From 6dd94572e5eb4bdfe529c807e341b3c149af5e08 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herv=C3=A9=20Poussineau?= <hpoussin@reactos.org>
Date: Thu, 7 Oct 2021 21:39:06 +0200
Subject: [PATCH] [VBEMP] Correctly report legacy resources (VGA I/O ports and
 memory)

CORE-17789
---
 win32ss/drivers/miniport/vbe/vbemp.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/win32ss/drivers/miniport/vbe/vbemp.c b/win32ss/drivers/miniport/vbe/vbemp.c
index 68692647f6e..c577902366d 100644
--- a/win32ss/drivers/miniport/vbe/vbemp.c
+++ b/win32ss/drivers/miniport/vbe/vbemp.c
@@ -36,6 +36,13 @@
 #define LOWORD(l)	((USHORT)((ULONG_PTR)(l)))
 #define HIWORD(l)	((USHORT)(((ULONG_PTR)(l)>>16)&0xFFFF))
 
+VIDEO_ACCESS_RANGE VBEAccessRange[] =
+{
+    { {{0x3b0}}, 0x3bb - 0x3b0 + 1, 1, 1, 0 },
+    { {{0x3c0}}, 0x3df - 0x3c0 + 1, 1, 1, 0 },
+    { {{0xa0000}}, 0x20000, 0, 1, 0 },
+};
+
 /* PUBLIC AND PRIVATE FUNCTIONS ***********************************************/
 
 ULONG NTAPI
@@ -53,6 +60,8 @@ DriverEntry(IN PVOID Context1, IN PVOID Context2)
    InitData.HwSetPowerState = VBESetPowerState;
    InitData.HwGetVideoChildDescriptor = VBEGetVideoChildDescriptor;
    InitData.HwDeviceExtensionSize = sizeof(VBE_DEVICE_EXTENSION);
+   InitData.HwLegacyResourceList = VBEAccessRange;
+   InitData.HwLegacyResourceCount = ARRAYSIZE(VBEAccessRange);
 
    return VideoPortInitialize(Context1, Context2, &InitData, NULL);
 }
@@ -76,8 +85,11 @@ VBEFindAdapter(
    if (VideoPortIsNoVesa())
        return ERROR_DEV_NOT_EXIST;
 
-   ConfigInfo->VdmPhysicalVideoMemoryAddress.QuadPart = 0xa000;
-   ConfigInfo->VdmPhysicalVideoMemoryLength = 0x2000;
+   if (ConfigInfo->Length < sizeof(VIDEO_PORT_CONFIG_INFO))
+       return ERROR_INVALID_PARAMETER;
+
+   ConfigInfo->VdmPhysicalVideoMemoryAddress = VBEAccessRange[2].RangeStart;
+   ConfigInfo->VdmPhysicalVideoMemoryLength = VBEAccessRange[2].RangeLength;
    return NO_ERROR;
 }