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[Qemu-devel] [5327] Implement UA2005 hypervisor traps

Subject: [Qemu-devel] [5327] Implement UA2005 hypervisor traps
From: Blue Swirl
Date: Fri, 26 Sep 2008 18:05:29 +0000
Revision: 5327
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5327
Author:   blueswir1
Date:     2008-09-26 18:05:23 +0000 (Fri, 26 Sep 2008)

Log Message:
-----------
Implement UA2005 hypervisor traps

Modified Paths:
--------------
    trunk/target-sparc/helper.h
    trunk/target-sparc/op_helper.c
    trunk/target-sparc/translate.c

Modified: trunk/target-sparc/helper.h
===================================================================
--- trunk/target-sparc/helper.h 2008-09-26 18:02:48 UTC (rev 5326)
+++ trunk/target-sparc/helper.h 2008-09-26 18:05:23 UTC (rev 5327)
@@ -38,8 +38,6 @@
 DEF_HELPER(uint64_t, helper_tick_get_count, (void *opaque))
 DEF_HELPER(void, helper_tick_set_limit, (void *opaque, uint64_t limit))
 #endif
-DEF_HELPER(void, helper_trap, (target_ulong nb_trap))
-DEF_HELPER(void, helper_trapcc, (target_ulong nb_trap, target_ulong do_trap))
 DEF_HELPER(void, helper_check_align, (target_ulong addr, uint32_t align))
 DEF_HELPER(void, helper_debug, (void))
 DEF_HELPER(void, helper_save, (void))

Modified: trunk/target-sparc/op_helper.c
===================================================================
--- trunk/target-sparc/op_helper.c      2008-09-26 18:02:48 UTC (rev 5326)
+++ trunk/target-sparc/op_helper.c      2008-09-26 18:05:23 UTC (rev 5327)
@@ -55,20 +55,6 @@
     cpu_loop_exit();
 }
 
-void helper_trap(target_ulong nb_trap)
-{
-    env->exception_index = TT_TRAP + (nb_trap & 0x7f);
-    cpu_loop_exit();
-}
-
-void helper_trapcc(target_ulong nb_trap, target_ulong do_trap)
-{
-    if (do_trap) {
-        env->exception_index = TT_TRAP + (nb_trap & 0x7f);
-        cpu_loop_exit();
-    }
-}
-
 static inline void set_cwp(int new_cwp)
 {
     cpu_set_cwp(env, new_cwp);

Modified: trunk/target-sparc/translate.c
===================================================================
--- trunk/target-sparc/translate.c      2008-09-26 18:02:48 UTC (rev 5326)
+++ trunk/target-sparc/translate.c      2008-09-26 18:05:23 UTC (rev 5327)
@@ -93,6 +93,9 @@
 #define QFPREG(r) (r & 0x1c)
 #endif
 
+#define UA2005_HTRAP_MASK 0xff
+#define V8_TRAP_MASK 0x7f
+
 static int sign_extend(int x, int len)
 {
     len = 32 - len;
@@ -2019,9 +2022,16 @@
                 cond = GET_FIELD(insn, 3, 6);
                 if (cond == 0x8) {
                     save_state(dc, cpu_cond);
-                    tcg_gen_helper_0_1(helper_trap, cpu_dst);
+                    if ((dc->def->features & CPU_FEATURE_HYPV) &&
+                        supervisor(dc))
+                        tcg_gen_andi_tl(cpu_dst, cpu_dst, UA2005_HTRAP_MASK);
+                    else
+                        tcg_gen_andi_tl(cpu_dst, cpu_dst, V8_TRAP_MASK);
+                    tcg_gen_addi_tl(cpu_dst, cpu_dst, TT_TRAP);
+                    tcg_gen_helper_0_1(raise_exception, cpu_dst);
                 } else if (cond != 0) {
                     TCGv r_cond = tcg_temp_new(TCG_TYPE_TL);
+                    int l1;
 #ifdef TARGET_SPARC64
                     /* V9 icc/xcc */
                     int cc = GET_FIELD_SP(insn, 11, 12);
@@ -2037,7 +2047,18 @@
                     save_state(dc, cpu_cond);
                     gen_cond(r_cond, 0, cond);
 #endif
-                    tcg_gen_helper_0_2(helper_trapcc, cpu_dst, r_cond);
+                    l1 = gen_new_label();
+                    tcg_gen_brcondi_tl(TCG_COND_EQ, r_cond, 0, l1);
+
+                    if ((dc->def->features & CPU_FEATURE_HYPV) &&
+                        supervisor(dc))
+                        tcg_gen_andi_tl(cpu_dst, cpu_dst, UA2005_HTRAP_MASK);
+                    else
+                        tcg_gen_andi_tl(cpu_dst, cpu_dst, V8_TRAP_MASK);
+                    tcg_gen_addi_tl(cpu_dst, cpu_dst, TT_TRAP);
+                    tcg_gen_helper_0_1(raise_exception, cpu_dst);
+
+                    gen_set_label(l1);
                     tcg_temp_free(r_cond);
                 }
                 gen_op_next_insn();




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