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* MIPS: Read watch registers with interrupts disabled.David Daney2009-01-301-1/+5
| | | | | | | | | | If a context switch occurred between the watch exception and reading the watch registers, it would be possible for the new process to corrupt their state. Enabling interrupts only after the watch registers are read avoids this race. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Override assembler target architecture for octeon.David Daney2009-01-111-0/+4
| | | | | | | | | Gas from binutils 2.19 fails to compile some cop1 instructions with -march=octeon. Since the cop1 instructions are present in mips1, use that arch instead. This will be fixed in binutils 2.20. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Watch exception handling for HARDWARE_WATCHPOINTS.David Daney2008-10-111-0/+4
| | | | | | | | Here we hook up the watch exception handler so that it sends SIGTRAP when the hardware watch registers are triggered. Signed-off-by: David Daney <ddaney@avtrex.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] SMTC: Fix SMTC dyntick support.Kevin D. Kissell2008-10-031-2/+2
| | | | | | | | | | | Rework of SMTC support to make it work with the new clock event system, allowing "tickless" operation, and to make it compatible with the use of the "wait_irqoff" idle loop. The new clocking scheme means that the previously optional IPI instant replay mechanism is now required, and has been made more robust. Signed-off-by: Kevin D. Kissell <kevink@paralogos.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix potential latency problem due to non-atomic cpu_wait.Atsushi Nemoto2008-09-211-0/+37
| | | | | | | | If an interrupt happened between checking of NEED_RESCHED and WAIT instruction, adjust EPC to restart from checking of NEED_RESCHED. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] R4000/R4400 daddiu erratum workaroundMaciej W. Rozycki2008-01-291-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This complements the generic R4000/R4400 errata workaround code and adds bits for the daddiu problem. In most places it just modifies handwritten assembly code so that the assembler is allowed to use a temporary register as daddiu may now be treated as a macro that expands to a sequence of li and daddu. It is the AT register or, where AT is unavailable or used explicitly for another purpose, an explicitly-named register is selected, using the .set at=<reg> feature added recently to gas. This feature is only used if CONFIG_CPU_DADDI_WORKAROUNDS has been set, so if the workaround remains disabled, the required version of binutils stays unchanged. Similarly, daddiu instructions put in branch delay slots in noreorder fragments are now taken out of them and the assembler is allowed to reorder them itself as possible (which it does making the whole idea of scheduling them into delay slots manually questionable). Also in the very few places where such a simple conversion was not possible, a handcoded longer sequence is implemented. Other than that there are changes to code responsible for building the TLB fault and page clear/copy handlers to avoid daddiu as appropriate. These are only effective if the erratum is verified to be present at the run time. Finally there is a trivial update to __delay(), because it uses daddiu in a branch delay slot. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix typo in R3000 TRACE_IRQFLAGS codeAtsushi Nemoto2007-11-151-1/+1
| | | | | Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] SMTC: Interrupt mask backstop hackKevin D. Kissell2007-07-121-0/+2
| | | | | | | | | | | To support multiple TC microthreads acting as "CPUs" within a VPE, VPE-wide interrupt mask bits must be specially manipulated during interrupt handling. To support legacy drivers and interrupt controller management code, SMTC has a "backstop" to track and if necessary restore the interrupt mask. This has some performance impact on interrupt service overhead. Disable it only if you know what you are doing. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] lockdep: Deal with interrupt disable hazard in TRACE_IRQFLAGSChris Dearman2007-03-291-0/+31
| | | | | | | | | | | Between the mtc0 or di instruction that disables interrupts and the following hazard barrier a processor may still take interrupts. If an interrupt is taken after interrupts are disabled but before the state is updated it will appear to restore_all that it is incorrectly returning with interrupts disabled. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Export except_vec_vi_{mori,lui,ori} as text symbols.Ralf Baechle2007-03-191-3/+3
| | | | | | Otherwise objdump will screw up disassembly. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] VI: TRACE_IRQS_OFF clobbers $v0, so save & restore around call.Ralf Baechle2007-03-191-0/+10
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fast path for rdhwr emulation for TLSAtsushi Nemoto2006-11-301-0/+63
| | | | | | | | Add special short path for emulationg RDHWR which is used to support TLS. Add an extra prologue for cpu_has_vtag_icache case. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] ret_from_irq adjustmentAtsushi Nemoto2006-10-091-5/+3
| | | | | | | | | | | Make sure that RA on top of interrupt stack is an address of ret_from_irq, so that dump_stack etc. can trace info interrupted context. Also this patch fixes except_vec_vi_handler and __smtc_ipi_vector which seems broken. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Complete fixes after removal of pt_regs argument to int handlers.Ralf Baechle2006-10-081-5/+10
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Stacktrace build-fix and improvementAtsushi Nemoto2006-10-011-4/+4
| | | | | | | | | | Fix build error due to stacktrace API change. Now save_stack_trace() tries to save all kernel context, including interrupts and exception. Also some asm code are changed a bit so that we can detect the end of current context easily. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] TRACE_IRQFLAGS_SUPPORT support.Ralf Baechle2006-07-131-0/+6
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Less noise on multithreading exceptions.Chris Dearman2006-07-131-1/+1
| | | | | | | | Make the MT handler silent and output the MT exception type at debug priority. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [MIPS] Fix use of ehb instruction for non-R2 configurations.Ralf Baechle2006-06-291-1/+1
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] MT: Improved multithreading support.Ralf Baechle2006-04-191-0/+29
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Rewrite all the assembler interrupt handlers to C.Ralf Baechle2006-04-191-0/+14
| | | | | | | | | | | | Saves like 1,600 lines of code, is way easier to debug, compilers frequently do a better job than the cut and paste type of handlers many boards had. And finally having all the stuff done in a single place also means alot of bug potencial for the MT ASE is gone. The only surviving handler in assembler is the DECstation one; I hope Maciej will rewrite it. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Remove stray .set mips3 resulting in 64-bit instruction in 32-bit ↵Ralf Baechle2006-02-071-1/+1
| | | | | | | | | kernels. Only the NMI handler was affected so this is a low impact bug. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Virtual SMP support for the 34K.Ralf Baechle2005-10-291-0/+1
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* More AP / SP bits for the 34K, the Malta bits and things. Still wantsRalf Baechle2005-10-291-0/+32
| | | | | | a little polishing. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Support the MIPS32 / MIPS64 DSP ASE.Ralf Baechle2005-10-291-0/+1
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Fix typos and formatting.Thiemo Seufer2005-10-291-5/+5
| | | | | Signed-off-by: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [PATCH] mips: fix build warningsYoichi Yuasa2005-09-051-2/+2
| | | | | | | | | | | | | | | | | | | This patch has fixed the following warnings. arch/mips/kernel/genex.S:250:5: warning: "CONFIG_64BIT" is not defined arch/mips/math-emu/cp1emu.c:1128:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:1206:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:1270:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:323:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:808:5: warning: "__mips64" is not defined arch/mips/math-emu/cp1emu.c:953:5: warning: "__mips64" is not defined arch/mips/mm/tlbex.c:519:5: warning: "CONFIG_64BIT" is not defined include/asm/reg.h:73:5: warning: "CONFIG_64BIT" is not defined Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mips: nuke trailing whitespaceRalf Baechle2005-09-051-2/+2
| | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mips: clean up 32/64-bit configurationRalf Baechle2005-09-051-5/+5
| | | | | | | | Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+302
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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