From e1338ff2c0419c3be3cfc2902fa5f4d68cb88b27 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Thu, 25 Aug 2011 16:41:18 +1000 Subject: [PATCH] microblaze: Make the MSR PVR bit non writable Instead of hardcoding it to 1. Signed-off-by: Edgar E. Iglesias --- target-microblaze/translate.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c index 1a862d3..15f1fe5 100644 --- a/target-microblaze/translate.c +++ b/target-microblaze/translate.c @@ -424,10 +424,15 @@ static inline void msr_read(DisasContext *dc, TCGv d) static inline void msr_write(DisasContext *dc, TCGv v) { + TCGv t; + + t = tcg_temp_new(); dc->cpustate_changed = 1; - tcg_gen_mov_tl(cpu_SR[SR_MSR], v); - /* PVR, we have a processor version register. */ - tcg_gen_ori_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], (1 << 10)); + /* PVR bit is not writable. */ + tcg_gen_andi_tl(t, v, ~(1 << 10)); + tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], (1 << 10)); + tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], v); + tcg_temp_free(t); } static void dec_msr(DisasContext *dc) -- 2.7.4