linux-toradex.git/arch/powerpc/kernel/misc_64.S, branch v4.4.89

powerpc/book3e-64: Enable kexec

2015-10-27T23:13:30+00:00

Allow KEXEC for book3e, and bypass or convert non-book3e stuff
in kexec code.

Signed-off-by: Tiejun Chen 
[scottwood@freescale.com: move code to minimize diff, and cleanup]
Signed-off-by: Scott Wood

powerpc/book3e-64/kexec: Set "r4 = 0" when entering spinloop

2015-10-27T23:13:30+00:00

book3e_secondary_core_init will only create a TLB entry if r4 = 0,
so do so.

Signed-off-by: Scott Wood

powerpc/book3e-64/kexec: create an identity TLB mapping

2015-10-27T23:13:28+00:00

book3e has no real MMU mode so we have to create an identity TLB
mapping to make sure we can access the real physical address.

Signed-off-by: Tiejun Chen 
[scottwood: cleanup, and split off some changes]
Signed-off-by: Scott Wood

powerpc/kexec: Reset secondary cpu endianness before kexec

2015-08-20T08:19:08+00:00

If the target kernel does not inlcude the FIXUP_ENDIAN check, coming
from a different-endian kernel will cause the target kernel to panic.
All ppc64 kernels can handle starting in big-endian mode, so return to
big-endian before branching into the target kernel.

This mainly affects pseries as secondaries on powernv are returned to
OPAL.

Signed-off-by: Samuel Mendoza-Jonas 
Signed-off-by: Michael Ellerman

powerpc: module: handle MODVERSION for .TOC.

2014-04-23T00:05:28+00:00

For the ELFv2 ABI, powerpc introduces a magic symbol ".TOC.".  If we
don't create a CRC for it (minus the leading ".", since we strip that)
we get a modpost warning about missing CRC and the CRC array seems to
be displaced by 1 so other CRCs mismatch too.

Signed-off-by: Rusty Russell

powerpc: EXPORT_SYMBOL(.TOC.)

2014-04-23T00:05:28+00:00

For the ELFv2 ABI, powerpc introduces a magic symbol ".TOC.".  depmod
then complains that this doesn't resolve (so does modpost, but we could
easily fix that).  To export this, we need to use asm.

modpost and depmod both strip "." from symbols for the old PPC64 ELFv1
ABI, so we actually export a "TOC.".

Signed-off-by: Rusty Russell

powerpc: ABIv2 function calls must place target address in r12

2014-04-23T00:05:20+00:00

To establish addressability quickly, ABIv2 requires the target
address of the function being called to be in r12. Fix a number of
places in assembly code that we do indirect function calls.

We need to avoid function descriptors on ABIv2 too.

Signed-off-by: Anton Blanchard

powerpc: No need to use dot symbols when branching to a function

2014-04-23T00:05:16+00:00

binutils is smart enough to know that a branch to a function
descriptor is actually a branch to the functions text address.

Alan tells me that binutils has been doing this for 9 years.

Signed-off-by: Anton Blanchard

Merge branch 'merge' into next

2013-12-30T04:19:31+00:00

Merge a pile of fixes that went into the "merge" branch (3.13-rc's) such
as Anton Little Endian fixes.

Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix build break with PPC_EARLY_DEBUG_BOOTX=y

2013-12-10T00:25:03+00:00

A kernel configured with PPC_EARLY_DEBUG_BOOTX=y but PPC_PMAC=n and
PPC_MAPLE=n will fail to link:

  btext.c:(.text+0x2d0fc): undefined reference to `.rmci_off'
  btext.c:(.text+0x2d214): undefined reference to `.rmci_on'

Fix it by making the build of rmci_on/off() depend on
PPC_EARLY_DEBUG_BOOTX, which also enable the only code that uses them.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt