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/*
* Copyright (c) 2006-2008 Advanced Micro Devices,Inc. ("AMD").
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*/
// Function:
// This module contains the main code to handle the VSA II interface.
#include "vsa2.h"
#include "vr.h"
#include "lxvg.h"
// This is required here because of inclusion problems in LXVG.h
extern Hardware SystemInfo;
// ARRAY TO STORE VSA II MESSAGE PARAMETERS
unsigned long VSAparam[MAX_MSG_PARAM];
//---------------------------------------------------------------------------
// vsa2_message_loop
//
// This is the main routine that handles the VSA II message interface.
//---------------------------------------------------------------------------
void vsa2_message_loop(void)
{
MSG Msg;
// SPIN FOREVER ON MESSAGE LOOP
// The VSA system manager branches here after loading the VSM. Control
// is returned to the system manager using an SMI.
do {
// GET THE NEXT MESSAGE
// If a message is available, the macro reads the parameter data
// from the VSM header and copies it to the VSAparam global array.
// If a message is not available, control returns to the main VSA
// dispatcher.
Msg = SYS_GET_NEXT_MSG(&VSAparam);
// DECODE THE MESSAGE
switch(Msg)
{
case MSG_INITIALIZE:
// CHECK IF NORMAL INITIALIZATION
// Currently there is no "end of post" initialization.
if (VSAparam[0] == EARLY_INIT) {
// Get information about the system I'm executing on.
SYS_GET_SYSTEM_INFO(&SystemInfo);
// REGISTER FOR VGA VIRTUAL REGISTER EVENTS
SYS_REGISTER_EVENT(EVENT_VIRTUAL_REGISTER, VRC_VG, 0, NORMAL_PRIORITY);
}
else
{
// Now we can handle DPMS and driver active
VGState |= SF_END_POST;
}
break;
case MSG_EVENT:
// DECODE THE EVENT
decode_vsa2_event();
break;
case MSG_WARM_BOOT:
break;
default:
break;
}
} while(1);
}
//---------------------------------------------------------------------------
// decode_vsa2_event
//
// This routine is called when the message loop receives an event. For
// LXVG, this is either a Virtual Rgister event or a pci event
// (trapping PCI config cycles to our device).
//---------------------------------------------------------------------------
void decode_vsa2_event(void)
{
// PARSE EVENT
switch((unsigned short)VSAparam[0])
{
case EVENT_VIRTUAL_REGISTER:
if (VRC_VG == (unsigned char)(VSAparam[1] >> 8))
virtual_register_event((unsigned char)VSAparam[1], VSAparam[2], VSAparam[3]);
break;
case EVENT_PCI_TRAP:
// If LXVG isn't enabled, just leave
if (VGState & SF_DISABLED) break;
// CALL LXVG TO DECODE THE PCI TRAP EVENT
// address = VSAparam[1]
// size = VSAparam[2], bit 7 indicates write.
// data = VSAparam[3]
pci_trap_event(VSAparam[1], VSAparam[2], VSAparam[3]);
break;
default:
break;
}
}
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