- Dec 24, 2007
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Stefan Roese authored
Right now TLB entry 0 ist used as UART0 mapping for the early debug output (via CONFIG_SERIAL_TEXT_DEBUG). This causes problems when many TLB's get used upon Linux bootup (e.g. while PCIe scanning behind bridges and/or switches on 440SPe platforms). This will overwrite the TLB 0 entry and further debug output's may crash/hang the system. This patch moves the early debug UART0 TLB entry from 0 to 62 as done in arch/powerpc. This way it is in the "pinned" area and will not get overwritten. Also the arch/ppc/mm/44x_mmu.c code is now synced with the newer code from arch/powerpc. Signed-off-by:
Stefan Roese <sr@denx.de> Signed-off-by:
Josh Boyer <jwboyer@linux.vnet.ibm.com>
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Josh Boyer authored
Update the Rainier wrapper for the libfdt merge and add the pci flags to the platform file. Signed-off-by: -
Josh Boyer authored
A small error caused a header file to be removed making sequoia support no longer compile. Fix it. Signed-off-by: -
Valentine Barshak authored
PowerPC 440Epx/GRx Sequoia/Rainier updates for 2.6.25 Signed-off-by:
Valentine Barshak <vbarshak@ru.mvista.com> Signed-off-by:
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Josh Boyer authored
The mechanism to do the setup for 440A cores changed recently. This fixes the 440grx setup function to call __fixup_440A_mcheck. Signed-off-by: -
Valentine Barshak authored
This adds PCI entry to PowerPC 440EPx Sequoia DTS. Signed-off-by:
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Valentine Barshak authored
Correct the PowerPC 440GRx machine check callback. Signed-off-by:
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Valentine Barshak authored
This is a UIC cascade handler rework to use set_irq_chained_handler() for cascade, just like othe ppc platforms do. With current implementation we have additional redirection for irq handler and we call generic_handle_irq twice (once for the primary uic and the other time for handling cascade interrupt). This causes Ingo's realtime support patch to stop working on 4xx. Not sure of any other possible problems though, but with set_irq_chained_handler() we can abolish "struct irqaction cascade" from the chip descriptor and call generic_handle_irq() once, directly for cascade irq. Signed-off-by:
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Valentine Barshak authored
This patch makes PowerPC 4xx UIC use generic level irq handler instead of a custom handle_uic_irq() function. We ack only edge irqs in mask_ack callback, since acking a level irq on UIC has no effect if the interrupt is still asserted by the device, even if the interrupt is already masked. So, to really de-assert the interrupt we need to de-assert the external source first *and* ack it on UIC then. The handle_level_irq() function masks and ack's the interrupt with mask_ack callback prior to calling the actual ISR and unmasks it at the end. So, to use it with UIC interrupts we need to ack level irqs in the unmask callback instead, after the ISR has de-asserted the external interrupt source. Even if we ack the interrupt that we didn't handle (unmask/ack it at the end of the handler, while next irq is already pending) it will not de-assert the irq, untill we de-assert its exteral source. Signed-off-by:
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Valentine Barshak authored
PowerPC 440GRx Rainier default config. Signed-off-by:
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Valentine Barshak authored
PowerPC 440GRx Rainier board support. Signed-off-by:
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Valentine Barshak authored
PowerPC 440GRx Rainier DTS. Signed-off-by:
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Valentine Barshak authored
Bootwrapper code for PowerPC 440GRx Rainier board. Signed-off-by:
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Valentine Barshak authored
Add the 440EPx Sequoia USB OHCI device tree entry. Signed-off-by:
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Stefan Roese authored
This patch adds runtime detection of the 440SPe revision A chips. These chips are equipped with a slighly different PCIe core and need special/ different initialization. The compatible node is changed to "plb-pciex-440spe" ("A" and "B" dropped). This is needed for boards that can be equipped with both PPC revisions like the AMCC Yucca. Signed-off-by:Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Benjamin Herrenschmidt authored
This makes 4xx embedded platforms re-assign all PCI resources as we pretty much never care about what the various firmwares have done on these, it's generally not compatible with the way the kernel will map the bridges. We still need to also enable bus renumbering on some of them, but I will do that from a separate patch after I've fixed 4xx PCIe to handle all bus numbers. Signed-off-by:
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Benjamin Herrenschmidt authored
This improves the way the 4xx PCI-E code handles checking for a link and adds explicit testing of CRS result codes on config space accesses. This should make it more reliable. Also, bridges with no link are now still created, though config space accesses beyond the root complex are filtered. This is one step toward eventually supporting hotplug. Signed-off-by:
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Benjamin Herrenschmidt authored
This removes a bogus empty "ranges" property in the EBC device node of the Bamboo board device-tree. The "ranges" property should be created by the wrapper code when it is implemented. Until then, remove the empty property since it incorrectly implies that there is a 1:1 address mapping between the EBC and the OPB. This also fixes a warning from newer DTCs. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds base support for the Katmai board, including PCI-X and PCI-Express (but no RTC, nvram, etc... yet). Signed-off-by:
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Benjamin Herrenschmidt authored
This reworks the boot wrapper library function that probes the chip clocks. Better separate the base function that is used on 440GX,SPe,EP,... from the uart fixups as those need different device-tree path on different processors. Also, rework the function itself based on the arch/ppc code from Eugene Surovegin which I find more readable, and which handles one more bypass case. Also handle the subtle difference between 440EP/EPx and 440SPe/GX, on the former, PerClk is derived from the PLB clock while on the later, it's derived from the OPB. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds macros to the boot wrapper to access the CPR registers from the boot wrappers. Signed-off-by:
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Benjamin Herrenschmidt authored
The 4xx bootwrapper occasionally needs to access SPR registers, this adds mfspr/mtspr wrappers to it. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds a function to the bootwrapper 4xx library to decode memory size on 440SPE processors. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds the definition of the on-chip OHCI controller to the Bamboo board's device-tree. This is enough to get it probed and working, though a separate patch fixing a bug in the OHCI driver is needed to make it reliable. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds the device-tree bits & call to ppc4xx_pci_find_bridges() to make PCI work on the Bamboo board Signed-off-by:
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Hugh Blemings authored
This patch adds base support for the AMCC Taishan 440GX evaluation board. Signed-off-by:
Hugh Blemings <hugh@blemings.org> Signed-off-by:
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Benjamin Herrenschmidt authored
This wires up the 4xx PCI support & device-tree bits for the 405GP based Walnut platform. Signed-off-by:
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Benjamin Herrenschmidt authored
Brings EP405 support to arch/powerpc. The IRQ routing for the CPLD comes from a device-tree property, PCI is working to the point where I can see the video card, USB device, and south bridge. This should work with both EP405 and EP405PC. I've not totally figured out how IRQs are wired on this hardware though, thus at this stage, expect only USB interrupts working, pretty much the same as what arch/ppc did. Also, the flash, nvram, rtc and temp control still have to be wired. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds some basic real mode based early udbg support for 40x in order to debug things more easily Signed-off-by:
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Benjamin Herrenschmidt authored
This wires up the 4xx PCI support & device tree bits for 440GP based Ebony platform. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds to the previous 2 patches the support for the 4xx PCI Express cells as found in the 440SPe revA, revB and 405EX. Unfortunately, due to significant differences between these, and other interesting "features" of those pieces of HW, the code isn't as simple as it is for PCI and PCI-X and some of the functions differ significantly between the 3 implementations. Thus, not only this code can only support those 3 implementations for now and will refuse to operate on any other, but there are added ifdef's to avoid the bloat of building a fairly large amount of code on platforms that don't need it. Also, this code currently only supports fully initializing root complex nodes, not endpoint. Some more code will have to be lifted from the arch/ppc implementation to add the endpoint support, though it's mostly differences in memory mapping, and the question on how to represent endpoint mode PCI in the device-tree is thus open. Many thanks to Stefan Roese for testing & fixing up the 405EX bits ! Signed-off-by:
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Benjamin Herrenschmidt authored
This adds to the previous patch the support for the 4xx PCI 2.x bridges. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds base support code for the 4xx PCI-X bridge. It also provides placeholders for the PCI and PCI-E version but they aren't supported with this patch. The bridges are configured based on device-tree properties. Signed-off-by:
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Benjamin Herrenschmidt authored
Accessing indirect DCRs is done via a pair of address/data DCRs. Such accesses are thus inherently racy, vs. interrupts, preemption and possibly SMP if 4xx SMP cores are ever used. This updates the mfdcri/mtdcri macros in dcr-native.h (which were so far unused) to use a spinlock. In addition, add some common definitions to a new dcr-regs.h file. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds a cputable function pointer for the CPU-side machine check handling. The semantic is still the same as the old one, the one in ppc_md. overrides the one in cputable, though ultimately we'll want to change that so the CPU gets first. This removes CONFIG_440A which was a problem for multiplatform kernels and instead fixes up the IVOR at runtime from a setup_cpu function. The "A" version of the machine check also tweaks the regs->trap value to differenciate the 2 versions at the C level. Signed-off-by:
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- Dec 21, 2007
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Paul Mackerras authored
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Stephen Rothwell authored
Maple and pasemi both require PCI as does CONFIG_OF_PLATFORM_PCI. The default setting of CONFIG_ISA_DMA_API is set to match the protection around the relevant routines in asm/dma.h. I also had to remove the PMAC platform from the combined build. The precis is that to build a 64 bit kernel with no PCI, you can only include pSeries and iSeries. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Stephen Rothwell authored
Fixes this warning: arch/powerpc/platforms/powermac/pci.c: In function 'u3_ht_cfg_access': arch/powerpc/platforms/powermac/pci.c:354: warning: return discards qualifiers from pointer target type arch/powerpc/platforms/powermac/pci.c:358: warning: return discards qualifiers from pointer target type Signed-off-by:
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Stephen Rothwell authored
This will allow us to declare const all the statically declared arrrays of these. Signed-off-by:
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Stephen Rothwell authored
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