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15 Commits

Author SHA1 Message Date
Mike Frysinger
a92946bc6a Blackfin arch: use the new bfin_addr_dcachable() function 
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-10-16 23:25:34 +08:00
Sonic Zhang
f099f39acf Blackfin arch: Make L2 SRAM cacheable 
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-10-09 14:11:57 +08:00
Graf Yang
5b04f271fe Blackfin arch: Modify some funtion names to more genernal ones 
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-10-08 17:32:57 +08:00
Bernd Schmidt
5d2e321306 Blackfin arch: fixing bug - under IRQ stress, running applications may wrongly trigger an ICPLB miss and be killed 
Disable IRQs while frobbing the CPLB registers, to avoid accessing the
data in current_rwx_mask while it isn't covered by CPLBs.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-10-07 16:27:01 +08:00
Mike Frysinger
9216bbc838 Blackfin arch: mark some functions as __init as they are only called from __init functions 
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-08-14 14:35:20 +08:00
Bernd Schmidt
00d205a1ce [Blackfin] arch: lose unnecessary dependency on CONFIG_BFIN_ICACHE for MPU 
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-25 03:26:48 +08:00
Mike Frysinger
4bea8b20fd [Blackfin] arch: add implicit icplb for the bootrom so we can use the utility functions in the kernel 
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-24 07:23:36 +08:00
Mike Frysinger
4e354b5499 [Blackfin] arch: cplb-mpu code clean up 
- allow bootrom to be readable from supervisor mode
 - delete unused local variable "addr"
 - punt unused local defines of cplbinfo.c

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-24 05:44:32 +08:00
Mike Frysinger
8cab0288c6 [Blackfin] arch: add boot messages to quickly distinguish between MPU/NOMPU settings 
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-24 05:13:10 +08:00
Bernd Schmidt
1ebc723cf0 [Blackfin] arch: support the reserved memory region in the MPU code 
Pointed-out-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-24 02:58:26 +08:00
Bernd Schmidt
d56daae9be [Blackfin] arch: fix bug - a crash on bootup with CONFIG_MPU on the BF548 
The function flush_switched_dcplbs was clearing the CPLB entries covering
the process permission bitmasks.  This means that the sequence

	flush_switched_dcplbs ();
        set_mask_dcplbs(mm->context.page_rwx_mask);

has a problem: if kernel code (such as an interrupt) causes a CPLB miss before
set_mask_dcplbs completes, the CPLB handler function causes a double fault,
with an instantaneous reboot.

This bug fix is dedicated to Michael Hennerich, the only person in the world
capable of providing working JTAG hardware.

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-24 02:56:36 +08:00
Bernd Schmidt
b4bb68f7d0 [Blackfin] arch: fix bug - Make the MPU code aware of the async banks and the uncached DMA area. 
Bug: CONFIG_MPU doesn't seem to handle access to ASYNC/IO Memory well
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3912

Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-23 07:26:23 +08:00
Bernd Schmidt
dbfe44f02b [Blackfin] arch: fix up - CONFIG_BLKFIN_WT was renamed CONFIG_BFIN_WT while the MPU code was out-of-tree. 
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
 2008-04-23 07:11:55 +08:00
Mike Frysinger
c605999bd9 [Blackfin] arch: error out if ANOMALY_05000263 applies while enabling the MPU 
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
 2008-02-02 12:28:23 +08:00
Bernd Schmidt
b97b8a9983 [Blackfin] arch: Initial checkin of the memory protection support. 
Enable it with CONFIG_MPU.

Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
 2008-01-27 18:39:16 +08:00