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* [PATCH] Dynamic kernel command-line: powerpcAlon Bar-Lev2007-02-12
| | | | | | | | | | Rename saved_command_line into boot_command_line. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [POWERPC] arch/ppc/kernel/prom.c of_node_(get|put) cleanupMariusz Kozlowski2007-01-24
| | | | | | | Remove redundant argument checks for of_node_get() and of_node_put(). Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Support ibm,dynamic-reconfiguration-memory nodesPaul Mackerras2006-12-10
| | | | | | | | | | | | | | | | | | | | | | | For PAPR partitions with large amounts of memory, the firmware has an alternative, more compact representation for the information about the memory in the partition and its NUMA associativity information. This adds the code to the kernel to parse this alternative representation. The other part of this patch is telling the firmware that we can handle the alternative representation. There is however a subtlety here, because the firmware will invoke a reboot if the memory representation we request is different from the representation that firmware is currently using. This is because firmware can't change the representation on the fly. Further, some firmware versions used on POWER5+ machines have a bug where this reboot leaves the machine with an altered value of load-base, which will prevent any kernel booting until it is reset to the normal value (0x4000). Because of this bug, we do NOT set fake_elf.rpanote.new_mem_def = 1, and thus we do not request the new representation on POWER5+ and earlier machines. We do request the new representation on POWER6, which uses the ibm,client-architecture-support call. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Distinguish POWER6 partition modes and tell userspacePaul Mackerras2006-12-04
| | | | | | | | | | | | | | | | | This adds code to look at the properties firmware puts in the device tree to determine what compatibility mode the partition is in on POWER6 machines, and set the ELF aux vector AT_HWCAP and AT_PLATFORM entries appropriately. Specifically, we look at the cpu-version property in the cpu node(s). If that contains a "logical" PVR value (of the form 0x0f00000x), we call identify_cpu again with this PVR value. A value of 0x0f000001 indicates the partition is in POWER5+ compatibility mode, and a value of 0x0f000002 indicates "POWER6 architected" mode, with various extensions disabled. We also look for various other properties: ibm,dfp, ibm,purr and ibm,spurr. Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'linux-2.6' into for-linusPaul Mackerras2006-12-03
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| * [POWERPC] Fix device_is_compatible() const warningBenjamin Herrenschmidt2006-10-24
| | | | | | | | | | | | | | | | | | Fix a const'ification related warning with device_is_compatible() and friends related to get_property() not properly having const on it's input device node argument. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [POWERPC] cell: add cpufreq driver for Cell BE processorChristian Krafft2006-10-25
|/ | | | | | | | This patch adds a cpufreq backend driver to enable frequency scaling on cell. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Minor fix for bootargs propertyGeoff Levand2006-10-06
| | | | | | | | | | | | | | | | Avoid the use of an uninitialized stack variable when the powerpc device tree bootargs property is either missing or incorrectly defined. This also makes CONFIG_CMDLINE work properly under these conditions. This change adds a test for the existence of the bootargs property. early_init_dt_scan_chosen() tests for a zero length bootargs property in its CONFIG_CMDLINE processing, but the current implementation of of_get_flat_dt_prop() doesn't assign a value to the length when no property is found. Since an automatic variable is used, a stale value from the stack will be used in the test. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Define of_read_ulong helperPaul Mackerras2006-09-20
| | | | | | | | | | There are various places where we want to extract an unsigned long value from a device-tree property that can be 1 or 2 cells in length. This replaces some open-coded calculations, and one place where we assumed without checking that properties were the length we wanted, with a little of_read_ulong() helper. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Make get_property() return a const void *Jeremy Kerr2006-07-31
| | | | | | | | | | | | | | | | | | | Previous changes have treated the return values of get_property as const, so now we can make the actual change to get_property(). There shouldn't be a need to cast the return values anymore. We will now get compiler warnings when property values are assigned to a non-const variable. If properties need to be updated, there's still the of_find_property function. Built for cell_defconfig, chrp32_defconfig, g5_defconfig, iseries_defconfig, maple_defconfig, pmac32_defconfig, ppc64_defconfig and pseries_defconfig. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Constify & voidify get_property()Jeremy Kerr2006-07-31
| | | | | | | | | | | Now that get_property() returns a void *, there's no need to cast its return value. Also, treat the return value as const, so we can constify get_property later. powerpc core changes. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Add new interrupt mapping core and change platforms to use itBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the new irq remapper core and removes the old one. Because there are some fundamental conflicts with the old code, like the value of NO_IRQ which I'm now setting to 0 (as per discussions with Linus), etc..., this commit also changes the relevant platform and driver code over to use the new remapper (so as not to cause difficulties later in bisecting). This patch removes the old pre-parsing of the open firmware interrupt tree along with all the bogus assumptions it made to try to renumber interrupts according to the platform. This is all to be handled by the new code now. For the pSeries XICS interrupt controller, a single remapper host is created for the whole machine regardless of how many interrupt presentation and source controllers are found, and it's set to match any device node that isn't a 8259. That works fine on pSeries and avoids having to deal with some of the complexities of split source controllers vs. presentation controllers in the pSeries device trees. The powerpc i8259 PIC driver now always requests the legacy interrupt range. It also has the feature of being able to match any device node (including NULL) if passed no device node as an input. That will help porting over platforms with broken device-trees like Pegasos who don't have a proper interrupt tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] change get_property to return void *Jeremy Kerr2006-07-02
| | | | | | | | | | | | Change the get_property() function to return a void *. This allows us to later remove the cast done in the majority of callers. Built for pseries, iseries, pmac32, cell, cbesim, g5, systemsim, maple, and mpc* defconfigs Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [POWERPC] Use little-endian bit from firmware ibm,pa-features propertyPaul Mackerras2006-06-29
| | | | Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Setup RTAS values earlier, to enable rtas_call() earlierMichael Ellerman2006-06-27
| | | | | | | | | | | | | | Althought RTAS is instantiated when we enter the kernel, we can't actually call into it until we know its entry point address. Currently we grab that in rtas_initialize(), however that's quite late in the boot sequence. To enable rtas_call() earlier, we can grab the RTAS entry etc. values while we're scanning the flattened device tree. There's existing code to retrieve the values from /chosen, however we don't store them there anymore, so remove that code. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Export flat device tree via debugfs for debuggingMichael Ellerman2006-06-27
| | | | | | | | | | | | | | If DEBUG is turned on in prom.c, export the flat device tree via debugfs. This has been handy on several occasions. To look at it: # mount -t debugfs none /sys/kernel/debug # od -a /sys/kernel/debug/powerpc/flat-device-tree and/or # dtc -fI dtb /sys/kernel/debug/powerpc/flat-device-tree -O dts Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] cell: add RAS supportBenjamin Herrenschmidt2006-06-21
| | | | | | | | | | | | | | | | | This is a first version of support for the Cell BE "Reliability, Availability and Serviceability" features. It doesn't yet handle some of the RAS interrupts (the ones described in iic_is/iic_irr), I'm still working on a proper way to expose these. They are essentially a cascaded controller by themselves (sic !) though I may just handle them locally to the iic driver. I need also to sync with David Erb on the way he hooked in the performance monitor interrupt. So that's all for 2.6.17 and I'll do more work on that with my rework of the powerpc interrupt layer that I'm hacking on at the moment. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Prevent duplicate lmb reservations for Device Tree blob.Jon Loeliger2006-06-21
| | | | | Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Use 64k pages without needing cache-inhibited large pagesPaul Mackerras2006-06-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some POWER5+ machines can do 64k hardware pages for normal memory but not for cache-inhibited pages. This patch lets us use 64k hardware pages for most user processes on such machines (assuming the kernel has been configured with CONFIG_PPC_64K_PAGES=y). User processes start out using 64k pages and get switched to 4k pages if they use any non-cacheable mappings. With this, we use 64k pages for the vmalloc region and 4k pages for the imalloc region. If anything creates a non-cacheable mapping in the vmalloc region, the vmalloc region will get switched to 4k pages. I don't know of any driver other than the DRM that would do this, though, and these machines don't have AGP. When a region gets switched from 64k pages to 4k pages, we do not have to clear out all the 64k HPTEs from the hash table immediately. We use the _PAGE_COMBO bit in the Linux PTE to indicate whether the page was hashed in as a 64k page or a set of 4k pages. If hash_page is trying to insert a 4k page for a Linux PTE and it sees that it has already been inserted as a 64k page, it first invalidates the 64k HPTE before inserting the 4k HPTE. The hash invalidation routines also use the _PAGE_COMBO bit, to determine whether to look for a 64k HPTE or a set of 4k HPTEs to remove. With those two changes, we can tolerate a mix of 4k and 64k HPTEs in the hash table, and they will all get removed when the address space is torn down. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Auto reserve of device tree blobJimi Xenidis2006-05-19
| | | | | | | | | | | | | | | | A devtree compiler (dtc) generated devtree blob is "relocatable" and so does not contain a reserved_map entry for the blob itself. This means that if passed to Linux, Linux will not get lmb_reserve() the blob and it could be over. The following patch will explicitly reserve the "blob" as it was given to us and stops prom_init.c from creating a reserved mapping for the blob. NOTE: that the dtc/kexec should not generate the blob reservation entry. Although if they do, LMB reserver handles overlaps. Signed-off-by: <jimix@watson.ibm.com> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Move crashkernel= handling into the kernel.Michael Ellerman2006-05-19
| | | | | | This was missing a quilt ref. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Kdump header cleanupMichael Ellerman2006-05-19
| | | | | | | | | | | | We need to know the base address of the kdump kernel even when we're not a kdump kernel, so add a #define for it. Move the logic that sets the kdump kernelbase into kdump.h instead of page.h. Rename kdump_setup() to setup_kdump_trampoline() to make it clearer what it's doing, and add an empty definition for the !CRASH_DUMP case to avoid a Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Unify mem= handlingMichael Ellerman2006-05-19
| | | | | | | | | | | | | | | | | | | | We currently do mem= handling in three seperate places. And as benh pointed out I wrote two of them. Now that we parse command line parameters earlier we can clean this mess up. Moving the parsing out of prom_init means the device tree might be allocated above the memory limit. If that happens we'd have to move it. As it happens we already have logic to do that for kdump, so just genericise it. This also means we might have reserved regions above the memory limit, if we do the bootmem allocator will blow up, so we have to modify lmb_enforce_memory_limit() to truncate the reserves as well. Tested on P5 LPAR, iSeries, F50, 44p. Tested moving device tree on P5 and 44p and F50. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Parse early parameters earlierMichael Ellerman2006-05-19
| | | | | | | | | | | | | | | Currently we have call parse_early_param() earliyish, but not really very early. In particular, it's not early enough to do things like mem=x or crashkernel=blah, which is annoying. So do it earlier. I've checked all the early param handlers, and none of them look like they should have any trouble with this. I haven't tested the booke_wdt ones though. On 32-bit we were doing the CONFIG_CMDLINE logic twice, so don't. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Use the ibm,pa-features property if availablePaul Mackerras2006-05-03
| | | | | | | | | | | | | Forthcoming IBM machines will have a "ibm,pa-features" property on CPU nodes, that contains bits indicating which optional architecture features are implemented by the CPU. This adds code to use the property, if present, to update our CPU feature bitmaps. Note that this means we can both set and clear feature bits based on what the firmware tells us. This is based on a patch by Will Schmidt <willschm@us.ibm.com>. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Lower threshold for DART enablement to 1GBOlof Johansson2006-04-21
| | | | | | | | | | | | | | | | | | | Turn on the DART already at 1GB. This is needed because of crippled devices in some systems, i.e. Airport Extreme cards, only supporting 30-bit DMA addresses. Otherwise, users with between 1 and 2GB of memory will need to manually enable it with iommu=force, and that's no good. Some simple performance tests show that there's a slight impact of enabling DART, but it's in the 1-3% range (kernel build with disk I/O as well as over NFS). iommu=off can still be used for those who don't want to deal with the overhead (and don't need it for any devices). Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Kill _machine and hard-coded platform numbersBenjamin Herrenschmidt2006-03-28
| | | | | | | | | | | | | | | | This removes statically assigned platform numbers and reworks the powerpc platform probe code to use a better mechanism. With this, board support files can simply declare a new machine type with a macro, and implement a probe() function that uses the flattened device-tree to detect if they apply for a given machine. We now have a machine_is() macro that replaces the comparisons of _machine with the various PLATFORM_* constants. This commit also changes various drivers to use the new macro instead of looking at _machine. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: a couple of trivial compile warning fixesStephen Rothwell2006-03-28
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: use memparse() for mem= command line parsingKumar Gala2006-03-27
| | | | | | Use memparse() instead of our own code for handling the parsing of mem= Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [PATCH] powerpc: Allow non zero boot cpuidsAnton Blanchard2006-03-26
| | | | | | | | | | | | | | | | | We currently have a hack to flip the boot cpu and its secondary thread to logical cpuid 0 and 1. This means the logical - physical mapping will differ depending on which cpu is boot cpu. This is most apparent on kexec, where we might kexec on any cpu and therefore change the mapping from boot to boot. The patch below does a first pass early on to work out the logical cpuid of the boot thread. We then fix up some paca structures to match. Ive also removed the boot_cpuid_phys variable for ppc64, to be consistent we use get_hard_smp_processor_id(boot_cpuid) everywhere. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge ../powerpc-mergePaul Mackerras2006-02-28
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| * [PATCH] powerpc: Fix mem= cmdline handling on arch/powerpc for !MULTIPLATFORMKumar Gala2006-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | mem= command line option was being ignored in arch/powerpc if we were not a CONFIG_MULTIPLATFORM (which is handled via prom_init stub). The initial command line extraction and parsing needed to be moved earlier in the boot process and have code to actual parse mem= and do something about it. Also, fixed a compile warning in the file. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] powerpc: Always panic if lmb_alloc() failsMichael Ellerman2006-02-07
|/ | | | | | | | | | | | | | | | 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>
* [PATCH] powerpc: remove pointer/integer confusion in of_find_node_by_nameOlaf Hering2006-02-07
| | | | | | | remove pointer/integer confusion Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Don't overwrite flat device tree with kdump kernelMichael Ellerman2006-02-07
| | | | | | | | | | | | | | It's possible for prom_init to allocate the flat device tree inside the kdump crash kernel region. If this happens, when we load the kdump kernel we overwrite the flattened device tree, which is bad. We could make prom_init try and avoid allocating inside the crash kernel region, but then we run into issues if the crash kernel region uses all the space inside the RMO. The easiest solution is to move the flat device tree once we're running in the kernel. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Don't allocate zero bytes in finish_device_tree()Michael Ellerman2006-02-07
| | | | | | | | | | | | In prom.c we run finish_node() on allnodes twice. The first time we just calculate how much memory we'll need, the second time we do the actual work. If the calculation stage determines that we need 0 bytes, then we should skip the lmb allocation. Although an alloc of zero will work, it has been seen to lead to a BUG_ON() in reserve_bootmem() on at least one machine. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Add of_find_property functionDave C Boutcher2006-01-13
| | | | | | | | | Add an of_find_property function that returns a struct property given a property name. Then change the get_property function to use that routine internally. Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Add/remove/update properties in firmware device treeDave C Boutcher2006-01-13
| | | | | | | | | | | | | | | | | | Add support for updating and removing device tree properties. Since we hand out pointers to properties with gay abandon, we can't just free the property storage. Instead we move deleted, or the old copy of an updated property, to a "dead properties" list. Also note, its not feasable to kref device tree properties. we call get_property() all over the kernel in a wild variety of contexts. One consequence of this change is that we now take a read_lock(&devtree_lock) when doing get_property(). Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Fixed memory reserve map layoutKumar Gala2006-01-12
| | | | | | | | | | | | | | powerpc: Fixed memory reserve map layout The memory reserve map is suppose to be a pair of 64-bit integers to represent each region. On ppc32 the code was treating the pair as two 32-bit integers. Additional the prom_init code was producing the wrong layout on ppc32. Added a simple check to try to provide backwards compatibility. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* spelling: s/retreive/retrieve/Adrian Bunk2006-01-09
| | | | Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] powerpc: Experimental support for new G5 Macs (#2)Benjamin Herrenschmidt2006-01-08
| | | | | | | | | | | | | This adds some very basic support for the new machines, including the Quad G5 (tested), and other new dual core based machines and iMac G5 iSight (untested). This is still experimental ! There is no thermal control yet, there is no proper handing of MSIs, etc.. but it boots, I have all 4 cores up on my machine. Compared to the previous version of this patch, this one adds DART IOMMU support for the U4 chipset and thus should work fine on setups with more than 2Gb of RAM. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Remove device_node addrs/n_addrBenjamin Herrenschmidt2006-01-08
| | | | | | | | | | | | The pre-parsed addrs/n_addrs fields in struct device_node are finally gone. Remove the dodgy heuristics that did that parsing at boot and remove the fields themselves since we now have a good replacement with the new OF parsing code. This patch also fixes a bunch of drivers to use the new code instead, so that at least pmac32, pseries, iseries and g5 defconfigs build. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Add support for "linux,usable-memory" on memory nodesMichael Ellerman2006-01-08
| | | | | | | | | | | | | 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: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Parse crashkernel= parameter in first kernelMichael Ellerman2006-01-08
| | | | | | | | | 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: Haren Myneni <haren@us.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Reroute interrupts from 0 + offset to PHYSICAL_START + offsetMichael Ellerman2006-01-08
| | | | | | | | | | | | 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: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Export a couple of prom functionsPaul Mackerras2005-11-14
| | | | | | These are needed by the TPM driver, apparently. Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge git://oak/home/sfr/kernels/iseries/workPaul Mackerras2005-11-09
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| * powerpc: remove some warnings when building iSeriesStephen Rothwell2005-11-09
| | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* | powerpc: Move some extern declarations from C code into headersPaul Mackerras2005-11-09
|/ | | | | | | This also make klimit have the same type on 32-bit as on 64-bit, namely unsigned long, and defines and initializes it in one place. Signed-off-by: Paul Mackerras <paulus@samba.org>
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