From 253ab0f328b83609570e8b2107031fe7f6334e2f Mon Sep 17 00:00:00 2001
From: minjaesong <alswo9628@gmail.com>
Date: Fri, 15 Oct 2021 15:07:02 +0900
Subject: [PATCH] dma

---
 src/net/torvald/tsvm/AppLoader.java     |  2 +-
 src/net/torvald/tsvm/DMADelegate.kt     | 77 +++++++++++++++++++++++++
 src/net/torvald/tsvm/VMRunnerFactory.kt |  1 +
 3 files changed, 79 insertions(+), 1 deletion(-)
 create mode 100644 src/net/torvald/tsvm/DMADelegate.kt

diff --git a/src/net/torvald/tsvm/AppLoader.java b/src/net/torvald/tsvm/AppLoader.java
index 8ace1cc..dc3b70f 100644
--- a/src/net/torvald/tsvm/AppLoader.java
+++ b/src/net/torvald/tsvm/AppLoader.java
@@ -32,7 +32,7 @@ public class AppLoader {
 //        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{OEMBios.INSTANCE, BasicRom.INSTANCE});
 //        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{TandemBios.INSTANCE, BasicRom.INSTANCE});
 //        VM vm = new VM(128 << 10, new TheRealWorld(), new VMProgramRom[]{BasicBios.INSTANCE, WPBios.INSTANCE});
-        VM vm = new VM(128 << 10, new TheRealWorld(), new VMProgramRom[]{TsvmBios.INSTANCE});
+        VM vm = new VM(2048 << 10, new TheRealWorld(), new VMProgramRom[]{TsvmBios.INSTANCE});
 
         // uncomment to target the TerranBASIC runner
 //        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{TBASRelBios.INSTANCE});
diff --git a/src/net/torvald/tsvm/DMADelegate.kt b/src/net/torvald/tsvm/DMADelegate.kt
new file mode 100644
index 0000000..0318295
--- /dev/null
+++ b/src/net/torvald/tsvm/DMADelegate.kt
@@ -0,0 +1,77 @@
+package net.torvald.tsvm
+
+import net.torvald.UnsafeHelper
+import net.torvald.tsvm.peripheral.GraphicsAdapter
+
+/**
+ * Created by minjaesong on 2021-10-15.
+ */
+class DMADelegate(val vm: VM) {
+
+    private val READ = "READ".toByteArray(VM.CHARSET)
+    private val FLUSH = "FLUSH".toByteArray(VM.CHARSET)
+    private val CLOSE = "CLOSE".toByteArray(VM.CHARSET)
+
+    private fun WRITE(n: Int) = "WRITE$n".toByteArray(VM.CHARSET)
+
+    fun ramToFrame(from: Int, devnum: Int, offset: Int, length: Int) {
+        (vm.peripheralTable[devnum].peripheral as? GraphicsAdapter)?.let {
+            val data = ByteArray(length)
+            UnsafeHelper.memcpyRaw(null, vm.usermem.ptr + from, data, UnsafeHelper.getArrayOffset(data), length.toLong())
+            it.framebuffer.pixels.position(offset)
+            it.framebuffer.pixels.put(data)
+        }
+    }
+
+    fun ramToFrame(from: Int, to: Int, length: Int) {
+        for (i in 0..7) {
+            if (vm.peripheralTable[i].type == VM.PERITYPE_GPU_AND_TERM) {
+                ramToFrame(from, i, to, length)
+                return
+            }
+        }
+    }
+
+    fun frameToRam(from: Int, to: Int, devnum: Int, length: Int) {
+        (vm.peripheralTable[devnum].peripheral as? GraphicsAdapter)?.let {
+            val data = ByteArray(length)
+            it.framebuffer.pixels.position(from)
+            it.framebuffer.pixels.get(data)
+            UnsafeHelper.memcpyRaw(data, UnsafeHelper.getArrayOffset(data), null, vm.usermem.ptr + to, length.toLong())
+        }
+    }
+
+    fun frameToRam(from: Int, to: Int, length: Int) {
+        for (i in 0..7) {
+            if (vm.peripheralTable[i].type == VM.PERITYPE_GPU_AND_TERM) {
+                frameToRam(from, to, i, length)
+                return
+            }
+        }
+    }
+
+    fun comToRam(portNo: Int, srcOff: Int, destOff: Int, length: Int) {
+        SerialHelper.sendMessage(vm, portNo, READ)
+        val response = SerialHelper.getStatusCode(vm, portNo)
+        if (response == 0) {
+            val file = SerialHelper.pullMessage(vm, portNo)
+            UnsafeHelper.memcpyRaw(file, UnsafeHelper.getArrayOffset(file) + srcOff.toLong(), null, vm.usermem.ptr + destOff, length.toLong())
+        }
+    }
+
+    fun ramToCom(srcOff: Int, portNo: Int, length: Int) {
+        SerialHelper.sendMessage(vm, portNo, WRITE(length))
+        val response = SerialHelper.getStatusCode(vm, portNo)
+        if (response == 0) {
+            val msg = ByteArray(length)
+            UnsafeHelper.memcpyRaw(null, vm.usermem.ptr + srcOff, msg, UnsafeHelper.getArrayOffset(msg), length.toLong())
+            SerialHelper.sendMessage(vm, portNo, msg)
+            SerialHelper.sendMessage(vm, portNo, FLUSH)
+            SerialHelper.sendMessage(vm, portNo, CLOSE)
+        }
+    }
+
+    fun ramToRam(from: Int, to: Int, length: Int) {
+        UnsafeHelper.memcpy(vm.usermem.ptr + from, vm.usermem.ptr + to, length.toLong())
+    }
+}
\ No newline at end of file
diff --git a/src/net/torvald/tsvm/VMRunnerFactory.kt b/src/net/torvald/tsvm/VMRunnerFactory.kt
index a4af1f3..1996ef8 100644
--- a/src/net/torvald/tsvm/VMRunnerFactory.kt
+++ b/src/net/torvald/tsvm/VMRunnerFactory.kt
@@ -66,6 +66,7 @@ object VMRunnerFactory {
                         bind.putMember("gzip", CompressorDelegate)
                         bind.putMember("base64", Base64Delegate)
                         bind.putMember("com", SerialHelperDelegate(vm))
+                        bind.putMember("dma", DMADelegate(vm))
 
                         val fr = FileReader("./assets/JS_INIT.js")
                         val prg = fr.readText()