Commit Graph

20 Commits

Author SHA1 Message Date
Pavel Kiryukhin
54fd6441e0 [MIPS] Fix use of smp_processor_id() in preemptible code.
Freeing prom memory: 956kb freed
Freeing firmware memory: 978944k freed
Freeing unused kernel memory: 180k freed
BUG: using smp_processor_id() in preemptible [00000000] code: swapper/1
caller is r4k_dma_cache_wback_inv+0x144/0x2a0
Call Trace:
 [<80117af8>] r4k_dma_cache_wback_inv+0x144/0x2a0
 [<802e4b84>] debug_smp_processor_id+0xd4/0xf0
 [<802e4b7c>] debug_smp_processor_id+0xcc/0xf0
...
CONFIG_DEBUG_PREEMPT is enabled.
--
Bug cause is blast_dcache_range() in preemptible code [in
r4k_dma_cache_wback_inv()].
blast_dcache_range() is constructed via __BUILD_BLAST_CACHE_RANGE that
uses cpu_dcache_line_size(). It uses current_cpu_data that use
smp_processor_id() in turn. In case of CONFIG_DEBUG_PREEMPT
smp_processor_id emits BUG if we are executing with preemption
enabled.

Cpu options of cpu0 are assumed to be the superset of all processors.

Can I make the same assumptions for cache line size  and fix this
issue the following way:

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-12-01 00:39:37 +00:00
Ralf Baechle
10cc352907 [MIPS] Allow hardwiring of the CPU type to a single type for optimization.
This saves a few k on systems which only ever ship with a single CPU type.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:15 +01:00
Ralf Baechle
641e97f318 [MIPS] Sibyte: Replace SB1 cachecode with standard R4000 class cache code.
It may not be perfect yet but the SB1 code is badly borken and has
horrible performance issues.

Downside: This seriously breaks support for pass 1 parts of the BCM1250
where indexed cacheops don't work quite reliable but I seem to be the
last one on the planet with a pass 1 part anyway.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:05 +01:00
Ralf Baechle
a36920200c [MIPS] Enable support for the userlocal hardware register
Which will cut down the cost of RDHWR $29 which is used to obtain the
TLS pointer and so far being emulated in software down to a single cycle
operation.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-10 17:33:02 +01:00
Atsushi Nemoto
53dc80287d [MIPS] FPU ownership management & preemption fixes
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-17 01:03:26 +00:00
Ralf Baechle
fc5d2d279f [MIPS] Use the proper technical term for naming some of the cache macros.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-13 21:26:04 +01:00
Chris Dearman
2e128dedcd [MIPS] Default cpu_has_mipsmt to a runtime check
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-13 21:25:58 +01:00
Ralf Baechle
f41ae0b2b9 [MIPS] Fix configuration of R2 CPU features and multithreading.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-06-29 21:10:51 +01:00
David Woodhouse
62c4f0a2d5 Don't include linux/config.h from anywhere else in include/
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-04-26 12:56:16 +01:00
Ralf Baechle
f088fc84f9 [MIPS] FPU affinity for MT ASE.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-19 04:14:28 +02:00
Atsushi Nemoto
de62893bc0 [MIPS] local_r4k_flush_cache_page fix
If dcache_size != icache_size or dcache_size != scache_size, or
set-associative cache, icache/scache does not flushed properly.  Make
blast_?cache_page_indexed() masks its index value correctly.  Also,
use physical address for physically indexed pcache/scache.
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-03-18 16:59:27 +00:00
Ralf Baechle
0401572a9b MIPS: Reorganize ISA constants strictly as bitmasks.
Signed-off-by: Ralf Baechle <ralf@ongar.mips.com>
2006-01-10 13:39:07 +00:00
Ralf Baechle
b4672d3729 MIPS: Introduce machinery for testing for MIPSxxR1/2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10 13:39:06 +00:00
Ralf Baechle
02cf211968 Cleanup the mess in cpu_cache_init.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:32:32 +01:00
Ralf Baechle
8f40611d2b Detect the MIPS R2 vectored interrupt, external interrupt controller
options and the precense of the MT ASE.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:51 +01:00
Ralf Baechle
02416dcf5a Redo RM9000 workaround which along with other DSP ASE changes was
causing some headache for debuggers knowing about signal frames.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:23 +01:00
Ralf Baechle
e50c0a8fa6 Support the MIPS32 / MIPS64 DSP ASE.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:17 +01:00
Ralf Baechle
4194318c39 Cleanup decoding of MIPSxx config registers.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:12 +01:00
Ralf Baechle
875d43e72b [PATCH] mips: clean up 32/64-bit configuration
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>
2005-09-05 00:06:06 -07:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
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!
2005-04-16 15:20:36 -07:00