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2010-02-12sh: Isolate uncached mapping support.Paul Mundt1-1/+2
This splits out the uncached mapping support under its own config option, presently only used by 29-bit mode and 32-bit + PMB. This will make it possible to optionally add an uncached mapping on sh64 as well as booting without an uncached mapping for 32-bit. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-21sh: Track the uncached mapping size.Paul Mundt1-0/+1
This provides a variable for tracking the uncached mapping size, and uses it for pretty printing the uncached lowmem range. Beyond this, we'll also be building on top of this for figuring out from where the remainder of P2 becomes usable when constructing unrelated mappings. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-20sh: machine_ops based reboot support.Paul Mundt1-0/+1
This provides a machine_ops-based reboot interface loosely cloned from x86, and converts the native sh32 and sh64 cases over to it. Necessary both for tying in SMP support and also enabling platforms like SDK7786 to add support for their microcontroller-based power managers. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13Merge branches 'sh/xstate', 'sh/hw-breakpoints' and 'sh/stable-updates'Paul Mundt1-2/+0
2010-01-13sh: Don't perform an icbi on a P2 addressMatt Fleming1-1/+1
The legacy P2 area may not always be mapped (for example when using PMB). So perform an icbi on an address that we know will always be mapped. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-12-08Merge branch 'master' into sh/hw-breakpointsPaul Mundt1-4/+0
Conflict between FPU thread flag migration and debug thread flag addition. Conflicts: arch/sh/include/asm/thread_info.h arch/sh/include/asm/ubc.h arch/sh/kernel/process_32.c
2009-12-08sh: hw-breakpoints: Add preliminary support for SH-4A UBC.Paul Mundt1-2/+0
This adds preliminary support for the SH-4A UBC to the hw-breakpoints API. Presently only a single channel is implemented, and the ptrace interface still needs to be converted. This is the first step to cleaning up the long-standing UBC mess, making the UBC more generally accessible, and finally making it SMP safe. An additional abstraction will be layered on top of this as with the perf events code to permit the various CPU families to wire up support for their own specific UBCs, as many variations exist. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-11-12sh64: Fix up the CONFIG_GENERIC_BUG=n build.Paul Mundt1-4/+0
sh64 doesn't use GENERIC_BUG, which presently causes the handle_BUG() code to blow up. Fix up the dependencies and get it all building again. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-09-01sh: nmi_debug support.Paul Mundt1-1/+1
This implements support for NMI debugging that was shamelessly copied from the avr32 port. A bit of special magic is needed in the interrupt exception path given that the NMI exception handler is stubbed in to the regular exception handling table despite being reported in INTEVT. So we mangle the lookup and kick off an EXPEVT-style exception dispatch from the INTEVT path for exceptions that do_IRQ() has no chance of handling. As a result, we also drop the evt2irq() conversion from the do_IRQ() path and just do it in assembly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-09-01Merge branch 'master' into sh/smpPaul Mundt1-0/+5
Conflicts: arch/sh/mm/cache-sh4.c
2009-08-21sh: unwinder: Introduce UNWINDER_BUG() and UNWINDER_BUG_ON()Matt Fleming1-0/+5
We can't assume that if we execute the unwinder code and the unwinder was already running that it has faulted. Clearly two kernel threads can invoke the unwinder at the same time and may be running simultaneously. The previous approach used BUG() and BUG_ON() in the unwinder code to detect whether the unwinder was incapable of unwinding the stack, and that the next available unwinder should be used instead. A better approach is to explicitly invoke a trap handler to switch unwinders when the current unwinder cannot continue. Signed-off-by: Matt Fleming <matt@console-pimps.org>
2009-08-16sh: Fix up the SH-5 build with caches enabled.Paul Mundt1-13/+1
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-06-23sh: Provide cpu_idle_wait() to fix up cpuidle/SMP build.Paul Mundt1-0/+1
Crib the x86 cpu_idle_wait() implementation and shove it in with the idle code, subsequently enabling ARCH_HAS_CPU_IDLE_WAIT. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-04-02sh: Wire up ARCH_HAS_DEFAULT_IDLE for cpuidle.Paul Mundt1-0/+1
cpuidle wants ARCH_HAS_DEFAULT_IDLE defined in order to use the default idle loop. So, make it accessible and enable it for all sh machines. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-12-22sh: Generic kgdb stub support.Paul Mundt1-0/+2
This migrates from the old bitrotted kgdb stub implementation and moves to the generic stub. In the process support for SH-2/SH-2A is also added, which the old stub never provided. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-08sh: fixup many sparse errors.Paul Mundt1-2/+4
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-08sh: Provide movli.l/movco.l-based cmpxchg.Paul Mundt1-0/+2
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-29sh: migrate to arch/sh/include/Paul Mundt1-0/+190
This follows the sparc changes a439fe51a1f8eb087c22dd24d69cebae4a3addac. Most of the moving about was done with Sam's directions at: http://marc.info/?l=linux-sh&m=121724823706062&w=2 with subsequent hacking and fixups entirely my fault. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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