Optimized C library functions can rapidly speedup the kernel.
memset doesn't need to be optimized because there is no difference
in behavior on little/big endian cpu.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

memcpy/memmove/memset
Signed-off-by: NMichal Simek <monstr@monstr.eu>

New microblaze systems uses two buses. One for memories
and flashes and the second for low-speed peripherals
which can run on different CLK. This is the reason
why the kernel is trying to read clock-frequency
directly from node. If there is then the kernel will
work with it. If not then cpu CLK is used.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Microblaze little-endian toolchain exports __MICROBLAZEEL__
which is used in the kernel to identify little/big endian.

The most of the changes are in loading values from DTB which
is always big endian.

Little endian platforms are based on new AXI bus which has
impact to early uartlite initialization.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Just need to use little-endian opcode for brki r16, 0x18
Signed-off-by: NMichal Simek <monstr@monstr.eu>
CC: Jason Wessel <jason.wessel@windriver.com>

Upcomming microblaze version will support little-endian.
Signed-off-by: NMichal Simek <monstr@monstr.eu>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>

Upcomming Microblaze is little endian that's why is necessary
to fix protocol and length loading.
Signed-off-by: NMichal Simek <monstr@monstr.eu>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NDavid S. Miller <davem@davemloft.net>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: netdev@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: devicetree-discuss@lists.ozlabs.org

AXI and OPB share some PVR macros.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Use set_dma_ops and remove now used-once oddly named temp pointer sd.
Signed-off-by: NMilton Miller <miltonm@bga.com>
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Early console support reuse setting from U-BOOT that's why
it is not necessary to setup baudrates, etc.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Kconfig blocks to select any other early console support that's why
this patch has no real impact on current kernel version. But it is done
because of uart16550.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Just setup pointer early console in run time.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

This is done because of uart16550 early printk support
Signed-off-by: NMichal Simek <monstr@monstr.eu>

This dependency is resolved in menuconfig.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Device-tree BSP generates longer compatible properties
that's why we can remove extra/old one.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

It comes from past where pvr wasn't supported in msr instruction.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

per cpu changes requires VMALLOC_START/END to be
define even for noMMU systems.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Several kernel modules requires empty_zero_page and mbc
to be exported.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Replaced libgcc functions with asm optimized implementation.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

gpiolib returns -ENXIO if struct gpio_chip::to_irq isn't set, so it's
safe to always call.

Based on PPC patch
"powerpc/gpio: support gpio_to_irq()"
78331adeSigned-off-by: NMichal Simek <monstr@monstr.eu>

mmiowb is required by any driver.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Signed-off-by: NMichal Simek <monstr@monstr.eu>

Use asm-generic/pci-dma-compat.h instead of the homegrown
pci_set_dma_mask and pci_set_consistent_dma_mask.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

Signed-off-by: NMichal Simek <monstr@monstr.eu>

PVR for 7.30.b, 8.00.a versions.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

OUTPUT_FORMAT setup bigendian platform. Microblaze Linux port
is becoming bi endian that's why it is removed.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

r16 and r17 should be saved across interrupt and exception handling.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

CONFIG_CONTIGUOUS_PAGE_ALLOC doesn't exist in Kconfig, therefore removing
all references to it from the source.
Signed-off-by: NChristian Dietrich <qy03fugy@stud.informatik.uni-erlangen.de>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Kernel needs two timers because of clocksource and clockevent.
It is better to show warning message directly on early
console if available. If it isn't available kernel log buffer
contains it.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Signal code uses r3 value which saved in restore_sigcontext to
rt_sigframe but it require to be zeroed. If is not zero rt_sigframe
contains wrong values.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Do not save return registers before rt_sigreturn is called.
_user_exception(syscall handler) already setup return address
that's why it is removed from rt_sigreturn_wrapper.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

TIF_KERNEL_TRACE is not used anywhere.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Add seccomp support.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Old gdb uses priviledged exception handler to handle
gdb exception. New gdb uses brki r16, 0x18 that's why
we can remove old gdb support.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Coding style cleanup.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Compilation warning:
mm/memory.c: In function '__pte_alloc':
mm/memory.c:421: warning: assignment makes integer from pointer without a cast
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I forget to remove unused variable from kgdb_arch_handle_exception.
Fix return value in microblaze_kgdb_break function.

Error log:
arch/microblaze/kernel/kgdb.c: In function 'microblaze_kgdb_break':
arch/microblaze/kernel/kgdb.c:83: warning: 'return' with a value, in function returning void
arch/microblaze/kernel/kgdb.c: In function 'kgdb_arch_handle_exception':
arch/microblaze/kernel/kgdb.c:119: warning: unused variable 'cpu'
Signed-off-by: NMichal Simek <monstr@monstr.eu>

LL Temac dts nodes should contain ranges property.
It is sufficient to use empty ranges property.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>