[Qemu-devel] [PATCH] better SuperSPARC emulation

[Robert Reif]

Add better SuperSPARC processor emulation.

With this patch, openboot is able to detect the SuperSPARC processor 
revision and cache size properly.
Index: target-sparc/helper.c
===================================================================
--- target-sparc/helper.c       (revision 6121)
+++ target-sparc/helper.c       (working copy)
@@ -688,6 +688,7 @@
 #if !defined(TARGET_SPARC64)
     env->mmuregs[0] |= def->mmu_version;
     cpu_sparc_set_id(env, 0);
+    env->mxccregs[7] |= def->mxcc_version;
 #else
     env->mmu_version = def->mmu_version;
     env->maxtl = def->maxtl;
@@ -972,19 +973,6 @@
         CPU_FEATURE_FSMULD,
     },
     {
-        .name = "TI SuperSparc II",
-        .iu_version = 0x40000000,
-        .fpu_version = 0 << 17,
-        .mmu_version = 0x04000000,
-        .mmu_bm = 0x00002000,
-        .mmu_ctpr_mask = 0xffffffc0,
-        .mmu_cxr_mask = 0x0000ffff,
-        .mmu_sfsr_mask = 0xffffffff,
-        .mmu_trcr_mask = 0xffffffff,
-        .nwindows = 8,
-        .features = CPU_DEFAULT_FEATURES,
-    },
-    {
         .name = "TI MicroSparc I",
         .iu_version = 0x41000000,
         .fpu_version = 4 << 17,
@@ -1027,9 +1015,9 @@
     },
     {
         .name = "TI SuperSparc 40", // STP1020NPGA
-        .iu_version = 0x41000000,
+        .iu_version = 0x41000000, // SuperSPARC 2.x
         .fpu_version = 0 << 17,
-        .mmu_version = 0x00000000,
+        .mmu_version = 0x00000800, // SuperSPARC 2.x, no MXCC
         .mmu_bm = 0x00002000,
         .mmu_ctpr_mask = 0xffffffc0,
         .mmu_cxr_mask = 0x0000ffff,
@@ -1040,9 +1028,9 @@
     },
     {
         .name = "TI SuperSparc 50", // STP1020PGA
-        .iu_version = 0x40000000,
+        .iu_version = 0x40000000, // SuperSPARC 3.x
         .fpu_version = 0 << 17,
-        .mmu_version = 0x04000000,
+        .mmu_version = 0x01000800, // SuperSPARC 3.x, no MXCC
         .mmu_bm = 0x00002000,
         .mmu_ctpr_mask = 0xffffffc0,
         .mmu_cxr_mask = 0x0000ffff,
@@ -1053,22 +1041,23 @@
     },
     {
         .name = "TI SuperSparc 51",
-        .iu_version = 0x43000000,
+        .iu_version = 0x40000000, // SuperSPARC 3.x
         .fpu_version = 0 << 17,
-        .mmu_version = 0x04000000,
+        .mmu_version = 0x01000000, // SuperSPARC 3.x, MXCC
         .mmu_bm = 0x00002000,
         .mmu_ctpr_mask = 0xffffffc0,
         .mmu_cxr_mask = 0x0000ffff,
         .mmu_sfsr_mask = 0xffffffff,
         .mmu_trcr_mask = 0xffffffff,
+        .mxcc_version = 0x00000104,
         .nwindows = 8,
         .features = CPU_DEFAULT_FEATURES,
     },
     {
         .name = "TI SuperSparc 60", // STP1020APGA
-        .iu_version = 0x40000000,
+        .iu_version = 0x40000000, // SuperSPARC 3.x
         .fpu_version = 0 << 17,
-        .mmu_version = 0x03000000,
+        .mmu_version = 0x01000800, // SuperSPARC 3.x, no MXCC
         .mmu_bm = 0x00002000,
         .mmu_ctpr_mask = 0xffffffc0,
         .mmu_cxr_mask = 0x0000ffff,
@@ -1079,18 +1068,33 @@
     },
     {
         .name = "TI SuperSparc 61",
-        .iu_version = 0x44000000,
+        .iu_version = 0x44000000, // SuperSPARC 3.x
         .fpu_version = 0 << 17,
-        .mmu_version = 0x04000000,
+        .mmu_version = 0x01000000, // SuperSPARC 3.x, MXCC
         .mmu_bm = 0x00002000,
         .mmu_ctpr_mask = 0xffffffc0,
         .mmu_cxr_mask = 0x0000ffff,
         .mmu_sfsr_mask = 0xffffffff,
         .mmu_trcr_mask = 0xffffffff,
+        .mxcc_version = 0x00000104,
         .nwindows = 8,
         .features = CPU_DEFAULT_FEATURES,
     },
     {
+        .name = "TI SuperSparc II",
+        .iu_version = 0x40000000, // SuperSPARC II 1.x
+        .fpu_version = 0 << 17,
+        .mmu_version = 0x08000000, // SuperSPARC II 1.x, MXCC
+        .mmu_bm = 0x00002000,
+        .mmu_ctpr_mask = 0xffffffc0,
+        .mmu_cxr_mask = 0x0000ffff,
+        .mmu_sfsr_mask = 0xffffffff,
+        .mmu_trcr_mask = 0xffffffff,
+        .mxcc_version = 0x00000104,
+        .nwindows = 8,
+        .features = CPU_DEFAULT_FEATURES,
+    },
+    {
         .name = "Ross RT625",
         .iu_version = 0x1e000000,
         .fpu_version = 1 << 17,
Index: target-sparc/cpu.h
===================================================================
--- target-sparc/cpu.h  (revision 6121)
+++ target-sparc/cpu.h  (working copy)
@@ -210,6 +210,7 @@
     uint32_t mmu_cxr_mask;
     uint32_t mmu_sfsr_mask;
     uint32_t mmu_trcr_mask;
+    uint32_t mxcc_version;
     uint32_t features;
     uint32_t nwindows;
     uint32_t maxtl;