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set new page table entry before we flush the TLB

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This commit is contained in:
Stefan Lankes 2015-08-12 20:58:08 +02:00
parent ecc71937fa
commit 579feaa64f
1 changed files with 8 additions and 1 deletions
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9
hermit/arch/x86/mm/page.c
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@ -152,12 +152,19 @@ int page_map(size_t viraddr, size_t phyaddr, size_t npages, size_t bits)
}
}
else { /* PGT */
int8_t flush = 0;
/* do we have to flush the TLB? */
if (self[lvl][vpn] & PG_PRESENT)
flush = 1;
self[lvl][vpn] = phyaddr | bits | PG_PRESENT;
if (flush)
/* There's already a page mapped at this address.
* We have to flush a single TLB entry. */
tlb_flush_one_page(vpn << PAGE_BITS);
self[lvl][vpn] = phyaddr | bits | PG_PRESENT;
phyaddr += PAGE_SIZE;
}
}