Hello,
This patch includes kgdb support on TX4938(RBHMA4500).
Please review it.
Hiroshi DOYU
-----
--- linux.orig/arch/mips/tx4938/common/dbgio.c 1970-01-01 09:00:00.000000000 +0900
+++ linux/arch/mips/tx4938/common/dbgio.c 2005-06-09 13:49:38.674565752 +0900
@@ -0,0 +1,47 @@
+/*
+ * linux/arch/mips/tx4938/common/dbgio.c
+ *
+ * kgdb interface for gdb
+ *
+ * Author: MontaVista Software, Inc.
+ * source@xxxxxxxxxx
+ *
+ * Copyright 2005 MontaVista Software Inc.
+ *
+ * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+#include <asm/tx4928/tx4928_mips.h>
+
+u8 getDebugChar(void)
+{
+ extern u8 txx9_sio_kdbg_rd(void);
+ return (txx9_sio_kdbg_rd());
+}
+
+
+int putDebugChar(u8 byte)
+{
+ extern int txx9_sio_kdbg_wr( u8 ch );
+ return (txx9_sio_kdbg_wr(byte));
+}
--- linux.orig/drivers/serial/serial_txx9.c 2005-05-26 18:12:46.000000000 +0900
+++ linux/drivers/serial/serial_txx9.c 2005-06-09 11:17:34.000000000 +0900
@@ -1129,6 +1129,96 @@
MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
#endif /* ENABLE_SERIAL_TXX9_PCI */
+/******************************************************************************/
+/* BEG: KDBG Routines */
+/******************************************************************************/
+
+#ifdef CONFIG_KGDB
+int kgdb_init_count = 0;
+
+void txx9_sio_kgdb_hook(unsigned int port, unsigned int baud_rate)
+{
+ static struct resource kgdb_resource;
+ int ret;
+ struct uart_txx9_port *up = &serial_txx9_ports[port];
+
+ /* prevent initialization by driver */
+ kgdb_resource.name = "serial_txx9(debug)";
+ kgdb_resource.start = up->port.membase;
+ kgdb_resource.end = up->port.membase + 36 - 1;
+ kgdb_resource.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+ ret = request_resource(&iomem_resource, &kgdb_resource);
+ if(ret == -EBUSY)
+ printk(" serial_txx9(debug): request_resource failed\n");
+
+ return;
+}
+void
+txx9_sio_kdbg_init( unsigned int port_number )
+{
+ if (port_number == 1) {
+ txx9_sio_kgdb_hook(port_number, 38400);
+ } else {
+ printk("Bad Port Number [%u] != [1]\n",port_number);
+ }
+ return;
+}
+
+u8
+txx9_sio_kdbg_rd( void )
+{
+ unsigned int status,ch;
+ struct uart_txx9_port *up = &serial_txx9_ports[1];
+
+ if (kgdb_init_count == 0) {
+ txx9_sio_kdbg_init(1);
+ kgdb_init_count = 1;
+ }
+
+ while (1) {
+ status = sio_in(up, TXX9_SIDISR);
+ if ( status & 0x1f ) {
+ ch = sio_in(up, TXX9_SIRFIFO );
+ break;
+ }
+ }
+
+ return (ch);
+}
+
+int
+txx9_sio_kdbg_wr( u8 ch )
+{
+ unsigned int status;
+ struct uart_txx9_port *up = &serial_txx9_ports[1];
+
+ if (kgdb_init_count == 0) {
+ txx9_sio_kdbg_init(1);
+ kgdb_init_count = 1;
+ }
+
+ while (1) {
+ status = sio_in(up, TXX9_SICISR);
+ if (status & TXX9_SICISR_TRDY) {
+ if ( ch == '\n' ) {
+ txx9_sio_kdbg_wr( '\r' );
+ }
+ sio_out(up, TXX9_SITFIFO, (u32)ch );
+
+ break;
+ }
+ }
+
+ return (1);
+}
+#endif /* CONFIG_KGDB */
+
+
+/******************************************************************************/
+/* END: KDBG Routines */
+/******************************************************************************/
+
static int __init serial_txx9_init(void)
{
int ret;
