From 5ef54116ea1c576995f0074b71400bf7bda08cf1 Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Tue, 18 Jul 2006 21:14:09 +0000
Subject: [PATCH] Sparc64 user emulator fixes (Blue Swirl)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2063 c046a42c-6fe2-441c-8c8c-71466251a162
---
 linux-user/elfload.c     |  8 +++++---
 linux-user/main.c        | 22 ++++++++++++++++++++++
 target-sparc/translate.c |  4 ++++
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 687ff77b4d..57b5ed27d8 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -135,11 +135,13 @@ enum
 
 #define ELF_START_MMAP 0x80000000
 
-#define elf_check_arch(x) ( (x) == EM_SPARC )
+#define elf_check_arch(x) ( (x) == EM_SPARCV9 )
 
 #define ELF_CLASS   ELFCLASS64
 #define ELF_DATA    ELFDATA2MSB
-#define ELF_ARCH    EM_SPARC
+#define ELF_ARCH    EM_SPARCV9
+
+#define STACK_BIAS		2047
 
 static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
 {
@@ -147,7 +149,7 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
     regs->pc = infop->entry;
     regs->npc = regs->pc + 4;
     regs->y = 0;
-    regs->u_regs[14] = infop->start_stack - 16 * 4;
+    regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
 }
 
 #else
diff --git a/linux-user/main.c b/linux-user/main.c
index 6c3d5db7ee..d1693110fa 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -473,11 +473,17 @@ static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 
 static void save_window(CPUSPARCState *env)
 {
+#ifndef TARGET_SPARC64
     unsigned int new_wim;
     new_wim = ((env->wim >> 1) | (env->wim << (NWINDOWS - 1))) &
         ((1LL << NWINDOWS) - 1);
     save_window_offset(env, (env->cwp - 2) & (NWINDOWS - 1));
     env->wim = new_wim;
+#else
+    save_window_offset(env, (env->cwp - 2) & (NWINDOWS - 1));
+    env->cansave++;
+    env->canrestore--;
+#endif
 }
 
 static void restore_window(CPUSPARCState *env)
@@ -500,6 +506,12 @@ static void restore_window(CPUSPARCState *env)
         sp_ptr += sizeof(target_ulong);
     }
     env->wim = new_wim;
+#ifdef TARGET_SPARC64
+    env->canrestore++;
+    if (env->cleanwin < NWINDOWS - 1)
+	env->cleanwin++;
+    env->cansave--;
+#endif
 }
 
 static void flush_windows(CPUSPARCState *env)
@@ -532,8 +544,12 @@ void cpu_loop (CPUSPARCState *env)
         trapnr = cpu_sparc_exec (env);
         
         switch (trapnr) {
+#ifndef TARGET_SPARC64
         case 0x88: 
         case 0x90:
+#else
+        case 0x16d:
+#endif
             ret = do_syscall (env, env->gregs[1],
                               env->regwptr[0], env->regwptr[1], 
                               env->regwptr[2], env->regwptr[3], 
@@ -574,6 +590,12 @@ void cpu_loop (CPUSPARCState *env)
             }
             break;
 #else
+        case TT_SPILL: /* window overflow */
+            save_window(env);
+            break;
+        case TT_FILL: /* window underflow */
+            restore_window(env);
+            break;
 	    // XXX
 #endif
         case EXCP_INTERRUPT:
diff --git a/target-sparc/translate.c b/target-sparc/translate.c
index 4a8ad7061b..a522d778be 100644
--- a/target-sparc/translate.c
+++ b/target-sparc/translate.c
@@ -2731,6 +2731,10 @@ void cpu_reset(CPUSPARCState *env)
     env->regwptr = env->regbase + (env->cwp * 16);
 #if defined(CONFIG_USER_ONLY)
     env->user_mode_only = 1;
+#ifdef TARGET_SPARC64
+    env->cleanwin = NWINDOWS - 1;
+    env->cansave = NWINDOWS - 1;
+#endif
 #else
     env->psrs = 1;
     env->psrps = 1;