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2017-08-16MIPS: DEC: Fix an int-handler.S CPU_DADDI_WORKAROUNDS regressionMaciej W. Rozycki
commit 68fe55680d0f3342969f49412fceabb90bdfadba upstream. Fix a commit 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") regression and remove assembly errors: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:162: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:163: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:229: Error: Macro used $at after ".set noat" arch/mips/dec/int-handler.S:230: Error: Macro used $at after ".set noat" triggering with with the CPU_DADDI_WORKAROUNDS option set and the DADDIU instruction. This is because with that option in place the instruction becomes a macro, which expands to an LI/DADDU (or actually ADDIU/DADDU) sequence that uses $at as a temporary register. With CPU_DADDI_WORKAROUNDS we only support `-msym32' compilation though, and this is already enforced in arch/mips/Makefile, so choose the 32-bit expansion variant for the supported configurations and then replace the 64-bit variant with #error just in case. Fixes: 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots") Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16893/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-29MIPS: DEC: Avoid la pseudo-instruction in delay slotsRalf Baechle
When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-04-03MIPS: Fix misspellings in comments.Adam Buchbinder
Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/12617/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-04-07MIPS: DEC: Implement FPU interrupt counterMaciej W. Rozycki
Implement a cheap way to count FPU interrupts for R2k/R3k DECstation systems. Do this manually in handcoded assembly, rather than calling `kstat_incr_irq_this_cpu' that would require setting up a stack frame and a lot of redirection. This is not going to be a problem because the FPU interrupt is local to the CPU and also there is one CPU only anyway. So at bootstrap determine the address of the correct location within `struct irq_desc', and then only refer to it directly in the interrupt handler. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9713/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-10-29DEC: Whitespace cleanupMaciej W. Rozycki
Commit 7034228792cc561e79ff8600f02884bd4c80e287 [MIPS: Whitespace cleanup.] did a lot of good and a little damage. Revert the damage. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5875/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-02-01MIPS: Whitespace cleanup.Ralf Baechle
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-08-03MIPS: Eleminate filenames from commentsRalf Baechle
They tend to get not updated when files are moved around or copied and lack any obvious use. While at it zap some only too obvious comments and as per Shinya's suggestion, add a copyright header to extable.c. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com> Acked-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
2007-02-13[MIPS] DECstation: Fix irq handlingAtsushi Nemoto
When I post a patch (commit f431baa55abf8adeed0c718b51deacbc151f58f1), I just tried to not change behavior of existing codes, but it seems dec/int-handler.S had been broken since its previous commit 937a801576f954bd030d7c4a5a94571710d87c0b. The caller of plat_irq_dispatch do setup/restore TI_REGS($28), so dec's plat_irq_dispatch should not do it, and there is no need to adjust RA. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-11-30[MIPS] do_IRQ cleanupAtsushi Nemoto
Now we have both function and macro version of do_IRQ() and the former is used only by DEC and non-preemptive kernel. This patch makes everyone use the macro version and removes the function version. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-09[MIPS] ret_from_irq adjustmentAtsushi Nemoto
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>
2006-10-08[MIPS] Complete fixes after removal of pt_regs argument to int handlers.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-04-19[MIPS] Rewrite all the assembler interrupt handlers to C.Ralf Baechle
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>
2006-04-19[MIPS] Rewrite spurious_interrupt from assembler to C.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29Use physical addresses at the interface level, letting drivers remapMaciej W. Rozycki
them as appropriate. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-09-05[PATCH] mips: clean up 32/64-bit configurationRalf Baechle
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>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
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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