mmuhack, 6502 tweaks, fskip

[fceu.git] / drivers / gp2x / squidgehack.c

diff --git a/drivers/gp2x/squidgehack.c b/drivers/gp2x/squidgehack.c
new file mode 100644 (file)
index 0000000..f831bd4
--- /dev/null
+++ b/drivers/gp2x/squidgehack.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+extern char **g_argv;
+
+/* Call this MMU Hack kernel module after doing mmap, and before doing memset*/
+int mmuhack(void)
+{
+       char kocmd[1024];
+       int i, mmufd = open("/dev/mmuhack", O_RDWR);
+
+       if(mmufd < 0) {
+               strcpy(kocmd, "/sbin/insmod ");
+               strncpy(kocmd+13, g_argv[0], 1023-13);
+               kocmd[1023] = 0;
+               for (i = strlen(kocmd); i > 0; i--)
+                       if (kocmd[i] == '/') { kocmd[i] = 0; break; }
+               strcat(kocmd, "/mmuhack.o");
+
+               printf("Installing NK's kernel module for Squidge MMU Hack (%s)...\n", kocmd);
+               system(kocmd);
+               mmufd = open("/dev/mmuhack", O_RDWR);
+       }
+       if(mmufd < 0) return 0;
+        
+       close(mmufd);
+       return 1;
+}       
+
+
+/* Unload MMU Hack kernel module after closing all memory devices*/
+int mmuunhack(void)
+{
+       int ret;
+       printf("Removing NK's kernel module for Squidge MMU Hack... "); fflush(stdout);
+       ret = system("/sbin/rmmod mmuhack");
+       printf("done (%i)\n", ret);
+
+       return ret;
+}