target-tricore: Add softmmu support

Add basic softmmu support for TriCore

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-4-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 53 insertions, 1 deletions

diff --git a/target-tricore/helper.c b/target-tricore/helper.c
index ee7f0076c0..e4af6f1ac2 100644
--- a/target-tricore/helper.c
+++ b/target-tricore/helper.c
@@ -24,10 +24,62 @@
 
 #include "cpu.h"
 
+enum {
+    TLBRET_DIRTY = -4,
+    TLBRET_INVALID = -3,
+    TLBRET_NOMATCH = -2,
+    TLBRET_BADADDR = -1,
+    TLBRET_MATCH = 0
+};
+
+#if defined(CONFIG_SOFTMMU)
+static int get_physical_address(CPUTriCoreState *env, hwaddr *physical,
+                                int *prot, target_ulong address,
+                                int rw, int access_type)
+{
+    int ret = TLBRET_MATCH;
+
+    *physical = address & 0xFFFFFFFF;
+    *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+
+    return ret;
+}
+#endif
+
+/* TODO: Add exeption support*/
+static void raise_mmu_exception(CPUTriCoreState *env, target_ulong address,
+                                int rw, int tlb_error)
+{
+}
+
 int cpu_tricore_handle_mmu_fault(CPUState *cs, target_ulong address,
                                  int rw, int mmu_idx)
 {
-    return 0;
+    TriCoreCPU *cpu = TRICORE_CPU(cs);
+    CPUTriCoreState *env = &cpu->env;
+    hwaddr physical;
+    int prot;
+    int access_type;
+    int ret = 0;
+
+    rw &= 1;
+    access_type = ACCESS_INT;
+    ret = get_physical_address(env, &physical, &prot,
+                               address, rw, access_type);
+    qemu_log("%s address=" TARGET_FMT_lx " ret %d physical " TARGET_FMT_plx
+             " prot %d\n", __func__, address, ret, physical, prot);
+
+    if (ret == TLBRET_MATCH) {
+        tlb_set_page(cs, address & TARGET_PAGE_MASK,
+                     physical & TARGET_PAGE_MASK, prot | PAGE_EXEC,
+                     mmu_idx, TARGET_PAGE_SIZE);
+        ret = 0;
+    } else if (ret < 0) {
+        raise_mmu_exception(env, address, rw, ret);
+        ret = 1;
+    }
+
+    return ret;
 }
 
 void tricore_cpu_do_interrupt(CPUState *cs)