[reactos] 01/02: [BOOTVID] Simplify the code by introducing and using IO port helper macros.

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=025cfb108bdadda465237…

commit 025cfb108bdadda46523750d9859aadd5bce353d
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Sun Jun 23 02:29:01 2019 +0200
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Sun Jun 23 02:59:43 2019 +0200

    [BOOTVID] Simplify the code by introducing and using IO port helper macros.
    
    - Move around two header includes.
    - Remove a redundant assignment in VgaInterpretCmdStream().
---
 drivers/base/bootvid/i386/bootvid.c | 101 +++++++++++++++++-------------------
 drivers/base/bootvid/i386/vga.c     |  12 ++---
 drivers/base/bootvid/precomp.h      |  18 ++++++-
 3 files changed, 67 insertions(+), 64 deletions(-)

diff --git a/drivers/base/bootvid/i386/bootvid.c b/drivers/base/bootvid/i386/bootvid.c
index 333e5de4faa..2909b6c4a93 100644
--- a/drivers/base/bootvid/i386/bootvid.c
+++ b/drivers/base/bootvid/i386/bootvid.c
@@ -1,8 +1,5 @@
 #include "precomp.h"
 
-#include <ntifs.h>
-#include <ndk/halfuncs.h>
-
 /* PRIVATE FUNCTIONS *********************************************************/
 
 static BOOLEAN
@@ -227,9 +224,6 @@ VgaInterpretCmdStream(IN PUSHORT CmdStream)
             /* Unknown major function, fail */
             return FALSE;
         }
-
-        /* Get the next command */
-        Cmd = *CmdStream;
     }
 
     /* If we got here, return success */
@@ -245,114 +239,115 @@ VgaIsPresent(VOID)
     UCHAR i;
 
     /* Read the VGA Address Register */
-    VgaReg = READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE);
+    VgaReg = __inpb(0x3CE);
 
     /* Select Read Map Select Register */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 4);
+    __outpb(0x3CE, 4);
 
-    /* Read it back...it should be 4 */
-    if (((READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE)) & 0xF) != 4) return
FALSE;
+    /* Read it back... it should be 4 */
+    if ((__inpb(0x3CE) & 0xF) != 4)
+        return FALSE;
 
     /* Read the VGA Data Register */
-    VgaReg2 = READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF);
+    VgaReg2 = __inpb(0x3CF);
 
     /* Enable all planes */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 3);
+    __outpb(0x3CF, 3);
 
-    /* Read it back...it should be 3 */
-    if (READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF) != 0x3)
+    /* Read it back... it should be 3 */
+    if (__inpb(0x3CF) != 0x3)
     {
         /* Reset the registers and fail */
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 0);
+        __outpb(0x3CF, 0);
         return FALSE;
     }
 
     /* Select Bit Mask Register */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 8);
+    __outpb(0x3CE, 8);
 
-    /* Read it back...it should be 8 */
-    if (((READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE)) & 0xF) != 8)
+    /* Read it back... it should be 8 */
+    if ((__inpb(0x3CE) & 0xF) != 8)
     {
         /* Reset the registers and fail */
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 4);
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 0);
+        __outpb(0x3CE, 4);
+        __outpb(0x3CF, 0);
         return FALSE;
     }
 
     /* Read the VGA Data Register */
-    VgaReg3 = READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF);
+    VgaReg3 = __inpb(0x3CF);
 
     /* Loop bitmasks */
     for (i = 0xBB; i; i >>= 1)
     {
         /*  Set bitmask */
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, i);
+        __outpb(0x3CF, i);
 
-        /* Read it back...it should be the same */
-        if (READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF) != i)
+        /* Read it back... it should be the same */
+        if (__inpb(0x3CF) != i)
         {
             /* Reset the registers and fail */
-            WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 0xFF);
-            WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 4);
-            WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 0);
+            __outpb(0x3CF, 0xFF);
+            __outpb(0x3CE, 4);
+            __outpb(0x3CF, 0);
             return FALSE;
         }
     }
 
     /* Select Read Map Select Register */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 4);
+    __outpb(0x3CE, 4);
 
-    /* Read it back...it should be 3 */
-    if (READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF) != 3)
+    /* Read it back... it should be 3 */
+    if (__inpb(0x3CF) != 3)
     {
         /* Reset the registers and fail */
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 0);
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 8);
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 0xFF);
+        __outpb(0x3CF, 0);
+        __outpb(0x3CE, 8);
+        __outpb(0x3CF, 0xFF);
         return FALSE;
     }
 
     /* Write the registers we read earlier */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, VgaReg2);
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 8);
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, VgaReg3);
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, VgaReg);
+    __outpb(0x3CF, VgaReg2);
+    __outpb(0x3CE, 8);
+    __outpb(0x3CF, VgaReg3);
+    __outpb(0x3CE, VgaReg);
 
     /* Read sequencer address */
-    SeqReg = READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C4);
+    SeqReg = __inpb(0x3C4);
 
     /* Select memory mode register */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C4, 4);
+    __outpb(0x3C4, 4);
 
-    /* Read it back...it should still be 4 */
-    if (((READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C4)) & 7) != 4)
+    /* Read it back... it should still be 4 */
+    if ((__inpb(0x3C4) & 7) != 4)
     {
-        /*  Fail */
+        /* Fail */
         return FALSE;
     }
 
     /* Read sequencer Data */
-    SeqReg2 = READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C5);
+    SeqReg2 = __inpb(0x3C5);
 
     /* Write null plane */
-    WRITE_PORT_USHORT((PUSHORT)VgaRegisterBase + 0x3C4, 0x100);
+    __outpw(0x3C4, 0x100);
 
     /* Write sequencer flag */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C5, SeqReg2 ^ 8);
+    __outpb(0x3C5, SeqReg2 ^ 8);
 
     /* Read it back */
-    if ((READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C5)) != (SeqReg2 ^ 8))
+    if (__inpb(0x3C5) != (SeqReg2 ^ 8))
     {
-        /* Not the same value...restore registers and fail */
-        WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C5, 2);
-        WRITE_PORT_USHORT((PUSHORT)VgaRegisterBase + 0x3C4, 0x300);
+        /* Not the same value... restore registers and fail */
+        __outpb(0x3C5, 2);
+        __outpw(0x3C4, 0x300);
         return FALSE;
     }
 
     /* Now write the registers we read */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C5, SeqReg2);
-    WRITE_PORT_USHORT((PUSHORT)VgaRegisterBase + 0x3C4, 0x300);
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3C4, SeqReg);
+    __outpb(0x3C5, SeqReg2);
+    __outpw(0x3C4, 0x300);
+    __outpb(0x3C4, SeqReg);
 
     /* VGA is present! */
     return TRUE;
@@ -458,7 +453,7 @@ VidInitialize(IN BOOLEAN SetMode)
         /* Initialize it */
         VgaInterpretCmdStream(AT_Initialization);
     }
-    
+
     /* VGA is ready */
     return TRUE;
 }
diff --git a/drivers/base/bootvid/i386/vga.c b/drivers/base/bootvid/i386/vga.c
index dcb02837512..cc2032deaaf 100644
--- a/drivers/base/bootvid/i386/vga.c
+++ b/drivers/base/bootvid/i386/vga.c
@@ -70,12 +70,6 @@ ULONG curr_y = 0;
 static ULONG VidTextColor = 0xF;
 static BOOLEAN CarriageReturn = FALSE;
 
-#define __outpb(Port, Value) \
-    WRITE_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)), (UCHAR)(Value))
-
-#define __outpw(Port, Value) \
-    WRITE_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)), (USHORT)(Value))
-
 /* PRIVATE FUNCTIONS *********************************************************/
 
 static VOID
@@ -88,7 +82,7 @@ ReadWriteMode(IN UCHAR Mode)
     __outpb(0x3CE, 5);
 
     /* Get the current register value, minus the current mode */
-    Value = READ_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF) & 0xF4;
+    Value = __inpb(0x3CF) & 0xF4;
 
     /* Set the new mode */
     __outpb(0x3CF, Mode | Value);
@@ -750,10 +744,10 @@ NTAPI
 VidCleanUp(VOID)
 {
     /* Select bit mask register */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CE, 8);
+    __outpb(0x3CE, 8);
 
     /* Clear it */
-    WRITE_PORT_UCHAR((PUCHAR)VgaRegisterBase + 0x3CF, 255);
+    __outpb(0x3CF, 255);
 }
 
 /*
diff --git a/drivers/base/bootvid/precomp.h b/drivers/base/bootvid/precomp.h
index 33fb58c7483..087a6bbf575 100644
--- a/drivers/base/bootvid/precomp.h
+++ b/drivers/base/bootvid/precomp.h
@@ -2,12 +2,14 @@
 #define _BOOTVID_PCH_
 
 #include <ntddk.h>
+#include <ntifs.h>
+#include <ndk/halfuncs.h>
 #include <drivers/bootvid/bootvid.h>
 
 /* Define if FontData has upside down characters */
 #undef CHAR_GEN_UPSIDE_DOWN
 
-#define BOOTCHAR_HEIGHT             13
+#define BOOTCHAR_HEIGHT     13
 
 /* Command Stream Definitions */
 #define CMD_STREAM_WRITE            0x0
@@ -40,11 +42,23 @@ NTAPI
 InitializePalette(VOID);
 
 /* Globals */
-extern USHORT AT_Initialization[];
 extern ULONG curr_x;
 extern ULONG curr_y;
 extern ULONG_PTR VgaRegisterBase;
 extern ULONG_PTR VgaBase;
+extern USHORT AT_Initialization[];
 extern UCHAR FontData[256 * BOOTCHAR_HEIGHT];
 
+#define __inpb(Port) \
+    READ_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)))
+
+#define __inpw(Port) \
+    READ_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)))
+
+#define __outpb(Port, Value) \
+    WRITE_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)), (UCHAR)(Value))
+
+#define __outpw(Port, Value) \
+    WRITE_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)), (USHORT)(Value))
+
 #endif /* _BOOTVID_PCH_ */