[Qemu-devel] [PATCH 23/38] target/hppa: Implement P*TLB and P*TLBE insns

[Richard Henderson <richard.henderson@linaro.org>]

We now have all of the TLB manipulation instructions.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/hppa/helper.h     |  2 ++
 target/hppa/mem_helper.c | 37 +++++++++++++++++++++++++++++++++++++
 target/hppa/translate.c  | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 79 insertions(+)

diff --git a/target/hppa/helper.h b/target/hppa/helper.h
index d412093914..f059ddf3b9 100644
--- a/target/hppa/helper.h
+++ b/target/hppa/helper.h
@@ -88,4 +88,6 @@ DEF_HELPER_FLAGS_2(write_eiem, TCG_CALL_NO_RWG, void, env, tr)
 DEF_HELPER_FLAGS_2(swap_system_mask, TCG_CALL_NO_RWG, tr, env, tr)
 DEF_HELPER_FLAGS_3(itlba, TCG_CALL_NO_RWG, void, env, tl, tr)
 DEF_HELPER_FLAGS_3(itlbp, TCG_CALL_NO_RWG, void, env, tl, tr)
+DEF_HELPER_FLAGS_2(ptlb, TCG_CALL_NO_RWG, void, env, tl)
+DEF_HELPER_FLAGS_1(ptlbe, TCG_CALL_NO_RWG, void, env)
 #endif
diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c
index 9d4bf132d6..b5e2e35908 100644
--- a/target/hppa/mem_helper.c
+++ b/target/hppa/mem_helper.c
@@ -268,4 +268,41 @@ void HELPER(itlbp)(CPUHPPAState *env, target_ulong addr, target_ureg reg)
     ent->t = extract32(reg, 29, 1);
     ent->entry_valid = 1;
 }
+
+/* Purge (Insn/Data) TLB.  This is explicitly page-based, and is
+   synchronous across all processors.  */
+static void ptlb_work(CPUState *cpu, run_on_cpu_data data)
+{
+    CPUHPPAState *env = cpu->env_ptr;
+    target_ulong addr = (target_ulong) data.target_ptr;
+    hppa_tlb_entry *ent = hppa_find_tlb(env, addr);
+
+    if (ent && ent->entry_valid) {
+        hppa_flush_tlb_ent(env, ent);
+    }
+}
+
+void HELPER(ptlb)(CPUHPPAState *env, target_ulong addr)
+{
+    CPUState *src = CPU(hppa_env_get_cpu(env));
+    CPUState *cpu;
+    run_on_cpu_data data = RUN_ON_CPU_TARGET_PTR(addr);
+
+    CPU_FOREACH(cpu) {
+        if (cpu != src) {
+            async_run_on_cpu(cpu, ptlb_work, data);
+        }
+    }
+    async_safe_run_on_cpu(src, ptlb_work, data);
+}
+
+/* Purge (Insn/Data) TLB entry.  This affects an implementation-defined
+   number of pages/entries (we choose all), and is local to the cpu.  */
+void HELPER(ptlbe)(CPUHPPAState *env)
+{
+    CPUState *src = CPU(hppa_env_get_cpu(env));
+
+    memset(env->tlb, 0, sizeof(env->tlb));
+    tlb_flush_by_mmuidx(src, 0xf);
+}
 #endif /* CONFIG_USER_ONLY */
diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index 13ac727583..2c3c582913 100644
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -2388,6 +2388,42 @@ static DisasJumpType trans_ixtlbx(DisasContext *ctx, uint32_t insn,
     return nullify_end(ctx, !is_data && (ctx->base.tb->flags & PSW_C)
                        ? DISAS_IAQ_N_STALE : DISAS_NEXT);
 }
+
+static DisasJumpType trans_pxtlbx(DisasContext *ctx, uint32_t insn,
+                                  const DisasInsn *di)
+{
+    unsigned m = extract32(insn, 5, 1);
+    unsigned sp;
+    unsigned rx = extract32(insn, 16, 5);
+    unsigned rb = extract32(insn, 21, 5);
+    unsigned is_data = insn & 0x1000;
+    unsigned is_local = insn & 0x40;
+    TCGv_tl addr;
+    TCGv_reg ofs;
+
+    if (is_data) {
+        sp = extract32(insn, 14, 2);
+    } else {
+        sp = ~assemble_sr3(insn);
+    }
+
+    CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR);
+    nullify_over(ctx);
+
+    form_gva(ctx, &addr, &ofs, rb, rx, 0, 0, sp, m, false);
+    if (m) {
+        save_gpr(ctx, rb, ofs);
+    }
+    if (is_local) {
+        gen_helper_ptlbe(cpu_env);
+    } else {
+        gen_helper_ptlb(cpu_env, addr);
+    }
+
+    /* Exit TB for TLB change if mmu is enabled.  */
+    return nullify_end(ctx, !is_data && (ctx->base.tb->flags & PSW_C)
+                       ? DISAS_IAQ_N_STALE : DISAS_NEXT);
+}
 #endif /* !CONFIG_USER_ONLY */
 
 static const DisasInsn table_mem_mgmt[] = {
@@ -2411,6 +2447,10 @@ static const DisasInsn table_mem_mgmt[] = {
     { 0x04000040u, 0xfc001fffu, trans_ixtlbx },       /* iitlba */
     { 0x04001000u, 0xfc001fffu, trans_ixtlbx },       /* idtlbp */
     { 0x04001040u, 0xfc001fffu, trans_ixtlbx },       /* idtlba */
+    { 0x04000200u, 0xfc001fdfu, trans_pxtlbx },       /* pitlb */
+    { 0x04000240u, 0xfc001fdfu, trans_pxtlbx },       /* pitlbe */
+    { 0x04001200u, 0xfc001fdfu, trans_pxtlbx },       /* pdtlb */
+    { 0x04001240u, 0xfc001fdfu, trans_pxtlbx },       /* pdtlbe */
 #endif
 };
 
-- 
2.14.3