mirror of https://gitee.com/openkylin/linux.git
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>
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@ -75,16 +75,11 @@ static void __init expmask_init(void)
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/*
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* Future proofing.
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*
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* Disable support for slottable sleep instruction
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* and non-nop instructions in the rte delay slot.
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* Disable support for slottable sleep instruction, non-nop
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* instructions in the rte delay slot, and associative writes to
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* the memory-mapped cache array.
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*/
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expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP);
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/*
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* Enable associative writes to the memory-mapped cache array
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* until the cache flush ops have been rewritten.
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*/
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expmask |= EXPMASK_MMCAW;
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expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP | EXPMASK_MMCAW);
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__raw_writel(expmask, EXPMASK);
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ctrl_barrier();
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