On Thu, Jul 11, 2013 at 05:34:45PM -0700, Matt Helsley wrote:
On Thu, Jul 11, 2013 at 08:21:54PM +0800, Kevin Hao wrote:
By doing this we can make sure that the FPU state is only flushed to
the thread struct when it is really needed.
Signed-off-by: Kevin Hao haoke...@gmail.com
---
On Fri, Jul 12, 2013 at 06:37:13PM +1000, Benjamin Herrenschmidt wrote:
On Fri, 2013-07-12 at 13:36 +0800, Kevin Hao wrote:
+ /*
+* If we support a HW FPU, we need to ensure the FP state
+* if flushed into the thread_struct before attempting
+* emulation
+
v3:
Fix the typo in the comments of patch 1.
v2:
Tweak the patch 2 as suggested by Benjamin and Scott.
v1:
These two patches are for the emulation of the FPU unimplemented instructions.
The first is just a bit optimization for the FPU state flush.
The second is requested by Scott.
Kevin Hao
By doing this we can make sure that the FPU state is only flushed to
the thread struct when it is really needed.
Signed-off-by: Kevin Hao haoke...@gmail.com
---
v3: Fix the typo in the comments.
arch/powerpc/kernel/traps.c | 9 -
arch/powerpc/math-emu/math.c | 9 +
2 files
There are two invocations of do_mathemu() in traps.c. And the codes
in these two places are almost the same. Introduce a locale function
to eliminate the duplication. With this change we can also make sure
that in program_check_exception() the PPC_WARN_EMULATED is invoked for
the correctly
On Saturday 13 July 2013, Gerhard Sittig wrote:
[ MPC8308 knowledge required, see below ]
On Sat, Jul 13, 2013 at 09:17 +0200, Arnd Bergmann wrote:
On Friday 12 July 2013, Gerhard Sittig wrote:
+++ b/include/dt-bindings/dma/mpc512x-dma.h
@@ -0,0 +1,21 @@
+/*
+ * This header
All these patches passed the build test for the following configurations:
ppc40x_defconfig
ppc64e_defconfig
ppc64_defconfig
mpc85xx_defconfig
mpc85xx_smp_defconfig
corenet32_smp_defconfig
corenet64_smp_defconfig
ppc44x_defconfig
The only using of function disable_kernel_fp() was already dropped
in the commit 5daf9071 (powerpc: merge align.c).
Signed-off-by: Kevin Hao haoke...@gmail.com
---
arch/powerpc/include/asm/switch_to.h | 1 -
arch/powerpc/kernel/misc_64.S| 13 -
2 files changed, 14
In commit c6e6771b(powerpc: Introduce VSX thread_struct and CONFIG_VSX)
we add a invocation of flush_fp_to_thread() before copying the FPR or
VSR to users. But we already invoke the flush_fp_to_thread() in this
function. So remove one of them.
Signed-off-by: Kevin Hao haoke...@gmail.com
---
Instead of implementing an empty giveup_fpu() function for each
32bit processor type, replace them with an unique empty inline
function.
Signed-off-by: Kevin Hao haoke...@gmail.com
---
arch/powerpc/include/asm/switch_to.h | 3 ++-
arch/powerpc/kernel/head_40x.S | 8
In the current kernel, the function flush_fp_to_thread() is not
dependent on CONFIG_PPC_FPU. So most invocations of this function
is not wrapped by CONFIG_PPC_FPU. Even through we don't really
save the FPRs to the thread struct if CONFIG_PPC_FPU is not enabled,
but there does have some runtime
On 07/14/2013 10:50 AM, Arnd Bergmann wrote:
On Saturday 13 July 2013, Gerhard Sittig wrote:
[ MPC8308 knowledge required, see below ]
On Sat, Jul 13, 2013 at 09:17 +0200, Arnd Bergmann wrote:
On Friday 12 July 2013, Gerhard Sittig wrote:
+++ b/include/dt-bindings/dma/mpc512x-dma.h
@@ -0,0
On 07/12/2013 05:26 PM, Gerhard Sittig wrote:
[...]
]
+ if (mchan-tcd_nunits)
+ tcd-nbytes = mchan-tcd_nunits * 4;
+ else
+ tcd-nbytes = 64;
Just wondering where does the magic 64 come from?
On Sun, Jul 14, 2013 at 10:50 +0200, Arnd Bergmann wrote:
On Saturday 13 July 2013, Gerhard Sittig wrote:
[ ... ]
Thank you for the feedback.
OK, so not adding the dt-bindings header leads to no change in
the DTS nodes, which in turn collapses 5/8 into something local
to the
On Sun, Jul 14, 2013 at 12:05 +0200, Lars-Peter Clausen wrote:
On 07/12/2013 05:26 PM, Gerhard Sittig wrote:
[...]
]
+ if (mchan-tcd_nunits)
+ tcd-nbytes = mchan-tcd_nunits * 4;
+ else
+ tcd-nbytes = 64;
Just wondering where
The Kconfig symbol HOTPLUG was removed with commit 40b313608a (Finally
eradicate CONFIG_HOTPLUG). But there's still one select statement for
that symbol. It seems that select statement was added after the patch to
remove CONFIG_HOTPLUG was submitted. Anyhow, it is useless and can be
dropped.
this series
- introduces slave s/g support (that's support for DMA transfers which
involve peripherals in contrast to mem-to-mem transfers)
- adds device tree based lookup support for DMA channels
- combines floating patches and related feedback which already covered
several aspects of what
it's rather unexpected to have the MPC8308 specific code in the 'else'
branch so distant from the is MPC8308? check
concentrate the test and the specific code for MPC8308 in the 'if'
branch and handle MPC512x in the 'else' branch; use a symbolic channel
count which in combination with the
From: Alexander Popov a13xp0p0...@gmail.com
introduce support for slave s/g transfer preparation and the associated
device control callback in the MPC512x DMA controller driver, which adds
support for data transfers between memory and peripheral I/O to the
previously supported mem-to-mem
From: Lars-Peter Clausen l...@metafoo.de
This patch adds a new common OF dma xlate callback function which will match a
channel by it's id. The binding expects one integer argument which it will use
to
lookup the channel by the id.
Unlike of_dma_simple_xlate this function is able to handle a
QD HACK to enable SD card support without correct COMMON_CLK support,
best viewed with 'git diff -w -b', NOT acceptable for mainline (NAKed)
Signed-off-by: Gerhard Sittig g...@denx.de
---
drivers/mmc/host/mxcmmc.c | 41 +++--
1 file changed, 27
register the controller for device tree based lookup of DMA channels
(non-fatal for backwards compatibility with older device trees), provide
the '#dma-cells' property in the shared mpc5121.dtsi file, and introduce
a bindings document for the MPC512x DMA controller
Signed-off-by: Gerhard Sittig
On Sun, 2013-07-14 at 13:02 +0200, Paul Bolle wrote:
The Kconfig symbol HOTPLUG was removed with commit 40b313608a (Finally
eradicate CONFIG_HOTPLUG). But there's still one select statement for
that symbol. It seems that select statement was added after the patch to
remove CONFIG_HOTPLUG was
On Fri, 2013-07-12 at 04:38 -0700, JiveTalkin wrote:
Moderator..can you change the subject of this to Understanding register
usage as per ABI rules for functions ??
Additionally, doesn't anyone have anything to say about this?
We don't modify subjects after the fact. As to why nobody
On 07/13/2013 11:26 PM, Benjamin Herrenschmidt wrote:
On Sun, 2013-07-14 at 14:36 +1000, Michael Ellerman wrote:
Is this expected behaviour? It seems to be the same in current git
versions of kexec-tools.
On my system I see /proc/device-tree/memory.
If I modify add_usable_mem_property() to
On Sun, 2013-07-14 at 17:08 -0600, Chris Friesen wrote:
So for memory starting at 0 it should be memory@0
There are a fair number of dts files in the kernel tree that don't
specify an address for the memory node.
If the kernel accepts it without an address, it seems logical that kexec
We can access paca directly after hard interrupt disabled, and
this can avoid accessing wrong paca when using get_paca() in
preempt case.
Signed-off-by: Tiejun Chen tiejun.c...@windriver.com
---
arch/powerpc/include/asm/hw_irq.h |7 ---
1 file changed, 4 insertions(+), 3 deletions(-)
Remove the generic PPC_INDIRECT_IO and ensure we only add overhead
to the right accessors. IE. If only CONFIG_PPC_INDIRECT_PIO is set,
we don't add overhead to all MMIO accessors.
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
arch/powerpc/include/asm/io.h| 25
This includes walking the parent nodes if necessary.
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
arch/powerpc/include/asm/prom.h | 2 ++
arch/powerpc/kernel/prom.c | 26 ++
2 files changed, 28 insertions(+)
diff --git
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
arch/powerpc/include/asm/opal.h| 23 +++
arch/powerpc/platforms/powernv/opal-wrappers.S | 4
2 files changed, 27 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h
This uses the hooks provided by CONFIG_PPC_INDIRECT_PIO to
implement a set of hooks for IO port access to use the LPC
bus via OPAL calls for the first 64K of IO space
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
arch/powerpc/include/asm/io.h | 8 ++
The udbg_16550 code, which we use for our early consoles and debug
backends was fairly messy. Especially for the debug consoles, it
would re-implement the high level getc/putc/poll functions for
each access method. It also had code to configure the UART but only
for the straight MMIO method.
This
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
arch/powerpc/kernel/legacy_serial.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/legacy_serial.c
b/arch/powerpc/kernel/legacy_serial.c
index 5cf11b0..6f2a15c 100644
---
Some machines might provide the console via a different mechanism
such as direct access to a UART from Linux, in which case OPAL
might not expose any console. In that case, the code would cause
a NULL dereference.
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
Legacy UARTs can exist on PowerNV, memory-mapped ones on PCI
or IO based ones on the LPC bus.
Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
arch/powerpc/platforms/powernv/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/powernv/Kconfig
Module CRCs are implemented as absolute symbols that get resolved by
a linker script. We build an intermediate .o that contains an
unresolved symbol for each CRC. genksysms parses this .o, calculates
the CRCs and writes a linker script that resolves the symbols to
the calculated CRC.
Anton Blanchard an...@samba.org writes:
Module CRCs are implemented as absolute symbols that get resolved by
a linker script. We build an intermediate .o that contains an
unresolved symbol for each CRC. genksysms parses this .o, calculates
the CRCs and writes a linker script that resolves the
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