config: Add a default CONFIG_SYS_PROMPT

The definitions for CONFIG_SYS_PROMPT are varied with little reason other
than to display the board name. Over half the definitions are "==> ", so
make this the default. The rest of the boards remain unchanged to avoid
breaking any external scripts expecting a certain prompt.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
config: consolidate CONFIG_SYS_HZ definition

According to the README, CONFIG_SYS_HZ must be 1000 and most platforms
follow that. In preparation to remove CONFIG_SYS_HZ from all these
platforms, provide a common definition. The platforms which use a value
other than 1000 will get build warning now. These configs are:

include/configs/M5271EVB.h:#define CONFIG_SYS_HZ                        1000000
include/configs/balloon3.h:#define      CONFIG_SYS_HZ                   3250000         /* Timer @ 3250000 Hz */
include/configs/idmr.h:#define CONFIG_SYS_HZ                    (50000000 / 64)
include/configs/mini2440.h:#define CONFIG_SYS_HZ                        1562500
include/configs/mx1ads.h:#define CONFIG_SYS_HZ                  3686400
include/configs/omap3_zoom2.h:#define CONFIG_SYS_HZ                     ((V_SCLK) / (2 << CONFIG_SYS_PTV))
include/configs/omap730p2.h:#define CONFIG_SYS_HZ                       ((CONFIG_SYS_CLK_FREQ)/(2 << CONFIG_SYS_PTV))
include/configs/palmld.h:#define        CONFIG_SYS_HZ                   3250000         /* Timer @ 3250000 Hz */
include/configs/palmtc.h:#define        CONFIG_SYS_HZ                   3686400         /* Timer @ 3686400 Hz */
include/configs/rsk7203.h:#define CONFIG_SYS_HZ                 (CONFIG_SYS_CLK_FREQ / CMT_CLK_DIVIDER)
include/configs/rsk7264.h:#define CONFIG_SYS_HZ         (CONFIG_SYS_CLK_FREQ / CMT_CLK_DIVIDER)
include/configs/rsk7269.h:#define CONFIG_SYS_HZ         (CONFIG_SYS_CLK_FREQ / CMT_CLK_DIVIDER)
include/configs/scb9328.h:#define CONFIG_SYS_HZ                 3686400      /* incrementer freq: 3.6864 MHz */
include/configs/versatile.h:#define CONFIG_SYS_HZ                       (1000000 / 256)
include/configs/zipitz2.h:#define       CONFIG_SYS_HZ                   3250000         /* Timer @ 3250000 Hz */

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
config: remove platform CONFIG_SYS_HZ definition part 1/2

Remove platform CONFIG_SYS_HZ definition for configs A-Z*.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
config: remove platform CONFIG_SYS_HZ definition part 2/2

Remove platform CONFIG_SYS_HZ definition for configs a-z*.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
examples: enable gc-sections option

This fixes building time.c when unreferenced functions are added.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Introduce common timer functions

Many platforms duplicate pretty much the same timer code yet they all have
a 32-bit freerunning counter register. Create a common implementation that
minimally requires 2 or 3 defines to add timer support:

CONFIG_SYS_TIMER_RATE - Clock rate of the timer counter
CONFIG_SYS_TIMER_COUNTER - Address of 32-bit counter
CONFIG_SYS_TIMER_COUNTS_DOWN - Define if counter counts down

All functions are weak or ifdef'ed so they can still be overriden by any
platform.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
sh: convert to common timer code

Convert sh to use the commmon timer code. Remove reset_timer and
set_timer as they are unused on sh.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
ARM: highbank: convert to common timer code

Convert highbank to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
ARM: mx25: convert to common timer code

Convert mx25 to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
ARM: vexpress: convert to common timer code

Convert vexpress to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
ARM: socfpga: convert to common timer code

Convert socfpga to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
ARM: tegra: convert to common timer code

Convert tegra to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
ARM: versatile: convert to common timer code

Convert versatile to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
pxe: fix handling of absolute paths

pxelinux and syslinux differ in their handling of absolute paths in menu
files. A pxelinux path is aways prepended with the bootfile path while
syslinux allows for absolute paths. u-boot was always treating a leading
/ as an absolute path breaking some pxelinux setups. Fix this by adding
a flag to distinguish pxelinux vs. syslinux behavior.

Reported-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>