diff options
| author | oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2008-04-23 16:36:02 +0000 |
|---|---|---|
| committer | oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2008-04-23 16:36:02 +0000 |
| commit | 831d41e75064130f596896974869ce5595406dec (patch) | |
| tree | 7a7d5c3d91f1cd75f667e733fe6ef9e078a1e44b /src/flash/ocl/at91sam7x/dcc.c | |
| parent | b3684491e8e5ee64f6003ec974d24f66bee5e897 (diff) | |
| download | openocd+libswd-831d41e75064130f596896974869ce5595406dec.tar.gz openocd+libswd-831d41e75064130f596896974869ce5595406dec.tar.bz2 openocd+libswd-831d41e75064130f596896974869ce5595406dec.tar.xz openocd+libswd-831d41e75064130f596896974869ce5595406dec.zip | |
Pavel Chromy's on chip flash loader
git-svn-id: svn://svn.berlios.de/openocd/trunk@612 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Diffstat (limited to 'src/flash/ocl/at91sam7x/dcc.c')
| -rw-r--r-- | src/flash/ocl/at91sam7x/dcc.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/flash/ocl/at91sam7x/dcc.c b/src/flash/ocl/at91sam7x/dcc.c new file mode 100644 index 00000000..2c352369 --- /dev/null +++ b/src/flash/ocl/at91sam7x/dcc.c @@ -0,0 +1,51 @@ +/***************************************************************************
+ * Copyright (C) 2007 by Pavel Chromy *
+ * chromy@asix.cz *
+ * *
+ * 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., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+#include "dcc.h"
+
+
+/* debug channel read (debugger->MCU) */
+uint32 dcc_rd(void)
+{
+ volatile uint32 dcc_reg;
+
+ do {
+ asm volatile ("mrc p14, 0, %0, C0, C0" : "=r" (dcc_reg) : );
+ } while ((dcc_reg&1)==0);
+
+ asm volatile ("mrc p14, 0, %0, C1, C0" : "=r" (dcc_reg) : );
+ return dcc_reg;
+}
+
+
+/* debug channel write (MCU->debugger) */
+int dcc_wr(uint32 data)
+{
+ volatile uint32 dcc_reg;
+
+ do {
+ asm volatile ("mrc p14, 0, %0, C0, C0" : "=r" (dcc_reg) : );
+ /* operation controled by master, cancel operation
+ upon reception of data for immediate response */
+ if (dcc_reg&1) return -1;
+ } while (dcc_reg&2);
+
+ asm volatile ("mcr p14, 0, %0, C1, C0" : : "r" (data));
+ return 0;
+}
|