Commit Graph

52 Commits

Author SHA1 Message Date
Russell King
b876386ee4 [ARM SMP] Clear the exclusive monitor on ARMv6 CPUs on context switch
Ensure that the exclusive monitor is cleared on context switch with
ARMv6 CPUs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-08-10 14:52:52 +01:00
Dominik Brodowski
43c3473552 [PATCH] pci and yenta: pcibios_bus_to_resource
In yenta_socket, we default to using the resource setting of the CardBus
bridge.  However, this is a PCI-bus-centric view of resources and thus needs
to be converted to generic resources first.  Therefore, add a call to
pcibios_bus_to_resource() call in between.  This function is a mere wrapper on
x86 and friends, however on some others it already exists, is added in this
patch (alpha, arm, ppc, ppc64) or still needs to be provided (parisc -- where
is its pcibios_resource_to_bus() ?).

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-04 21:32:46 -07:00
Russell King
505d7b1931 [ARM SMP] Ensure secondary CPUs have a clean TLB
Since ARMv6 CPUs will not flush the TLB on context switches, it is
possible that we may end up with some global TLB entries remaining
present, eventually upsetting userspace.  Explicitly flush the
entire TLB on secondary CPUs as they startup, after we have switched
to the init_mm page tables.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-28 20:32:47 +01:00
Eric W. Biederman
59586e5a26 [PATCH] Don't export machine_restart, machine_halt, or machine_power_off.
machine_restart, machine_halt and machine_power_off are machine
specific hooks deep into the reboot logic, that modules
have no business messing with.  Usually code should be calling
kernel_restart, kernel_halt, kernel_power_off, or
emergency_restart. So don't export machine_restart,
machine_halt, and machine_power_off so we can catch buggy users.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-26 14:35:42 -07:00
Russell King
bd6f68af29 [PATCH] ARM SMP: Mark CPU init functions/data with __cpuinit/...data
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-17 21:35:41 +01:00
Russell King
109d89ca0e [PATCH] ARM: Allow register_undef_hook to be called with IRQs off
Preserve the interrupt status across a call to register_undef_hook.
This allows it to be called while interrupts are disabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-16 16:43:33 +01:00
Russell King
73eb7d9e8c [PATCH] ARM SMP: Initialise cpu_present_map
Rather than relying on the fixup code in init/main.c, explicitly
initialise cpu_present_map.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 19:42:58 +01:00
Russell King
e11b2236ea [PATCH] ARM SMP: We list IRQs for present CPUs, not online CPUs
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 19:26:31 +01:00
Russell King
d12734d14e [PATCH] ARM SMP: Rename cpu_present_mask to cpu_possible_map
The kernel's terminology for this is cpu_possible_map not
cpu_present_mask.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-11 17:38:36 +01:00
Todd Poynor
7bc7fc50ce [PATCH] ARM: 2791/1: Add CRCs for aliased ARM symbols
Patch from Todd Poynor

Fix module versioning for 3 ARM symbols that do not have CRCs added,
avoid "disagrees about version of symbol struct_module" errors at module
load time.  From David Singleton.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-06 23:06:05 +01:00
Russell King
f9bd6ea446 [PATCH] ARM: Change 'param_offset' to 'boot_params'
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-04 10:43:36 +01:00
Russell King
c77b042700 [PATCH] ARM: Make the magic values in head.S more obvious
Make the magic address values in head.S more obvious as to where
they came from.  Wrap all debug code in CONFIG_DEBUG_LL.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-07-01 11:56:55 +01:00
Russell King
cfb0810eab [PATCH] ARM: Don't try to send a signal to pid0
If we receive an unrecognised abort during boot, don't try to
send a signal to pid0, but instead report the current state.
This leads to less confusing debug reports.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-30 11:06:49 +01:00
Nicolas Pitre
c7e7887666 [PATCH] ARM: 2723/2: remove __udivdi3 and __umoddi3 from the kernel
Patch from Nicolas Pitre

Those are big, slow and generally not recommended for kernel code.
They are even not present on i386.  So it should be concluded that
one could as well get away with do_div() alone.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 18:10:54 +01:00
Catalin Marinas
aaaa3f9e51 [PATCH] ARM: 2769/1: cpu_init() stack setup fix
Patch from Catalin Marinas

The compiler allocates r14 for the stk variable in the __asm__ directive.
This is a shadowed register and gets changed when the mode is changed,
causing random values in the SP register. The patch adds a clobber for
the r14 register.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-29 15:34:39 +01:00
Russell King
4b0ef3b112 [PATCH] ARM SMP: Add IPI support code for SMP TLB flushing
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-28 13:49:16 +01:00
Russell King
2ea83398b7 [PATCH] ARM: Add VST idle loop call
This call allows the dynamic tick support to reprogram the timer
immediately before the CPU idles.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-27 14:04:05 +01:00
Andrew Morton
bdb94f3a78 [PATCH] arm: swsusp build fix
Another swsusp fixup.

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-26 08:43:19 -07:00
Russell King
8749af6821 [PATCH] ARM: Generic Dynamic Tick Timer support for ARM, take 4
This patch adds support for Dynamic Tick Timer for ARM. Dynamic Tick is
also known as VST (Variable Scheduling Timeouts).

Dynamic Tick has been in use in the OMAP tree since last October.  The
patch is not intrusive, and does not do anything unless CONFIG_NO_IDLE_HZ
is defined.  This patch has the following fixed based on comments from
RMK:
- Time is updated before calling interrupt handlers.
- Added new interrupt flag SA_TIMER to avoid duplicate timer interrupts
- Moved struct dyn_tick_timer to time.h until we at some point probably
  have an arch independent dyn-tick.h
- Cleaned up testing for DYN_TICK_ENABLED in irq.c

 I've cleaned up this patch to fix some remaining issues:
 - Call the timer tick handler with irqs disabled, as it would be from
   a normal interrupt
 - if we have a dyn_tick, we better implement all methods.
 - generic timer_dyn_reprogram() call, to be called before sleeping
 - added command line option - "dyntick=" to allow boot-time control
   of this feature
    -- rmk

Signed-off-by: Tony Lindgren
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-25 19:39:45 +01:00
Russell King
3a66941106 [PATCH] ARM: Ensure memory information is page aligned
Ensure that meminfo.bank[] array contains page-aligned start/size
information.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22 21:43:10 +01:00
Russell King
e00d349e77 [PATCH] ARM: Move signal return code into vector page
Move the signal return code into the vector page instead of placing
it on the user mode stack, which will allow us to avoid flushing
the instruction cache on signals, as well as eventually allowing
non-exec stack.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-22 20:26:05 +01:00
Linus Torvalds
1d345dac1f Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2005-06-20 16:00:33 -07:00
Yani Ioannou
ff381d2223 [PATCH] Driver Core: arch: update device attribute callbacks
Signed-off-by: Yani Ioannou <yani.ioannou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-20 15:15:32 -07:00
Russell King
34c8eacab6 [PATCH] ARM: Remove obsolete arch/arm/kernel/arch.c
This is not used anymore - RiscPC now contains the necessary
supporting code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 12:56:40 +01:00
Russell King
0908db22b1 [PATCH] ARM SMP: Messages about CPUs should be prefixed by CPU%u
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19 19:48:16 +01:00
Russell King
ea4423c3b6 Merge with ../linux-2.6-smp 2005-06-19 19:26:54 +01:00
Russell King
36c5ed23b9 [PATCH] ARM SMP: Fix PXA/SA11x0 suspend resume crash
We need to re-initialise the stack pointers for undefined, IRQ
and abort mode handlers whenever we resume.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-19 18:39:33 +01:00
Russell King
e65f38ed0b [PATCH] ARM SMP: Add support for startup of secondary processors
Create a temporary page table to startup secondary processors.  This
page table must have a 1:1 virtual/physical mapping for the kernel
in addition to the standard mappings to ensure that the secondary
CPU can enable its MMU safely.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-18 09:33:31 +01:00
Russell King
5ab6091db0 Merge with ../linux-2.6-smp 2005-06-18 09:06:59 +01:00
Nicolas Pitre
dcef1f6346 [PATCH] ARM: 2664/2: add support for atomic ops on pre-ARMv6 SMP systems
Patch from Nicolas Pitre

Not that there might be many of them on the planet, but at least RMK
apparently has one.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-08 19:00:47 +01:00
Russell King
ccea7a19e5 [PATCH] ARM SMP: Fix vector entry
The current vector entry system does not allow for SMP.  In
order to work around this, we need to eliminate our reliance
on the fixed save areas, which breaks the way we enable
alignment traps.  This patch changes the way we handle the
save areas such that we can have one per CPU.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-31 22:22:32 +01:00
Russell King
49f680ea7b [PATCH] ARM SMP: convert alignment enable
The current vector entry system does not allow for SMP.  In
order to work around this, we need to eliminate our reliance
on the fixed save areas, which breaks the way we enable
alignment traps.  This patch makes the alignment trap enable
code independent of the way we handle the save areas.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-31 18:02:00 +01:00
Russell King
791be9b976 [PATCH] ARM SMP: add IPI support
Add support for inter-processor interrupts to the main IRQ
handling code.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21 18:16:44 +01:00
Russell King
706fdd9faa [PATCH] ARM SMP: reallocate main IRQ handler code registers
By changing r9 -> r8 and r8 to 'tsk' (r9) we are able to remove
one instruction from the preempt path.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21 18:15:45 +01:00
Russell King
187a51ad11 [PATCH] ARM SMP: consolidate main IRQ handler code
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-21 18:14:44 +01:00
Nicolas Pitre
41e46d6ab0 [PATCH] ARM: 2665/1: kill warnings in entry-armv.S
Patch from Nicolas Pitre

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-05 23:24:45 +01:00
Nicolas Pitre
4b0e07a556 [PATCH] ARM: 2663/1: straightify TLS register emulation a bit more
Patch from Nicolas Pitre

This better express things, and should cover RMK's weird SMP toys.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-05-05 23:24:45 +01:00
Russell King
4f7a18124c [PATCH] ARM: Fix kernel stack offset calculations
Various places in the ARM kernel implicitly assumed that kernel
stacks are always 8K due to hard coded constants.  Replace these
constants with definitions.

Correct the allowable range of kernel stack pointer values within
the allocation.  Arrange for the entire kernel stack to be zeroed,
not just the upper 4K if CONFIG_DEBUG_STACK_USAGE is set.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-05 13:11:00 +01:00
Jesper Juhl
7ed20e1ad5 [PATCH] convert that currently tests _NSIG directly to use valid_signal()
Convert most of the current code that uses _NSIG directly to instead use
valid_signal().  This avoids gcc -W warnings and off-by-one errors.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:14 -07:00
Stephen Rothwell
7d87e14c23 [PATCH] consolidate sys_shmat
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:12 -07:00
Nicolas Pitre
2d2669b629 [PATCH] ARM: 2651/3: kernel helpers for NPTL support
Patch from Nicolas Pitre

This patch entirely reworks the kernel assistance for NPTL on ARM.
In particular this provides an efficient way to retrieve the TLS
value and perform atomic operations without any instruction emulation
nor special system call.  This even allows for pre ARMv6 binaries to
be forward compatible with SMP systems without any penalty.
The problematic and performance critical operations are performed
through segment of kernel provided user code reachable from user space
at a fixed address in kernel memory.  Those fixed entry points are
within the vector page so we basically get it for free as no extra
memory page is required and nothing else may be mapped at that
location anyway.
This is different from (but doesn't preclude) a full blown VDSO
implementation, however a VDSO would prevent some assembly tricks with
constants that allows for efficient branching to those code segments.
And since those code segments only use a few cycles before returning to
user code, the overhead of a VDSO far call would add a significant
overhead to such minimalistic operations.
The ARM_NR_set_tls syscall also changed number.  This is done for two
reasons:
1) this patch changes the way the TLS value was previously meant to be
   retrieved, therefore we ensure whatever library using the old way
   gets fixed (they only exist in private tree at the moment since the
   NPTL work is still progressing).
2) the previous number was allocated in a range causing an undefined
   instruction trap on kernels not supporting that syscall and it was
   determined that allocating it in a range returning -ENOSYS would be
   much nicer for libraries trying to determine if the feature is
   present or not.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-04-29 22:08:33 +01:00
Russell King
bce495d865 [PATCH] ARM: make entry*.S includes more logical
Move common includes to entry-header, and file specific includes
to the relevant file.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:21:02 +01:00
Russell King
f4dc9a4cf2 [PATCH] ARM: Remove single-use user save/restore macros
Assembly macros are pointless if they're only used once.  Move
them inline.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:20:34 +01:00
Russell King
cf88b417f9 [PATCH] ARM: remove PT_TRACESYS
PT_TRACESYS is unused, remove it.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:20:12 +01:00
Russell King
acaca3c915 [PATCH] ARM: Remove SVC_MODE definition
SVC_MODE reflects the MODE_SVC definition in asm/ptrace.h.  Use
the asm/ptrace.h definition instead, and remove SVC_MODE.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:19:48 +01:00
Russell King
e0f9f4a622 [PATCH] ARM: Use __NR_SYSCALL_BASE and __ARM_NR_BASE in asm code
Don't define our own local constants, but use those already defined
in asm/unistd.h instead.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:19:24 +01:00
Russell King
925c8a1a8c [PATCH] ARM: pt_regs offsets
Generate pt_regs S_xx offsets from the structure itself instead
of #defining them.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:18:59 +01:00
Russell King
1ec42c0c97 [PATCH] ARM: Remove argument for disable_irq/enable_irq
Since we do not require a register for these operations, we can
remove this unnecessary argument.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:18:26 +01:00
Russell King
7933523dc7 [PATCH] ARM: remove some entry initialisation asm code
Convert the trivial vector entry initialisation code to C code.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-04-26 15:17:42 +01:00
Hugh Dickins
6119be0bba [PATCH] freepgt: arm FIRST_USER_ADDRESS PAGE_SIZE
ARM define FIRST_USER_ADDRESS as PAGE_SIZE (beyond the machine vectors when
they are mapped low), and use that definition in place of locally defined
MIN_MAP_ADDR.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-19 13:29:21 -07:00