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Some devices need to be ioremap'd and accessed very early in the boot
process. It is not possible to use the standard ioremap() function in
this case because that requires kmalloc()'ing some virtual address space
and kmalloc() may not be available so early in boot.
This patch provides fixmap mappings that allow physical address ranges
to be remapped into the kernel address space during the early boot
stages.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
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Presently the secondary CPU entry point is only aimed at 29bit phys mode,
causing it to point to a stray virtual address in 32bit mode. Fix it up
after consulting with our shiny new __in_29bit_mode().
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Valid sizes include 256kB, not 258kB.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This introduces some much overdue chainsawing of the fixed PMB support.
fixed PMB was introduced initially to work around the fact that dynamic
PMB mode was relatively broken, though they were never intended to
converge. The main areas where there are differences are whether the
system is booted in 29-bit mode or 32-bit mode, and whether legacy
mappings are to be preserved. Any system booting in true 32-bit mode will
not care about legacy mappings, so these are roughly decoupled.
Regardless of the entry point, PMB and 32BIT are directly related as far
as the kernel is concerned, so we also switch back to having one select
the other.
With legacy mappings iterated through and applied in the initialization
path it's now possible to finally merge the two implementations and
permit dynamic remapping overtop of remaining entries regardless of
whether boot mappings are crafted by hand or inherited from the boot
loader.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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The mass produced cuts use an updated PVR value, add them to the list.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This follows the x86 xstate changes and implements a task_xstate slab
cache that is dynamically sized to match one of hard FP/soft FP/FPU-less.
This also tidies up and consolidates some of the SH-2A/SH-4 FPU
fragmentation. Now fpu state restorers are commonly defined, with the
init_fpu()/fpu_init() mess reworked to follow the x86 convention.
The fpu_init() register initialization has been replaced by xstate setup
followed by writing out to hardware via the standard restore path.
As init_fpu() now performs a slab allocation a secondary lighterweight
restorer is also introduced for the context switch.
In the future the DSP state will be rolled in here, too.
More work remains for math emulation and the SH-5 FPU, which presently
uses its own special (UP-only) interfaces.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Presently this has a BUG_ON() for failure cases, as powerpc does. Switch
this over to a SLAB_PANIC instead.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Presently the thread_info allocators are special cased, depending on
THREAD_SHIFT < PAGE_SHIFT. This provides a sensible definition for them
regardless of configuration, in preparation for extended CPU state.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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start_thread() will become a bit heavier with the xstate freeing to be
added in, so move it out-of-line in preparation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This adds some VBR sanity checks in the sh_bios code to ensure that the
BIOS VBR is in range before blindly trapping in to it. This permits
boards with varying boot loader configurations to always leave support
for sh-bios enabled and it will just be disabled at run-time if not
found.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This splits out the unaligned access counters and userspace bits in to
their own generic interface, which will allow them to be wired up on sh64
too.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Now that the sh-sci earlyprintk is taken care of by the sh-sci driver
directly, there's no longer any reason for having a split-out
early_printk framework. sh_bios is the only other thing that uses it, so
we just migrate the leftovers in to there. As it's possible to have
multiple early_param()'s for the same string, there's not much point in
having this split out anymore anyways, particularly since the sh_bios
dependencies are still special-cased within sh-sci itself.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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sh_bios_char_out() is not used by anything in-tree these days, so just
get rid of it.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This was conditionalized on CONFIG_EARLY_PRINTK, which has subsequently
gone away. Now that the serial driver always supports the early console,
make sure we always establish the mapping.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This moves the VBR handling out of the main trap handling code and in to
the sh-bios helper code. A couple of accessors are added in order to
permit other kernel code to get at the VBR value for state save/restore
paths.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Nothing is using these now, so kill them all off.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This is the next big chunk of hw_breakpoint support. This decouples
the SH-4A support from the core and moves it out in to its own stub,
following many of the conventions established with the perf events
layering.
In addition to extending SH-4A support to encapsulate the remainder
of the UBC channels, clock framework support for handling the UBC
interface clock is added as well, allowing for dynamic clock gating.
This also fixes up a regression introduced by the SIGTRAP handling that
broke the ksym_tracer, to the extent that the current support works well
with all of the ksym_tracer/ptrace/kgdb. The kprobes singlestep code will
follow in turn.
With this in place, the remaining UBC variants (SH-2A and SH-4) can now
be trivially plugged in.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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SH-2A was referencing the old handler that no longer exists, fix it up.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This is the initial step for converting singlestep handling via ptrace
over to hw_breakpoints.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This kills off kgdb's breakpoint handler and ties in to the notifier
chain instead.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Presently the hw_breakpoint code is the primary notifier dispatch for
breakpoint traps, although it's only UBC traps that are of particular
interest there. This patches in a check to allow non-UBC generated
breakpoints to pass through down the remainder of the notifier chain,
giving things like kgdb a chance at getting notified.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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The event callback handling has been removed in favour of going through a
generic event handler to handle overflows. Follows the x86 change.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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We don't actually require this in the cpu_relax() polling case, so just
cuddle these around the sleeping version.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This fixes up some crashes with IRQs racing the need_resched() test under
QEMU.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Add dmaengine platform device to SH7785.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Add a dmaengine platform device to sh7724, fix DMA channel interrupt numbers.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (33 commits)
sh: Fix test of unsigned in se7722_irq_demux()
sh: mach-ecovec24: Add FSI sound support
sh: mach-ecovec24: Add mt9t112 camera support
sh: mach-ecovec24: Add tw9910 support
sh: MSIOF/mmc_spi platform data for the Ecovec24 board
sh: ms7724se: Add ak4642 support
sh: Fix up FPU build for SH5
sh: Remove old early serial console code V2
sh: sh5 scif pdata (sh5-101/sh5-103)
sh: sh4a scif pdata (sh7757/sh7763/sh7770/sh7780/sh7785/sh7786/x3)
sh: sh4a scif pdata (sh7343/sh7366/sh7722/sh7723/sh7724)
sh: sh4 scif pdata (sh7750/sh7760/sh4-202)
sh: sh3 scif pdata (sh7705/sh770x/sh7710/sh7720)
sh: sh2a scif pdata (sh7201/sh7203/sh7206/mxg)
sh: sh2 scif pdata (sh7616)
sh-sci: Extend sh-sci driver with early console V2
sh: Stub in P3 ioremap support for nommu parts.
sh: wire up vmallocinfo support in ioremap() implementations.
sh: Make the unaligned trap handler always obey notification levels.
sh: Couple kernel and user write page perm bits for CONFIG_X2TLB
...
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After the recent FPU optimisation commit the signature of save_fpu()
changed. "regs" wasn't used in the implementation of save_fpu() anyway.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Now when the sh-sci driver can do early serial output,
get rid of the old duplicated code. This patch is V2 and
removes support for "earlyprintk=serial" together with
the following kconfig options:
CONFIG_EARLY_SCIF_CONSOLE
CONFIG_EARLY_SCIF_CONSOLE_PORT
CONFIG_EARLY_PRINTK
With this patch applied "earlyprintk=" support is always
built-in the SuperH kernel. For this to work the serial
driver must have early platform support and in the case
of sh-sci the serial console needs to be enabled:
CONFIG_SERIAL_SH_SCI_CONSOLE=y
So after enabling the SuperH SCI console kconfig option
you also need to point out port using the kernel command
line: "earlyprintk=sh-sci.N[,baudrate][,keep]"
Remember that clocks may be disabled by the boot loader
so you may have to do some board specific static clock
setup before earlyprintk will work on your platform.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh5 scif serial port platform
data from a shared platform device to one platform
device per port. Also, move the serial port to the list
of early platform devices.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh4a scif serial port platform
data from a shared platform device to one platform
device per port. Also, add serial ports to the list of
early platform devices.
All sh4a except SuperH Mobile processors are modified by
this patch.
While at it, sh7757 gets early platform device support.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh4a scif serial port platform
data from a shared platform device to one platform
device per port. Also, add serial ports to the list of
early platform devices.
Only sh4a SuperH Mobile processors are modified by this
patch.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh4 scif serial port platform
data from a shared platform device to one platform
device per port. Also, add serial ports to the list of
early platform devices.
While at it, get rid of the R2D ifdef in the processor
code and adjust the defconfigs to use ttySC1.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh3 scif serial port platform
data from a shared platform device to one platform
device per port. Also, add serial ports to the list of
early platform devices.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh2a scif serial port platform
data from a shared platform device to one platform
device per port. Also, add serial ports to the list of
early platform devices.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch breaks out the sh2 scif serial port platform
data from a shared platform device to one platform
device per port. Also, add serial ports to the list of
early platform devices.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This is V2 of early serial console support for the sh-sci
driver. The early serial console is using early platform
devices and "earlyprintk". To use this feature the early
platform devices must be broken out to one device per port
and the desired port should be selected on the kernel command
line like: "earlyprintk=sh-sci.N[,baudrate][,keep]"
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
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Presently there are a couple of paths in to the alignment handler, where
only the address error path presently quiets the notificiation messages
based on the configuration settings. We carry over the notification level
tests to the default alignment handler itself incase so that they behave
uniformly.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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New helper - sys_mmap_pgoff(); switch syscalls to using it.
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The stub already existed in the _64 syscall table, but was lacking a
__NR_recvmmsg definition, while it was absent entirely for _32 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Syscall tracing metadata was shuffled around, update accordingly.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (137 commits)
sh: include empty zero page in romImage
sh: Make associative cache writes fatal on all SH-4A parts.
sh: Drop associative writes for SH-4 cache flushes.
sh: Partial revert of copy/clear_user_highpage() optimizations.
sh: Add default uImage rule for se7724, ap325rxa, and migor.
sh: allow runtime pm without suspend/resume callbacks
sh: mach-ecovec24: Remove un-defined settings for VPU
sh: mach-ecovec24: LCDC drive ability become high
sh: fix sh7724 VEU3F resource size
serial: sh-sci: Fix too early port disabling.
sh: pfc: pr_info() -> pr_debug() cleanups.
sh: pfc: Convert from ctrl_xxx() to __raw_xxx() I/O routines.
sh: Improve kfr2r09 serial port setup code
sh: Break out SuperH PFC code
sh: Move KEYSC header file
sh: convert /proc/cpu/aligmnent, /proc/cpu/kernel_alignment to seq_file
sh: Add CPG save/restore code for sh7724 R-standby
sh: Add SDHI power control support to Ecovec
mfd: Add power control platform data to SDHI driver
sh: mach-ecovec24: modify address map
...
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The macro container_of from kernel.h performs the same
pointer arithmetic operation.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
type T;
expression mptr;
expression member;
@@
- (void *)((char *)mptr - offsetof(T, member))
+ container_of(mptr, T, member)
// </smpl>
Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1815 commits)
mac80211: fix reorder buffer release
iwmc3200wifi: Enable wimax core through module parameter
iwmc3200wifi: Add wifi-wimax coexistence mode as a module parameter
iwmc3200wifi: Coex table command does not expect a response
iwmc3200wifi: Update wiwi priority table
iwlwifi: driver version track kernel version
iwlwifi: indicate uCode type when fail dump error/event log
iwl3945: remove duplicated event logging code
b43: fix two warnings
ipw2100: fix rebooting hang with driver loaded
cfg80211: indent regulatory messages with spaces
iwmc3200wifi: fix NULL pointer dereference in pmkid update
mac80211: Fix TX status reporting for injected data frames
ath9k: enable 2GHz band only if the device supports it
airo: Fix integer overflow warning
rt2x00: Fix padding bug on L2PAD devices.
WE: Fix set events not propagated
b43legacy: avoid PPC fault during resume
b43: avoid PPC fault during resume
tcp: fix a timewait refcnt race
...
Fix up conflicts due to sysctl cleanups (dead sysctl_check code and
CTL_UNNUMBERED removed) in
kernel/sysctl_check.c
net/ipv4/sysctl_net_ipv4.c
net/ipv6/addrconf.c
net/sctp/sysctl.c
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* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6: (43 commits)
security/tomoyo: Remove now unnecessary handling of security_sysctl.
security/tomoyo: Add a special case to handle accesses through the internal proc mount.
sysctl: Drop & in front of every proc_handler.
sysctl: Remove CTL_NONE and CTL_UNNUMBERED
sysctl: kill dead ctl_handler definitions.
sysctl: Remove the last of the generic binary sysctl support
sysctl net: Remove unused binary sysctl code
sysctl security/tomoyo: Don't look at ctl_name
sysctl arm: Remove binary sysctl support
sysctl x86: Remove dead binary sysctl support
sysctl sh: Remove dead binary sysctl support
sysctl powerpc: Remove dead binary sysctl support
sysctl ia64: Remove dead binary sysctl support
sysctl s390: Remove dead sysctl binary support
sysctl frv: Remove dead binary sysctl support
sysctl mips/lasat: Remove dead binary sysctl support
sysctl drivers: Remove dead binary sysctl support
sysctl crypto: Remove dead binary sysctl support
sysctl security/keys: Remove dead binary sysctl support
sysctl kernel: Remove binary sysctl logic
...
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Matt Fleming
Paul Mundt
Nobuhiro Iwamatsu
Guennadi Liakhovetski
Linus Torvalds
Magnus Damm
Thomas Gleixner
Al Viro
Nicolas Palix