added code to LCD modules keep track of framebuffer location in FCRAM or VRAM

1 files changed, 90 insertions, 1 deletions

diff --git a/src/core/hw/lcd.cpp b/src/core/hw/lcd.cpp
index 822cd164..6468053f 100644
--- a/src/core/hw/lcd.cpp
+++ b/src/core/hw/lcd.cpp
@@ -6,19 +6,107 @@
 #include "common/log.h"
 
 #include "core/core.h"
+#include "core/mem_map.h"
 #include "core/hw/lcd.h"
 
 #include "video_core/video_core.h"
 
 namespace LCD {
 
+Registers g_regs;
+
 static const u32 kFrameTicks = 268123480 / 60;  ///< 268MHz / 60 frames per second
 
 u64 g_last_ticks = 0; ///< Last CPU ticks
 
+/**
+ * Sets whether the framebuffers are in the GSP heap (FCRAM) or VRAM
+ * @param 
+ */
+void SetFramebufferLocation(const FramebufferLocation mode) {
+    switch (mode) {
+    case FRAMEBUFFER_LOCATION_FCRAM:
+        g_regs.framebuffer_top_left_1   = PADDR_TOP_LEFT_FRAME1;
+        g_regs.framebuffer_top_left_2   = PADDR_TOP_LEFT_FRAME2;
+        g_regs.framebuffer_top_right_1  = PADDR_TOP_RIGHT_FRAME1;
+        g_regs.framebuffer_top_right_2  = PADDR_TOP_RIGHT_FRAME2;
+        g_regs.framebuffer_sub_left_1   = PADDR_SUB_FRAME1;
+        //g_regs.framebuffer_sub_left_2  = unknown;
+        g_regs.framebuffer_sub_right_1  = PADDR_SUB_FRAME2;
+        //g_regs.framebufferr_sub_right_2 = unknown;
+        break;
+
+    case FRAMEBUFFER_LOCATION_VRAM:
+        g_regs.framebuffer_top_left_1   = PADDR_VRAM_TOP_LEFT_FRAME1;
+        g_regs.framebuffer_top_left_2   = PADDR_VRAM_TOP_LEFT_FRAME2;
+        g_regs.framebuffer_top_right_1  = PADDR_VRAM_TOP_RIGHT_FRAME1;
+        g_regs.framebuffer_top_right_2  = PADDR_VRAM_TOP_RIGHT_FRAME2;
+        g_regs.framebuffer_sub_left_1   = PADDR_VRAM_SUB_FRAME1;
+        //g_regs.framebuffer_sub_left_2  = unknown;
+        g_regs.framebuffer_sub_right_1  = PADDR_VRAM_SUB_FRAME2;
+        //g_regs.framebufferr_sub_right_2 = unknown;
+        break;
+    }
+}
+
+/**
+ * Gets the location of the framebuffers
+ * @return Location of framebuffers as FramebufferLocation enum
+ */
+const FramebufferLocation GetFramebufferLocation() {
+    if ((g_regs.framebuffer_top_right_1 & ~Memory::VRAM_MASK) == Memory::VRAM_PADDR) {
+        return FRAMEBUFFER_LOCATION_VRAM;
+    } else if ((g_regs.framebuffer_top_right_1 & ~Memory::FCRAM_MASK) == Memory::FCRAM_PADDR) {
+        return FRAMEBUFFER_LOCATION_FCRAM;
+    } else {
+        ERROR_LOG(LCD, "unknown framebuffer location!");
+    }
+    return FRAMEBUFFER_LOCATION_UNKNOWN;
+}
+
+/**
+ * Gets a read-only pointer to a framebuffer in memory
+ * @param address Physical address of framebuffer
+ * @return Returns const pointer to raw framebuffer
+ */
+const u8* GetFramebufferPointer(const u32 address) {
+    switch (GetFramebufferLocation()) {
+    case FRAMEBUFFER_LOCATION_FCRAM:
+        return (const u8*)Memory::GetPointer(Memory::VirtualAddressFromPhysical_FCRAM(address));
+    case FRAMEBUFFER_LOCATION_VRAM:
+        return (const u8*)Memory::GetPointer(Memory::VirtualAddressFromPhysical_VRAM(address));
+    default:
+        ERROR_LOG(LCD, "unknown framebuffer location");
+    }
+    return NULL;
+}
+
 template <typename T>
 inline void Read(T &var, const u32 addr) {
-    ERROR_LOG(LCD, "unknown Read%d @ 0x%08X", sizeof(var) * 8, addr);
+    switch (addr) {
+    case REG_FRAMEBUFFER_TOP_LEFT_1:
+        var = g_regs.framebuffer_top_left_1;
+        break;
+    case REG_FRAMEBUFFER_TOP_LEFT_2:
+        var = g_regs.framebuffer_top_left_2;
+        break;
+    case REG_FRAMEBUFFER_TOP_RIGHT_1:
+        var = g_regs.framebuffer_top_right_1;
+        break;
+    case REG_FRAMEBUFFER_TOP_RIGHT_2:
+        var = g_regs.framebuffer_top_right_2;
+        break;
+    case REG_FRAMEBUFFER_SUB_LEFT_1:
+        var = g_regs.framebuffer_sub_left_1;
+        break;
+    case REG_FRAMEBUFFER_SUB_RIGHT_1:
+        var = g_regs.framebuffer_sub_right_1;
+        break;
+    default:
+        ERROR_LOG(LCD, "unknown Read%d @ 0x%08X", sizeof(var) * 8, addr);
+        break;
+    }
+    
 }
 
 template <typename T>
@@ -51,6 +139,7 @@ void Update() {
 /// Initialize hardware
 void Init() {
     g_last_ticks = Core::g_app_core->GetTicks();
+    SetFramebufferLocation(FRAMEBUFFER_LOCATION_FCRAM);
     NOTICE_LOG(LCD, "initialized OK");
 }