linux.git/arch/mips/kernel/setup.c, branch v3.14

MIPS: Fix start of free memory when using initrd

2013-10-29T20:24:23+00:00

Currently when using an initrd on a MIPS system the start of the bootmem
region of memory is set to the larger of the end of the kernel bss region
(_end) or the end of the initrd. In a typical memory layout where the
initrd is at some address above the kernel image this means that the start
of the bootmem region will be the end of the initrd. But when we are done
processing/loading the initrd we have no way to reclaim the memory region
it occupied, and we lose a large chunk of now otherwise empty RAM from our
final running system.

The bootmem code is designed to allow this initrd to be reserved (and the
code in finalize_initrd() currently does this). When the initrd is finally
processed/loaded its reserved memory is freed.

Fix the setting of the start of the bootmem map to be the end of the kernel.

[ralf@linux-mips.org: fold in the fix of Ashok Kumar .]

Signed-off-by: Greg Ungerer 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1574/
Cc: Ashok Kumar 
Patchwork: https://patchwork.linux-mips.org/patch/5883/
Patchwork: https://patchwork.linux-mips.org/patch/6028/
Patchwork: https://patchwork.linux-mips.org/patch/6064/
Signed-off-by: Ralf Baechle

MIPS: kexec: Fix random crashes while loading crashkernel

2013-09-05T18:53:43+00:00

Fixed compilation errors in case of non-KEXEC kernel
Rearranging code so that crashk_res gets updated.
- crashk_res is updated after mips_parse_crashkernel(),
   after resource_init(), which is after arch_mem_init().
- The reserved memory is actually treated as Usable memory,
   Unless we load the crash kernel, everything works.

Signed-off-by: Prem Mallappa 
Cc: linux-mips 
Patchwork: http://patchwork.linux-mips.org/patch/5805/
Signed-off-by: Ralf Baechle

MIPS: add detect_memory_region()

2013-05-07T23:19:11+00:00

Add a generic way of detecting the available RAM. This function is based on the
implementation already used by ath79.

Signed-off-by: John Crispin 
Patchwork: http://patchwork.linux-mips.org/patch/5178/

Merge branch 'mips-next-3.9' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next

2013-02-21T11:51:33+00:00

mips: reserve elfcorehdr

2013-02-19T08:36:23+00:00

/proc/vmcore wasn't showing up in kdump kernels.  It turns that that
for Octeon, the memory used by elfcorehdr wasn't being set aside
properly and it was getting clobbered before /proc/vmcore could get
it.  So reserve the memory if it shows up in a memory area managed
by the kernel.

Signed-off-by: Corey Minyard 
Acked-by: David Daney  
Cc: Ralf Baechle 
Patchwork: http://patchwork.linux-mips.org/patch/4936/

mips: Make sure kernel memory is in iomem

2013-02-19T08:36:15+00:00

Kernel memory isn't necessarily added to the memory tables, so it
wouldn't show up in /proc/iomem.  This was breaking kdump, which
requires these memory addresses to work correctly.

Signed-off-by: Corey Minyard 
Acked-by: David Daney 
Cc: Ralf Baechle 
Patchwork: http://patchwork.linux-mips.org/patch/4937/

MIPS: Whitespace cleanup.

2013-02-01T09:00:22+00:00

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

MIPS: kdump: Add support

2012-12-13T15:46:47+00:00

[ralf@linux-mips.org: Original patch by Maxim Uvarov 
with plenty of further shining, polishing, debugging and testing by me.]

Signed-off-by: Maxim Uvarov 
Cc: linux-mips@linux-mips.org
Cc: kexec@lists.infradead.org
Cc: horms@verge.net.au
Patchwork: https://patchwork.linux-mips.org/patch/1025/
Signed-off-by: Ralf Baechle

MIPS: Merge overlapping bootmem ranges

2012-11-23T17:44:37+00:00

Without this, we may end up with something like this in /proc/iomem:

01100000-014fffff : System RAM
  01100000-013bf48f : Kernel code
  013bf490-0149e01f : Kernel data
01500000-0c0fffff : System RAM

but the two System RAM ranges should be one single range.  This particular
case will result in kexec failure on Octeon systems if the kernel being
loaded by kexec is bigger than the already running kernel.

Signed-off-by: Ralf Baechle

MIPS: Move cache setup to setup_arch().

2012-05-16T21:34:34+00:00

commit 97ce2c88f9ad42e3c60a9beb9fca87abf3639faa (jump-label: initialize
jump-label subsystem much earlier) breaks MIPS.  The jump_label_init()
call was moved before trap_init() which is where we initialize
flush_icache_range().

In order to be good citizens, we move cache initialization earlier so
that we don't jump through a null flush_icache_range function pointer
when doing the jump label initialization.

Signed-off-by: David Daney 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3822/
Signed-off-by: Ralf Baechle