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/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
jxdisp.c
Abstract:
This module implements the HAL display initialization and output routines
for a MIPS R3000 or R4000 Jazz system.
Author:
Andre Vachon (andreva) 09-May-1992
David N. Cutler (davec) 27-Apr-1991
Michael D. Kinney 30-Apr-1995
Environment:
Kernel mode
Revision History:
--*/
#include "halp.h"
#define CSI 0x9b
#define MAX_DISPLAY_BUFFER 256
int sprintf();
extern ULONG IoSpaceAlreadyMapped;
static UCHAR DisplayInitializationString[] = {CSI,'3','7',';','4','4','m',CSI,'2','J',0};
static UCHAR CarriageReturnString[] = {10,13,0};
static ULONG HalOwnsDisplay = FALSE;
static ULONG DisplayFile;
static UCHAR DisplayBuffer[MAX_DISPLAY_BUFFER];
static ULONG DisplayBufferInitialized = FALSE;
PHAL_RESET_DISPLAY_PARAMETERS HalpResetDisplayParameters;
VOID
HalAcquireDisplayOwnership (
IN PHAL_RESET_DISPLAY_PARAMETERS ResetDisplayParameters
)
/*++
Routine Description:
This routine switches ownership of the display away from the HAL to
the system display driver. It is called when the system has reached
a point during bootstrap where it is self supporting and can output
its own messages. Once ownership has passed to the system display
driver any attempts to output messages using HalDisplayString must
result in ownership of the display reverting to the HAL and the
display hardware reinitialized for use by the HAL.
Arguments:
ResetDisplayParameters - if non-NULL the address of a function
the hal can call to reset the video card. The function returns
TRUE if the display was reset.
Return Value:
None.
--*/
{
HalpAllocateArcsResources();
ArcClose(DisplayFile);
HalpFreeArcsResources();
HalOwnsDisplay = FALSE;
HalpResetDisplayParameters = ResetDisplayParameters;
return;
}
VOID
HalDisplayString (
PUCHAR String
)
/*++
Routine Description:
This routine displays a character string on the display screen.
Arguments:
String - Supplies a pointer to the characters that are to be displayed.
Return Value:
None.
--*/
{
ULONG Count;
ULONG i;
if (DisplayBufferInitialized==FALSE) {
DisplayBufferInitialized = TRUE;
strcpy(DisplayBuffer,"");
}
if (IoSpaceAlreadyMapped == FALSE) {
if ((strlen(DisplayBuffer)+strlen(String)) < MAX_DISPLAY_BUFFER) {
strcat(DisplayBuffer,String);
}
return;
}
if (HalOwnsDisplay==FALSE) {
if (HalpResetDisplayParameters != NULL) {
(HalpResetDisplayParameters)(80,25);
}
HalpResetX86DisplayAdapter();
HalpAllocateArcsResources();
ArcOpen(ArcGetEnvironmentVariable("ConsoleOut"),ArcOpenWriteOnly,&DisplayFile);
ArcWrite(DisplayFile,DisplayInitializationString,strlen(DisplayInitializationString),&Count);
if (strlen(DisplayBuffer)!=0) {
for(i=0;i<strlen(DisplayBuffer);i++) {
switch (DisplayBuffer[i]) {
case '\n' : ArcWrite(DisplayFile,CarriageReturnString,strlen(CarriageReturnString),&Count);
break;
default : ArcWrite(DisplayFile,&(DisplayBuffer[i]),1,&Count);
break;
}
}
strcpy(DisplayBuffer,"");
}
HalpFreeArcsResources();
HalOwnsDisplay=TRUE;
}
HalpAllocateArcsResources();
for(i=0;i<strlen(String);i++) {
switch (String[i]) {
case '\n' : ArcWrite(DisplayFile,CarriageReturnString,strlen(CarriageReturnString),&Count);
break;
default : ArcWrite(DisplayFile,&(String[i]),1,&Count);
break;
}
}
HalpFreeArcsResources();
return;
}
VOID
HalQueryDisplayParameters (
OUT PULONG WidthInCharacters,
OUT PULONG HeightInLines,
OUT PULONG CursorColumn,
OUT PULONG CursorRow
)
/*++
Routine Description:
This routine return information about the display area and current
cursor position.
Arguments:
WidthInCharacter - Supplies a pointer to a varible that receives
the width of the display area in characters.
HeightInLines - Supplies a pointer to a variable that receives the
height of the display area in lines.
CursorColumn - Supplies a pointer to a variable that receives the
current display column position.
CursorRow - Supplies a pointer to a variable that receives the
current display row position.
Return Value:
None.
--*/
{
ARC_DISPLAY_STATUS *DisplayStatus;
//
// Get the display parameter values and return.
//
//
// If the HAL does not already own the display, then print an empty string.
// This guarantees that the file descriptor DisplayFile is valid.
//
if (!HalOwnsDisplay) {
HalDisplayString("");
}
//
// Make firmware call to get the display's current status
//
HalpAllocateArcsResources();
DisplayStatus = ArcGetDisplayStatus(DisplayFile);
HalpFreeArcsResources();
*WidthInCharacters = DisplayStatus->CursorMaxXPosition;
*HeightInLines = DisplayStatus->CursorMaxYPosition;
*CursorColumn = DisplayStatus->CursorXPosition;
*CursorRow = DisplayStatus->CursorYPosition;
return;
}
VOID
HalSetDisplayParameters (
IN ULONG CursorColumn,
IN ULONG CursorRow
)
/*++
Routine Description:
This routine set the current cursor position on the display area.
Arguments:
CursorColumn - Supplies the new display column position.
CursorRow - Supplies a the new display row position.
Return Value:
None.
--*/
{
CHAR SetCursorPositionString[20];
ULONG Count;
//
// If the HAL does not already own the display, then print an empty string.
// This guarantees that the file descriptor DisplayFile is valid.
//
if (!HalOwnsDisplay) {
HalDisplayString("");
}
//
// Build ANSI sequence to set the cursor position.
//
sprintf(SetCursorPositionString,"%c%d;%dH",CSI,CursorRow,CursorColumn);
HalpAllocateArcsResources();
ArcWrite(DisplayFile,SetCursorPositionString,strlen(SetCursorPositionString),&Count);
HalpFreeArcsResources();
return;
}
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