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Diffstat (limited to 'arch/mips/mips-boards/atlas/atlas_gdb.c')
-rw-r--r--arch/mips/mips-boards/atlas/atlas_gdb.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/arch/mips/mips-boards/atlas/atlas_gdb.c b/arch/mips/mips-boards/atlas/atlas_gdb.c
new file mode 100644
index 000000000000..fb65280f1780
--- /dev/null
+++ b/arch/mips/mips-boards/atlas/atlas_gdb.c
@@ -0,0 +1,97 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * This is the interface to the remote debugger stub.
+ */
+#include <asm/io.h>
+#include <asm/mips-boards/atlas.h>
+#include <asm/mips-boards/saa9730_uart.h>
+
+#define INB(a) inb((unsigned long)a)
+#define OUTB(x,a) outb(x,(unsigned long)a)
+
+/*
+ * This is the interface to the remote debugger stub
+ * if the Philips part is used for the debug port,
+ * called from the platform setup code.
+ */
+void *saa9730_base = (void *)ATLAS_SAA9730_REG;
+
+static int saa9730_kgdb_active = 0;
+
+#define SAA9730_BAUDCLOCK(baud) (((ATLAS_SAA9730_BAUDCLOCK/(baud))/16)-1)
+
+int saa9730_kgdb_hook(int speed)
+{
+ int baudclock;
+ t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
+
+ /*
+ * Clear all interrupts
+ */
+ (void) INB(&kgdb_uart->Lsr);
+ (void) INB(&kgdb_uart->Msr);
+ (void) INB(&kgdb_uart->Thr_Rbr);
+ (void) INB(&kgdb_uart->Iir_Fcr);
+
+ /*
+ * Now, initialize the UART
+ */
+ /* 8 data bits, one stop bit, no parity */
+ OUTB(SAA9730_LCR_DATA8, &kgdb_uart->Lcr);
+
+ baudclock = SAA9730_BAUDCLOCK(speed);
+
+ OUTB((baudclock >> 16) & 0xff, &kgdb_uart->BaudDivMsb);
+ OUTB( baudclock & 0xff, &kgdb_uart->BaudDivLsb);
+
+ /* Set RTS/DTR active */
+ OUTB(SAA9730_MCR_DTR | SAA9730_MCR_RTS, &kgdb_uart->Mcr);
+ saa9730_kgdb_active = 1;
+
+ return speed;
+}
+
+int saa9730_putDebugChar(char c)
+{
+ t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
+
+ if (!saa9730_kgdb_active) { /* need to init device first */
+ return 0;
+ }
+
+ while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_THRE))
+ ;
+ OUTB(c, &kgdb_uart->Thr_Rbr);
+
+ return 1;
+}
+
+char saa9730_getDebugChar(void)
+{
+ t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
+ char c;
+
+ if (!saa9730_kgdb_active) { /* need to init device first */
+ return 0;
+ }
+ while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_DR))
+ ;
+
+ c = INB(&kgdb_uart->Thr_Rbr);
+ return(c);
+}