From dc376aa22200db4504ca2ef1c4f3c1e4e0689684 Mon Sep 17 00:00:00 2001
From: plutoo <plutoo@universe>
Date: Sat, 9 Sep 2017 06:38:56 +0200
Subject: [PATCH] More ipc

---
 nx/include/switch/ipc.h | 57 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 56 insertions(+), 1 deletion(-)

diff --git a/nx/include/switch/ipc.h b/nx/include/switch/ipc.h
index b661b6da..5fbafd3d 100644
--- a/nx/include/switch/ipc.h
+++ b/nx/include/switch/ipc.h
@@ -1,3 +1,5 @@
+#define SFCI_MAGIC 0x49434653
+
 typedef struct {
     size_t NumSend; // A
     size_t NumRecv; // B
@@ -8,7 +10,8 @@ typedef struct {
     u8     Flags[8];
 
     bool   SendPid;
-    size_t NumHandles;
+    size_t NumHandlesCopy;
+    size_t NumHandlesMove;
     Handle Handles[8];
 } IpcCommand;
 
@@ -22,6 +25,17 @@ static inline void ipcInitialize(IpcCommand* cmd) {
     cmd->NumHandles = 0;
 }
 
+typedef struct { // todo: Make sure sizeof isn't 16 bytes!
+    u32 Size;
+    u32 Addr;
+    u32 Packed;
+} IpcBufferDescriptor;
+
+typedef struct {
+    u32 Packed;
+    u32 Addr;
+} IpcStaticSendDescriptor;
+
 static inline void ipcAddSendBuffer(IpcCommand* cmd, void* buffer, size_t size, u8 Flags) {
     size_t off = cmd->NumSend;
     cmd->Buffers[off] = buffer;
@@ -41,3 +55,44 @@ static inline void ipcAddRecvBuffer(IpcCommand* cmd, void* buffer, size_t size,
 static inline void ipcSendPid(IpcCommand* cmd) {
     cmd->SendPid = true;
 }
+
+static inline void ipcSendHandleCopy(IpcCommand* cmd, Handle h) {
+    cmd->Handles[cmd->NumHandlesCopy++] = h;
+}
+
+static inline void ipcSendHandleMove(IpcCommand* cmd, Handle h) {
+    cmd->Handles[cmd->NumHandlesCopy + cmd->NumHandlesMove++] = h;
+}
+
+static inline void* ipcPrepareHeader(IpcCommand* cmd, size_t sizeof_raw) {
+    u32* buf = armGetTlsPtr();
+    *buf++ = 4 | (cmd->NumSend << 20) | (cmd->NumRecv << 24);
+
+    u32 flag = 0;
+    if (cmd->SendPid || cmd->NumHandlesCopy > 0 || cmd->NumHandlesMove > 0) {
+        *buf++ = (sizeof_raw/4) | 0x80000000;
+        *buf++ = (!!cmd->SendPid) | (cmd->NumHandlesCopy << 1) | (cmd->NumHandlesMove << 1);
+    }
+    else {
+        *buf++ = sizeof_raw/4;
+    }
+
+    size_t i;
+    for (i=0; i<(cmd->NumSend + cmd->NumRecv); i++, buf+=3) {
+        IpcBufferDescriptor* desc = (IpcBufferDescriptor*) buf;
+        desc->Size = cmd->Sizes[i];
+        desc->Addr = cmd->Buffers[i];
+        uintptr_t ptr = (uintptr_t) cmd->Buffers[i]
+        desc->Packed =
+            (((ptr) >> 36) << 28) |
+            (((ptr >> 32) & 15) << 28) |
+            cmd->Flags[i];
+    }
+
+    // todo: More
+    return (void*) ((uintptr_t)buf + 15) &~ 15;
+}
+
+static inline Result ipcDispatch(Handle session) {
+    return svcSendSyncRequest(session);
+}