linux.git/arch/mips/kernel/setup.c, branch v2.6.25

Introduce flags for reserve_bootmem()

2008-02-07T16:42:25+00:00

This patchset adds a flags variable to reserve_bootmem() and uses the
BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
between crashkernel area and already used memory.

This patch:

Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
If that flag is set, the function returns with -EBUSY if the memory already
has been reserved in the past.  This is to avoid conflicts.

Because that code runs before SMP initialisation, there's no race condition
inside reserve_bootmem_core().

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: Bernhard Walle 
Cc: 
Cc: "Eric W. Biederman" 
Cc: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

arch/mips/: Spelling fixes

2008-02-03T14:54:53+00:00

Signed-off-by: Joe Perches 
Signed-off-by: Adrian Bunk

[MIPS] SMP: Call platform methods via ops structure.

2008-01-29T10:14:57+00:00

Signed-off-by: Ralf Baechle

[MIPS] R4000/R4400 errata workarounds

2008-01-29T10:14:54+00:00

 This is the gereric part of R4000/R4400 errata workarounds.  They include 
compiler and assembler support as well as some source code modifications 
to address the problems with some combinations of multiply/divide+shift 
instructions as well as the daddi and daddiu instructions.

 Changes included are as follows:

1. New Kconfig options to select workarounds by platforms as necessary.

2. Arch top-level Makefile to pass necessary options to the compiler; also 
   incompatible configurations are detected (-mno-sym32 unsupported as 
   horribly intrusive for little gain).

3. Bug detection updated and shuffled -- the multiply/divide+shift problem 
   is lethal enough that if not worked around it makes the kernel crash in 
   time_init() because of a division by zero; the daddiu erratum might 
   also trigger early potentially, though I have not observed it.  On the 
   other hand the daddi detection code requires the exception subsystem to 
   have been initialised (and is there mainly for information).

4. r4k_daddiu_bug() added so that the existence of the erratum can be 
   queried by code at the run time as necessary; useful for generated code 
   like TLB fault and copy/clear page handlers.

5. __udelay() updated as it uses multiplication in inline assembly.

 Note that -mdaddi requires modified toolchain (which has been maintained 
by myself and available from my site for ~4years now -- versions covered 
are GCC 2.95.4 - 4.1.2 and binutils from 2.13 onwards).  The -mfix-r4000 
and -mfix-r4400 have been standard for a while though.

Signed-off-by: Maciej W. Rozycki 
Signed-off-by: Ralf Baechle

[MIPS] Replace 40c7869b693b18412491fdcff64682215b739f9e kludge

2008-01-11T17:05:42+00:00

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] 64-bit Sibyte kernels need DMA32.

2007-11-26T17:26:14+00:00

Sibyte SOCs only have 32-bit PCI.  Due to the sparse use of the address
space only the first 1GB of memory is mapped at physical addresses
below 1GB.  If a system has more than 1GB of memory 32-bit DMA will
not be able to reach all of it.

For now this patch is good enough to keep Sibyte users happy but it seems
eventually something like swiotlb will be needed for Sibyte.

Signed-off-by: Ralf Baechle

[MIPS] ARC: Get rid of mips_machgroup

2007-10-11T22:46:08+00:00

This has not been any serious user of this ill conceived thing since the
original invention in like '95.

Signed-off-by: Ralf Baechle

[MIPS] Add some debugfs files to debug unaligned accesses

2007-07-10T16:33:04+00:00

Currently a number of unaligned instructions is counted but not used.
Add /debug/mips/unaligned_instructions file to show the value.

And add /debug/mips/unaligned_action to control behavior upon an
unaligned access.  Possible actions are:

0: silently fixup the unaligned access.
1: send SIGBUS.
2: dump registers, process name, etc. and fixup.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] Fix and cleanup the mess that a dozen prom_printf variants are.

2007-03-04T19:02:37+00:00

early_printk is a so much saner thing.

Signed-off-by: Ralf Baechle

[MIPS] Make some __setup functions static

2007-02-20T01:26:41+00:00

This fixes some sparse warnings. ("warning: symbol 'foo' was not
declared. Should it be static?")

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle