aboutsummaryrefslogtreecommitdiff
path: root/arch/sparc/prom/console_64.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/prom/console_64.c')
-rw-r--r--arch/sparc/prom/console_64.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/sparc/prom/console_64.c b/arch/sparc/prom/console_64.c
new file mode 100644
index 000000000000..e1c3fc87484d
--- /dev/null
+++ b/arch/sparc/prom/console_64.c
@@ -0,0 +1,74 @@
+/* console.c: Routines that deal with sending and receiving IO
+ * to/from the current console device using the PROM.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/system.h>
+#include <linux/string.h>
+
+extern int prom_stdin, prom_stdout;
+
+/* Non blocking get character from console input device, returns -1
+ * if no input was taken. This can be used for polling.
+ */
+inline int
+prom_nbgetchar(void)
+{
+ char inc;
+
+ if (p1275_cmd("read", P1275_ARG(1,P1275_ARG_OUT_BUF)|
+ P1275_INOUT(3,1),
+ prom_stdin, &inc, P1275_SIZE(1)) == 1)
+ return inc;
+ else
+ return -1;
+}
+
+/* Non blocking put character to console device, returns -1 if
+ * unsuccessful.
+ */
+inline int
+prom_nbputchar(char c)
+{
+ char outc;
+
+ outc = c;
+ if (p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
+ P1275_INOUT(3,1),
+ prom_stdout, &outc, P1275_SIZE(1)) == 1)
+ return 0;
+ else
+ return -1;
+}
+
+/* Blocking version of get character routine above. */
+char
+prom_getchar(void)
+{
+ int character;
+ while((character = prom_nbgetchar()) == -1) ;
+ return (char) character;
+}
+
+/* Blocking version of put character routine above. */
+void
+prom_putchar(char c)
+{
+ prom_nbputchar(c);
+ return;
+}
+
+void
+prom_puts(const char *s, int len)
+{
+ p1275_cmd("write", P1275_ARG(1,P1275_ARG_IN_BUF)|
+ P1275_INOUT(3,1),
+ prom_stdout, s, P1275_SIZE(len));
+}