From bbe57a66cad1b4159f351bf55f84c97040b04753 Mon Sep 17 00:00:00 2001
From: James Rowe <jroweboy@gmail.com>
Date: Thu, 24 Nov 2016 12:42:32 -0700
Subject: Expose page table to dynarmic for optimized reads and writes to the
 JIT

---
 src/core/memory.cpp | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'src/core/memory.cpp')

diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index 64c388374..65e4bba85 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -45,13 +45,11 @@ struct SpecialRegion {
  * requires an indexed fetch and a check for NULL.
  */
 struct PageTable {
-    static const size_t NUM_ENTRIES = 1 << (32 - PAGE_BITS);
-
     /**
      * Array of memory pointers backing each page. An entry can only be non-null if the
      * corresponding entry in the `attributes` array is of type `Memory`.
      */
-    std::array<u8*, NUM_ENTRIES> pointers;
+    std::array<u8*, PAGE_TABLE_NUM_ENTRIES> pointers;
 
     /**
      * Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of
@@ -63,13 +61,13 @@ struct PageTable {
      * Array of fine grained page attributes. If it is set to any value other than `Memory`, then
      * the corresponding entry in `pointers` MUST be set to null.
      */
-    std::array<PageType, NUM_ENTRIES> attributes;
+    std::array<PageType, PAGE_TABLE_NUM_ENTRIES> attributes;
 
     /**
      * Indicates the number of externally cached resources touching a page that should be
      * flushed before the memory is accessed
      */
-    std::array<u8, NUM_ENTRIES> cached_res_count;
+    std::array<u8, PAGE_TABLE_NUM_ENTRIES> cached_res_count;
 };
 
 /// Singular page table used for the singleton process
@@ -77,6 +75,10 @@ static PageTable main_page_table;
 /// Currently active page table
 static PageTable* current_page_table = &main_page_table;
 
+std::array<u8*, PAGE_TABLE_NUM_ENTRIES>* GetCurrentPageTablePointers() {
+    return &current_page_table->pointers;
+}
+
 static void MapPages(u32 base, u32 size, u8* memory, PageType type) {
     LOG_DEBUG(HW_Memory, "Mapping %p onto %08X-%08X", memory, base * PAGE_SIZE,
               (base + size) * PAGE_SIZE);
@@ -84,7 +86,7 @@ static void MapPages(u32 base, u32 size, u8* memory, PageType type) {
     u32 end = base + size;
 
     while (base != end) {
-        ASSERT_MSG(base < PageTable::NUM_ENTRIES, "out of range mapping at %08X", base);
+        ASSERT_MSG(base < PAGE_TABLE_NUM_ENTRIES, "out of range mapping at %08X", base);
 
         // Since pages are unmapped on shutdown after video core is shutdown, the renderer may be
         // null here
-- 
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