Commit Graph

11 Commits

Author SHA1 Message Date
Becky Bruce
1605cc9e1b powerpc/mpc86xx: Disable translation for BAT setup
We really shouldn't be overwriting bat registers with translation enabled,
especially when we're executing code using one of them for translating
the current instruction stream.  Instead, disable address translation
while doing the final BAT setup.

In order to do this, setup_bats has to move back to asm code, because we
require translation to be enabled to have a stack for C code.  The yucky
thing about that is that the assembler doesn't like ULL so we have to
switch to using HIGH/LOW pairs for physical addresses that are > 32 bits
in length.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-10-09 17:57:54 -05:00
Timur Tabi
9ff32d8ccf mpc86xx: set the DDR BATs after calculating true DDR size
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 <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-03-30 10:50:22 -05:00
Becky Bruce
d35ae5a938 powerpc: Move duplicated BAT defines to mmu.h
The BAT fields are architected; there's no need for these to be in
cpu-specific files.  Drop the duplication and move these to
include/asm-ppc/mmu.h.  Also, remove the BL_xxx defines that were only
used by the alaska board, and switch to using the BATU_BL_xxx defines
used by all the other boards.  The BL_ defines previously in use
had to be shifted into the proper position for use, which was inefficient.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
2009-02-10 00:27:40 +01:00
Trent Piepho
ada591d2a0 mpc8[56]xx: Put localbus clock in sysinfo and gd
Currently MPC85xx and MPC86xx boards just calculate the localbus frequency
and print it out, but don't save it.

This changes where its calculated and stored to be more consistent with the
CPU, CCB, TB, and DDR frequencies and the MPC83xx localbus clock.

The localbus frequency is added to sysinfo and calculated when sysinfo is
set up, in cpu/mpc8[56]xx/speed.c, the same as the other frequencies are.

get_clocks() copies the frequency into the global data, as the other
frequencies are, into a new field that is only enabled for MPC85xx and
MPC86xx.

checkcpu() in cpu/mpc8[56]xx/cpu.c will print out the local bus frequency
from sysinfo, like the other frequencies, instead of calculating it on the
spot.

Signed-off-by: Trent Piepho <tpiepho@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Jon Loeliger <jdl@freescale.com>
2008-12-19 18:32:49 -06:00
Jean-Christophe PLAGNIOL-VILLARD
6d0f6bcf33 rename CFG_ macros to CONFIG_SYS
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-10-18 21:54:03 +02:00
Anton Vorontsov
bf30bb1f7c 83xx/85xx/86xx: factor out Freescale Localbus defines out of mpc83xx.h
This patch moves Freescale Localbus defines out of mpc83xx.h, so we could
use it on MPC85xx and MPC86xx processors.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
2008-06-10 12:28:08 -05:00
Rafal Jaworowski
02032e8f14 [ppc] Fix build breakage for all non-4xx PowerPC variants.
- adapt to the more generic EXCEPTION_PROLOG and CRIT_EXCEPTION macros
- minor 4xx cleanup
2007-06-22 14:58:04 +02:00
James Yang
a75af9bfd8 Conditionalize 8641 Rev1.0 MCM workarounds
Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
2007-05-01 12:43:58 -05:00
Jon Loeliger
b93775c203 Cleanup even more poorly introduced whitespace. 2006-08-22 18:26:08 -05:00
Jon Loeliger
5c9efb36a6 Cleanup whitespaces and style issues.
Removed //-style comments.
Use 80-column lines.
Remove trailing whitespace.
Remove dead code and debug cruft.
2006-04-27 10:15:16 -05:00
Jon Loeliger
debb7354d1 Initial support for MPC8641 HPCN board. 2006-04-26 17:58:56 -05:00