diff options
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/smx/event.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/smx/event.c | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/smx/event.c b/board/MAI/bios_emulator/scitech/src/pm/smx/event.c new file mode 100644 index 0000000000..fc13bbbe42 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/smx/event.c @@ -0,0 +1,368 @@ +/**************************************************************************** +* +* SciTech OS Portability Manager Library +* +* ======================================================================== +* +* The contents of this file are subject to the SciTech MGL Public +* License Version 1.0 (the "License"); you may not use this file +* except in compliance with the License. You may obtain a copy of +* the License at http://www.scitechsoft.com/mgl-license.txt +* +* Software distributed under the License is distributed on an +* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or +* implied. See the License for the specific language governing +* rights and limitations under the License. +* +* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. +* +* The Initial Developer of the Original Code is SciTech Software, Inc. +* All Rights Reserved. +* +* ======================================================================== +* +* Language: ANSI C +* Environment: 32-bit SMX embedded systems development +* +* Description: 32-bit SMX implementation for the SciTech cross platform +* event library. +* +****************************************************************************/ + +#include "smx/ps2mouse.h" + +/*--------------------------- Global variables ----------------------------*/ + +ibool _VARAPI _EVT_useEvents = true; /* True to use event handling */ +ibool _VARAPI _EVT_installed = 0; /* Event handers installed? */ +uchar _VARAPI *_EVT_biosPtr = NULL; /* Pointer to the BIOS data area */ +static ibool haveMouse = false; /* True if we have a mouse */ + +/*---------------------------- Implementation -----------------------------*/ + +/* External assembler functions */ + +void EVTAPI _EVT_pollJoystick(void); +uint EVTAPI _EVT_disableInt(void); +uint EVTAPI _EVT_restoreInt(uint flags); +void EVTAPI _EVT_codeStart(void); +void EVTAPI _EVT_codeEnd(void); +void EVTAPI _EVT_cCodeStart(void); +void EVTAPI _EVT_cCodeEnd(void); +int EVTAPI _EVT_getKeyCode(void); +int EVTAPI EVT_rdinx(int port,int index); +void EVTAPI EVT_wrinx(int port,int index,int value); + +/**************************************************************************** +REMARKS: +Do nothing for DOS, because we are fully interrupt driven. +****************************************************************************/ +#define _EVT_pumpMessages() + +/**************************************************************************** +REMARKS: +This function is used to return the number of ticks since system +startup in milliseconds. This should be the same value that is placed into +the time stamp fields of events, and is used to implement auto mouse down +events. +****************************************************************************/ +ulong _EVT_getTicks(void) +{ + return (ulong)PM_getLong(_EVT_biosPtr+0x6C) * 55UL; +} + +/**************************************************************************** +REMARKS: +Include generic raw scancode keyboard module. +****************************************************************************/ +#include "common/keyboard.c" + +/**************************************************************************** +REMARKS: +Determines if we have a mouse attached and functioning. +****************************************************************************/ +static ibool detectMouse(void) +{ + return(ps2Query()); +} + +/**************************************************************************** +PARAMETERS: +what - Event code +message - Event message +x,y - Mouse position at time of event +but_stat - Mouse button status at time of event + +REMARKS: +Adds a new mouse event to the event queue. This routine is called from within +the mouse interrupt subroutine, so it must be efficient. + +NOTE: Interrupts MUST be OFF while this routine is called to ensure we have + mutually exclusive access to our internal data structures for + interrupt driven systems (like under DOS). +****************************************************************************/ +static void addMouseEvent( + uint what, + uint message, + int x, + int y, + int mickeyX, + int mickeyY, + uint but_stat) +{ + event_t evt; + + if (EVT.count < EVENTQSIZE) { + /* Save information in event record. */ + evt.when = _EVT_getTicks(); + evt.what = what; + evt.message = message; + evt.modifiers = but_stat; + evt.where_x = x; /* Save mouse event position */ + evt.where_y = y; + evt.relative_x = mickeyX; + evt.relative_y = mickeyY; + evt.modifiers |= EVT.keyModifiers; + addEvent(&evt); /* Add to tail of event queue */ + } +} + +/**************************************************************************** +PARAMETERS: +mask - Event mask +butstate - Button state +x - Mouse x coordinate +y - Mouse y coordinate + +REMARKS: +Mouse event handling routine. This gets called when a mouse event occurs, +and we call the addMouseEvent() routine to add the appropriate mouse event +to the event queue. + +Note: Interrupts are ON when this routine is called by the mouse driver code. +//AM: NOTE: This function has not actually been ported from DOS yet and should not +//AM: be installed until it is. +****************************************************************************/ +static void EVTAPI mouseISR( + uint mask, + uint butstate, + int x, + int y, + int mickeyX, + int mickeyY) +{ + RMREGS regs; + uint ps; + + if (mask & 1) { + /* Save the current mouse coordinates */ + EVT.mx = x; EVT.my = y; + + /* If the last event was a movement event, then modify the last + * event rather than post a new one, so that the queue will not + * become saturated. Before we modify the data structures, we + * MUST ensure that interrupts are off. + */ + ps = _EVT_disableInt(); + if (EVT.oldMove != -1) { + EVT.evtq[EVT.oldMove].where_x = x; /* Modify existing one */ + EVT.evtq[EVT.oldMove].where_y = y; + EVT.evtq[EVT.oldMove].relative_x += mickeyX; + EVT.evtq[EVT.oldMove].relative_y += mickeyY; + } + else { + EVT.oldMove = EVT.freeHead; /* Save id of this move event */ + addMouseEvent(EVT_MOUSEMOVE,0,x,y,mickeyX,mickeyY,butstate); + } + _EVT_restoreInt(ps); + } + if (mask & 0x2A) { + ps = _EVT_disableInt(); + addMouseEvent(EVT_MOUSEDOWN,mask >> 1,x,y,0,0,butstate); + EVT.oldMove = -1; + _EVT_restoreInt(ps); + } + if (mask & 0x54) { + ps = _EVT_disableInt(); + addMouseEvent(EVT_MOUSEUP,mask >> 2,x,y,0,0,butstate); + EVT.oldMove = -1; + _EVT_restoreInt(ps); + } + EVT.oldKey = -1; +} + +/**************************************************************************** +REMARKS: +Keyboard interrupt handler function. + +NOTE: Interrupts are OFF when this routine is called by the keyboard ISR, + and we leave them OFF the entire time. This has been modified to work + in conjunction with smx keyboard handler. +****************************************************************************/ +static void EVTAPI keyboardISR(void) +{ + PM_chainPrevKey(); + processRawScanCode(PM_inpb(0x60)); + PM_outpb(0x20,0x20); +} + +/**************************************************************************** +REMARKS: +Safely abort the event module upon catching a fatal error. +****************************************************************************/ +void _EVT_abort() +{ + EVT_exit(); + PM_fatalError("Unhandled exception!"); +} + +/**************************************************************************** +PARAMETERS: +mouseMove - Callback function to call wheneve the mouse needs to be moved + +REMARKS: +Initiliase the event handling module. Here we install our mouse handling ISR +to be called whenever any button's are pressed or released. We also build +the free list of events in the event queue. + +We use handler number 2 of the mouse libraries interrupt handlers for our +event handling routines. +****************************************************************************/ +void EVTAPI EVT_init( + _EVT_mouseMoveHandler mouseMove) +{ + int i; + + EVT.mouseMove = mouseMove; + _EVT_biosPtr = PM_getBIOSPointer(); + EVT_resume(); +} + +/**************************************************************************** +REMARKS: +Initiailises the internal event handling modules. The EVT_suspend function +can be called to suspend event handling (such as when shelling out to DOS), +and this function can be used to resume it again later. +****************************************************************************/ +void EVTAPI EVT_resume(void) +{ + static int locked = 0; + int stat; + uchar mods; + PM_lockHandle lh; + + if (_EVT_useEvents) { + /* Initialise the event queue and enable our interrupt handlers */ + initEventQueue(); + PM_setKeyHandler(keyboardISR); + if ((haveMouse = detectMouse()) != 0) + PM_setMouseHandler(0xFFFF,mouseISR); + + /* Read the keyboard modifier flags from the BIOS to get the + * correct initialisation state. The only state we care about is + * the correct toggle state flags such as SCROLLLOCK, NUMLOCK and + * CAPSLOCK. + */ + EVT.keyModifiers = 0; + mods = PM_getByte(_EVT_biosPtr+0x17); + if (mods & 0x10) + EVT.keyModifiers |= EVT_SCROLLLOCK; + if (mods & 0x20) + EVT.keyModifiers |= EVT_NUMLOCK; + if (mods & 0x40) + EVT.keyModifiers |= EVT_CAPSLOCK; + + /* Lock all of the code and data used by our protected mode interrupt + * handling routines, so that it will continue to work correctly + * under real mode. + */ + if (!locked) { + /* It is difficult to ensure that we lock our global data, so we + * do this by taking the address of a variable locking all data + * 2Kb on either side. This should properly cover the global data + * used by the module (the other alternative is to declare the + * variables in assembler, in which case we know it will be + * correct). + */ + stat = !PM_lockDataPages(&EVT,sizeof(EVT),&lh); + stat |= !PM_lockDataPages(&_EVT_biosPtr,sizeof(_EVT_biosPtr),&lh); + stat |= !PM_lockCodePages((__codePtr)_EVT_cCodeStart,(int)_EVT_cCodeEnd-(int)_EVT_cCodeStart,&lh); + stat |= !PM_lockCodePages((__codePtr)_EVT_codeStart,(int)_EVT_codeEnd-(int)_EVT_codeStart,&lh); + if (stat) { + PM_fatalError("Page locking services failed - interrupt handling not safe!"); + exit(1); + } + locked = 1; + } + + _EVT_installed = true; + } +} + +/**************************************************************************** +REMARKS +Changes the range of coordinates returned by the mouse functions to the +specified range of values. This is used when changing between graphics +modes set the range of mouse coordinates for the new display mode. +****************************************************************************/ +void EVTAPI EVT_setMouseRange( + int xRes, + int yRes) +{ + if (haveMouse) { + ps2MouseStop(); + ps2MouseStart( 0, xRes, 0, yRes, -1, -1, -1); + } +} + +/**************************************************************************** +REMARKS +Modifes the mouse coordinates as necessary if scaling to OS coordinates, +and sets the OS mouse cursor position. +****************************************************************************/ +void _EVT_setMousePos( + int *x, + int *y) +{ + if (haveMouse) + ps2MouseMove(*x, *y); +} + +/**************************************************************************** +REMARKS +Suspends all of our event handling operations. This is also used to +de-install the event handling code. +****************************************************************************/ +void EVTAPI EVT_suspend(void) +{ + uchar mods; + + if (_EVT_installed) { + PM_restoreKeyHandler(); + if (haveMouse) + PM_restoreMouseHandler(); + + /* Set the keyboard modifier flags in the BIOS to our values */ + EVT_allowLEDS(true); + mods = PM_getByte(_EVT_biosPtr+0x17) & ~0x70; + if (EVT.keyModifiers & EVT_SCROLLLOCK) + mods |= 0x10; + if (EVT.keyModifiers & EVT_NUMLOCK) + mods |= 0x20; + if (EVT.keyModifiers & EVT_CAPSLOCK) + mods |= 0x40; + PM_setByte(_EVT_biosPtr+0x17,mods); + + /* Flag that we are no longer installed */ + _EVT_installed = false; + } +} + +/**************************************************************************** +REMARKS +Exits the event module for program terminatation. +****************************************************************************/ +void EVTAPI EVT_exit(void) +{ + EVT_suspend(); +} |