Add a simple keyboard driver for usage of PDC I/O functions
with kgdb. This driver makes it possible to use KGDB with QEMU.
Signed-off-by: Helge Deller <deller@xxxxxx>
---
arch/parisc/kernel/toc.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/parisc/kernel/toc.c b/arch/parisc/kernel/toc.c
index 18327611cf8f..dfe7cccc086f 100644
--- a/arch/parisc/kernel/toc.c
+++ b/arch/parisc/kernel/toc.c
@@ -109,3 +109,30 @@ static __init int setup_toc(void)
return 0;
}
early_initcall(setup_toc);
+
+
+#ifdef CONFIG_KGDB_KDB
+/* read a character, return -1 if no char can be polled. */
+static int kgdbpdc_read_char(void)
+{
+ return pdc_iodc_getc();
+}
+
+static void kgdbpdc_write_char(u8 chr)
+{
+ /* no need to print char. kdb will do it. */
+}
+
+static struct kgdb_io kgdbpdc_io_ops = {
+ .name = "kgdb_pdc",
+ .read_char = kgdbpdc_read_char,
+ .write_char = kgdbpdc_write_char,
+};
+
+static int __init kgdbpdc_init(void)
+{
+ kgdb_register_io_module(&kgdbpdc_io_ops);
+ return 0;
+}
+early_initcall(kgdbpdc_init);
+#endif
--
2.31.1
