06 Sep, 2005
2 commits
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Consolidate the early console and PPCDBG code in udbg.c
Signed-off-by: Milton Miller
Signed-off-by: Anton Blanchard
Signed-off-by: Paul Mackerras -
Take udbg out of ppc_md. Allows us to not overwrite early udbg inits
when assigning ppc_md.Signed-off-by: Milton Miller
Signed-off-by: Anton Blanchard
Signed-off-by: Paul Mackerras
05 Sep, 2005
4 commits
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We need to indicate to the hypervisor that it needs to save our VMX
registers when switching partitions on a shared-processor system, just as
it needs to for FP and PMC registers.This could be made to be on-demand when VMX is used, but we don't do that
for FP nor PMC right now either so let's not overcomplicate things.Signed-off-by: Olof Johansson
Acked-by: Paul Mackerras
Cc: Anton Blanchard
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is used only in slab.c and each architecture gets to define whcih
underlying type is to be used.Seems a bit silly - move it to slab.c and use the same type for all
architectures: unsigned int.Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Someone mentioned that almost all the architectures used basically the same
implementation of get_order. This patch consolidates them into
asm-generic/page.h and includes that in the appropriate places. The
exceptions are ia64 and ppc which have their own (presumably optimised)
versions.Signed-off-by: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A new option for SPARSEMEM is ARCH_SPARSEMEM_EXTREME. Architecture
platforms with a very sparse physical address space would likely want to
select this option. For those architecture platforms that don't select the
option, the code generated is equivalent to SPARSEMEM currently in -mm.
I'll be posting a patch on ia64 ml which uses this new SPARSEMEM feature.ARCH_SPARSEMEM_EXTREME makes mem_section a one dimensional array of
pointers to mem_sections. This two level layout scheme is able to achieve
smaller memory requirements for SPARSEMEM with the tradeoff of an
additional shift and load when fetching the memory section. The current
SPARSEMEM -mm implementation is a one dimensional array of mem_sections
which is the default SPARSEMEM configuration. The patch attempts isolates
the implementation details of the physical layout of the sparsemem section
array.ARCH_SPARSEMEM_EXTREME depends on 64BIT and is by default boolean false.
I've boot tested under aim load ia64 configured for ARCH_SPARSEMEM_EXTREME.
I've also boot tested a 4 way Opteron machine with !ARCH_SPARSEMEM_EXTREME
and tested with aim.Signed-off-by: Andy Whitcroft
Signed-off-by: Bob Picco
Signed-off-by: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Aug, 2005
12 commits
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While ppc64 has the CONFIG_HZ Kconfig option, it wasnt actually being
used. Connect it up and set all platforms to 250Hz.Signed-off-by: Anton Blanchard
Signed-off-by: Paul Mackerras -
Here's the 970MP's PVR (processor version register) entry for oprofile.
Signed-off-by: Jake Moilanen
Signed-off-by: Paul Mackerras -
They differed in either simple comments or in the protecting ifdefs.
Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Move the identical files from include/asm-ppc{,64}/ to
include/asm-powerpc/. Remove hdreg.h completely as it is unused in
the tree.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
The ppc and ppc64 trees are hopefully going to merge over time, so this
patch begins the process by creating a place for the merging of the
header files.Create include/asm-powerpc (and move linkage.h into it from
asm-{ppc,ppc64} since we don't like empty directories). Modify the
ppc and ppc64 Makefiles to cope.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Make MODULE_DEVICE_TABLE work for vio devices.
Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Create vio_bus_ops so that we just pass a structure to vio_bus_init
instead of three separate function pointers.Rearrange vio.h to avoid forward references. vio.h only needs
struct device_node from prom.h so remove the include and just
declare it.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Take some assignments out of vio_register_device_common and
rename it to vio_register_device.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
With CONFIG_HUGETLB_PAGE=n:
In file included from kernel/sysctl.c:37:
include/linux/hugetlb.h:104:1: warning: "hugetlb_free_pgd_range" redefined
In file included from include/linux/mm.h:36,
from kernel/sysctl.c:23:
include/asm/pgtable.h:492:1: warning: this is the location of the previous definitionSigned-off-by: Andrew Morton
Signed-off-by: David Gibson
Signed-off-by: Paul Mackerras -
Allows overriding of sysctl_{wmem,rmrm}_max
Signed-off-by: Patrick McHardy
Signed-off-by: David S. Miller
29 Aug, 2005
22 commits
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Paulus, I think this is now a reasonable candidate for the post-2.6.13
queue.Relax address restrictions for hugepages on ppc64
Presently, 64-bit applications on ppc64 may only use hugepages in the
address region from 1-1.5T. Furthermore, if hugepages are enabled in
the kernel config, they may only use hugepages and never normal pages
in this area. This patch relaxes this restriction, allowing any
address to be used with hugepages, but with a 1TB granularity. That
is if you map a hugepage anywhere in the region 1TB-2TB, that entire
area will be reserved exclusively for hugepages for the remainder of
the process's lifetime. This works analagously to hugepages in 32-bit
applications, where hugepages can be mapped anywhere, but with 256MB
(mmu segment) granularity.This patch applies on top of the four level pagetable patch
(http://patchwork.ozlabs.org/linuxppc64/patch?id=1936).Signed-off-by: David Gibson
Signed-off-by: Paul Mackerras -
This patch moves power4_enable_pmcs() to arch/ppc64/kernel/pmc.c.
I've tested it on P5 LPAR and P4. It does what it used to.
Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
If both CONFIG_XMON and CONFIG_XMON_DEFAULT is enabled in the .config,
there is no way to disable xmon again. setup_system calls first xmon_init,
later parse_early_param. So a new 'xmon=off' cmdline option will do the right
thing.Signed-off-by: Olaf Hering
Signed-off-by: Paul Mackerras -
We can now remove CONFIG_MSCHUNKS as it doesn't do anything interesting
anymore.The only macro in abs_addr.h which is called by non-iSeries code is
phys_to_abs(), so remove the other dummy implementations, and we add a
firmware feature check to phys_to_abs().Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
We no longer need the lmb code to know about abs and phys addresses, so
remove the physbase variable from the lmb_property struct.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
abs_to_phys() is a macro that turns out to do nothing, and also has the
unfortunate property that it's not the inverse of phys_to_abs() on iSeries.The following is for my benefit as much as everyone else.
With CONFIG_MSCHUNKS enabled, the lmb code is changed such that it keeps
a physbase variable for each lmb region. This is used to take the possibly
discontiguous lmb regions and present them as a contiguous address space
beginning from zero.In this context each lmb region's base address is its "absolute" base
address, and its physbase is it's "physical" address (from Linux's point of
view). The abs_to_phys() macro does the mapping from "absolute" to "physical".Note: This is not related to the iSeries mapping of physical to absolute
(ie. Hypervisor) addresses which is maintained with the msChunks structure.
And the msChunks structure is not controlled via CONFIG_MSCHUNKS.Once upon a time you could compile for non-iSeries with CONFIG_MSCHUNKS
enabled. But these days CONFIG_MSCHUNKS depends on CONFIG_PPC_ISERIES, so
for non-iSeries code abs_to_phys() is a no-op.On iSeries we always have one lmb region which spans from 0 to
systemcfg->physicalMemorySize (arch/ppc64/kernel/iSeries_setup.c line 383).
This region has a base (ie. absolute) address of 0, and a physbase address
of 0 (as calculated in lmb_analyze() (arch/ppc64/kernel/lmb.c line 144)).On iSeries, abs_to_phys(aa) is defined as lmb_abs_to_phys(aa), which finds
the lmb region containing aa (and there's only one, ie. 0), and then does:return lmb.memory.region[0].physbase + (aa - lmb.memory.region[0].base)
physbase == base == 0, so you're left with "return aa".
So remove abs_to_phys(), and lmb_abs_to_phys() which is the implementation
of abs_to_phys() for iSeries.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
physRpn_to_absRpn is a no-op on non-iSeries platforms, remove the two
redundant calls.There's only one caller on iSeries so fold the logic in there so we can get
rid of it completely.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
The only caller of chunk_offset() and abs_chunk() is phys_to_abs(), so
fold the former two into the latter.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
Rename the msChunks struct to get rid of the StUdlY caps and make it a bit
clearer what it's for.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
Chunks are 256KB, so use constants for the size/shift/mask, rather than
getting them from the msChunks struct. The iSeries debugger (??) might still
need access to the values in the msChunks struct, so we keep them around
for now, but set them from the constant values.Replace msChunks_entry typedef with regular u32.
Simplify msChunks_alloc() to manipulate klimit directly, rather than via
a parameter.Move msChunks_alloc() and msChunks into iSeries_setup.c, as that's where
they're used.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
The msChunks code was written to work on pSeries, but now it's only used on
iSeries. This means there's no need to do PTRRELOC anymore, so remove it all.A few places were getting "extern reloc_offset()" from abs_addr.h, move it
into system.h instead.Signed-off-by: Michael Ellerman
Signed-off-by: Paul Mackerras -
Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Make firmware_has_feature() evaluate at compile time for the non pSeries
case and tidy up code where possible.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Create the firmware_has_feature() inline and move the firmware feature
stuff into its own header file.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
The firmware_features field of struct cpu_spec should really be a separate
variable as the firmware features do not depend on the chip and the
bitmask is constructed independently. By removing it, we save 112 bytes
from the cpu_specs array and we access the bitmask directly instead of via
the cur_cpu_spec pointer.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
On ppc64 machines with segment tables, CPU0's segment table is at a
fixed address, currently 0x9000. This patch moves it to the free
space at 0x6000, just below the fwnmi data area. This saves 8k of
space in vmlinux and the runtime kernel image.Signed-off-by: David Gibson
Signed-off-by: Paul Mackerras -
Comments in head.S suggest that the iSeries naca has a fixed address,
because tools expect to find it there. The only tool which appears to
access the naca is addRamDisk, but both the in-kernel version and the
version used in RHEL and SuSE in fact locate the NACA the same way as
the hypervisor does, by following the pointer in the hvReleaseData
structure.Since the requirement for a fixed address seems to be obsolete, this
patch removes the naca from head.S and replaces it with a normal C
initializer.For good measure, it removes an old version of addRamDisk.c which was
sitting, unused, in the ppc32 tree.Signed-off-by: David Gibson
Signed-off-by: Paul Mackerras -
This patch just splits out the pSeries specific parts of vio.c.
Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
This patch allows us to have a different bus if matching function for
each platform.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
Since the iSeries vio iommu tables cannot be used until after the vio bus has
been initialised, move the initialisation of the tables to there.Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
This patch splits the iSeries specific parts out of vio.c.
Signed-off-by: Stephen Rothwell
Signed-off-by: Paul Mackerras -
This patch updates the format of the flattened device-tree passed
between the boot trampoline and the kernel to support a more compact
representation, for use by embedded systems mostly.Signed-off-by: Benjamin Herrenschmidt
Signed-off-by: Paul Mackerras
