Prior to this change, Tegra's debug-macro.S relied on uncompress.h having
determined which UART to use, and whether it was safe to use the UART
(i.e. is it not in reset, and is clocked). This determination was
communicated from uncompress.h to debug-macro.S using a few bytes of
Tegra's IRAM (an on-SoC RAM). This had the disadvantage that uncompress.h
was a required part of the kernel boot process; booting a non-compressed
kernel would not allow earlyprintk to operate.
This change duplicates the UART selection and validation logic into
debug-macro.S so that the reliance on uncompress.h is removed.
This also helps out with single-zImage work, since there is currently no
support for using any uncompress.h with single-zImage.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Nothing outside mach-tegra uses this file, so there's no need for it to
be in <mach/>.
Since uncompress.h and debug-macro.S remain in include/mach, they need
to include "../../irammap.h" becaue of this change. Both these usages
will be removed shortly, when Tegra's DEBUG_LL implementation is updated
not to pass information through IRAM.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren