- 09 Jan, 2006 40 commits
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Arnd Bergmann authored
One of my last patches contained a broken line from splitting out some other changes, this restores a working version. Signed-off-by:
Arnd Bergmann <arndb@de.ibm.com> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Arnd Bergmann authored
One of the two users of spufs_calls.owner still has a race when calling try_module_get while the module is removed. This makes it use the correct instance of owner. Noticed by Milton Miller. Signed-off-by:
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Kumar Gala authored
This patch adds support for the TQ Components TQM85xx modules. Currently the modules TQM8540/8541/8555/8560 are supported. Signed-off-by:
Stefan Roese <sr@denx.de> Signed-off-by:
Kumar Gala <galak@kernel.crashing.org> Signed-off-by:
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Arnd Bergmann authored
I can't really get a conclusive answer from the firmware people what to check for, so I just try scanning for anything that starts with "IBM,CPB", which should be correct for all hardware produced so far and for systemsim. Signed-off-by:
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Arnd Bergmann authored
Handling mailbox interrupts was broken in multiple respects, the combination of which was hiding the bugs most of the time. - The ibox interrupt mask was open initially even though there are no waiters on a newly created SPU. - Acknowledging the mailbox interrupt did not work because it is level triggered and the mailbox data is never retrieved from inside the interrupt handler. - The interrupt handler delivered interrupts with a disabled mask if another interrupt is triggered for the same class but a different mask. - The poll function did not enable the interrupt if it had not been enabled, so we might run into the poll timeout if none of the other bugs saved us and no signal was delivered. We probably still have a similar problem with blocking read/write on mailbox files, but that will result in extra wakeup in the worst case, not in incorrect behaviour. Signed-off-by:
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Arnd Bergmann authored
This patch reduces lock complexity of SPU scheduler, particularly for involuntary preemptive switches. As a result the new code does a better job of mapping the highest priority tasks to SPUs. Lock complexity is reduced by using the system default workqueue to perform involuntary saves. In this way we avoid nasty lock ordering problems that the previous code had. A "minimum timeslice" for SPU contexts is also introduced. The intent here is to avoid thrashing. While the new scheduler does a better job at prioritization it still does nothing for fairness. From: Mark Nutter <mnutter@us.ibm.com> Signed-off-by:
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Arnd Bergmann authored
This patch makes it easier to preempt an SPU context by having the scheduler hold ctx->state_sema for much shorter periods of time. As part of this restructuring, the control logic for the "run" operation is moved from arch/ppc64/kernel/spu_base.c to fs/spufs/file.c. Of course the base retains "bottom half" handlers for class{0,1} irqs. The new run loop will re-acquire an SPU if preempted. From: Mark Nutter <mnutter@us.ibm.com> Signed-off-by: -
Arnd Bergmann authored
spufs is rather noisy when debugging is enabled, this turns off the messages for production use. Signed-off-by:
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Arnd Bergmann authored
try_module_get returns true when NULL arguments, so we first need to check if there is a module loaded before getting the reference count. Signed-off-by:
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Arnd Bergmann authored
With the new rules for reserved pages, the spufs now needs working page reference counting. I should probably look into converting to vm_insert_page, but for now this patch makes spufs work again. Signed-off-by:
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Arnd Bergmann authored
This changes all exported symbols of spufs to EXPORT_SYMBOL_GPL. The spu_ibox_read/spu_wbox_write symbols are not exported any more when the scheduler patch is applied. Signed-off-by:
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Michael Ellerman authored
Milton has proposed that we should support a "linux,usable-memory" property on memory nodes which describes, in preference to "reg", the regions of memory Linux should use. This facility is required for kdump to inform the second kernel which memory it should use. Signed-off-by:
Haren Myneni <haren@us.ibm.com> Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
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Michael Ellerman authored
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Michael Ellerman authored
This patch adds code to parse and setup the crash kernel resource in the first kernel. PPC64 ignores the @x part, we always run at 32 MB. Signed-off-by:
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Michael Ellerman authored
Implementing the machine_crash_shutdown which will be called by crash_kexec (called in case of a panic, sysrq etc.). Disable the interrupts, shootdown cpus using debugger IPI and collect regs for all CPUs. elfcorehdr= specifies the location of elf core header stored by the crashed kernel. This command line option will be passed by the kexec-tools to capture kernel. savemaxmem= specifies the actual memory size that the first kernel has and this value will be used for dumping in the capture kernel. This command line option will be passed by the kexec-tools to capture kernel. Signed-off-by:
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Michael Ellerman authored
There's a few places where we need to fix things up for the kernel to work if it's linked at 32MB: - platforms/powermac/smp.c To start secondary cpus on pmac we patch the reset vector, which is fine. Except if we're above 32MB we don't have enough bits for an absolute branch, it needs to relative. - kernel/head_64.s - A few branches in the cpu hold code need to load the full target address and do a bctr. - after_prom_start needs to load PHYSICAL_START as the dest address, not 0. - The exception prolog needs to load the low word of the target adddress, not just the low halfword. - Fixup handling of the initial stab address. - kernel/setup_64.c smp_release_cpus() needs to write 1 to the spinloop flag near 0, not 32 MB. Signed-off-by: -
Michael Ellerman authored
Regardless of where the kernel's linked we always get interrupts at low addresses. This patch creates a trampoline in the first 3 pages of memory, where interrupts land, and patches those addresses to jump into the real kernel code at PHYSICAL_START. We also need to reserve the trampoline code and a bit more in prom.c Signed-off-by:
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Michael Ellerman authored
The fwnmi vectors can be anywhere < 32 MB, so we need to use a trampoline for them. The kdump kernel will register the trampoline addresses, which will then jump up to the real code above 32 MB. Signed-off-by:
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Michael Ellerman authored
This patch adds a Kconfig variable, CONFIG_CRASH_DUMP, which configures the built kernel for use as a Kdump kernel. Currently "all" this involves is changing the value of KERNELBASE to 32 MB. Signed-off-by:
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Paul Mackerras authored
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Stephen Rothwell authored
This allows iSeries to build again. It just moves pci_address_to_pio outside the #ifdef CONFIG_PPC_MULTIPLATFORM. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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linas authored
Minor: use macro to perform void pointer deref; this may someday help avoid pointer typecasting errors. Signed-off-by:
Linas Vepstas <linas@austin.ibm.com> Signed-off-by:
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Marcelo Tosatti authored
The following fixes some issues with the last mpc8xx_wdt update: - Adds missing #include <asm/io.h> - Use "uint __iomem" pointer for in_be32/out_be32 Signed-off-by:
Marcelo Tosatti <marcelo.tosatti@cyclades.com> Signed-off-by:
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Mike Kravetz authored
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:
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Michael Ellerman authored
This patch separates usage of KERNELBASE and PAGE_OFFSET. I haven't looked at any of the PPC32 code, if we ever want to support Kdump on PPC we'll have to do another audit, ditto for iSeries. This patch makes PAGE_OFFSET the constant, it'll always be 0xC * 1 gazillion for 64-bit. To get a physical address from a virtual one you subtract PAGE_OFFSET, _not_ KERNELBASE. KERNELBASE is the virtual address of the start of the kernel, it's often the same as PAGE_OFFSET, but _might not be_. If you want to know something's offset from the start of the kernel you should subtract KERNELBASE. Signed-off-by:
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Michael Ellerman authored
There's a bunch of code that compares an address with KERNELBASE to see if it's a "kernel address", ie. >= KERNELBASE. The proper test is actually to compare with PAGE_OFFSET, since we're going to change KERNELBASE soon. So replace all of them with an is_kernel_addr() macro that does that. Signed-off-by:
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Michael Ellerman authored
Currently machine_crash_shutdown() gets a struct pt_regs, but doesn't pass it through to the ppc_md function, it should. Signed-off-by:
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Andy Whitcroft authored
When we select ppc32 under the powerpc architecture we get the error below. This relates to defining distribute_irqs when this configuratiom option is undefined. CC arch/powerpc/sysdev/mpic.o .../arch/powerpc/sysdev/mpic.c: In function `mpic_setup_this_cpu': .../arch/powerpc/sysdev/mpic.c:788: error: `CONFIG_IRQ_ALL_CPUS' undeclared (first use in this function) Signed-off-by:Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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Andy Whitcroft authored
Clean up the currently available memory models for ppc32 under the powerpc architecture. We need FLATMEM for ppc32: enable it. SPARSEMEM is not parameterised for ppc32 so disable that. Take this opportunity to clean up white space for FLATMEM_ENABLE. Signed-off-by:
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Otavio Salvador authored
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Mike Kravetz authored
Here is an updated version of the patch that panics if no memory is found as Nathan suggested. I'm still concerned that panic strings (not just the one added here) at this stage of booting do not show up on my system. But, that is an issue separate from this patch. Combine get_mem_*_cells() routines to avoid multiple memory node lookups. Added missing of_node_put() call. Changed variable names to help with some confusion as to meaning. Signed-off-by:
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Paul Mackerras authored
This reverts f1fdc0117004d343698b9830e141491d5ae320d1 commit.
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Benjamin Herrenschmidt authored
This updates the OF address parsers to return the IO flags indicating the type of address obtained. It also adds a PCI call for converting physical addresses that hit IO space into into IO tokens, and add routines that return the translated addresses into struct resource Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Benjamin Herrenschmidt authored
The udbg low level io layer has an issue with udbg_getc() returning a char (unsigned on ppc) instead of an int, thus the -1 if you had no available input device could end up turned into 0xff, filling your display with bogus characters. This fixes it, along with adding a little blob to xmon to do a delay before exiting when getting an EOF and fixing the detection of ADB keyboards in udbg_adb.c Signed-off-by:
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Andy Whitcroft authored
When compiling without BOOTX_TEXT the following warning is emitted. Fix up the definition to only be made when required. CC arch/powerpc/platforms/powermac/udbg_adb.o .../arch/powerpc/platforms/powermac/udbg_adb.c:41: warning: `udbg_adb_use_btext' defined but not used Signed-off-by: -
Andy Whitcroft authored
udbg_adb_init() has become dependent on btext_drawchar, even when BOOTX_TEXT support is not selected. This leads to the error below. Make the check dependant on BOOTX_TEXT. LD .tmp_vmlinux1 arch/powerpc/platforms/built-in.o(.toc1+0xa40): undefined reference to `btext_drawchar' Signed-off-by: -
Linas Vepstas authored
23-rpaphp-migrate.patch (parts) This patch moves some pci device add & remove code from the PCI hotplug directory to the arch/powerpc/kernel directory, and cleans it up a tad. The primary reason for this is that the code performs some fairly generic operations that are shared with the PCI error recovery code (living in the arch/powerpc/kernel directory). Signed-off-by:
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Linas Vepstas authored
22-rpaphp-eliminate-dupe-code.patch (parts) The RPAPHP code contains two routines that appear to be gratuitous copies of very similar pci code. In particular, rpaphp_claim_resource ~~ pci_claim_resource rpadlpar_claim_one_bus == pcibios_claim_one_bus This makes pcibios_claim_one_bus from arch/powerpc/kernel/pci_64.c available to the RPAPHP code. Signed-off-by:
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Linas Vepstas authored
20-rpaphp-eeh-cleanup.patch This patch move some code from the rpaphp directory, to the powerpc directory, where it should have been all along (Among other things, I need it in the powerpc directory for the PCI error recovery.) Please note that patch affects TWO maintainers: Paul, after applying the powerpc part, please ask that GregKH appli the PCI part. It is safe to have the powerpc part go in first. It would be bad to have the PCI part go in first. Signed-off-by:
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Mike Kravetz authored
I started to add missing of_node_put() calls to the routines that determine the number of cells for memory. Decided to combine the routines instead of making separate node lookups. Changed variable names to help with some confusion as to meaning. Signed-off-by:
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