From: notaz <notasas@gmail.com>
Date: Thu, 5 Jul 2007 20:33:23 +0000 (+0000)
Subject: better mmuhack usage
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e68ce27d43539d2699b00102d62cec9fa7c0c5b;p=libpicofe.git

better mmuhack usage

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@184 be3aeb3a-fb24-0410-a615-afba39da0efa
---

diff --git a/gp2x/main.c b/gp2x/main.c
index 61579cf..4d8317e 100644
--- a/gp2x/main.c
+++ b/gp2x/main.c
@@ -63,7 +63,7 @@ void parse_cmd_line(int argc, char *argv[])
 	}
 
 	if (unrecognized) {
-		printf("\n\n\nPicoDrive v" VERSION " (c) notaz, 2006\n");
+		printf("\n\n\nPicoDrive v" VERSION " (c) notaz, 2006-2007\n");
 		printf("usage: %s [options] [romfile]\n", argv[0]);
 		printf( "options:\n"
 				"-menu <menu_path> launch a custom program on exit instead of default gp2xmenu\n"
diff --git a/gp2x/squidgehack.c b/gp2x/squidgehack.c
index f831bd4..36e9bcb 100644
--- a/gp2x/squidgehack.c
+++ b/gp2x/squidgehack.c
@@ -12,25 +12,29 @@ extern char **g_argv;
 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);
-	}
+	int i, mmufd;
+
+	/* some programs like some versions of gpSP use some weird version of mmuhack.o
+	 * which doesn't seem to work. What's even worse they leave their mmuhack loaded on exit.
+	 * So we must remove whatever may be left and always reload _our_ mmuhack.o */
+	system("/sbin/rmmod mmuhack");
+
+	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*/