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  1. 19 1月, 2011 4 次提交
  3. 30 12月, 2010 1 次提交
    • S
      of/flattree: Add Kconfig for EARLY_FLATTREE · e6ce1324
      由 Stephen Neuendorffer 提交于 
      The device tree code is now in two pieces: some which can be used generically
on any platform which selects CONFIG_OF_FLATTREE, and some early which is used
at boot time on only a few architectures.  This patch segregates the early
code so that only those architectures which care about it need compile it.
This also means that some of the requirements in the early code (such as
a cmd_line variable) that most architectures (e.g. X86) don't provide
can be ignored.
Signed-off-by: NStephen Neuendorffer <stephen.neuendorffer@xilinx.com>
[grant.likely@secretlab.ca: remove extra blank line addition]
[grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check]
[grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend
                            on OF_FLATTREE]
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
      e6ce1324
  5. 17 12月, 2010 2 次提交
  7. 30 10月, 2010 7 次提交
  9. 22 10月, 2010 1 次提交
  11. 18 10月, 2010 2 次提交
  13. 05 10月, 2010 2 次提交
  15. 20 9月, 2010 1 次提交
  17. 05 8月, 2010 5 次提交
  19. 27 7月, 2010 1 次提交
  21. 22 5月, 2010 1 次提交
  23. 01 5月, 2010 3 次提交
  25. 13 3月, 2010 1 次提交
  27. 27 2月, 2010 4 次提交
  29. 28 1月, 2010 1 次提交
  31. 17 12月, 2009 4 次提交
    • M
      MIPS: No longer hardwire CONFIG_EMBEDDED to y · a4609780
      由 Martin Michlmayr 提交于 
      There's no reason for MIPS to select EMBEDDED.  In fact, EMBEDDED makes
MIPS more awkward to deal with because it makes it different to the
majority of architectures for no good reason.

[Ralf: Historically disabling EMBEDDED had hid essential options for many
 MIPS platforms such as serial console and forced crap like VGA support
 or power managment enabled for platforms where those don't make any sense.

 The name of the option is also _very_ missleading so many users don't
 select it even where is was required for a functioning kernel.]
Signed-off-by: NMartin Michlmayr <tbm@cyrius.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/663/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      a4609780
    • R
      MIPS: eXcite: Remove platform. · de4148f3
      由 Ralf Baechle 提交于 
      The platform has never been fully merged 
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Cc: Thomas Koeller <thomas.koeller@baslerweb.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mtd@lists.infradead.org
Acked-by: NDavid Woodhouse <David.Woodhouse@intel.com>
Acked-by: NWim Van Sebroeck <wim@iguana.be>
      de4148f3
    • R
      MIPS: Move EARLY_PRINTK to Kconfig.debug · 4dd92e15
      由 Ralf Baechle 提交于 
      Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      4dd92e15
    • W
      MIPS: Tracing: Add function graph tracer support for MIPS · 29c5d346
      由 Wu Zhangjin 提交于 
      The implementation of function graph tracer for MIPS is a little
different from X86.

in MIPS, gcc(with -pg) only transfer the caller's return address(at) and
the _mcount's return address(ra) to us.

For the kernel part without -mlong-calls:

move at, ra
jal _mcount

For the module part with -mlong-calls:

lui v1, hi16bit_of_mcount
addiu v1, v1, low16bit_of_mcount
move at, ra
jal _mcount

Without -mlong-calls,

if the function is a leaf, it will not save the return address(ra):

ffffffff80101298 <au1k_wait>:
ffffffff80101298:       67bdfff0        daddiu  sp,sp,-16
ffffffff8010129c:       ffbe0008        sd      s8,8(sp)
ffffffff801012a0:       03a0f02d        move    s8,sp
ffffffff801012a4:       03e0082d        move    at,ra
ffffffff801012a8:       0c042930        jal     ffffffff8010a4c0 <_mcount>
ffffffff801012ac:       00020021        nop

so, we can hijack it directly in _mcount, but if the function is non-leaf, the
return address is saved in the stack.

ffffffff80133030 <copy_process>:
ffffffff80133030:       67bdff50        daddiu  sp,sp,-176
ffffffff80133034:       ffbe00a0        sd      s8,160(sp)
ffffffff80133038:       03a0f02d        move    s8,sp
ffffffff8013303c:       ffbf00a8        sd      ra,168(sp)
ffffffff80133040:       ffb70098        sd      s7,152(sp)
ffffffff80133044:       ffb60090        sd      s6,144(sp)
ffffffff80133048:       ffb50088        sd      s5,136(sp)
ffffffff8013304c:       ffb40080        sd      s4,128(sp)
ffffffff80133050:       ffb30078        sd      s3,120(sp)
ffffffff80133054:       ffb20070        sd      s2,112(sp)
ffffffff80133058:       ffb10068        sd      s1,104(sp)
ffffffff8013305c:       ffb00060        sd      s0,96(sp)
ffffffff80133060:       03e0082d        move    at,ra
ffffffff80133064:       0c042930        jal     ffffffff8010a4c0 <_mcount>
ffffffff80133068:       00020021        nop

but we can not get the exact stack address(which saved ra) directly in
_mcount, we need to search the content of at register in the stack space
or search the "s{d,w} ra, offset(sp)" instruction in the text. 'Cause we
can not prove there is only a match in the stack space, so, we search
the text instead.

as we can see, if the first instruction above "move at, ra" is not a
store instruction, there should be a leaf function, so we hijack the at
register directly via putting &return_to_handler into it, otherwise, we
search the "s{d,w} ra, offset(sp)" instruction to get the stack offset,
and then the stack address. we use the above copy_process() as an
example, we at last find "ffbf00a8", 0xa8 is the stack offset, we plus
it with s8(fp), that is the stack address, we hijack the content via
writing the &return_to_handler in.

If with -mlong-calls, since there are two more instructions above "move
at, ra", so, we can move the pointer to the position above "lui v1,
hi16bit_of_mcount".
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Nicholas Mc Guire <der.herr@hofr.at>
Cc: zhangfx@lemote.com
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/677/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
      29c5d346