59b6d8f4f32cf2dd254 Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | Pull cpumask into release branchTony Luck2009-03-31
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| | * | cpumask: use mm_cpumask() wrapper: ia64Rusty Russell2009-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Makes code futureproof against the impending change to mm->cpu_vm_mask. It's also a chance to use the new cpumask_ ops which take a pointer (the older ones are deprecated, but there's no hurry for arch code). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | cpumask: Use accessors code.: ia64Rusty Russell2009-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new API Use the accessors rather than frobbing bits directly. Most of this is in arch code I haven't even compiled, but is straightforward. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
| | * | cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: ia64Rusty Russell2009-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup, futureproof In fact, all cpumask ops will only be valid (in general) for bit numbers < nr_cpu_ids. So use that instead of NR_CPUS in various places. This is always safe: no cpu number can be >= nr_cpu_ids, and nr_cpu_ids is initialized to NR_CPUS at boot. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu>
| | * | cpumask: arch_send_call_function_ipi_mask: ia64Rusty Russell2009-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're weaning the core code off handing cpumask's around on-stack. This introduces arch_send_call_function_ipi_mask(). We also take the chance to wean send_IPI_mask off the obsolescent for_each_cpu_mask(): making it take the pointer seemed the most natural way. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | cpumask: remove the now-obsoleted pcibus_to_cpumask(): ia64Rusty Russell2009-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: reduce stack usage for large NR_CPUS cpumask_of_pcibus() is the new version. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | | | Merge branch 'x86-setup-for-linus' of ↵Linus Torvalds2009-04-01
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-setup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, setup: guard against pre-ACPI 3 e820 code not updating %ecx
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