The main UART on the Xilinx ZC702 board is UART1, located at address
e0001000.  Add a Kconfig option to select this device as the low-level
debugging port.  This allows the really early boot printouts to reach
the USB serial adaptor on this board.

For consistency's sake, add a choice entry for UART0 even though it is
the the default if UART1 is not selected.
Signed-off-by: NNick Bowler <nbowler@elliptictech.com>
Tested-by: NJosh Cartwright <josh.cartwright@ni.com>
Acked-by: NMichal Simek <michal.simek@xilinx.com>

Shifting them up into the vmalloc region prevents the following warning,
when booting a zynq qemu target with more than 512mb of RAM:

  BUG: mapping for 0xe0000000 at 0xe0000000 out of vmalloc space

In addition, it allows for reuse of these mappings when the proper
drivers issue requests via ioremap().

There are currently unknown issues with the early uart mapping.  For
now, the uart will be mapped to a known working address.
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Cc: John Linn <john.linn@xilinx.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Tested-by: NMichal Simek <michal.simek@xilinx.com>

The Zynq support in mainline does not (yet) make use of any of the
generic clk or clk lookup functionality.  Remove what is upstream for
now, until the out-of-tree implementation is in suitable form for
merging.

An important side effect of this patch is that it allows the building of
a Zynq kernel without running into unresolved symbol problems:

   drivers/built-in.o: In function `amba_get_enable_pclk':
   clkdev.c:(.text+0x444): undefined reference to `clk_enable'
   drivers/built-in.o: In function `amba_remove':
   clkdev.c:(.text+0x488): undefined reference to `clk_disable'
   drivers/built-in.o: In function `amba_probe':
   clkdev.c:(.text+0x540): undefined reference to `clk_disable'
   drivers/built-in.o: In function `amba_device_add':
   clkdev.c:(.text+0x77c): undefined reference to `clk_disable'
   drivers/built-in.o: In function `enable_clock':
   clkdev.c:(.text+0x29738): undefined reference to `clk_enable'
   drivers/built-in.o: In function `disable_clock':
   clkdev.c:(.text+0x29778): undefined reference to `clk_disable'
   drivers/built-in.o: In function `__pm_clk_remove':
   clkdev.c:(.text+0x297f8): undefined reference to `clk_disable'
   drivers/built-in.o: In function `pm_clk_suspend':
   clkdev.c:(.text+0x29bc8): undefined reference to `clk_disable'
   drivers/built-in.o: In function `pm_clk_resume':
   clkdev.c:(.text+0x29c28): undefined reference to `clk_enable'
   make[2]: *** [vmlinux] Error 1
   make[1]: *** [sub-make] Error 2
   make: *** [all] Error 2

In addition, eliminate Zynq's "use" of the versatile platform, as it is
no longer needed.  As Nick Bowler points out:

   For the record, I think this was introduced by commit 56a34b03
   ("ARM: versatile: Make plat-versatile clock optional") which forgot to
   select PLAT_VERSATILE_CLOCK on Zynq.  This is not all that surprising,
   because the fact that Zynq "uses" PLAT_VERSATILE is secretly hidden in
   the Makefile.

   Nevertheless, the only feature from versatile that Zynq needed was the
   clock support, so this patch should *also* delete the secret use of
   plat-versatile by removing this line from arch/arm/Makefile:

      plat-$(CONFIG_ARCH_ZYNQ)      += versatile
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Cc: John Linn <john.linn@xilinx.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Tested-by: NMichal Simek <michal.simek@xilinx.com>

The Zynq has a PL310 L2 cache controller.  Convert in-tree uses to using
the device tree.
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Cc: John Linn <john.linn@xilinx.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Tested-by: NMichal Simek <michal.simek@xilinx.com>

The Zynq uses the cortex-a9-gic.  This eliminates the need to hardcode
register addresses.
Signed-off-by: NJosh Cartwright <josh.cartwright@ni.com>
Cc: John Linn <john.linn@xilinx.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Tested-by: NMichal Simek <michal.simek@xilinx.com>

Now that many platforms don't need mach/io.h, remove the unused ones.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NPawel Moll <pawel.moll@arm.com>
Acked-by: NNicolas Pitre <nico@linaro.org>

Now that most platforms don't need disable_fiq and arch_ret_to_user
macros, we can remove the empty macros or empty entry-macro.S files.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Acked-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NTony Lindgren <tony@atomide.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NRyan Mallon <rmallon@gmail.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>

When this is the only content remaining in mach/system.h then the
whole file is removed.
Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-and-tested-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Acked-by: NDavid Brown <davidb@codeaurora.org>
Acked-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>

Remove the now empty arch_reset() from all the mach/system.h includes,
and remove its callsite.  Remove arm_machine_restart() as this function
no longer does anything useful.

For samsung platforms, remove the include of mach/system-reset.h and
plat/system-reset.h from their respective mach/system.h headers as these
just define their arch_reset functions.  As a result, the s3c2410 and
plat-samsung system-reset.h files are no longer referenced, so remove
these files entirely.
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch_reset() is deprecated; systems should hook into system restart via
the 'restart' method in the platforms machine description record.
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NJamie Iles <jamie@jamieiles.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>

Convert the zynq platform to be using the gic_handle_irq
function as its primary interrupt handler.
Acked-by: NJohn Linn <john.linn@xilinx.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>

Some platforms (like OMAP not to name it) are doing rather complicated
hacks just to determine the base UART address to use.  Let's give their
addruart macro some slack by providing an extra work register which will
allow for much needed cleanups.

This is basically a no-op as this commit is only adding the extra argument
to the macro but no one is using it yet.
Signed-off-by: Nnicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: NKevin Hilman <khilman@ti.com>

The 1st board support is minimal to get a system up and running
on the Xilinx platform.

This platform reuses the clock implementation from plat-versatile, and
it depends entirely on CONFIG_OF support.  There is only one board
support file which obtains all device information from a device tree
dtb file which is passed to the kernel at boot time.
Signed-off-by: NJohn Linn <john.linn@xilinx.com>