14 Oct, 2010
19 commits
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It adds cache-sram support in P1/P2 QorIQ platforms as under:
* A small abstraction over powerpc's remote heap allocator
* Exports mpc85xx_cache_sram_alloc()/free() APIs
* Supports only one contiguous SRAM window
* Drivers can do the following in Kconfig to use these APIs
"select FSL_85XX_CACHE_SRAM if MPC85xx"
* Required SRAM size and the offset where SRAM should be mapped must be
provided at kernel command line as :
cache-sram-size=
cache-sram-offset=Signed-off-by: Harninder Rai
Signed-off-by: Vivek Mahajan
Signed-off-by: Kumar Gala -
The device tree for Freescale's P1022DS reference board is missing the node
for the ngPIXIS FPGA.Signed-off-by: Timur Tabi
Signed-off-by: Kumar Gala -
arch/powerpc/kernel/paca.c: In function 'allocate_lppacas':
arch/powerpc/kernel/paca.c:111:1: error: parameter name omitted
arch/powerpc/kernel/paca.c:111:1: error: parameter name omittedSigned-off-by: Kumar Gala
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The P3041DS is in the same family of boards as the P4080DS and thus
shares the corenet_ds code.Signed-off-by: Kumar Gala
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On an arch 2.06 hypervisor, a pending perfmon interrupt will be delivered
to the hypervisor at any point the guest is running, regardless of
MSR[EE]. In order to reflect this interrupt, the hypervisor has to mask
the interrupt in PMGC0 -- and set MSRP[PMMP] to intercept futher guest
accesses to the PMRs to detect when to unmask (and prevent the guest from
unmasking early, or seeing inconsistent state).This has the side effect of ignoring any changes the guest makes to
MSR[PMM], so wait until after the interrupt is clear, and thus the
hypervisor should have cleared MSRP[PMMP], before setting MSR[PMM]. The
counters wil not actually run until PMGC0[FAC] is cleared in
pmc_start_ctrs(), so this will not reduce the effectiveness of PMM.Signed-off-by: Scott Wood
Signed-off-by: Kumar Gala -
Signed-off-by: Kumar Gala
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Add 'fsl,qoriq-gpio' compatiable to the list we search for to bind
against for mpc8xxx_gpio. This compatiable will be used on P1-P5xxx
QorIQ devices like P4080.Signed-off-by: Kumar Gala
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First we check to see if we are the first core booting up. This
is accomplished by comparing the boot_cpuid with -1, if it is we
assume this is the first core coming up.Secondly, we need to update the initial thread info structure
to reflect the actual cpu we are running on otherwise
smp_processor_id() and related functions will return the default
initialization value of the struct or 0.Signed-off-by: Matthew McClintock
Signed-off-by: Kumar Gala -
Like the MPC8610 HPCD, the P1022DS ASoC DMA driver probes on individual DMA
channel nodes, so the DMA controller nodes' compatible string must be
listed in p1022_ds_ids[] to work.Signed-off-by: Timur Tabi
Signed-off-by: Kumar Gala -
The first global-utilities node might not contain the rstcr
property, so we should search all the nodesSigned-off-by: Matthew McClintock
Acked-by: Timur Tabi
Signed-off-by: Kumar Gala -
There exists a four line chunk of code, which when configured for
64 bit address space, can incorrectly set certain page flags during
the TLB creation. It turns out that this is code which isn't used,
but might still serve a purpose. Since it isn't obvious why it exists
or why it causes problems, the below description covers both in detail.For powerpc bootstrap, the physical memory (at most 768M), is mapped
into the kernel space via the following path:MMU_init()
|
+ adjust_total_lowmem()
|
+ map_mem_in_cams()
|
+ settlbcam(i, virt, phys, cam_sz, PAGE_KERNEL_X, 0);On settlbcam(), the kernel will create TLB entries according to the flag,
PAGE_KERNEL_X.settlbcam()
{
...
TLBCAM[index].MAS1 = MAS1_VALID
| MAS1_IPROT | MAS1_TSIZE(tsize) | MAS1_TID(pid);
^
These entries cannot be invalidated by the
kernel since MAS1_IPROT is set on TLB property.
...
if (flags & _PAGE_USER) {
TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
}For classic BookE (flags & _PAGE_USER) is 'zero' so it's fine.
But on boards like the the Freescale P4080, we want to support 36-bit
physical address on it. So the following options may be set:CONFIG_FSL_BOOKE=y
CONFIG_PTE_64BIT=y
CONFIG_PHYS_64BIT=yAs a result, boards like the P4080 will introduce PTE format as Book3E.
As per the file: arch/powerpc/include/asm/pgtable-ppc32.h* #elif defined(CONFIG_FSL_BOOKE) && defined(CONFIG_PTE_64BIT)
* #includeSo PAGE_KERNEL_X is __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX) and the
book3E version of _PAGE_KERNEL_RWX is defined with:(_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX)
Note the _PAGE_BAP_SR, which is also defined in the book3E _PAGE_USER:
#define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */
So the possibility exists to wrongly assign the user MAS3_U bits
to kernel (PAGE_KERNEL_X) address space via the following code fragment:if (flags & _PAGE_USER) {
TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
}Here is a dump of the TLB info from Simics with the above code present:
------
L2 TLB1
GT SSS UUU V I
Row Logical Physical SS TLPID TID WIMGE XWR XWR F P V
----- ----------------- ------------------- -- ----- ----- ----- --- --- - - -
0 c0000000-cfffffff 000000000-00fffffff 00 0 0 M XWR XWR 0 1 1
1 d0000000-dfffffff 010000000-01fffffff 00 0 0 M XWR XWR 0 1 1
2 e0000000-efffffff 020000000-02fffffff 00 0 0 M XWR XWR 0 1 1Actually this conditional code was used for two legacy functions:
1: support KGDB to set break point.
KGDB already dropped this; now uses its core write to set break point.2: io_block_mapping() to create TLB in segmentation size (not PAGE_SIZE)
for device IO space.
This use case is also removed from the latest PowerPC kernel.However, there may still be a use case for it in the future, like
large user pages, so we can't remove it entirely. As an alternative,
we match on all bits of _PAGE_USER instead of just any bits, so the
case where just _PAGE_BAP_SR is set can't sneak through.With this done, the TLB appears without U having XWR as below:
-------
L2 TLB1
GT SSS UUU V I
Row Logical Physical SS TLPID TID WIMGE XWR XWR F P V
----- ----------------- ------------------- -- ----- ----- ----- --- --- - - -
0 c0000000-cfffffff 000000000-00fffffff 00 0 0 M XWR 0 1 1
1 d0000000-dfffffff 010000000-01fffffff 00 0 0 M XWR 0 1 1
2 e0000000-efffffff 020000000-02fffffff 00 0 0 M XWR 0 1 1Signed-off-by: Tiejun Chen
Signed-off-by: Paul Gortmaker
Signed-off-by: Kumar Gala -
This patch adds support for MPC8308 P1M board.
Supported devices:
DUART
Dual Ethernet
NOR flash
Both I2C controllers
USB in peripheral mode
PCI ExpressSigned-off-by: Ilya Yanok
Signed-off-by: Kumar Gala -
When we do an mpic_reset_core we need to make sure the dcache is flushed.
Signed-off-by: Matthew McClintock
Signed-off-by: Kumar Gala -
Make kexec_down_cpus atmoic since it will be incremented by all cores as
they are coming down.Remove duplicate calls to mpc85xx_smp_kexec_down, now it's called by the
crash and normal kexec pathway only once.Increase the timeout to wait for other cores to shutdown.
Signed-off-by: Matthew McClintock
Signed-off-by: Kumar Gala -
We no longer need to call this explicitly as a generic version is called
by default.Signed-off-by: Matthew McClintock
Signed-off-by: Kumar Gala -
Right now just the kexec crash pathway turns turns off the interrupts.
Pull that out and make a generic version for use elsewhereSigned-off-by: Matthew McClintock
Signed-off-by: Kumar Gala -
Register the __init and __exit functions in the PowerPC Book-E Watchdog
driver as module entry/exit functions, and modify the Kconfig entry.Add a .release method for the PowerPC Book-E Watchdog driver, so that the
watchdog is disabled when the driver is closed.Loosely based on original code from Jiang Yutang .
Signed-off-by: Timur Tabi
Signed-off-by: Kumar Gala -
Export the global variable 'ppc_tb_freq', so that modules (like the Book-E
watchdog driver) can use it. To maintain consistency, ppc_proc_freq is
changed to a GPL-only export. This is okay, because any module that needs
this symbol should be an actual Linux driver, which must be GPL-licensed.Signed-off-by: Timur Tabi
Acked-by: Josh Boyer
Signed-off-by: Kumar Gala -
The following commit broke 83xx because it assumed the 83xx platforms
exposed the "IMMR" address in BAR0 like the 85xx/86xx/QoriQ devices do:commit 3da34aae03d498ee62f75aa7467de93cce3030fd
Author: Kumar Gala
Date: Tue May 12 15:51:56 2009 -0500powerpc/fsl: Support unique MSI addresses per PCIe Root Complex
However that is not true, so we have to search through the inbound
window settings on 83xx to find which one matches the IMMR address to
determine its PCI address.Reported-by: Ilya Yanok
Signed-off-by: Kumar Gala
13 Oct, 2010
18 commits
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Replace EXTRA_CFLAGS with ccflags-y and EXTRA_AFLAGS with asflags-y.
Signed-off-by: matt mooney
Signed-off-by: Benjamin Herrenschmidt -
The default for llseek is changing, so we need
explicit operations everywhere.Signed-off-by: Arnd Bergmann
Cc: Jeremy Kerr
Cc: linuxppc-dev@ozlabs.org
Signed-off-by: Benjamin Herrenschmidt -
Current firmware only allows us to send IRQs to the first processor or
all processors. We currently check to see if the passed in mask is equal
to the all_mask, but the firmware is only considering whether the
request is for the equivalent of the possible_mask. Thus, we think the
request is for some subset of CPUs and only assign IRQs to the first CPU
(on systems without irqbalance running) as evidenced by
/proc/interrupts. By using possible_mask instead, we account for this
and proper interleaving of interrupts occurs.Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
Use set_dma_ops and remove unused oddly-named temp pointer sd.
Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Acked-by: Grant Likely
Signed-off-by: Benjamin Herrenschmidt -
While looking at some code paths I came across this code that zeros
memory then copies over the entire length.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
Release the TCE table as the XXX suggests, except on FW_FEATURE_ISERIES,
where the tables are allocated globally and reused.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
The kernel doc for device_register (and device_initialize) very clearly
state to call put_device not kfree after calling, even on error.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Acked-by: Grant Likely
Signed-off-by: Benjamin Herrenschmidt -
The current check is wrong because it does not take the DMA offset intot
account, and in the case of a driver which doesn't actually support
64bits would falsely report that device as working.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
The table offset is in entries, each of which imply a dma address of
an IOMMU page.Also, we should check the device can reach the whole IOMMU table.
Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Signed-off-by: Benjamin Herrenschmidt -
BUID_HI and BUID_LO are used to pass data to call_rtas, which expects
ints or u32s. But the macro doesn't cast the return, so the result is
still u64. Use the upper_32_bits and lower_32_bits macros that have been
added to kernel.h.Found by getting printf format errors trying to debug print the args, no
actual code change for 64 bit kernels where the macros are actually
used.Signed-off-by: Milton Miller
Signed-off-by: Nishanth Aravamudan
Acked-by: Linas Vepstas
Signed-off-by: Benjamin Herrenschmidt -
The function has an unsigned return type, but returns a negative constant
to indicate an error condition. The result of calling the function is
always stored in a variable of type (signed) int, and thus unsigned can be
dropped from the return type.A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)//
@exists@
identifier f;
constant C;
@@unsigned f(...)
{ }
//Signed-off-by: Julia Lawall
Acked-by: Olof Johansson
Signed-off-by: Benjamin Herrenschmidt -
In this case, a device_node structure is stored in another structure that
is then freed without first decrementing the reference count of the
device_node structure.The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)//
@r exists@
expression x;
identifier f;
position p1,p2;
@@x@p1->f = \(of_find_node_by_path\|of_find_node_by_name\|of_find_node_by_phandle\|of_get_parent\|of_get_next_parent\|of_get_next_child\|of_find_compatible_node\|of_match_node\|of_find_node_by_type\|of_find_node_with_property\|of_find_matching_node\|of_parse_phandle\|of_node_get\)(...);
... when != of_node_put(x)
kfree@p2(x)@script:python@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("call",p1)
cocci.print_secs("free",p2)
//Signed-off-by: Julia Lawall
Signed-off-by: Benjamin Herrenschmidt -
Signed-off-by: Joe Perches
Signed-off-by: Benjamin Herrenschmidt -
Signed-off-by: Joe Perches
Reviewed-by: Stephen Rothwell
Signed-off-by: Benjamin Herrenschmidt -
Enable partition migration in the kernel. To do this a new sysfs file,
/sys/kernel/mobility/migration, is created. In order to initiate a migration
the stream id (generated by the HMC managing the system) is written to this
file.After a migration occurs, and what is the majority of this code, the device
tree needs to be updated for the new system the partition is running on. This
is done via the ibm,update-nodes and ibm,update-properties rtas calls which
return information regarding which nodes and properties of the device tree
are to be added/removed/updated.Signed-off-by: Nathan Fontenot
Signed-off-by: Benjamin Herrenschmidt -
Export the rtas_ibm_suspend_me() routine. This is needed to perform
partition migration in the kernel.Signed-off-by: Nathan Fontenot
Signed-off-by: Benjamin Herrenschmidt -
Export routines associated with adding and removing device tree nodes on
pseries needed for device tree updating.Signed-off-by: Nathan Fontenot
Signed-off-by: Benjamin Herrenschmidt
08 Oct, 2010
3 commits
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arch/powerpc/platforms/built-in.o:(.toc1+0x18): undefined reference to `__early_start'
This is due to the 85xx/smp.c not handling the 64-bit side properly. We
need to set the entry point for secondary cores on ppc64e to
generic_secondary_smp_init instead of __early_start that we due on ppc32.Signed-off-by: Kumar Gala
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* 'hwpoison-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6:
HWPOISON: Stop shrinking at right page count
HWPOISON: Report correct address granuality for AO huge page errors
HWPOISON: Copy si_addr_lsb to user
page-types.c: fix name of unpoison interface -
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
elevator: fix oops on early call to elevator_change()
