sh: Make associative cache writes fatal on all SH-4A parts.
Now that associative cache writes are no longer needed by the SH-4/SH-4A cache flush code, associative write support can be explicitly disabled for all SH-4A parts. This makes any associative write throw an exception, as this behaviour can not be assumed to exist on future parts. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
parent
a781d1e5ff
commit
6e8a0d11a0
|
@ -75,16 +75,11 @@ static void __init expmask_init(void)
|
|||
/*
|
||||
* Future proofing.
|
||||
*
|
||||
* Disable support for slottable sleep instruction
|
||||
* and non-nop instructions in the rte delay slot.
|
||||
* Disable support for slottable sleep instruction, non-nop
|
||||
* instructions in the rte delay slot, and associative writes to
|
||||
* the memory-mapped cache array.
|
||||
*/
|
||||
expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP);
|
||||
|
||||
/*
|
||||
* Enable associative writes to the memory-mapped cache array
|
||||
* until the cache flush ops have been rewritten.
|
||||
*/
|
||||
expmask |= EXPMASK_MMCAW;
|
||||
expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP | EXPMASK_MMCAW);
|
||||
|
||||
__raw_writel(expmask, EXPMASK);
|
||||
ctrl_barrier();
|
||||
|
|
Loading…
Reference in a new issue