From bdeade4633d41d76e0c22b3810241bbf7cb5a8a3 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sat, 14 Jan 2012 17:50:23 +0200
Subject: [PATCH] drc: allow translation cache in data segment

useful for Android
---
 libpcsxcore/new_dynarec/assem_arm.c   |  6 +++++-
 libpcsxcore/new_dynarec/assem_arm.h   | 14 +++++++++++++-
 libpcsxcore/new_dynarec/new_dynarec.c | 14 +++++++++++---
 3 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/libpcsxcore/new_dynarec/assem_arm.c b/libpcsxcore/new_dynarec/assem_arm.c
index 3950d224..0b7cee82 100644
--- a/libpcsxcore/new_dynarec/assem_arm.c
+++ b/libpcsxcore/new_dynarec/assem_arm.c
@@ -29,6 +29,10 @@
 #include "pcnt.h"
 #endif
 
+#ifndef BASE_ADDR_FIXED
+char translation_cache[1 << TARGET_SIZE_2] __attribute__((aligned(4096)));
+#endif
+
 extern int cycle_count;
 extern int last_count;
 extern int pcaddr;
@@ -5680,7 +5684,7 @@ void do_clear_cache()
       for(j=0;j<32;j++) 
       {
         if(bitmap&(1<<j)) {
-          start=BASE_ADDR+i*131072+j*4096;
+          start=(u_int)BASE_ADDR+i*131072+j*4096;
           end=start+4095;
           j++;
           while(j<32) {
diff --git a/libpcsxcore/new_dynarec/assem_arm.h b/libpcsxcore/new_dynarec/assem_arm.h
index 917d2761..7ed8caff 100644
--- a/libpcsxcore/new_dynarec/assem_arm.h
+++ b/libpcsxcore/new_dynarec/assem_arm.h
@@ -22,6 +22,10 @@
 //#undef USE_MINI_HT
 #endif
 
+#ifndef __ANDROID__
+#define BASE_ADDR_FIXED 1
+#endif
+
 #ifdef FORCE32
 #define REG_SHIFT 2
 #else
@@ -54,8 +58,16 @@
 
 extern char *invc_ptr;
 
-#define BASE_ADDR 0x1000000 // Code generator target address
 #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
 
+// Code generator target address
+#ifdef BASE_ADDR_FIXED
+// "round" address helpful for debug
+#define BASE_ADDR 0x1000000
+#else
+extern char translation_cache[1 << TARGET_SIZE_2];
+#define BASE_ADDR translation_cache
+#endif
+
 // This is defined in linkage_arm.s, but gcc -O3 likes this better
 #define rdram ((unsigned int *)0x80000000)
diff --git a/libpcsxcore/new_dynarec/new_dynarec.c b/libpcsxcore/new_dynarec/new_dynarec.c
index b6af4c4b..cafa4a42 100644
--- a/libpcsxcore/new_dynarec/new_dynarec.c
+++ b/libpcsxcore/new_dynarec/new_dynarec.c
@@ -7993,10 +7993,16 @@ void new_dynarec_init()
 {
   printf("Init new dynarec\n");
   out=(u_char *)BASE_ADDR;
+#ifdef BASE_ADDR_FIXED
   if (mmap (out, 1<<TARGET_SIZE_2,
             PROT_READ | PROT_WRITE | PROT_EXEC,
             MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
             -1, 0) <= 0) {printf("mmap() failed\n");}
+#else
+  // not all systems allow execute in data segment by default
+  if (mprotect(out, 1<<TARGET_SIZE_2, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
+    printf("mprotect() failed\n");
+#endif
 #ifdef MUPEN64
   rdword=&readmem_dword;
   fake_pc.f.r.rs=&readmem_dword;
@@ -8055,7 +8061,9 @@ void new_dynarec_init()
 void new_dynarec_cleanup()
 {
   int n;
+  #ifdef BASE_ADDR_FIXED
   if (munmap ((void *)BASE_ADDR, 1<<TARGET_SIZE_2) < 0) {printf("munmap() failed\n");}
+  #endif
   for(n=0;n<4096;n++) ll_clear(jump_in+n);
   for(n=0;n<4096;n++) ll_clear(jump_out+n);
   for(n=0;n<4096;n++) ll_clear(jump_dirty+n);
@@ -11543,7 +11551,7 @@ int new_recompile_block(int addr)
   
   // If we're within 256K of the end of the buffer,
   // start over from the beginning. (Is 256K enough?)
-  if((int)out>BASE_ADDR+(1<<TARGET_SIZE_2)-MAX_OUTPUT_BLOCK_SIZE) out=(u_char *)BASE_ADDR;
+  if((u_int)out>(u_int)BASE_ADDR+(1<<TARGET_SIZE_2)-MAX_OUTPUT_BLOCK_SIZE) out=(u_char *)BASE_ADDR;
   
   // Trap writes to any of the pages we compiled
   for(i=start>>12;i<=(start+slen*4)>>12;i++) {
@@ -11571,11 +11579,11 @@ int new_recompile_block(int addr)
   
   /* Pass 10 - Free memory by expiring oldest blocks */
   
-  int end=((((int)out-BASE_ADDR)>>(TARGET_SIZE_2-16))+16384)&65535;
+  int end=((((int)out-(int)BASE_ADDR)>>(TARGET_SIZE_2-16))+16384)&65535;
   while(expirep!=end)
   {
     int shift=TARGET_SIZE_2-3; // Divide into 8 blocks
-    int base=BASE_ADDR+((expirep>>13)<<shift); // Base address of this block
+    int base=(int)BASE_ADDR+((expirep>>13)<<shift); // Base address of this block
     inv_debug("EXP: Phase %d\n",expirep);
     switch((expirep>>11)&3)
     {
-- 
2.39.2