While trying to reduce U/X state issues, I notice that our BSS is not
being initialised in the hello world test.
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
When building with yosys we assume hello_world fits in 8kB. There's
enough free space that we can adjust the linker script to make it fit.
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
This commit enhances hello_world.bin output by printing
a ASCII lightbulb, which turns out to be Microwatt's logo,
instead of simply a "Hello World" text message.
Signed-off-by: Gustavo Romero <gustavo.romero@protonmail.com>
Use a more generic console_init() instead of potato_uart_init(),
and do the same for interrupt control. There should be no
change in behaviour.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
console.c goes to a new lib/ where we'll store other general utilities
and console.h goes to include/
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
It makes things a bit more standard and a bit nicer to read
without all those strlen(). Also console.c takes care of adding
the carriage returns before the linefeeds.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Make putchar() match a standard prototype and add puts()
Also make puts() add carriage returns before linefeeds so the
users don't have to do it all over the place.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This uses the new header files for register definitions and
extracts the core frequency from syscon rather than hard coding it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Currently hello_world fails to build with distro cross compiler
packages such as Debian gcc-powerpc64-linux-gnu, because it doesn't
provide string.h or unistd.h. In fact we don't need them, we just
need stddef.h. This adds #include <stddef.h> to console.h to get
size_t defined. We also add #include "console.h" to console.c.
The hello_world Makefile currently hard-codes CROSS_COMPILE on
non-PPC machines. This means that a command like:
$ CROSS_COMPILE=powerpc64le-linux-gnu- make
doesn't do what you expect; it just tries to use powerpc64le-linux-gcc
regardless. Adding a '?' makes it do what one expects.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Shrink hello_world a bit (from 12kB to 8kB).
Include the built images
Add 0x10 and 0x100 entry points
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
