From 1297540c3d3bd2aa47621c084ba462c7a0da03f4 Mon Sep 17 00:00:00 2001
From: Echelon9 <rhyskidd@gmail.com>
Date: Wed, 2 Jan 2013 21:12:24 +1100
Subject: [PATCH] Implementation (basic) of the HalReadSMBusValue kernel call
 0x002D (45)

---
 import/OpenXDK/include/xboxkrnl/hal.h | 12 ++++------
 src/CxbxKrnl/EmuKrnl.cpp              | 34 +++++++++++++++++++++++++++
 src/CxbxKrnl/KernelThunk.cpp          |  2 +-
 3 files changed, 40 insertions(+), 8 deletions(-)

diff --git a/import/OpenXDK/include/xboxkrnl/hal.h b/import/OpenXDK/include/xboxkrnl/hal.h
index f2306ccfb..612bc7f54 100644
--- a/import/OpenXDK/include/xboxkrnl/hal.h
+++ b/import/OpenXDK/include/xboxkrnl/hal.h
@@ -32,14 +32,12 @@ XBSYSAPI VOID *HalGetInterruptVector;
 // ******************************************************************
 // * HalReadSMBusValue
 // ******************************************************************
-XBSYSAPI EXPORTNUM(45) VOID NTAPI HalReadSMBusValue
+XBSYSAPI EXPORTNUM(45) NTSTATUS NTAPI HalReadSMBusValue
 (
-    ULONG   BusNumber,
-    ULONG   SlotNumber,
-    ULONG   RegisterNumber,
-    PVOID   Buffer,
-    ULONG   Length,
-    BOOLEAN WritePCISpace
+    IN UCHAR   Address,
+    IN UCHAR   Command,
+    IN BOOLEAN WriteWord,
+    OUT PULONG DataValue
 );
 
 // ******************************************************************
diff --git a/src/CxbxKrnl/EmuKrnl.cpp b/src/CxbxKrnl/EmuKrnl.cpp
index 192f99b9f..fba671622 100644
--- a/src/CxbxKrnl/EmuKrnl.cpp
+++ b/src/CxbxKrnl/EmuKrnl.cpp
@@ -1553,6 +1553,40 @@ XBSYSAPI EXPORTNUM(37) xboxkrnl::LONG NTAPI xboxkrnl::FscSetCacheSize(ULONG uCac
     return 0;
 }
 
+// ******************************************************************
+// * 0x002D - HalReadSMBusValue
+// ******************************************************************
+XBSYSAPI EXPORTNUM(45) xboxkrnl::NTSTATUS NTAPI xboxkrnl::HalReadSMBusValue
+(
+    IN  UCHAR               Address,
+    IN  UCHAR               Command,
+    IN  BOOLEAN             ReadWord,
+    OUT PULONG              DataValue
+)
+{
+	EmuSwapFS();   // Win2k/XP FS
+
+    DbgPrintf("EmuKrnl (0x%X): HalReadSMBusValue\n"
+           "(\n"
+           "   Address             : 0x%.08X\n"
+           "   Command             : 0x%.08X\n"
+           "   ReadWord            : 0x%.08X\n"
+           "   DataValue           : 0x%.08X\n"
+           ");\n",
+           GetCurrentThreadId(), Address, Command, ReadWord, DataValue);
+
+    if (ReadWord) {
+        // Write UCHAR
+    } else {
+        // Write BYTE
+    }
+
+	EmuSwapFS();	// Xbox FS
+
+	return STATUS_SUCCESS;
+}
+
+
 // ******************************************************************
 // * 0x0031 - HalReturnToFirmware
 // ******************************************************************
diff --git a/src/CxbxKrnl/KernelThunk.cpp b/src/CxbxKrnl/KernelThunk.cpp
index 40f92efc6..f8d647973 100644
--- a/src/CxbxKrnl/KernelThunk.cpp
+++ b/src/CxbxKrnl/KernelThunk.cpp
@@ -102,7 +102,7 @@ extern "C" CXBXKRNL_API uint32 CxbxKrnl_KernelThunkTable[367] =
     (uint32)PANIC(0x002A),                          // 0x002A (42)
     (uint32)PANIC(0x002B),                          // 0x002B (43)
     (uint32)PANIC(0x002C),                          // 0x002C (44)
-    (uint32)PANIC(0x002D),                          // 0x002D (45)
+    (uint32)&xboxkrnl::HalReadSMBusValue,           // 0x002D (45)
     (uint32)PANIC(0x002E),                          // 0x002E (46)
     (uint32)PANIC(0x002F),                          // 0x002F (47)
     (uint32)PANIC(0x0030),                          // 0x0030 (48)