I believe these changes are needed on Alchemy SoCs in order to
use iomem above 4G with the usual platform_device machinery:

- Set CONFIG_ARCH_PHYS_ADDR_T_64BIT to make resource_size_t 64-bit.
- Increase IOMEM_RESOURCE_END so that platforms can register resources.

To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/814/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

In the old source code, I have let halt and poweroff do the same action,
but in reality, they have different meanings.

As the manpage of shutdown shows:

-r     Reboot after shutdown.
-H     Halt action is to halt or drop into boot monitor on systems that support it.
-P     Halt action is to turn off the power.

and in the real world, some machines(e.g. NAS) did not provide a power
button and the shutdown works as reset, so, we need to provide a
mechanism to let the users turn off the power safely without breaking
the system, such a mechanism is "halt", which only put the system into a
dead loop or a power-save mode and print some information to the screen
to tell the users to turn off the power safely.

$ shutdown -hH now /* loongson_halt, not turn off the power */
$ shutdown -hP now /* loongson_poweroff, work as poweroff */
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Tested-by: NLiu Shiwei <liushiwei@gmail.com>
Cc: Liu Shiwei <liushiwei@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/883/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Found by

$ find arch/mips/ -name "*.c" | xargs -i grep -H weak {} | grep -v __weak

[Ralf: Made this bulletproof by including <linux/compiler.h>]
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/874/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Hook up the compressed debug output for all Alchemy systems supported
by current kernel codebase.
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/879/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This patch makes the ar7 clock code implement the Linux clk API. Drivers
using the various clocks available in the SoC are updated accordingly.
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Acked-by: NWim Van Sebroeck <wim@iguana.be>
To: linux-mips@linux-mips.org
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: netdev@vger.kernel.org
Cc: David Miller <davem@davemloft.net>
Patchwork: http://patchwork.linux-mips.org/patch/881/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This patch implements gpiolib for the AR7 SoC.
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/816/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NYoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/868/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This patch removes a useless "\" (line break) and tunes the format of a
long line.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/869/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NYoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/872/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NYoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/871/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Recent git versions now warn about those and they've always been a bit of
an annoyance.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
To: linux-mips@linux-mips.org
To: Andrew Morton <akpm@linux-foundation.org>
To: LKML <linux-kernel@vger.kernel.org>
Patchwork: http://patchwork.linux-mips.org/patch/860/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

For processors that have more than 64 TLBs, we need to decode both
config1 and config4 to determine the total number TLBs.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/866/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The function probe_tlb() only does anything for processors that are
not PRID_COMP_LEGACY.  This is precisely the set of processors for
which decode_configs() is called to do identical tlbsize probing
calculations.  Therefore probe_tlb() is completely redundant and may
be removed.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/865/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

MIPS currently lacks the readl_be and writel_be accessors
which are required by BCM63xx for OHCI and EHCI support.
Let's define them globally for MIPS. This also fixes the
compilation of the bcm63xx defconfig against USB.
Signed-off-by: NFlorian Fainelli <ffainelli@freebox.fr>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@linux-mips.org
Cc: Maxime Bizon <mbizon@freebox.fr>
Patchwork: http://patchwork.linux-mips.org/patch/793/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Changes:

  o Serial port related configuration
    Disable EARLY_PRINTK, CONFIG_SYS_SUPPORTS_ZBOOT_UART16550
    Enable the serial port support as module.
  o PM related support
    Enable CPUFreq as module, use the external timer(MFGPT) instead of
    r4k timer.
    Enable Suspend support
    Enable Run Time PM support
  o Enable SM7XX Video Driver
    Disable the buggy 2d acceleration
  o Enable CONFIG_OPROFILE as module
  o Use GZIP instead of LZMA, which need less decompression time
  o Enable more USB devices support
  o Enable initrd support(needed by gNewsense)
  o Enable more crypto support
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/830/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Currently wuzj@lemote.com is not usable; change it to wuzhangjin@gmail.com.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/829/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Replace whitespace by tabs.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/828/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This patch add missing whitespace after every "+=" in the loongson
related part of arch/mips/Makefile.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/827/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Changes:

	o Move bus_clock into prom_init_env()
	o Initialize the cpu_clock_freq to the default values for the
	correspoding processor revisions if no such environment variable
	passed by BIOS/Bootloader.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/826/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

prom_argc and prom_argv are only used by prom_init_cmdline(), move them
into the function.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/825/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The compressed kernel support on loongson family machines is stable now,
so, remove the debug information via using SYS_SUPPORTS_ZBOOT instead of
SYS_SUPPORTS_ZBOOT_UART16550. This may reduce the image size and speedup
the booting.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/824/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Use the new unreachable() macro instead of while(1);
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/823/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Without this patch, when copying large amounts of data between the USB
storage devices and the hard disk, the USB device will disconnect
regularly.
Signed-off-by: NHu Hongbing <huhb@lemote.com>
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Patchwork: http://patchwork.linux-mips.org/patch/822/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Lemote have used the PMON_VER strings to indicate the loongson-2f
machine series:

 	PMON_VER=LM8089		Lemote 8.9'' netbook
 	         LM8101		Lemote 10.1'' netbook
 	(The above two netbooks have the same kernel support)
	         LM6XXX		Lemote FuLoong(2F) box series
	         LM9XXX		Lemote LynLoong PC series

Before the machtype is supported by the PMON, we can get the machine
type from the PMON_VER for these machines, this will help the users a
lot.
Signed-off-by: NWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: zhangfx@lemote.com
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/821/
Patchwork: http://patchwork.linux-mips.org/patch/908/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

If an interrupt handler disables interrupts, the EOI function will
just reenable them.  This will put us in an endless loop when the
upcoming Ethernet driver patches are applied.

Only reenable the interrupt on EOI if it is not IRQ_DISABLED.  This
requires that the EOI function be separate from the ENABLE function.
We also rename the ACK functions to correspond with their function.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/patch/840/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

In order to achieve correct synchronization semantics, the Octeon port
had defined CONFIG_WEAK_REORDERING_BEYOND_LLSC.  This resulted in code
that looks like:

   sync
   ll ...
   .
   .
   .
   sc ...
   .
   .
   sync

The second SYNC was redundant, but harmless.

Octeon has a SYNCW instruction that acts as a write-memory-barrier
(due to an erratum in some parts two SYNCW are used).  It is much
faster than SYNC because it imposes ordering on the writes, but
doesn't otherwise stall the execution pipeline.  On Octeon, SYNC
stalls execution until all preceeding writes are committed to the
coherent memory system.

Using:

    syncw;syncw
    ll
    .
    .
    .
    sc
    .
    .

Has identical semantics to the first sequence, but is much faster.
The SYNCW orders the writes, and the SC will not complete successfully
until the write is committed to the coherent memory system.  So at the
end all preceeding writes have been committed.  Since Octeon does not
do speculative reads, this functions as a full barrier.

The patch removes CONFIG_WEAK_REORDERING_BEYOND_LLSC, and substitutes
SYNCW for SYNC in write-memory-barriers.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/850/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Replace some instances of smp_llsc_mb() with a new macro
smp_mb__before_llsc().  It is used before ll/sc sequences that are
documented as needing write barrier semantics.

The default implementation of smp_mb__before_llsc() is just smp_llsc_mb(),
so there are no changes in semantics.

Also simplify definition of smp_mb(), smp_rmb(), and smp_wmb() to be just
barrier() in the non-SMP case.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/851/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The smp_llsc_rmb() and smp_llsc_wmb() macros are not used in the tree,
remove them.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/848/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: linux-i2c@vger.kernel.org
To: ben-linux@fluff.org
To: khali@linux-fr.org
Cc: Rade Bozic <rade.bozic.ext@nsn.com>
Patchwork: http://patchwork.linux-mips.org/patch/845/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: linux-i2c@vger.kernel.org
To: ben-linux@fluff.org
To: khali@linux-fr.org
Cc: Rade Bozic <rade.bozic.ext@nsn.com>
Patchwork: http://patchwork.linux-mips.org/patch/847/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/810/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Implement reset / poweroff in the board code instead.  The peripheral reset
code is gone too since YAMON which all in-tree boards use does the same
work when it boots.
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: NYoichi Yuasa <yuasa@linux-mips.org>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/783/
Patchwork: http://patchwork.linux-mips.org/patch/882/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

For 64-bit kernels with 64KB pages and two level page tables, there are
42 bits worth of virtual address space This is larger than the 40 bits of
virtual address space obtained with the default 4KB Page size and three
levels, so there are no draw backs for using two level tables with this
configuration.
Signed-off-by: NDavid Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/761/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Use runtime CPU detection instead of relying on preprocessor symbols.
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/701/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Use the GPIO config symbol to only build Au1000 interrupt code on chips with
compatible hw.
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/670/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Remove the cpu subtype cpp macros in favor of runtime detection,
to improve compile coverage of the alchemy common code.
(Increases kernel size by 700 bytes).
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/699/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This patch makes the board code register the au1000-eth platform device. The
au1000-eth platform data can be overriden with the au1xxx_override_eth_cfg
function like it has to be done for the Bosporus board which uses a
different MAC/PHY setup.
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Cc: David Miller <davem@davemloft.net>
Cc: linux-mips@linux-mips.org
Cc: netdev@vger.kernel.org
Patchwork: http://patchwork.linux-mips.org/patch/618/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Machine driver for DB1200 AC97 and I2S audio systems, intended as a proper
reference asoc machine for Alchemy-based systems.  AC97/I2S can be selected
at boot time by setting switch S6.7.
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Cc: alsa-devel@alsa-project.org
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>