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PPC: booke206: Check for min/max TLB entry size

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When setting a TLB entry, we need to check if the TLB we're putting it in
actually supports the given size. According to the 2.06 PowerPC ISA, a
value that's out of range can either be redefined to something implementation
dependent or we can raise an illegal opcode exception. We do the latter.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-01-20 04:07:51 +01:00
parent a1ef618a37
commit 5935ee072d
1 changed files with 11 additions and 0 deletions
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11
target-ppc/op_helper.c
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@ -4228,6 +4228,7 @@ void helper_booke206_tlbwe(void)
{
uint32_t tlbncfg, tlbn;
ppcmas_tlb_t *tlb;
uint32_t size_tlb, size_ps;
switch (env->spr[SPR_BOOKE_MAS0] & MAS0_WQ_MASK) {
case MAS0_WQ_ALWAYS:
@ -4259,6 +4260,16 @@ void helper_booke206_tlbwe(void)
tlb = booke206_cur_tlb(env);
/* check that we support the targeted size */
size_tlb = (env->spr[SPR_BOOKE_MAS1] & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
size_ps = booke206_tlbnps(env, tlbn);
if ((env->spr[SPR_BOOKE_MAS1] & MAS1_VALID) && (tlbncfg & TLBnCFG_AVAIL) &&
!(size_ps & (1 << size_tlb))) {
helper_raise_exception_err(POWERPC_EXCP_PROGRAM,
POWERPC_EXCP_INVAL |
POWERPC_EXCP_INVAL_INVAL);
}
if (msr_gs) {
cpu_abort(env, "missing HV implementation\n");
}