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* [POWERPC] QE: export qe_get_brg_clk()Anton Vorontsov2008-04-17
| | | | | | | qe_get_brg_clk() will be used by the fsl_gtm routines. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] QE: immap_qe.h should include asm/io.hAnton Vorontsov2008-04-17
| | | | | | | | | | | | | | | | | | Headers should include prototypes they use, otherwise build will break if we use it without explicitly including io.h: CC arch/powerpc/sysdev/qe_lib/gtm.o In file included from include/asm/qe.h:20, from arch/powerpc/sysdev/qe_lib/gtm.c:18: include/asm/immap_qe.h: In function ‘immrbar_virt_to_phys’: include/asm/immap_qe.h:480: error: implicit declaration of function ‘virt_to_phys’ make[2]: *** [arch/powerpc/sysdev/qe_lib/gtm.o] Error 1 make[1]: *** [arch/powerpc/sysdev/qe_lib] Error 2 gtm.c needs qe.h (which includes immap_qe.h) to use qe_get_brg_clk(). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] QE: implement qe_muram_offsetAnton Vorontsov2008-04-17
| | | | | | | | | | | qe_muram_offset is the reverse of the qe_muram_addr, will be used for the Freescale QE USB Host Controller driver. This patch also moves qe_muram_addr into the qe.h header, plus adds __iomem hints to use with sparse. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] fsl_lbc: implement few UPM routinesAnton Vorontsov2008-04-17
| | | | | | | | | | | | | Freescale UPM can be used to adjust localbus timings or to generate orbitrary, pre-programmed "patterns" on the external Localbus signals. This patch implements few routines so drivers could work with UPMs in safe and generic manner. So far there is just one user of these routines: Freescale UPM NAND driver. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] fsl_elbc_nand: factor out localbus definesAnton Vorontsov2008-04-17
| | | | | | | | | This is needed to support other localbus peripherals, such as NAND on FSL UPM. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] QE: UCC nodes cleanupAnton Vorontsov2008-04-17
| | | | | | | | | | | | - get rid of `model = "UCC"' in the ucc nodes It isn't used anywhere, so remove it. If we'll ever need something like this, we'll use compatible property instead. - replace last occurrences of device-id with cell-index. Drivers are modified for backward compatibility's sake. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] CPM: Move opcodes common to CPM1 and CPM2 to include/asm-powerpc/cpm.hLaurent Pinchart2008-04-17
| | | | | Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] CPM2: Reset the CPM when early debugging is not enabled.Laurent Pinchart2008-04-17
| | | | | | | | | | | Similarly to what is done for PQ1-based platforms, this patch resets the PQ2 Communication Processor Module in cpm2_reset() when early debugging is not enabled. This helps avoiding conflicts when the boot loader configured the CPM in an unexpected way. Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] ep8248e: Reference SMC parameter RAM base in the device tree.Laurent Pinchart2008-04-17
| | | | | | | | | | | | | | | | This patch modifies the Embedded Planet EP8248E device tree to reference the SMC paramater RAM base register instead of the parameter RAM allocated by the boot loader. The cpm_uart driver will allocate parameter RAM itself, making the serial port initialisation independent of the boot loader. The patch adds the parameter RAM allocated by the boot loader in the CPM muram node, making it available to the kernel. Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] cpm-serial: Relocate CPM buffer descriptors and SMC parameter ram.Laurent Pinchart2008-04-17
| | | | | | | | | | | This patch relocates the buffer descriptors and the SMC parameter RAM at the end of the first CPM muram chunk, as described in the device tree. This allows device trees to stop excluding SMC parameter ram allocated by the boot loader from the CPM muram node. Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] Add bootwrapper function to get virtual reg from the device tree.Laurent Pinchart2008-04-17
| | | | | | | | | | | | | | This patch adds a new generic device tree processing function that retrieves virtual reg addresses from the device tree to the bootwrapper code. It also updates the bootwrapper code to use the new function. dt_get_virtual_reg() retrieves the virtual reg addresses from the "virtual-reg" property. If the property can't be found, it uses the "reg" property and walks the tree to translate it to absolute addresses. Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] cpm_uart: Allocate DPRAM memory for SMC ports on CPM2-based platforms.Laurent Pinchart2008-04-17
| | | | | | | | | | | | | | | | | | | This patch allocates parameter RAM for SMC serial ports without relying on previous initialisation by a boot loader or a wrapper layer. SMC parameter RAM on CPM2-based platforms can be allocated anywhere in the general-purpose areas of the dual-port RAM. The current code relies on the boot loader to allocate a section of general-purpose CPM RAM and gets the section address from the device tree. This patch modifies the device tree address usage to reference the SMC parameter RAM base pointer instead of a pre-allocated RAM section and allocates memory from the CPM dual-port RAM when initialising the SMC port. CPM1-based platforms are not affected. Signed-off-by: Laurent Pinchart <laurentp@cse-semaphore.com> Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 85xx: Enable DMA engine on the MPC8544 DSSebastian Siewior2008-04-17
| | | | | | | | Add the device tree node for the DMA engine on 8544, publish the device and enable the driver in the defconfig. Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 83xx/85xx: Reorganize defconfigsKumar Gala2008-04-17
| | | | | | | | | | Board specific defconfigs are useful, however with the ability to do multi-board defconfigs they aren't needed in the top level configs directory Move the 83xx/85xx board specific defconfigs to individual directories under arch/powerpc/configs. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] Rework Book-E debug exception handlingKumar Gala2008-04-17
| | | | | | | | | | | | | | | | | | | | | The architecture allows for "Book-E" style debug interrupts to either go to critial interrupts of their own debug interrupt level. To allow for a dynamic kernel to support machines of either type we want to be able to compile in the interrupt handling code for both exception levels. Towards this goal we renamed the debug handling macros to specify the interrupt level in their name (DEBUG_CRIT_EXCEPTION/DebugCrit and DEBUG_DEBUG_EXCEPTION/DebugDebug). Additionally, on the Freescale Book-e parts we expanded the exception stacks to cover the maximum case of needing three exception stacks (normal, machine check and debug). There is some kernel text space optimization to be gained if a kernel is configured for a specific Freescale implementation but we aren't handling that now to allow for the single kernel image support. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] Remove unused machine call outsKumar Gala2008-04-16
| | | | | | | | | | | | When we moved to arch/powerpc we actively tried to avoid using the ppc_md.setup_io_mappings(). Currently no board ports use it so let's remove it to avoid any new boards using it. Also, remove early_serial_map() since we don't even have a call out for it in arch/powerpc. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Always add preferred consoles in platforms/pseries/lpar.cMichael Ellerman2008-04-16
| | | | | | | | | | | | | | | | | | | There is logic in platforms/peries/lpars.c which checks if the user has specified a console on the command line, and refrains from adding a preferred console entry for the hvc/hvsi console if they have. This trips up if you use "netconsole=foo" on the command line, and has the result that you get _only_ the netconsole, because the hvc device is never added as a preferred console. Worse still if you get the netconsole configuration wrong somehow, you end up with no console at all. As it turns out we don't need to worry about checking the command line. If the user has specified "console=foo", then foo will be set as the preferred console when the command line is parsed in start_kernel(), much later than the pseries code, and so the latter setting will take effect. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Move prototype for find_udbg_vterm() into a header fileMichael Ellerman2008-04-16
| | | | | | | | Move the prototype for find_udbg_vterm() into pseries.h, removing it from setup.c. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] pseries/phyp dump: Reserve a variable amount of space at bootManish Ahuja2008-04-16
| | | | | | | | | | | | | | | | | | | | | | This changes the way we calculate how much space to reserve for the pHyp dump. Currently we reserve 256MB only. With this change, the code first checks to see if an amount has been specified on the boot command line with the "phyp_dump_reserve_size" option, and if so, uses that much. Otherwise it computes 5% of total ram and rounds it down to a multiple of 256MB, and uses the larger of that or 256MB. This is for large systems with a lot of memory (10GB or more). The aim is to have more space available for the kernel on reboot on machines with more resources. Although the dump will be collected pretty fast and the memory released really early on allowing the machine to have the full memory available, this alleviates any issues that can be caused by having way too little memory on very very large systems during those few minutes. Signed-off-by: Manish Ahuja <mahuja@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Cleanup pgtable-ppc32.hKumar Gala2008-04-16
| | | | | | | | | | | * Removed defines KERNEL_PGD_PTRS & USER_PGD_PTRS since they aren't used anywhere * Changed pmd_page macro to use pfn_to_page so we get proper behavior if ARCH_PFN_OFFSET is set as well if we use a different memory model on ppc32. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] bootwrapper: Use physical address in PHDR for uImageKumar Gala2008-04-16
| | | | | | | | | | | | | | Now that we properly set the physical address in the program header of the vmlinux ELF we can extract it to properly set the load and entry point for u-boot uImages. Before we always hard coded the load & entry point to 0. However there are situations that the kernel may be built with a non-zero physical address. We use objdump to extract the PHDR. We assume that there is only one PHDR in the vmlinux of type LOAD. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Update linker script to properly set physical addressesKumar Gala2008-04-16
| | | | | | | | | | | | | | | We can set LOAD_OFFSET and use the AT attribute on sections and the linker will properly set the physical address of the LOAD program header for us. This allows us to know how the PHYSICAL_START the user configured a kernel with by just looking at the resulting vmlinux ELF. This is pretty much stolen from how x86 does things in their linker scripts. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Move phys_addr_t definition into asm/types.hKumar Gala2008-04-16
| | | | | | | | | | | | | | | | Moved phys_addr_t out of mmu-*.h and into asm/types.h so we can use it in places that before would have caused recursive includes. For example to use phys_addr_t in <asm/page.h> we would have included <asm/mmu.h> which would have possibly included <asm/mmu-hash64.h> which includes <asm/page.h>. Wheeee recursive include. CONFIG_PHYS_64BIT is a bit counterintuitive in light of ppc64 systems and thus the config option is only used for ppc32 systems with >32-bit physical addresses (44x, 85xx, 745x, etc.). Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Clean up some linker and symbol usageKumar Gala2008-04-16
| | | | | | | | | | * PAGE_OFFSET is not always the start of code, use _stext instead. * grab PAGE_SIZE and KERNELBASE from asm/page.h like ppc64 does. Makes the code a bit more common and provide a single place to manipulate the defines for things like kdump. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Rename __initial_memory_limit to __initial_memory_limit_addrKumar Gala2008-04-16
| | | | | | | | We always use __initial_memory_limit as an address so rename it to be clear. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Use lowmem_end_addr to limit lmb allocations on ppc32Kumar Gala2008-04-16
| | | | | | | | Now that we have a proper variable that is the address of the top of low memory we can use it to limit the lmb allocations. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] 85xx: Cleanup TLB initializationKumar Gala2008-04-16
| | | | | | | | | | | * Determine the RPN we are running the kernel at runtime rather than using compile time constant for initial TLB * Cleanup adjust_total_lowmem() to respect memstart_addr and be a bit more clear on variables that are sizes vs addresses. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Introduce lowmem_end_addr to distinguish from total_lowmemKumar Gala2008-04-16
| | | | | | | | | | | | | | total_lowmem represents the amount of low memory, not the physical address that low memory ends at. If the start of memory is at 0 it happens that total_lowmem can be used as both the size and the address that lowmem ends at (or more specifically one byte beyond the end). To make the code a bit more clear and deal with the case when the start of memory isn't at physical 0, we introduce lowmem_end_addr that represents one byte beyond the last physical address in the lowmem region. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Remove and replace uses of PPC_MEMSTART with memstart_addrKumar Gala2008-04-16
| | | | | | | | | | | | | | | | A number of users of PPC_MEMSTART (40x, ppc_mmu_32) can just always use 0 as we don't support booting these kernels at non-zero physical addresses since their exception vectors must be at 0 (or 0xfffx_xxxx). For the sub-arches that support relocatable interrupt vectors (book-e), it's reasonable to have memory start at a non-zero physical address. For those cases use the variable memstart_addr instead of the #define PPC_MEMSTART since the only uses of PPC_MEMSTART are for initialization and in the future we can set memstart_addr at runtime to have a relocatable kernel. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Provide access to arch/powerpc include path on ppc64Kumar Gala2008-04-16
| | | | | | | | There does not appear to be any reason that we shouldn't just have -Iarch/$(ARCH) on both ppc32 and ppc64 builds. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Remove Kconfig option BOOT_LOADKumar Gala2008-04-16
| | | | | | | Nothing appears to use BOOT_LOAD so remove it as a configurable option. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Add MODULE_LICENSE to powerpc/sysdev/rtc_cmos_setup.cAdrian Bunk2008-04-16
| | | | | | | This adds the missing MODULE_LICENSE("GPL"). Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Efika: Really, don't pretend to be CHRPDavid Woodhouse2008-04-16
| | | | | | | | | | | | | | | | | Fedora 9 works on Efika without the separate 'device-tree supplement', thanks to the kernel's own fixups. With one exception -- because 'CHRP' still appears on the 'machine:' line in /proc/cpuinfo, the installer misdetects the platform and misconfigures yaboot, putting it into a PReP boot partition instead of in the /boot filesystem where the Efika's firmware could find it. The kernel's fixups for Efika already correct one instance of 'chrp', in the 'device_type' property. This fixes it in the 'CODEGEN,description' property too, since that's what's exposed to userspace in /proc/cpuinfo. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] i2c: OF helpers for the i2c APIJochen Friedrich2008-04-16
| | | | | | | | | | This implements various helpers to support OF bindings for the i2c API. Signed-off-by: Jochen Friedrich <jochen@scram.de> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Implement support for the GPIO LIB APIAnton Vorontsov2008-04-16
| | | | | | | | | This implements support for the GPIO LIB API. Two calls are still unimplemented though: irq_to_gpio and gpio_to_irq. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] OF helpers for the GPIO APIAnton Vorontsov2008-04-16
| | | | | | | | | | | | | | | | | | | This implements various helpers to support OF bindings for the GPIO LIB API. Previously this was PowerPC specific, but it seems this code isn't arch-dependent anyhow, so let's place it into of/. SPARC will not see this addition yet, real hardware seem to not use GPIOs at all. But this might change: http://www.leox.org/docs/faq_MLleon.html "16-bit I/O port" sounds promising. :-) Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] properly declare onstack completion in iseries vethBenjamin Herrenschmidt2008-04-16
| | | | | | | | | | The iSeries veth driver uses an on-stack struct completion that it initializes using the COMPLETION_INITIALIZER instead of COMPLETION_INITIALIZER_ONSTACK macro, causing problems with lockdep. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fixup softirq preempt countBenjamin Herrenschmidt2008-04-16
| | | | | | | | | | | | | | | | | | This fixes the handling of the preempt count when switching interrupt stacks so that HW interrupt properly get the softirq mask copied over from the previous stack. It also initializes the softirq stack preempt_count to 0 instead of SOFTIRQ_OFFSET, like x86, as __do_softirq() does the increment, and we hit some lockdep checks if we have it twice. That means we do run for a little while off the softirq stack with the preempt-count set to 0, which could be deadly if we try to take a softirq at that point, however we do so with interrupts disabled, so I think we are ok. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Initialize paca->current earlierBenjamin Herrenschmidt2008-04-16
| | | | | | | | | | | | | | | Currently, we initialize the "current" pointer in the PACA (which is used by the "current" macro in the kernel) before calling setup_system(). That means that early_setup() is called with current still "NULL" which is -not- a good idea. It happens to work so far but breaks with lockdep when early code calls printk. This changes it so that all PACAs are statically initialized with __current pointing to the init task. For non-0 CPUs, this is fixed up before use. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] hvcbeat: Fix buffer manipulationIshizaki Kou2008-04-16
| | | | | | | | | | | | | | This fixes a potential bug at drivers/char/hvc_beat.c. - hvc_put_term_char routine will decrement "rest" variable twice, and forget to advance "buf" pointer by "nlen" bytes. This bug was not hit previously because the output handler in drivers/char/hvc_console.c splits given output into 16 bytes at maximum. Reported-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] celleb: Coding style cleanupIshizaki Kou2008-04-16
| | | | | | Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'for-2.6.26' of ↵Paul Mackerras2008-04-16
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/olof/pasemi
| * [POWERPC] kexec: MPIC ack interrupts at mpic_teardown_this_cpu()Valentine Barshak2008-04-07
| | | | | | | | | | | | | | | | | | We really need to ack interrupts at mpic_teardown, since not all platforms reset mpic at kernel start-up. For example, kexec'ed kernel hangs on P.A. Semi if mpic_eoi() isn't called. Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com> Signed-off-by: Olof Johansson <olof@lixom.net>
| * [POWERPC] pasemi: Minor iommu cleanupOlof Johansson2008-04-07
| | | | | | | | | | | | | | | | | | Clean up the pwrficient iommu code a bit. It was using u32 *-based offsets for registers, which can be a bit confusing when comparing to the manual. Generated binaries from the code is unchanged from before. Signed-off-by: Olof Johansson <olof@lixom.net>
| * pasemi_mac: Netpoll supportNate Case2008-04-07
| | | | | | | | | | | | | | | | Add netpoll support to allow use of netconsole. Signed-off-by: Nate Case <ncase@xes-inc.com> Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
| * pasemi_mac: Jumbo frame bugfixesOlof Johansson2008-04-07
| | | | | | | | | | | | | | | | Fix a couple of corner cases around interface up/down when jumbo frames are configured. Resources weren't always freed and reallocated properly. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
* | [POWERPC] 4xx: Add idle wait support for 44x platformsJerone Young2008-04-16
| | | | | | | | | | | | | | | | | | | | | | | | | | This changes the cpu_idle loop for 44x platforms to utilize the Wait Enable feature of the CPU. This helps virtulization solutions know when the guest Linux kernel is in an idle state. A command line option called "idle" is also added to allow people to change the idle loop back to the original variation. This is done by setting "idle=spin" on the kernel command line. Signed-off-by: Jerone Young <jyoung5@us.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* | [POWERPC] 4xx: Add ppc40x_defconfigJosh Boyer2008-04-16
| | | | | | | | | | | | Add a multi-board PowerPC 40x defconfig file Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* | [POWERPC] 4xx: Reorganize 4xx defconfigsJosh Boyer2008-04-15
| | | | | | | | | | | | | | | | | | | | Board specific defconfigs are useful, however with the ability to do multi-board defconfigs they aren't needed in the top level configs directory. Move the 4xx board specific defconfigs to individual directories under arch/powerpc/configs. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* | [LMB] Restructure allocation loops to avoid unsigned underflowPaul Mackerras2008-04-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a potential bug in __lmb_alloc_base where we subtract `size' from the base address of a reserved region without checking whether the subtraction could wrap around and produce a very large unsigned value. In fact it probably isn't possible to hit the bug in practice since it would only occur in the situation where we can't satisfy the allocation request and there is a reserved region starting at 0. This fixes the potential bug by breaking out of the loop when we get to the point where the base of the reserved region is less than the size requested. This also restructures the loop to be a bit easier to follow. The same logic got copied into lmb_alloc_nid_unreserved, so this makes a similar change there. Here the bug is more likely to be hit because the outer loop (in lmb_alloc_nid) goes through the memory regions in increasing order rather than decreasing order as __lmb_alloc_base does, and we are therefore more likely to hit the case where we are testing against a reserved region with a base address of 0. Signed-off-by: Paul Mackerras <paulus@samba.org>
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