linux.git/arch/powerpc/kernel/entry_32.S, branch v2.6.30

powerpc: Unify opcode definitions and support

2009-02-22T23:48:56+00:00

Create a new header that becomes a single location for defining PowerPC
opcodes used by code that is either generationg instructions
at runtime (fixups, debug, etc.), emulating instructions, or just
compiling instructions old assemblers don't know about.

We currently don't handle the floating point emulation or alignment decode
as both are better handled by the specific decode support they already
have.

Added support for the new dcbzl, dcbal, msgsnd, tlbilx, & wait instructions
since older assemblers don't know about them.

Signed-off-by: Kumar Gala 
Signed-off-by: Benjamin Herrenschmidt

powerpc32, ftrace: dynamic function graph tracer

2009-02-22T23:48:55+00:00

This patch gets function graph tracing working with dynamic function
tracer on PowerPC32.

Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Steven Rostedt 
Signed-off-by: Benjamin Herrenschmidt

powerpc32, ftrace: port function graph tracer to ppc32, static only

2009-02-22T23:48:55+00:00

This patch ports the function graph tracer for PowerPC, but only
for static function tracing.

Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Steven Rostedt 
Signed-off-by: Benjamin Herrenschmidt

powerpc32, ftrace: save and restore mcount regs with macro

2009-02-22T23:48:54+00:00

Impact: clean up

Use a macro to save and restore the registers for PowerPC32,
since that code is duplicated.

This is similar to the work done by Cyrill Gorcunov for the
mcount code in x86_64.

Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Steven Rostedt 
Signed-off-by: Benjamin Herrenschmidt

powerpc/book-3e: Introduce concept of Book-3e MMU

2009-02-12T22:51:33+00:00

The Power ISA 2.06 spec introduces a standard MMU programming model that
is based on the Freescale Book-E MMU programing model.  The Freescale
version is pretty backwards compatiable with the ISA 2.06 definition so
we are starting to refactor some of the Freescale code so it can be
easily shared.

Signed-off-by: Kumar Gala

powerpc: ftrace, do nothing in mcount call for dyn ftrace

2008-11-28T13:07:45+00:00

Impact: quicken mcount calls that are not replaced by dyn ftrace

Dynamic ftrace no longer does on the fly recording of mcount locations.
The mcount locations are now found at compile time. The mcount
function no longer needs to store registers and call a stub function.
It can now just simply return.

Since there are some functions that do not get converted to a nop
(.init sections and other code that may disappear), this patch should
help speed up that code.

Also, the stub for mcount on PowerPC 32 can not be a simple branch
link register like it is on PowerPC 64. According to the ABI specification:

"The _mcount routine is required to restore the link register from
 the stack so that the profiling code can be inserted transparently,
 whether or not the profiled function saves the link register itself."

This means that we must restore the link register that was used
to make the call to mcount.  The minimal mcount function for PPC32
ends up being:

 mcount:
        mflr    r0
        mtctr   r0
        lwz     r0, 4(r1)
        mtlr    r0
        bctr

Where we move the link register used to call mcount into the
ctr register, and then restore the link register from the stack.
Then we use the ctr register to jump back to the mcount caller.
The r0 register is free for us to use.

Signed-off-by: Steven Rostedt 
Signed-off-by: Ingo Molnar

ftrace: rename FTRACE to FUNCTION_TRACER

2008-10-20T16:27:03+00:00

Due to confusion between the ftrace infrastructure and the gcc profiling
tracer "ftrace", this patch renames the config options from FTRACE to
FUNCTION_TRACER.  The other two names that are offspring from FTRACE
DYNAMIC_FTRACE and FTRACE_MCOUNT_RECORD will stay the same.

This patch was generated mostly by script, and partially by hand.

Signed-off-by: Steven Rostedt 
Signed-off-by: Ingo Molnar

powerpc: Add TIF_NOTIFY_RESUME support for tracehook

2008-07-28T06:30:50+00:00

This adds TIF_NOTIFY_RESUME support for powerpc.  When set,
we call tracehook_notify_resume() on the way to user mode.
This overloads do_signal() to do the work, but changes its
arguments to it has the TIF_* bits handy in a register and
drops the useless first argument that was always zero.

Signed-off-by: Roland McGrath 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Make syscall tracing use tracehook.h helpers

2008-07-28T06:30:49+00:00

This changes powerpc syscall tracing to use the new tracehook.h entry
points.  There is no change, only cleanup.

In addition, the assembly changes allow do_syscall_trace_enter() to
abort the syscall without losing the information about the original
r0 value.

Signed-off-by: Roland McGrath 
Signed-off-by: Benjamin Herrenschmidt

powerpc/booke: Clean up the hardware watchpoint support

2008-07-28T06:30:47+00:00

* CONFIG_BOOKE is selected by CONFIG_44x so we dont need both
* Fixed a few comments
* Go back to only using DBCR0_IDM to determine if we are using
  debug resources.

Signed-off-by: Kumar Gala 
Signed-off-by: Benjamin Herrenschmidt