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psp_main.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program 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 General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-1-0-0rc1/backends/platform/psp/psp_main.cpp $
 * $Id: psp_main.cpp 43526 2009-08-19 01:41:23Z joostp $
 *
 */


#define     USERSPACE_ONLY    //don't use kernel mode features

#ifndef USERSPACE_ONLY
#include <pspkernel.h>
#include <pspdebug.h>
#endif

#include <psppower.h>

#include <common/system.h>
#include <engines/engine.h>
#include <base/main.h>
#include <base/plugins.h>
#include "backends/platform/psp/powerman.h"


#include "osys_psp_gu.h"
#include "./trace.h"



/**
 * Define the module info section
 *
 * 2nd arg must 0x1000 so __init is executed in
 * kernelmode for our loaderInit function
 */
#ifndef USERSPACE_ONLY
PSP_MODULE_INFO("SCUMMVM-PSP", 0x1000, 1, 1);
#else
PSP_MODULE_INFO("SCUMMVM-PSP", 0, 1, 1);
#endif

/**
 * THREAD_ATTR_USER causes the thread that the startup
 * code (crt0.c) starts this program in to be in usermode
 * even though the module was started in kernelmode
 */
PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER | THREAD_ATTR_VFPU);
PSP_HEAP_SIZE_KB(-128); //Leave 128kb for thread stacks, etc.


#ifndef USERSPACE_ONLY
void MyExceptionHandler(PspDebugRegBlock *regs) {
      /* Do normal initial dump, setup screen etc */

      pspDebugScreenInit();

      pspDebugScreenSetBackColor(0x00FF0000);
      pspDebugScreenSetTextColor(0xFFFFFFFF);
      pspDebugScreenClear();

      pspDebugScreenPrintf("Exception Details:\n");
      pspDebugDumpException(regs);

      while (1) ;
}

/**
 * Function that is called from _init in kernelmode before the
 * main thread is started in usermode.
 */
__attribute__ ((constructor))
void loaderInit() {
      pspKernelSetKernelPC();
      pspDebugInstallErrorHandler(MyExceptionHandler);
}
#endif

/* Exit callback */
int exit_callback(void) {
      sceKernelExitGame();
      return 0;
}

/* Function for handling suspend/resume */
void power_callback(int , int powerinfo) {
      if (powerinfo & PSP_POWER_CB_POWER_SWITCH || powerinfo & PSP_POWER_CB_SUSPENDING) {
            PowerMan.suspend();
      } else if (powerinfo & PSP_POWER_CB_RESUME_COMPLETE) {
            PowerMan.resume();
      }
}

/* Callback thread */
int CallbackThread(SceSize /*size*/, void *arg) {
      int cbid;

      cbid = sceKernelCreateCallback("Exit Callback", (SceKernelCallbackFunction)exit_callback, NULL);
      sceKernelRegisterExitCallback(cbid);
      /* Set up callbacks for PSPIoStream */

      cbid = sceKernelCreateCallback("Power Callback", (SceKernelCallbackFunction)power_callback, 0);
      if (cbid >= 0) {
            if(scePowerRegisterCallback(-1, cbid) < 0) {
                  PSPDebugTrace("SetupCallbacks(): Couldn't register callback for power_callback\n");
            }
      } else {
            PSPDebugTrace("SetupCallbacks(): Couldn't create a callback for power_callback\n");
      }

      sceKernelSleepThreadCB();
      return 0;
}

/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void) {
      int thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, THREAD_ATTR_USER, 0);
      if (thid >= 0) {
            sceKernelStartThread(thid, 0, 0);
      }

      return thid;
}

#undef main
int main(void) {
      //change clock rate to 333mhz
      scePowerSetClockFrequency(333, 333, 166);

      PowerManager::instance();     // Setup power manager

      SetupCallbacks();

      static const char *argv[] = { "scummvm", NULL };
      static int argc = sizeof(argv)/sizeof(char *)-1;

      g_system = new OSystem_PSP_GU();
      assert(g_system);

      int res = scummvm_main(argc, argv);

      g_system->quit(); // TODO: Consider removing / replacing this!

      PowerManager::destroy();      // get rid of PowerManager

      sceKernelSleepThread();

      return res;
}


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