- 28 Mar, 2006 1 commit
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Kumar Gala authored
Towards the goal of having arch/powerpc not build anything over in arch/ppc move math-emu over. Also, killed some references to arch/ppc/ in the arch/powerpc Makefile which should belong in drivers/ when the particular sub-arch's move over to arch/powerpc. Signed-off-by:Kumar Gala <galak@kernel.crashing.org>
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- 27 Mar, 2006 39 commits
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Paul Mackerras authored
This fixes a mistake I made when editing these functions - when I took out the interrupt disabling code (because interrupts are now disabled by the caller) I left the register that is used for the MSR value to be used during doze/nap uninitialized. This fixes it. Also updated some of the comments in idle_power4.S and removed some code that was copied over from idle_6xx.S but is no longer relevant (we don't ever clear the CPU_FTR_CAN_NAP bit at runtime for POWER4). Signed-off-by:Paul Mackerras <paulus@samba.org>
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Paul Mackerras authored
On CHRP machines we are supposed to call into firmware (RTAS) periodically, to give it a chance to check for errors and other events. Under ppc we had some special code in timer_interrupt to do this, but that didn't get transferred over to arch/powerpc. Instead, we use an array of timer_list structs, one per CPU, and use add_timer_on to make sure each one gets called on the appropriate CPU. With this we can remove the heartbeat_* elements of the ppc_md struct. Signed-off-by: -
Paul Mackerras authored
__down, __down_interruptible and __up are defined and exported in arch/powerpc/kernel/semaphore.c, and used from there for ARCH=ppc, so there is no need to export them in arch/ppc/kernel/ppc_ksyms.c. Signed-off-by: -
Paul Mackerras authored
All of the things needed for 32-bit ARCH=powerpc builds have now moved to arch/powerpc/kernel, so we don't need to go down into arch/ppc/kernel any more, and we can remove the CONFIG_PPC_MERGE conditional from arch/ppc/kernel/Makefile. There were two files still referenced in the merge section of arch/ppc/kernel/Makefile: ppc-stub.o, depending on CONFIG_KGDB, and dma-mapping.o, depending on CONFIG_NOT_COHERENT_CACHE. None of the platforms currently in ARCH=powerpc have caches that aren't coherent with DMA, but when we do get one we'll move dma-mapping.c over. As for CONFIG_KGDB, none of the Kconfig files in the tree define it, so I'll let it languish for now. Signed-off-by: -
Paul Mackerras authored
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Paul Mackerras authored
... and rename it to module_32.c since it is the 32-bit version. The 32-bit and 64-bit ABIs are sufficiently different that having a merged version isn't really practical. Signed-off-by: -
Paul Mackerras authored
... and rename it to swsusp_32.S, since it's 32-bit only at this stage. Signed-off-by: -
Paul Mackerras authored
Also renamed temp.c to tau_6xx.c (for thermal assist unit) and updated the Kconfig option description and help text for CONFIG_TAU. Signed-off-by: -
Paul Mackerras authored
No functional changes, but call it l2cr_6xx.S since it is specific to 6xx-family (including G3/750 and G4/74xx) processors. Signed-off-by: -
Paul Mackerras authored
Since pSeries only wants to do something different in the idle loop when there is no work to do, we can simplify the code by implementing ppc_md.power_save functions instead of complete idle loops. There are two versions: one for shared-processor partitions and one for dedicated- processor partitions. With this we also do a cede_processor() call on dedicated processor partitions if the poll_pending() call indicates that the hypervisor has work it wants to do. Signed-off-by: -
Paul Mackerras authored
This unifies the 32-bit (ARCH=ppc and ARCH=powerpc) and 64-bit idle loops. It brings over the concept of having a ppc_md.power_save function from 32-bit to ARCH=powerpc, which lets us get rid of native_idle(). With this we will also be able to simplify the idle handling for pSeries and cell. Signed-off-by: -
Michael Neuling authored
I've been hitting a crash on boot where tty_open is being called before the hvc console driver setup is complete. This fixes the problem. Thanks to benh for his help on this. Signed-off-by:
Michael Neuling <mikey@neuling.org> Acked-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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Sylvain Munaut authored
ppc32: Reorganize and complete MPC52xx initial cpu setup This patch splits up the CPU setup into a generic part and a platform specific part. We also add a few missing init at the same time. Signed-off-by:
Sylvain Munaut <tnt@246tNt.com> Signed-off-by:
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Sylvain Munaut authored
ppc32: Adds support for the LITE5200B dev board This LITE5200B devboard is the new development board for the Freescale MPC5200 processor. It has two PCI slots and so a different PCI IRQ routing. Signed-off-by:
John Rigby <jrigby@freescale.com> Signed-off-by:
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Sylvain Munaut authored
ppc32: Adds support for the PCI hostbridge in MPC5200B Signed-off-by:
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Michael Neuling authored
We only ever execute the loop once, so let's move it to a function making it more readable. Cleanup patch, no functional change. Signed-off-by:
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Anton Blanchard authored
We ended up with an unused variable after the tty updates went in. Fix it. Signed-off-by:
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Anton Blanchard authored
We were printing node ids in hex in one spot. Lets be consistent and always print them in decimal. Signed-off-by:
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Anton Blanchard authored
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:
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Linas Vepstas authored
This avoids printk'ing a NULL string. Signed-off-by:
Linas Vepstas <linas@linas.org> Signed-off-by:
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Arnd Bergmann authored
If an SPE attempts a DMA put to a local store after already doing a get, the kernel must update the HW PTE to allow the write access. This case was not being handled correctly. From: Mike Kistler <mkistler@us.ibm.com> Signed-off-by:
Mike Kistler <mkistler@us.ibm.com> Signed-off-by:
Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by:
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Arnd Bergmann authored
I'm not sure where the information came from, but I assumed that doing cache-inhibited mappings for mmio regions was sufficient. It seems we also need the guarded bit set, like everyone else, which is the default for ioremap. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Arnd Bergmann authored
As noticed by Milton Miller, setting the initial affinity in spider-pic can go wrong if the target node field was not orinally empty. Signed-off-by:
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John Rose authored
Change the dynamic PCI probe function for pSeries to use ppc_md.pci_probe_mode() when appropriate. Signed-off-by:
John Rose <johnrose@austin.ibm.com> Signed-off-by:
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Olaf Hering authored
Do not call prom exit prom_panic. It clears the screen and the exit message is lost. On some (or all?) pmacs it causes another crash when OF tries to print the date and time in its banner. Set of_platform earlier to catch more prom_panic() calls. Signed-off-by:
Olaf Hering <olh@suse.de> Acked-by:
Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by:
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Andrew Morton authored
The return statement is to prevent `warning: 'nid' might be used uninitialized in this function'. Cc: Nathan Lynch <nathanl@austin.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Olaf Hering authored
The address of variable val in prom_init_stdout is passed to prom_getprop. prom_getprop casts the pointer to u32 and passes it to call_prom in the hope that OpenFirmware stores something there. But the pointer is truncated in the lower bits and the expected value is stored somewhere else. In my testing I had a stackpointer of 0x0023e6b4. val was at offset 120, wich has address 0x0023e72c. But the value passed to OF was 0x0023e728. c00000000040b710: 3b 01 00 78 addi r24,r1,120 ... c00000000040b754: 57 08 00 38 rlwinm r8,r24,0,0,28 ... c00000000040b784: 80 01 00 78 lwz r0,120(r1) ... c00000000040b798: 90 1b 00 0c stw r0,12(r27) ... The stackpointer came from 32bit code. The chain was yaboot -> zImage -> vmlinux PowerMac OpenFirmware does appearently not handle the ELF sections correctly. If yaboot was compiled in /usr/src/packages/BUILD/lilo-10.1.1/yaboot, then the stackpointer is unaligned. But the stackpointer is correct if yaboot is compiled in /tmp/yaboot. This bug triggered since 2.6.15, now prom_getprop is an inline function. gcc clears the lower bits, instead of just clearing the upper 32 bits. Signed-off-by:
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Dirk Herrendoerfer authored
the mfc member of a new context was not initialized to zero, which potentially leads to wild memory accesses. Signed-off-by:
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Mark Nutter authored
This patch is layered on top of CONFIG_SPARSEMEM and is patterned after direct mapping of LS. This patch allows mmap() of the following regions: "mfc", which represents the area from [0x3000 - 0x3fff]; "cntl", which represents the area from [0x4000 - 0x4fff]; "signal1" which begins at offset 0x14000; "signal2" which begins at offset 0x1c000. The signal1 & signal2 files may be mmap()'d by regular user processes. The cntl and mfc file, on the other hand, may only be accessed if the owning process has CAP_SYS_RAWIO, because they have the potential to confuse the kernel with regard to parallel access to the same files with regular file operations: the kernel always holds a spinlock when accessing registers in these areas to serialize them, which can not be guaranteed with user mmaps, Signed-off-by:
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Arnd Bergmann authored
This patch adds a new file called 'mfc' to each spufs directory. The file accepts DMA commands that are a subset of what would be legal DMA commands for problem state register access. Upon reading the file, a bitmask is returned with the completed tag groups set. The file is meant to be used from an abstraction in libspe that is added by a different patch. From the kernel perspective, this means a process can now offload a memory copy from or into an SPE local store without having to run code on the SPE itself. The transfer will only be performed while the SPE is owned by one thread that is waiting in the spu_run system call and the data will be transferred into that thread's address space, independent of which thread started the transfer. Signed-off-by:
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Arnd Bergmann authored
An SPU does not have a way to implement system calls itself, but it can create intercepts to the kernel. This patch uses the method defined by the JSRE interface for C99 host library calls from an SPU to implement Linux system calls. It uses the reserved SPU stop code 0x2104 for this, using the structure layout and syscall numbers for ppc64-linux. I'm still undecided wether it is better to have a list of allowed syscalls or a list of forbidden syscalls, since we can't allow an SPU to call all syscalls that are defined for ppc64-linux. This patch implements the easier choice of them, with a blacklist that only prevents an SPU from calling anything that interacts with its own execution, e.g fork, execve, clone, vfork, exit, spu_run and spu_create and everything that deals with signals. Signed-off-by:
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Arnd Bergmann authored
powerpc currently declares some of its own system calls in <asm/unistd.h>, but not all of them. That place also contains remainders of the now almost unused kernel syscall hack. - Add a new <asm/syscalls.h> with clean declarations - Include that file from every source that implements one of these - Get rid of old declarations in <asm/unistd.h> This patch is required as a base for implementing system calls from an SPU, but also makes sense as a general cleanup. Signed-off-by:
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Arnd Bergmann authored
Apparently we have found a bug in the CPU that causes external interrupts to sometimes get disabled indefinitely. This adds a workaround for the problem. Signed-off-by:
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Jens Osterkamp authored
The current interrupt controller setup on Cell is done in a rather ad-hoc way with device tree properties that are not standardized at all. In an attempt to do something that follows the OF standard (or at least the IBM extensions to it) more closely, we have now come up with this patch. It still provides a fallback to the old behaviour when we find older firmware, that hack can not be removed until the existing customer installations have upgraded. Cc: hpenner@de.ibm.com Cc: stk@de.ibm.com Cc: Segher Boessenkool <segher@kernel.crashing.org> Cc: Milton Miller <miltonm@bga.com> Cc: benh@kernel.crashing.org Signed-off-by:
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Arnd Bergmann authored
The default configuration in mainline got a little out of sync with what we use internally. Signed-off-by:
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Arnd Bergmann authored
A small bug crept in the iommu driver when we made it more generic. This patch is needed for boards that have a dma window that does not start at bus address zero. Signed-off-by:
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Michael Ellerman authored
So that we can use firmware_has_feature() in a BUG_ON() and have the compiler elide the code entirely if the feature can never be set, change firmware_has_feature to a macro. Unfortunate, but necessary at least until GCC bug #26724 is fixed. Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
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Michael Ellerman authored
Change BUG_ON and WARN_ON to give the compiler a chance to perform compile-time optimsations. Depending on the complexity of the condition, the compiler may not do this very well, so if it's important check the object code. Current GCC's (4.x) produce good code as long as the condition does not include a function call, including a static inline. Signed-off-by:
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Stephen Rothwell authored
Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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