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PPC: Add dcbtls emulation 

The dcbtls instruction is able to lock data inside the L1 cache.

Unfortunately we don't emulate any caches, so we have to tell the guest
that its locking attempt failed.

However, by implementing the instruction we at least don't give the
guest a program exception which it definitely does not expect.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-01-19 17:50:09 +01:00
parent ea71258da4
commit 4d09d5291d
1 changed files with 12 additions and 0 deletions
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12
target-ppc/translate.c
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@ -4481,6 +4481,17 @@ static void gen_dcbtst(DisasContext *ctx)
*/
}
/* dcbtls */
static void gen_dcbtls(DisasContext *ctx)
{
/* Always fails locking the cache */
TCGv t0 = tcg_temp_new();
gen_load_spr(t0, SPR_Exxx_L1CSR0);
tcg_gen_ori_tl(t0, t0, L1CSR0_CUL);
gen_store_spr(SPR_Exxx_L1CSR0, t0);
tcg_temp_free(t0);
}
/* dcbz */
static void gen_dcbz(DisasContext *ctx)
{
@ -10215,6 +10226,7 @@ GEN_HANDLER(dcbi, 0x1F, 0x16, 0x0E, 0x03E00001, PPC_CACHE),
GEN_HANDLER(dcbst, 0x1F, 0x16, 0x01, 0x03E00001, PPC_CACHE),
GEN_HANDLER(dcbt, 0x1F, 0x16, 0x08, 0x00000001, PPC_CACHE),
GEN_HANDLER(dcbtst, 0x1F, 0x16, 0x07, 0x00000001, PPC_CACHE),
GEN_HANDLER_E(dcbtls, 0x1F, 0x06, 0x05, 0x02000001, PPC_BOOKE, PPC2_BOOKE206),
GEN_HANDLER(dcbz, 0x1F, 0x16, 0x1F, 0x03C00001, PPC_CACHE_DCBZ),
GEN_HANDLER(dst, 0x1F, 0x16, 0x0A, 0x01800001, PPC_ALTIVEC),
GEN_HANDLER(dstst, 0x1F, 0x16, 0x0B, 0x02000001, PPC_ALTIVEC),