linux-toradex.git/arch/powerpc/boot/oflib.c, branch v5.0

powerpc/boot: Define a routine to enter prom

2014-04-28T07:36:08+00:00

This patch defines a 'prom' routine similar to 'enter_prom' in the
kernel.

The difference is in the MSR which is built before entering prom. Big
endian order is enforced as in the kernel but 32bit mode is not. It
prepares ground for the next patches which will introduce Little endian
order.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Fix compile warning in 64bit

2014-04-28T07:35:51+00:00

arch/powerpc/boot/oflib.c:211:9: warning: cast to pointer from integer of \
		  different size [-Wint-to-pointer-cast]
  return (phandle) of_call_prom("finddevice", 1, 1, name);

This is a work around. The definite solution would be to define the
phandle typedef as a u32, as in the kernel, but this would break the
device tree ops API.

Let it be for the moment.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Define typedef ihandle as u32

2014-04-28T07:35:47+00:00

This makes ihandle 64bit friendly.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Rework of_claim() to make it 64bit friendly

2014-04-28T07:35:43+00:00

This patch fixes 64bit compile warnings and updates the wrapper code
to converge the kernel code in prom_init.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Add PROM_ERROR define in oflib

2014-04-28T07:35:39+00:00

This is mostly useful to make to the boot wrapper code closer with
the kernel code in prom_init.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Add byteswapping routines in oflib

2014-04-28T07:35:35+00:00

Values will need to be byte-swapped when calling prom (big endian) from
a little endian boot wrapper.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Use prom_arg_t in oflib

2014-04-28T07:35:31+00:00

This patch updates the wrapper code to converge with the kernel code in
prom_init.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc/boot: Use a common prom_args struct in oflib

2014-04-28T07:35:26+00:00

This patch fixes warnings when the wrapper is compiled in 64bit and
updates the boot wrapper code related to prom to converge with the
kernel code in prom_init. This should make the review of changes easier.

The kernel has a different number of possible arguments (10) when
entering prom. There does not seem to be any good reason to have
12 in the wrapper, so the patch changes this value to args[10] in
the prom_args struct.

Signed-off-by: Cédric Le Goater 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Change the default link address for pSeries zImage kernels

2008-07-01T01:28:32+00:00

Currently we set the start of the .text section to be 4Mb for pSeries.
In situations where the zImage is > 8Mb we'll fail to boot (due to
overlapping with OF).  Move .text in a zImage from 4MB to 64MB
(well past OF).

We still will not be able to load large zImage unless we also move OF,
to that end, add a note to the zImage ELF to move OF to 32Mb.  If this
is the very first kernel booted then we'll need to move OF manually by
setting real-base.

Signed-off-by: Tony Breeds 
Signed-off-by: Paul Mackerras

[POWERPC] Make more OF-related bootwrapper functions available to non-OF platforms

2007-06-28T09:19:28+00:00

Commit 2e6016133755eb3cc44e8efab92573d23ed75888 split up
arch/powerpc/boot/of.c so that some OF functions can be used on
platforms that don't want to use the overall OF platform boot code.
This is useful on things like PReP which can have an OF implementation
which is useful for debugging output, but inadequate for booting.

However, that commit didn't export quite enough things to make a
usable OF console on a non-OF system.  In particular, the device tree
manipulation performed to initialize the OF console code must
explicitly use the OF device tree, rather than the flattened device
tree, even if the system is otherwise booting using a flattened device
tree.  This makes it so.

Signed-off-by: David Gibson 
Signed-off-by: Paul Mackerras