[Qemu-devel] [PATCH v4 53/55] linux-user: Add cpu_loop.c for nanoMIPS

[Aleksandar Markovic]

From: Dimitrije Nikolic <address@hidden>

Amend regular MIPS' cpu_loop.c to include nanoMIPS support.

Signed-off-by: Aleksandar Rikalo <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Stefan Markovic <address@hidden>
---
 linux-user/mips/cpu_loop.c     | 8 +++++++-
 linux-user/nanomips/cpu_loop.c | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)
 create mode 100644 linux-user/nanomips/cpu_loop.c

diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
index c9c20cf..ada5a79 100644
--- a/linux-user/mips/cpu_loop.c
+++ b/linux-user/mips/cpu_loop.c
@@ -546,7 +546,7 @@ void cpu_loop(CPUMIPSState *env)
                                  arg5, arg6, arg7, arg8);
             }
 done_syscall:
-# else
+# else /* N32/N64 and P32 */
             ret = do_syscall(env, env->active_tc.gpr[2],
                              env->active_tc.gpr[4], env->active_tc.gpr[5],
                              env->active_tc.gpr[6], env->active_tc.gpr[7],
@@ -562,6 +562,7 @@ done_syscall:
                    Avoid clobbering register state.  */
                 break;
             }
+#if !defined(TARGET_ABI_MIPSP32)
             if ((abi_ulong)ret >= (abi_ulong)-1133) {
                 env->active_tc.gpr[7] = 1; /* error flag */
                 ret = -ret;
@@ -569,6 +570,9 @@ done_syscall:
                 env->active_tc.gpr[7] = 0; /* error flag */
             }
             env->active_tc.gpr[2] = ret;
+#else
+            env->active_tc.gpr[4] = ret;
+#endif
             break;
         case EXCP_TLBL:
         case EXCP_TLBS:
@@ -714,6 +718,8 @@ done_syscall:
                     } else {
                         code = ((trap_instr >> 6) & ((1 << 10) - 1));
                     }
+                } else if (env->insn_flags & ISA_NANOMIPS32) {
+                    code = ((trap_instr >> 11) & ((1 << 5) - 1));
                 }
 
                 if (do_break(env, &info, code) != 0) {
diff --git a/linux-user/nanomips/cpu_loop.c b/linux-user/nanomips/cpu_loop.c
new file mode 100644
index 0000000..da4949a
--- /dev/null
+++ b/linux-user/nanomips/cpu_loop.c
@@ -0,0 +1 @@
+#include "../mips/cpu_loop.c"
-- 
2.7.4