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cris: Break out rand LFSR update into a separate func. 

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@axis.com>
This commit is contained in:
Edgar E. Iglesias 2010-07-05 10:15:10 +02:00
parent 08af49da7e
commit 253248a3be
1 changed files with 12 additions and 7 deletions
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19
target-cris/mmu.c
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@ -55,6 +55,17 @@ static inline unsigned int compute_polynom(unsigned int sr)
return f;
}
static void cris_mmu_update_rand_lfsr(CPUState *env)
{
unsigned int f;
/* Update lfsr at every fault. */
f = compute_polynom(env->mmu_rand_lfsr);
env->mmu_rand_lfsr >>= 1;
env->mmu_rand_lfsr |= (f << 15);
env->mmu_rand_lfsr &= 0xffff;
}
static inline int cris_mmu_enabled(uint32_t rw_gc_cfg)
{
return (rw_gc_cfg & 12) != 0;
@ -251,14 +262,8 @@ static int cris_mmu_translate_page(struct cris_mmu_result *res,
}
if (!match) {
unsigned int f;
cris_mmu_update_rand_lfsr(env);
/* Update lfsr at every fault. */
f = compute_polynom(env->mmu_rand_lfsr);
env->mmu_rand_lfsr >>= 1;
env->mmu_rand_lfsr |= (f << 15);
env->mmu_rand_lfsr &= 0xffff;
/* Compute index. */
idx = vpage & 15;