Launcher, based on PickleLauncher

[mupen64plus-pandora.git] / source / mupen64launcher / src / csystem.cpp

diff --git a/source/mupen64launcher/src/csystem.cpp b/source/mupen64launcher/src/csystem.cpp
new file mode 100644 (file)
index 0000000..73c1bea
--- /dev/null
+++ b/source/mupen64launcher/src/csystem.cpp
@@ -0,0 +1,104 @@
+/**
+ *  @section LICENSE
+ *
+ *  PickleLauncher
+ *  Copyright (C) 2010-2011 Scott Smith
+ *
+ *  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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ *  @section LOCATION
+ */
+
+#include "csystem.h"
+
+CSystem::CSystem() : CBase()
+{
+#if defined(GP2X) || defined(WIZ) || defined(CAANOO)
+    memdev = open( "/dev/mem", O_RDWR );
+    if (memdev == 0)
+    {
+        Log( "Could not open /dev/mem\n" );
+    }
+    else
+    {
+        memregs = (uint32_t*)mmap( 0, MMAP_ADDRESS, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000 );
+
+        if (memregs == MAP_FAILED)
+        {
+            Log( "Could not mmap hardware registers!\n" );
+            close(memdev);
+        }
+    }
+#endif
+}
+
+CSystem::~CSystem()
+{
+#if defined(GP2X) || defined(WIZ) || defined(CAANOO)
+    if (memdev != 0)
+    {
+        memregs = NULL;
+    }
+    close(memdev);
+#endif
+}
+
+void CSystem::SetCPUClock( uint16_t& mhz )
+{
+    // Range check
+    if (mhz == 0 || mhz > CPU_CLOCK_MAX)
+    {
+        Log( "CPU mhz out of range, resetting to default. Value is now %d and allowed values should be between 0 and %d Mhz.\n", mhz, CPU_CLOCK_MAX );
+        mhz = CPU_CLOCK_DEF;
+    }
+
+#if defined(PANDORA)
+    string command = "/usr/bin/sudo cpuset " + i_to_a(mhz);
+    execlp( command.c_str(), command.c_str(), NULL, NULL, NULL );
+
+#elif defined(WIZ) || defined(CAANOO)
+    if (memdev != 0 && memregs != 0)
+    {
+        volatile uint32_t *memregl = static_cast<volatile uint32_t*>((volatile void*)memregs);
+        uint32_t mdiv, pdiv = 9, sdiv = 0;
+        uint32_t v;
+
+        mdiv = (mhz * pdiv) / SYS_CLK_FREQ;
+        if (mdiv & ~0x3ff) return;
+        v = pdiv<<18 | mdiv<<8 | sdiv;
+
+        PLLSETREG0 = v;
+        PWRMODE |= 0x8000;
+        for (int i = 0; (PWRMODE & 0x8000) && i < 0x100000; i++);
+    }
+
+#elif defined(GP2X)
+    if (memdev != 0 && memregs != 0)
+    {
+        uint32_t v;
+        uint32_t mdiv, pdiv=3, scale=0;
+
+        mhz *= 1000000;
+        mdiv = (mhz * pdiv) / SYS_CLK_FREQ;
+        mdiv = ((mdiv-8)<<8) & 0xff00;
+        pdiv = ((pdiv-2)<<2) & 0xfc;
+        scale &= 3;
+        v = mdiv | pdiv | scale;
+        MEM_REG[0x910>>1] = v;
+    }
+
+#else
+    Log( "Setting CPU Clock not supported on this machine.\n" );
+#endif
+}