Unverified Commit 4797a685 authored by Artyom Tarasenko's avatar Artyom Tarasenko
Browse files

target-sparc: replace the last tlb entry when no free entries left 



Implement the behavior described in the chapter 13.9.11 of
UltraSPARC T1™ Supplement to the UltraSPARC Architecture 2005:

"If a TLB Data-In replacement is attempted with all TLB
entries locked and valid, the last TLB entry (entry 63) is
replaced."

Signed-off-by: default avatarArtyom Tarasenko <atar4qemu@gmail.com>
parent 2f1b5292

target/sparc/ldst_helper.c

+4 −2
Original line number Diff line number Diff line
@@ -246,9 +246,11 @@ static void replace_tlb_1bit_lru(SparcTLBEntry *tlb, 
    }



#ifdef DEBUG_MMU

    DPRINTF_MMU("%s lru replacement failed: no entries available\n", strmmu);

    DPRINTF_MMU("%s lru replacement: no free entries available, "

                "replacing the last one\n", strmmu);

#endif

    /* error state? */

    /* corner case: the last entry is replaced anyway */

    replace_tlb_entry(&tlb[63], tlb_tag, tlb_tte, env1);

}



#endif