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target-microblaze: mmu: Make the TLBX MISS bit read-only 

Make the TLBX MISS bit read-only.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
This commit is contained in:
Edgar E. Iglesias 2018-04-15 23:21:06 +02:00
parent bd9e66086b
commit fce6a8eceb
1 changed files with 4 additions and 0 deletions
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4
target/microblaze/mmu.c
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@ -273,6 +273,10 @@ void mmu_write(CPUMBState *env, uint32_t rn, uint32_t v)
env->mmu.regs[rn] = v; env->mmu.regs[rn] = v;
} }
break; break;
case MMU_R_TLBX:
/* Bit 31 is read-only. */
env->mmu.regs[rn] = deposit32(env->mmu.regs[rn], 0, 31, v);
break;
case MMU_R_TLBSX: case MMU_R_TLBSX:
{ {
struct microblaze_mmu_lookup lu; struct microblaze_mmu_lookup lu;