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microblaze: Fix pte_update function

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Do not disable irq in asm but use irq macros.
Systems with MSR=0 couldn't use pte_update function
because msrclr was hardcoded.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2011-02-07 18:51:54 +01:00
parent 1649700408
commit 1f80a67da2
1 changed files with 12 additions and 13 deletions
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25
arch/microblaze/include/asm/pgtable.h
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@ -411,20 +411,19 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
static inline unsigned long pte_update(pte_t *p, unsigned long clr,
unsigned long set)
{
unsigned long old, tmp, msr;
unsigned long flags, old, tmp;
__asm__ __volatile__("\
msrclr %2, 0x2\n\
nop\n\
lw %0, %4, r0\n\
andn %1, %0, %5\n\
or %1, %1, %6\n\
sw %1, %4, r0\n\
mts rmsr, %2\n\
nop"
: "=&r" (old), "=&r" (tmp), "=&r" (msr), "=m" (*p)
: "r" ((unsigned long)(p + 1) - 4), "r" (clr), "r" (set), "m" (*p)
: "cc");
raw_local_irq_save(flags);
__asm__ __volatile__( "lw %0, %2, r0 \n"
"andn %1, %0, %3 \n"
"or %1, %1, %4 \n"
"sw %1, %2, r0 \n"
: "=&r" (old), "=&r" (tmp)
: "r" ((unsigned long)(p + 1) - 4), "r" (clr), "r" (set)
: "cc");
raw_local_irq_restore(flags);
return old;
}