This achieves two goals:

1) Get rid of davinci_uart_v2p() and davinci_uart_p2v() which were the
   last users of PLAT_PHYS_OFFSET.

2) Remove the probing of the M bit in the CP15 control reg and make
   the access to the .data variables completely position independent.
Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: NKevin Hilman <khilman@ti.com>
Tested-by: NKevin Hilman <khilman@ti.com>

This is the first step to remove PLAT_PHYS_OFFSET usage from the debug
UART code.
Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: NKevin Hilman <khilman@ti.com>
Tested-by: NKevin Hilman <khilman@ti.com>

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>

Fixup davinci UART low-level debug code for new ARM generic p2v changes.

Based on OMAP changes by Tony Lindgren

Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: NKevin Hilman <khilman@ti.com>

Rather than checking the MMU status in every instance of addruart, do it
once in kernel/debug.S, and change the existing addruart macros to
return both physical and virtual addresses. The main debug code can then
select the appropriate address to use.

This will also allow us to retreive the address of a uart for the MMU
state that we're not current in.

Updated with fixes for OMAP from Jason Wang <jason77.wang@gmail.com>
and Tony Lindgren <tony@atomide.com>, and fix for versatile express from
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>.
Signed-off-by: NJeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NJason Wang <jason77.wang@gmail.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Tested-by: NKevin Hilman <khilman@deeprootsystems.com>

This patch adopts a debug uart selection similar to the OMAP model.  During
the boot process, the uncompress code determines the physical and virtual base
addresses of the board-specific debug uart.  These addresses are then passed
on to the in-kernel debug macros through a small chunk of memory placed just
below the page tables (@0x80003ff8).
Signed-off-by: NCyril Chemparathy <cyril@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

Otherwise more complicated uart configuration won't be possible.
We can use r1 for tmp register for both head.S and debug.S.

NOTE: This patch depends on another patch to add the the tmp register
into all debug-macro.S files. That can be done with:

$ sed -i -e "s/addruart,rx|addruart, rx/addruart, rx, tmp/"
	arch/arm/*/include/*/debug-macro.S
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add support for the DA850/OMAP-L138 Evaluation Module (EVM)
from TI.  The EVM has User Interface (UI) card which contains
various devices. This UI card can be connected to the base
board. Support for all the devices on the UI card and ones on
the EVM will be added in subsequent patches.

The EVM schematics are not available publicly yet; but should
be available soon.

A new defconfig for this board has been added mainly because
the DA830/OMAP-L137 defconfig forces writethrough cache mode
which is not required on DA850/OMAP-L138.

This patch has been boot tested on DA850/OMAP-L138 EVM
using ramdisk as filesystem.
Signed-off-by: NSudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

Add support for the DA830/OMAP-L137 Evaluation Module (EVM)
from TI.  The EVM has User Interface (UI) and Audio cards
that can be connected which contain various devices.
Support for those devices and ones on the EVM will be
added in subsequent patches.

Additional generalizations for future SoCs in da8xx family done by
Sudhakar Rajashekhara and Sekhar Nori.
Signed-off-by: NSteve Chen <schen@mvista.com>
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

This patch defines debug macros for low-level debugging for Davinci
based platforms

Tested on :
        - DM644x DaVinci EVM
        - DM646X DaVinciHD EVM
	- DM355 EVM

This patch attempts to solve the low-level debug issue in DM646x. The
UART on DM646x SoC allows only 32-bit access. The existing
debug-macro.S uses the macros from debug-8250.S file. This led to
garbage serial out in the case of DM646x.

The inclusion of debug-8250.S does not allow for run time fix for this
issue.  There are compile time errors due to multiple definitions of
the macros.  Also when building a single image for multiple DaVinci
Platforms, the ifdefs cannot be relied upon.

The solution below does not include the debug-8250.S file and defines
the necessary macros. This solution was arrived at after observing
that word access does not affect the low-level debug messages on
DM644x/DM355.

The other approach to this issue is to use the UART module information
available in the peripheral registers to decide the access
mechanism. But this will have to be done for every access of UART
specifically for DM646x. Also this calls for a modification of the
debug-8250.S file.
Signed-off-by: NChaithrika U S <chaithrika@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

This just leaves include/asm-arm/plat-* to deal with.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add base kernel support for the TI DaVinci platform.

This patch only includes interrupts, timers, CPU identification,
serial support and basic power and sleep controller init.  More
drivers to come.
Signed-off-by: NKevin Hilman <khilman@mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>