Doxygen cleanups ...

- Remove trailing whitespaces from doxygen files
- escape '<' '>' with backslashes. Otherwise Doxygen interpretes them as
  html tags

Signed-off-by: Carsten Schlote <schlote@vahanus.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

do not sleep if read gets EAGAIN. Must be some testing leftover

Add the possibility to have an architecture specific ctrlc() function. ...

This allows us to return immediately in ctrlc() on sandbox and thus
not slow down network througput.

[sandbox] fix read for buffers of zero length ...

This patch fixes the read function for the linux sandbox if a buffer
of zero length should be read. The error handling introduced in
6574529 detects a false positive if the
length is zero.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

[sandbox] add error handling to read ...

This patch adds propper error handling to the linux' read functions.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

[sparse] define functions static, use NULL as NULL pointer ...

fixes:
arch/sandbox/board/hostfile.c:32:9: warning: symbol 'hf_read' was not declared. Should it be static?
arch/sandbox/board/hostfile.c:43:9: warning: symbol 'hf_write' was not declared. Should it be static?

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

[sandbox] fix stdin and stdout fd for sandbox console ...

u_boot_register_console uses the wrong filedescriptors for in and out
the are swapped. This patch fixes this problem and uses fileno instead.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

[sandbox] HACK: add variable _SDA_BASE_ to main, to please linker ...

This patch is a _CRUDE_HACK_ the linker complains about the missing
symbol _SDA_BASE_ on powerpc, so git it to him to please him and
finally link the sandbx.

LD      uboot
/usr/lib/gcc/powerpc-linux-gnu/4.2.3/../../../../lib/crt1.o:(.rodata+0x0): undefined reference to `_SDA_BASE_'

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

[sandbox] use C99 initializers ...

This patch uses C99 initializers to initialize the timeout in linux_tstc()

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

some doc added to uboot's simlator feature. Not finished yet.

arch/linux -> arch/sandbox