Current limitations:
1) On SMP single stepping has some fundamental issues,
shared with other sw single-step architectures such
as mips and arm.
2) On 32-bit sparc we don't support SMP kgdb yet. That
requires some reworking of the IPI mechanisms and
infrastructure on that platform.
Signed-off-by: David S. Miller <davem@davemloft.net>
Completely unused, and it just makes the SMP message
passing code on 32-bit sparc look more complex than
it is.
Signed-off-by: David S. Miller <davem@davemloft.net>
entry.S was a hodge-podge of several totally unrelated
sets of assembler routines, ranging from FPU trap handlers
to hypervisor call functions.
Split it up into topic-sized pieces.
Signed-off-by: David S. Miller <davem@davemloft.net>
Make ffb_init and ffb_exit static.
Remove unnecessary function prototype.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes a regression added by
238468b2ac ("[SPARC64]: Use trap type
stored in pt_regs to handle syscall restart.")
Because we now encode the "returning from syscall" status in the
pt_regs area, we have to be mindful to zap it out in the child
of a fork.
During a parallel kernel build I saw an accidental -EINTR return
from vfork() in 'make' because of this bug.
Signed-off-by: David S. Miller <davem@davemloft.net>
If we use this from more than one place, it's better to
have helpers instead of twiddling magic constants all
over.
Add pt_regs_trap_type(), pt_regs_clear_trap_type(), and
pt_regs_is_syscall().
Use them in do_signal().
Signed-off-by: David S. Miller <davem@davemloft.net>
Back around the same time we were bootstrapping the first 32-bit sparc
Linux kernel with a SunOS userland, we made the signal frame match
that of SunOS.
By the time we even started putting together a native Linux userland
for 32-bit Sparc we realized this layout wasn't sufficient for Linux's
needs.
Therefore we changed the layout, yet kept support for the old style
signal frame layout in there. The detection mechanism is that we had
sys_sigaction() start passing in a negative signal number to indicate
"new style signal frames please".
Anyways, no binaries exist in the world that use the old stuff. In
fact, I bet Jakub Jelinek and myself are the only two people who ever
had such binaries to be honest.
So let's get rid of this stuff.
I added an assertion using WARN_ON_ONCE() that makes sure 32-bit
applications are passing in that negative signal number still.
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix compile warning:
CC drivers/video/tcx.o
drivers/video/tcx.c: In function ‘tcx_init_one’:
drivers/video/tcx.c:477: warning: format ‘%lx’ expects type ‘long
unsigned int’, but argument 4 has type ‘resource_size_t’
This was the only sparc driver to use the resource directly in the
printk so I changed it to physbase like the other drivers.
Boot tested on SS4.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Remove all dependencies on EBUS and ISA bus layers, which we'd like to
remove as they are superfluous.
While we're here, add support for proper frequency changing on BBC
beep devices. Unlike the comments that were here, this device can
in fact use a programmable frequency.
Signed-off-by: David S. Miller <davem@davemloft.net>
I must have disabled this due to other bugs which were fixed over
time. And this is needed in order for child devices of "pmu"
to get proper resource values.
Signed-off-by: David S. Miller <davem@davemloft.net>
This never was enabled, I could never get it working, and if anyone
wants to try and get it's very easy to reference this code in the
history.
It's the only thing referencing the silly ISA device layer in the
sparc64 tree. OF device layer infrastructure is what should be used
for these things.
Signed-off-by: David S. Miller <davem@davemloft.net>
It's completely superfluous, CONFIG_COMPAT is sufficient.
What this used to be is an umbrella for enabling code shared
by all 32-bit compat binary support types. But with the
removal of SunOS and Solaris support, the only one left is
Linux 32-bit ELF.
Update defconfig.
Signed-off-by: David S. Miller <davem@davemloft.net>
Refer to chip as "SPARC" throughout.
Say 32-bit SPARC and 64-bit SPARC rather than mentioning specific
chips such like UltraSPARC, as appropriate.
Remove non-sense help text referring to things that will never appear
on a SPARC system, such as EISA busses etc.
Use "help" instead of "--help--"
Signed-off-by: David S. Miller <davem@davemloft.net>
Kernel bugzilla 10273
As reported by Jos van der Ende, ever since commit
5a606b72a4 ("[SPARC64]: Do not ACK an
INO if it is disabled or inprogress.") sun4u interrupts
can get stuck.
What this changset did was add the following conditional to
the various IRQ chip ->enable() handlers on sparc64:
if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
return;
which is correct, however it means that special care is needed
in the ->enable() method.
Specifically we must put the interrupt into IDLE state during
an enable, or else it might never be sent out again.
Setting the INO interrupt state to IDLE resets the state machine,
the interrupt input to the INO is retested by the hardware, and
if an interrupt is being signalled by the device, the INO
moves back into TRANSMIT state, and an interrupt vector is sent
to the cpu.
The two sun4v IRQ chip handlers were already doing this properly,
only sun4u got it wrong.
Signed-off-by: David S. Miller <davem@davemloft.net>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-bootmem-v3:
x86_64/mm: check and print vmemmap allocation continuous
x86_64: fix setup_node_bootmem to support big mem excluding with memmap
x86_64: make reserve_bootmem_generic() use new reserve_bootmem()
mm: allow reserve_bootmem() cross nodes
mm: offset align in alloc_bootmem()
mm: fix alloc_bootmem_core to use fast searching for all nodes
mm: make mem_map allocation continuous
David S. Miller
Robert Reif
Linus Torvalds