forked from Minki/linux
[S390] Use copy_to_absolute_zero() instead of "stura/sturg"
Use the new copy_to_absolute_zero() function instead of manual "stura" and "sturg" to make the code shorter and more readable. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -1498,30 +1498,12 @@ static struct shutdown_action __refdata dump_action = {
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static void dump_reipl_run(struct shutdown_trigger *trigger)
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{
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preempt_disable();
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/*
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* Bypass dynamic address translation (DAT) when storing IPL parameter
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* information block address and checksum into the prefix area
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* (corresponding to absolute addresses 0-8191).
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* When enhanced DAT applies and the STE format control in one,
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* the absolute address is formed without prefixing. In this case a
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* normal store (stg/st) into the prefix area would no more match to
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* absolute addresses 0-8191.
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*/
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#ifdef CONFIG_64BIT
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asm volatile("sturg %0,%1"
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:: "a" ((unsigned long) reipl_block_actual),
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"a" (&lowcore_ptr[smp_processor_id()]->ipib));
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#else
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asm volatile("stura %0,%1"
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:: "a" ((unsigned long) reipl_block_actual),
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"a" (&lowcore_ptr[smp_processor_id()]->ipib));
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#endif
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asm volatile("stura %0,%1"
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:: "a" (csum_partial(reipl_block_actual,
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reipl_block_actual->hdr.len, 0)),
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"a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
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preempt_enable();
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u32 csum;
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csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
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copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
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copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
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sizeof(reipl_block_actual));
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dump_run(trigger);
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}
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