u-boot.git/cpu/mpc86xx, branch master

ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU

2010-04-13T07:13:16+00:00

Signed-off-by: Peter Tyser

mpc86xx: set the DDR BATs after calculating true DDR size

2010-03-30T15:50:22+00:00

After determining how much DDR is actually in the system, set DBAT0 and
IBAT0 accordingly.  This ensures that the CPU won't attempt to access
(via speculation) addresses outside of actual memory.

On 86xx systems, DBAT0 and IBAT0 (the BATs for DDR) are initialized to 2GB
and kept that way.  If the system has less than 2GB of memory (typical for
an MPC8610 HPCD), the CPU may attempt to access this memory during
speculation.  The zlib code is notorious for generating such memory reads,
and indeed on the MPC8610, uncompressing the Linux kernel causes a machine
check (without this patch).

Currently we are limited to power of two sized DDR since we only use a
single bat.  If a non-power of two size is used that is less than
CONFIG_MAX_MEM_MAPPED u-boot will crash.

Signed-off-by: Timur Tabi 
Signed-off-by: Kumar Gala

kgdb: cpu/mpc* cpu/74xx: include kgdb.h when needed

2010-02-08T21:05:42+00:00

Commit cbb0cab1d929839d broke some platforms which used kgdb code but
didn't actually include kgdb.h.  So include kgdb.h in all the relevant
traps code.

Signed-off-by: Mike Frysinger

86xx: Add support for 'cpu disable' command

2010-01-27T05:17:50+00:00

Support disabling of a core via user command 'cpu disable'.

Signed-off-by: Kumar Gala

Add support to disable cpu's in multicore processors

2010-01-27T05:17:49+00:00

Add a disable sub-command to the cpu command that allows for disabling
cores in multicore processors.  This can be useful for systems that are
using multicore chips but aren't utilizing all the cores as a way to
reduce power and possibly improve performance.

Also updated an added missing copyright.

Signed-off-by: Kumar Gala

ppc: remove -ffixed-r14 gcc option.

2010-01-26T18:30:16+00:00

This is no loger needed, free up r14 for general usage.

Signed-off-by: Joakim Tjernlund

ppc: Use r12 instead of r14 as GOT pointer.

2010-01-26T18:30:13+00:00

r14 is not supposed to be clobbered by functions. Switch
to r12 and call GET_GOT when needed. This will allow u-boot
to loose the -ffixed-r14 gcc option.

Signed-off-by: Joakim Tjernlund

ppc: Loose GOT access in IRQ

2010-01-26T18:30:12+00:00

Using the GOT in IRQ handlers requires r14 to be -ffixed-r14.
Avoid this by relocatate transfer_to_handler too.
This will allow to free up r14 later on.

Signed-off-by: Joakim Tjernlund

kgdb: drop duplicate debugger_exception_handler

2010-01-17T23:23:33+00:00

The debugger_exception_handler definition is the same for everyone, so use
the common one now.

Signed-off-by: Mike Frysinger

relocation: Do not relocate NULL pointers.

2009-10-08T07:33:36+00:00

NULL is an absolute value and should not be relocated.
After this correction code like:
 void weak_fun(void) __attribute__((weak));
 printf("weak_fun:%p\n", weak_fun);
will still print null after relocation.

Signed-off-by: Joakim Tjernlund