- 13 Oct, 2008 15 commits
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Anton Vorontsov authored
Specifying user-selectable option in the qe_lib/Kconfig was a bad idea because the qe_lib/Kconfig is included into the top level Kconfig, and thus the QE_GPIO option appears at the top level menu. This patch effectively moves the QE_GPIO option under the platform menu instead. Signed-off-by:
Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by:
Kumar Gala <galak@kernel.crashing.org>
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Timur Tabi authored
Modify the Kconfig so that Freescale QUICC Engine (QE) support is a selectable option, thereby allowing users to compile kernels without any QE support. The drawback is that QE support is now disabled by default on platforms that have a QE, and so a defconfig is needed to enable QE and QE devices (like UCC GETH). Fortunately, all the current relevant defconfigs do that already. Signed-off-by:
Timur Tabi <timur@freescale.com> Signed-off-by:
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Martyn Welch authored
Support for the SBC610 VPX Single Board Computer from GE Fanuc (PowerPC MPC8641D). A number of MPC8641D based route interrupts for on-board interrupts through a FPGA based interrupt controller, which is chained with the MPC8641D's mpic. This patch provides a basic driver to allow basic routing of interrupts to the mpic. Signed-off-by:
Martyn Welch <martyn.welch@gefanuc.com> Signed-off-by:
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Kumar Gala authored
Add interrupt info to the MPC8536DS .dts for the RTC Signed-off-by: -
Milton Miller authored
The comment in the code was asking "Do we have to do this?", and according to x86 and s390 the answer is no, the scheduler will do it before calling the arch hook. Signed-off-by:
Milton Miller <miltonm@bga.com> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Milton Miller authored
A single full sync (mb()) is requrired to order the mmio to the qirr reg with the set or clear of the message word. However, test_and_clear_bit has the effect of smp_mb() and we are not doing any other io from here, so we don't need a mb per bit processed. Signed-off-by:
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Milton Miller authored
Several printks were broken at word boundaries for line length. Some even referred to old function names. Using __func__ and changing the text slightly for the format allows these printk formats to fit on one line. Signed-off-by:
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Milton Miller authored
It is physically per-cpu, and we want the irq layer to treat it that way. Signed-off-by:
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Milton Miller authored
EOI normally has the side effect of returning the cpu to the base priority to recieve the next interrupt. This is actually controlled by the top byte of the xirr register. When we are exiting the kernel in kexec we must eoi the ipi for the next kernel because we never return from the handler, but we want to leave interrupt delivery blocked until the next kernel takes action. Since the hardware ipi vector is fixed, its easiest to just do the eoi explicitly. Signed-off-by:
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Milton Miller authored
This factors out processors joining and unjoining the Global Interrupt Queue into a separate function. There is a bit of math to calculate the arguments to rtas to join or leave the global interrupt queue, and a warning on failure afterwards. Make a helper for the 3 callers. Signed-off-by:
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Milton Miller authored
We only need to check the ibm,interrupt-server#-size property once, not once per global server and thread. We can use !CONFIG_SMP cpu masks and hard_smp_processor_id() to avoid an ifdef. Put the node when breaking out of the loop on lpar systems. Signed-off-by:
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Milton Miller authored
Trim unneeded includes from xics.c. We don't use signals or gfp flags, we use only OF functions and don't need prom, and the 8259 is now handled by our caller. Signed-off-by:
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Milton Miller authored
The xirr is 32 bits in hardware, but the hypervisor requries the upper bits of the register to be clear on the hcall. By changing the type from signed to unsigned int we can drop masking it back to 32 bits. Signed-off-by:
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Milton Miller authored
Now that xics_update_irq_servers is called only from init and hotplug code, it becomes possible to clean up the ordering of functions in the file, grouping them but the interfaces they implement. Signed-off-by:
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Milton Miller authored
xics supports only one ipi per cpu, and expects software to use some queue to know why the interrupt was sent. In Linux, we use a an array of bitmaps indexed by cpu to identify the message. Currently the bits are set in smp.c and decoded in xics.c, with the data structure in a header file. Consolidate the code in xics.c similar to mpic and other interrupt controllers. Also, while making the the array static, the message word doesn't need to be volatile as set_bit and test_clear_bit take care of it for us, and put it under ifdef smp. Signed-off-by:
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- 12 Oct, 2008 5 commits
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Kumar Gala authored
Previously the FDT header field boot_cpuid_phys wasn't actually used on ppc32. Instead the physical boot cpuid was assumed to be 0 for !CONFIG_SMP. Signed-off-by:
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Josh Boyer authored
There is an old workaround in the sysdev/Makefile for dealing with arch/ppc vs. arch/powerpc compiles. This is no longer needed as arch/ppc is dead. Signed-off-by:
Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by:
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Anton Vorontsov authored
The helper is factored out of of_get_gpio(). Will be used by the QE pin multiplexing functions (they need to parse the gpios = <> too). Signed-off-by:
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Milton Miller authored
Currently, every time we determine which irq server to use, we check if default_server, which is the id of the bootcpu, is still online. But default_server is a hardware cpu, not the logical cpu id needed to index cpu_online_map. Since the default server can only go offline during a cpu hotplug event, explicitly check the default server and choose the new one when we move irqs away from the cpu being offlined. This has the added benefit of only needing the boot_cpuid to be updated and not relying on the cpu being marked offline during migrate_irqs_away. Also, since xics_update_irq_servers only reads device tree information, we can call it before xics_init_host in xics_init_IRQ and then default_server will always be valid when we can reach get_irq_server via the host ops. Signed-off-by:
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Milton Miller authored
When reciving an irq vector that does not have a linux mapping, the kernel prints a message and calls RTAS to disable the irq source. Previously the kernel did not EOI the interrupt, causing the source to think it is still being processed by software. While this does add an additional layer of protection against interrupt storms had RTAS failed to disable the source, it also prevents the interrupt from working when a driver later enables it. (We could alternatively send an EOI on startup, but that strategy would likely fail on an emulated xics.) All interrupts should be disabled when the kernel starts, but this can be observed if a driver does not shutdown an interrupt in its reboot hook before starting a new kernel with kexec. Michael reports this can be reproduced trivially by banging the keyboard while kexec'ing on a P5 LPAR: even though the hvc_console driver request's the console irq later in boot, the console is non-functional because we're receiving no console interrupts. Reported-By: Michael Ellerman Signed-off-by:
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- 10 Oct, 2008 11 commits
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Benjamin Herrenschmidt authored
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Jon Tollefson authored
If there are multiple reserved memory blocks via lmb_reserve() that are contiguous addresses and on different NUMA nodes we are losing track of which address ranges to reserve in bootmem on which node. I discovered this when I recently got to try 16GB huge pages on a system with more then 2 nodes. When scanning the device tree in early boot we call lmb_reserve() with the addresses of the 16G pages that we find so that the memory doesn't get used for something else. For example the addresses for the pages could be 4000000000, 4400000000, 4800000000, 4C00000000, etc - 8 pages, one on each of eight nodes. In the lmb after all the pages have been reserved it will look something like the following: lmb_dump_all: memory.cnt = 0x2 memory.size = 0x3e80000000 memory.region[0x0].base = 0x0 .size = 0x1e80000000 memory.region[0x1].base = 0x4000000000 .size = 0x2000000000 reserved.cnt = 0x5 reserved.size = 0x3e80000000 reserved.region[0x0].base = 0x0 .size = 0x7b5000 reserved.region[0x1].base = 0x2a00000 .size = 0x78c000 reserved.region[0x2].base = 0x328c000 .size = 0x43000 reserved.region[0x3].base = 0xf4e8000 .size = 0xb18000 reserved.region[0x4].base = 0x4000000000 .size = 0x2000000000 The reserved.region[0x4] contains the 16G pages. In arch/powerpc/mm/num.c: do_init_bootmem() we loop through each of the node numbers looking for the reserved regions that belong to the particular node. It is not able to identify region 0x4 as being a part of each of the 8 nodes. It is assuming that a reserved region is only on a single node. This patch takes out the reserved region loop from inside the loop that goes over each node. It looks up the active region containing the start of the reserved region. If it extends past that active region then it adjusts the size and gets the next active region containing it. Signed-off-by:Jon Tollefson <kniht@linux.vnet.ibm.com> Signed-off-by:
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Paul Mackerras authored
Commit 9b09c6d9 ("powerpc: Change the default link address for pSeries zImage kernels") changed the real-base value in the CHRP note added by the addnote program from 12MB to 32MB to give more space for Open Firmware to load the zImage. (The real-base value says where we want OF to position itself in memory.) However, this change was ineffective on most pSeries machines, because the RPA note added by addnote has the "ignore me" flag set to 1. This was intended to tell OF to ignore just the RPA note, but has the side effect of also making OF ignore the CHRP note (at least on most pSeries machines). To solve this we have to set the "ignore me" flag to 0 in the RPA note. (We can't just omit the RPA note because that is equivalent to having an RPA note with default values, and the default values are not what we want.) However, then we have to make sure the values in the zImage's RPA note match up with the values that the kernel supplies later in prom_init.c with either the ibm,client-architecture-support call or the process-elf-header call in prom_send_capabilities(). So this sets the "ignore me" flag in the RPA note in addnote to 0, and adjusts the RPA note values in addnote.c and in prom_init.c to be consistent with each other and with the values in ibm_architecture_vec. However, since the wrapper is independent of the kernel, this doesn't ensure that the notes will stay consistent. To ensure that, this adds code to addnote.c so that it can extract the kernel's RPA note from the kernel binary and put that in the zImage. To that end, we put the kernel's fake ELF header (which contains the kernel's RPA note) into its own section, and arrange for wrapper to pull out that section with objcopy and pass it to addnote, which then extracts the RPA note from it and transfers it to the zImage. Signed-off-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Grant Likely authored
Compatible property values in the form linux,<modalias> is not documented anywhere and using it leaks Linux implementation details into the device tree data (which is bad). Remove support for compatible values of this form. If any platforms exist which depended on this code (and I don't know of any), then they can be fixed up by adding legacy translations to the lookup table in this file. Signed-off-by:
Grant Likely <grant.likely@secretlab.ca> Signed-off-by:
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Josh Poimboeuf authored
The powerpc 32-bit and 64-bit kernel_thread functions don't properly propagate errors being returned by the clone syscall. (In the case of error, the syscall exit code returns a positive errno in r3 and sets the CR0[SO] bit.) This patch fixes that by negating r3 if CR0[SO] is set after the syscall. Signed-off-by:
Josh Poimboeuf <jpoimboe@us.ibm.com> Signed-off-by:
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Roel Kluin authored
Offset is unsigned and when an address isn't found in the vma map vma_map_lookup() returns the vma physical address + 0x10000000. vma_map_lookup used to return 0xffffffff on a failed lookup, but a change was made to return the vma physical address + 0x10000000 There are two callers of vam_map_lookup: one of them correctly deals with this new return value, but the other (below) did not. Signed-off-by:
Roel Kluin <12o3l@tiscali.nl> Acked-by:
Maynard Johnson <maynardj@us.ibm.com> Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Anton Vorontsov authored
When no interrupt is specified the pata_of_platform fills the irq_res resource with -1, which is wrong to do for two reasons: 1. By definition, 'no irq' should be IRQ 0, not some negative integer; 2. pata_platform checks for irq_res.start > 0, but since irq_res.start is unsigned type, the check will be true for `-1'. Reported-by:
Steven A. Falco <sfalco@harris.com> Signed-off-by:
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Nathan Fontenot authored
Testing hotplug memory remove has revealed that we can oops in pseries_lmb_remove(). The incorrect shift causes a NULL pointer dereference in the page_zone() inline routine. I have only been able to reproduce the oops on kernels with large pages enabled. Tested on Power5 and Power6 with and without large pages enabled. Signed-off-by:
Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by:
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Kou Ishizaki authored
A mutex_unlock(&gang->aff_mutex) in spufs_create_context() is missing in case spufs_context_open() fails. As a result, spu_create syscall and spu_get_idle() may block. This patch adds the mutex_unlock. Signed-off-by:
Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Acked-by:
Andre Detsch <adetsch@br.ibm.com>
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Jeremy Kerr authored
Style change: use inc_nlink instead of incrementing i_nlink directly Signed-off-by: -
Jeremy Kerr authored
Currently, an empty spufs root inode has nlink count of 1. However, the directory has two links; / -> spu and /spu/ -> . This change increments the link count of the root inode in spufs. Signed-off-by:
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- 07 Oct, 2008 9 commits
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Benjamin Herrenschmidt authored
When manipulating 64-bit PCI addresses, the code would lose the top 32-bit in a couple of places when shifting a pfn due to missing type casting from the 32-bit pfn to a 64-bit resource before the shift. This breaks using newer X servers for example on 440 machines with the PCI bus above 32-bit. Signed-off-by: -
Vitaly Mayatskikh authored
rtas_log_read() doesn't check file flags for O_NONBLOCK and blocks non-blocking readers of /proc/ppc64/rtas/error_log when there is no data available. This fixes it. Also rtas_log_read() returns now with ENODATA to prevent suspending of process in wait_event_interruptible() when logging facility was switched off and log is already empty. Signed-off-by:
Vitaly Mayatskikh <v.mayatskih@gmail.com> Acked-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Timur Tabi authored
Fix various defconfigs for Freescale chip based boards to remove CONFIG_PPC_PMAC or CONFIG_PPC_CHRP which crept in due to those being default y Signed-off-by:
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Johannes Berg authored
powerpc uses CONFIG_FORCE_MAX_ZONEORDER, and some things depend on it being at least 10 when 64k pages are not configured (notably the dart iommu code with CONFIG_PM). The defaults are fine, but when going from a 64K pages config to one without 64K pages, MAX_ORDER stays at 9 which is too low for 4K pages. This patch makes the Kconfig enforce at least the defaults. Signed-off-by:
Johannes Berg <johannes@sipsolutions.net> Acked-by:
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Johannes Berg authored
A bug in my initial 64-bit hibernation code breaks it when using page sizes that aren't 4K. Signed-off-by:
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Johann Felix Soden authored
The variable statindex in send_request is never read, so remove it. Signed-off-by:
Johann Felix Soden <johfel@users.sourceforge.net> Signed-off-by:
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Geert Uytterhoeven authored
Documentation/powerpc/smp.txt is so outdated that it makes sense to just remove it. Signed-off-by:
Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by:
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Geert Uytterhoeven authored
commit 14cf11af ("powerpc: Merge enough to start building in arch/powerpc.") unwired /proc/ppc_htab, and commit 917f0af9 ("powerpc: Remove arch/ppc and include/asm-ppc") removed the rest of the /proc/ppc_htab support, but there are still a few references left. Kill them for good. Signed-off-by:
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Roland Dreier authored
Commit 8b150478 ("ppc: make phys_mem_access_prot() work with pfns instead of addresses") fixed page_is_ram() in arch/ppc to avoid overflow for addresses above 4G on 32-bit kernels. However arch/powerpc's page_is_ram() is missing the same fix -- it computes a physical address by doing pfn << PAGE_SHIFT, which overflows if pfn corresponds to a page above 4G. In particular this causes pages above 4G to be mapped with the wrong caching attribute; for example many ppc440-based SoCs have PCI space above 4G, and mmap()ing MMIO space may end up with a mapping that has caching enabled. Fix this by working with the pfn and avoiding the conversion to physical address that causes the overflow. This patch compares the pfn to max_pfn, which is a semantic change from the old code -- that code compared the physical address to high_memory, which corresponds to max_low_pfn. However, I think that was is another bug, since highmem pages are still RAM. Reported-by:
vb <vb@vsbe.com> Signed-off-by:
Roland Dreier <rolandd@cisco.com> Acked-by:
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