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-rw-r--r--target-tilegx/cpu.h2
-rw-r--r--target-tilegx/helper.c22
-rw-r--r--target-tilegx/helper.h1
-rw-r--r--target-tilegx/translate.c14
4 files changed, 38 insertions, 1 deletions
diff --git a/target-tilegx/cpu.h b/target-tilegx/cpu.h
index 6f04fe7fb2..6c0fd5365d 100644
--- a/target-tilegx/cpu.h
+++ b/target-tilegx/cpu.h
@@ -53,6 +53,8 @@ enum {
TILEGX_SPR_CMPEXCH = 0,
TILEGX_SPR_CRITICAL_SEC = 1,
TILEGX_SPR_SIM_CONTROL = 2,
+ TILEGX_SPR_EX_CONTEXT_0_0 = 3,
+ TILEGX_SPR_EX_CONTEXT_0_1 = 4,
TILEGX_SPR_COUNT
};
diff --git a/target-tilegx/helper.c b/target-tilegx/helper.c
index 36b287f84a..dda821f5cb 100644
--- a/target-tilegx/helper.c
+++ b/target-tilegx/helper.c
@@ -22,6 +22,7 @@
#include "qemu-common.h"
#include "exec/helper-proto.h"
#include <zlib.h> /* For crc32 */
+#include "syscall_defs.h"
void helper_exception(CPUTLGState *env, uint32_t excp)
{
@@ -31,6 +32,27 @@ void helper_exception(CPUTLGState *env, uint32_t excp)
cpu_loop_exit(cs);
}
+void helper_ext01_ics(CPUTLGState *env)
+{
+ uint64_t val = env->spregs[TILEGX_SPR_EX_CONTEXT_0_1];
+
+ switch (val) {
+ case 0:
+ case 1:
+ env->spregs[TILEGX_SPR_CRITICAL_SEC] = val;
+ break;
+ default:
+#if defined(CONFIG_USER_ONLY)
+ env->signo = TARGET_SIGILL;
+ env->sigcode = TARGET_ILL_ILLOPC;
+ helper_exception(env, TILEGX_EXCP_SIGNAL);
+#else
+ helper_exception(env, TILEGX_EXCP_OPCODE_UNIMPLEMENTED);
+#endif
+ break;
+ }
+}
+
uint64_t helper_cntlz(uint64_t arg)
{
return clz64(arg);
diff --git a/target-tilegx/helper.h b/target-tilegx/helper.h
index bbcc4761eb..9281d0f428 100644
--- a/target-tilegx/helper.h
+++ b/target-tilegx/helper.h
@@ -1,4 +1,5 @@
DEF_HELPER_2(exception, noreturn, env, i32)
+DEF_HELPER_1(ext01_ics, void, env)
DEF_HELPER_FLAGS_1(cntlz, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_1(cnttz, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_1(pcnt, TCG_CALL_NO_RWG_SE, i64, i64)
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index ab3fc81b7f..acb9ec480c 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -529,6 +529,15 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
/* ??? This should yield, especially in system mode. */
mnemonic = "nap";
goto done0;
+ case OE_RR_X1(IRET):
+ gen_helper_ext01_ics(cpu_env);
+ dc->jmp.cond = TCG_COND_ALWAYS;
+ dc->jmp.dest = tcg_temp_new();
+ tcg_gen_ld_tl(dc->jmp.dest, cpu_env,
+ offsetof(CPUTLGState, spregs[TILEGX_SPR_EX_CONTEXT_0_0]));
+ tcg_gen_andi_tl(dc->jmp.dest, dc->jmp.dest, ~7);
+ mnemonic = "iret";
+ goto done0;
case OE_RR_X1(SWINT0):
case OE_RR_X1(SWINT2):
case OE_RR_X1(SWINT3):
@@ -606,7 +615,6 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
break;
case OE_RR_X0(FSINGLE_PACK1):
case OE_RR_Y0(FSINGLE_PACK1):
- case OE_RR_X1(IRET):
return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
case OE_RR_X1(LD1S):
memop = MO_SB;
@@ -1947,6 +1955,10 @@ static const TileSPR *find_spr(unsigned spr)
offsetof(CPUTLGState, spregs[TILEGX_SPR_CRITICAL_SEC]), 0, 0)
D(SIM_CONTROL,
offsetof(CPUTLGState, spregs[TILEGX_SPR_SIM_CONTROL]), 0, 0)
+ D(EX_CONTEXT_0_0,
+ offsetof(CPUTLGState, spregs[TILEGX_SPR_EX_CONTEXT_0_0]), 0, 0)
+ D(EX_CONTEXT_0_1,
+ offsetof(CPUTLGState, spregs[TILEGX_SPR_EX_CONTEXT_0_1]), 0, 0)
}
#undef D