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[S390] Use copy_to_absolute_zero() instead of "stura/sturg"

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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>
This commit is contained in:
Michael Holzheu
2012-03-11 11:59:28 -04:00
committed by Martin Schwidefsky
parent 4c1051e37a
commit b43445ff6c
1 changed files with 6 additions and 24 deletions
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30
arch/s390/kernel/ipl.c
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@@ -1498,30 +1498,12 @@ static struct shutdown_action __refdata dump_action = {
static void dump_reipl_run(struct shutdown_trigger *trigger) static void dump_reipl_run(struct shutdown_trigger *trigger)
{ {
preempt_disable(); u32 csum;
/*
* Bypass dynamic address translation (DAT) when storing IPL parameter csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
* information block address and checksum into the prefix area copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
* (corresponding to absolute addresses 0-8191). copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
* When enhanced DAT applies and the STE format control in one, sizeof(reipl_block_actual));
* the absolute address is formed without prefixing. In this case a
* normal store (stg/st) into the prefix area would no more match to
* absolute addresses 0-8191.
*/
#ifdef CONFIG_64BIT
asm volatile("sturg %0,%1"
:: "a" ((unsigned long) reipl_block_actual),
"a" (&lowcore_ptr[smp_processor_id()]->ipib));
#else
asm volatile("stura %0,%1"
:: "a" ((unsigned long) reipl_block_actual),
"a" (&lowcore_ptr[smp_processor_id()]->ipib));
#endif
asm volatile("stura %0,%1"
:: "a" (csum_partial(reipl_block_actual,
reipl_block_actual->hdr.len, 0)),
"a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
preempt_enable();
dump_run(trigger); dump_run(trigger);
} }