While the MMUCR.URB and ITLB/UTLB differentiation works fine for all SH-4
and later TLBs, these features are absent on SH-3. This splits out
local_flush_tlb_all() in to SH-4 and PTEAEX copies while restoring the
old SH-3 one, subsequently fixing up the build.

This will probably want some further reordering and tidying in the
future, but that's out of scope at present.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This is needed with some of the tracing code built as modules, so provide
the export.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Word copying is used only for aligned addresses.
Here is space for improving to use any better copying technique.
Look at memcpy implementation.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

If early printk console is not enabled then all messages
are written to log buffer.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I forget to change register name in comments.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

TLB size was hardcoded in asm code. This patch brings ability
to change TLB size only in one place. (mmu.h).
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I forget to remove pci Kconfig option.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

On the base on GCOV analytics is helpful to add likely/unlikely
macros.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Cachegrind analysis need this fix to be able to log asm functions.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

To be able to do trace TLB operations.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

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

RESR and REAR uses the same regs in whole file.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

This change synchronize register usage in code.
ESR = R4
EAR = R3
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Any sync branch must follow mts instructions not mfs.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Disable debug option in asm code.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

When the system has no lmb bram, main memory should be start from
zero because of microblaze vectors.

DTS fragment could look like:
	DDR2_SDRAM: memory@0 {
		device_type = "memory";
		reg = < 0x0 0x10000000 >;
	} ;

Then you have to setup CONFIG_KERNEL_BASE_ADDR=0 which caused
that kernel physical start address will be zero. On reset vector place
will be jump to 0x100 and on 0x100 starts kernel text.

You have to solve how to load the kernel before cpu starts.
Tested with XMD.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

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

Move to generic location.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

noMMU and MMU use them.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Here is small regression on dhrystone tests and I think
that on all benchmarking tests. It is due to better checking
mechanism in put_user macro
Signed-off-by: NMichal Simek <monstr@monstr.eu>

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

Previous patches fixed only MMU version and this is the first
patch for noMMU kernel
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Generic implementation for noMMU and MMU version
Signed-off-by: NMichal Simek <monstr@monstr.eu>

copy_from_user macro also use copy_tofrom_user function
Signed-off-by: NMichal Simek <monstr@monstr.eu>

noMMU and MMU kernel will use copy copy_tofrom_user
asm implementation.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Add macro description and resort.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Use FIXUP macros and resort them.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

It is used __FIXUP_SECTION and __EX_TABLE_SECTION macros.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

This is the first patch which does uaccess unification.
I choosed to do several patches to be able to use bisect
in future if any fault happens.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

The same noMMU and MMU functions should be placed in
one file.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

Just sort to be able remove whole block.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

I would like to use asm-generic uaccess.h where are segment
macros defined. This is just first step.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

We don't need to do it.
Signed-off-by: NMichal Simek <monstr@monstr.eu>

If CONFIG_INITRAMFS_SOURCE is set, "scripts/gen_initramfs_list.sh"
checks if the cpio image exists. Remove the duplicate check from the
Makefile.

Remove the "clean-kernel" variable which is unused in the Makefile and
is not used by the Kbuild.
Signed-off-by: NArun Bhanu <arun@bhanu.net>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

'make clean' does not to delete the following build generated file:
	arch/microblaze/boot/linux.bin.ub

'make mrproper' does not to delete the following build generated files:
	arch/microblaze/boot/simpleImage.*

Fix the Makefile to delete these build generated files.

See [1] for a discussion on why simpleImage.* files are deleted with 'make
mrproper' and not with 'make clean'.
	[1] http://lkml.org/lkml/2010/3/12/96Signed-off-by: NArun Bhanu <arun@bhanu.net>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

'make ARCH=microblaze help' fails with the following error due to a
missing single quote.

/bin/sh: -c: line 0: unexpected EOF while looking for matching `''
/bin/sh: -c: line 1: syntax error: unexpected end of file
make: *** [help] Error 2
Signed-off-by: NArun Bhanu <arun@bhanu.net>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

The "kstack=" command line parameter is not parsed correctly.
All proper values are interpreted as zero.
Signed-off-by: NSteven J. Magnani <steve@digidescorp.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

For 32-bit processes, we save the full 64-bits of the regs in pt_regs.

But unlike when the userspace actually does load and store
instructions, the top 32-bits don't get automatically truncated by the
cpu in kernel mode (because the kernel doesn't execute with PSTATE_AM
address masking enabled).

So we have to do it by hand.
Reported-by: NFrederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When CONFIG_NO_BOOTMEM=y, it could use memory more effiently, or
in a more compact fashion.

Example:

 Allocated new RAMDISK: 00ec2000 - 0248ce57
 Move RAMDISK from 000000002ea04000 - 000000002ffcee56 to 00ec2000 - 0248ce56

The new RAMDISK's end is not page aligned.
Last page could be shared with other users.

When free_init_pages are called for initrd or .init, the page
could be freed and we could corrupt other data.

code segment in free_init_pages():

 |        for (; addr < end; addr += PAGE_SIZE) {
 |                ClearPageReserved(virt_to_page(addr));
 |                init_page_count(virt_to_page(addr));
 |                memset((void *)(addr & ~(PAGE_SIZE-1)),
 |                        POISON_FREE_INITMEM, PAGE_SIZE);
 |                free_page(addr);
 |                totalram_pages++;
 |        }

last half page could be used as one whole free page.

So page align the boundaries.

-v2: make the original initramdisk to be aligned, according to
     Johannes, otherwise we have the chance to lose one page.
     we still need to keep initrd_end not aligned, otherwise it could
     confuse decompressor.
-v3: change to WARN_ON instead, suggested by Johannes.
-v4: use PAGE_ALIGN, suggested by Johannes.
     We may fix that macro name later to PAGE_ALIGN_UP, and PAGE_ALIGN_DOWN
     Add comments about assuming ramdisk start is aligned
     in relocate_initrd(), change to re get ramdisk_image instead of save it
     to make diff smaller. Add warning for wrong range, suggested by Johannes.
-v6: remove one WARN()
     We need to align beginning in free_init_pages()
     do not copy more than ramdisk_size, noticed by Johannes
Reported-by: NStanislaw Gruszka <sgruszka@redhat.com>
Tested-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Acked-by: NJohannes Weiner <hannes@cmpxchg.org>
Cc: David Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1269830604-26214-3-git-send-email-yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Fix:

 ------------[ cut here ]------------
 WARNING: at arch/x86/mm/init.c:342 free_init_pages+0x4c/0xfa()
 free_init_pages: range [0x40daf000, 0x40db5c24] is not aligned
 Modules linked in:
 Pid: 0, comm: swapper Not tainted
 2.6.34-rc2-tip-03946-g4f16b23-dirty #50 Call Trace:
  [<40232e9f>] warn_slowpath_common+0x65/0x7c
  [<4021c9f0>] ? free_init_pages+0x4c/0xfa
  [<40881434>] ? _etext+0x0/0x24
  [<40232eea>] warn_slowpath_fmt+0x24/0x27
  [<4021c9f0>] free_init_pages+0x4c/0xfa
  [<40881434>] ? _etext+0x0/0x24
  [<40d3f4bd>] alternative_instructions+0xf6/0x100
  [<40d3fe4f>] check_bugs+0xbd/0xbf
  [<40d398a7>] start_kernel+0x2d5/0x2e4
  [<40d390ce>] i386_start_kernel+0xce/0xd5
 ---[ end trace 4eaa2a86a8e2da22 ]---

Comments in vmlinux.lds.S already said:

 |        /*
 |         * smp_locks might be freed after init
 |         * start/end must be page aligned
 |         */
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Acked-by: NJohannes Weiner <hannes@cmpxchg.org>
Cc: David Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <1269830604-26214-2-git-send-email-yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>