patch-2.4.4 linux/arch/mips/mips-boards/generic/printf.c

• Lines: 141
• Date: Fri Apr 13 20:26:07 2001
• Orig file: v2.4.3/linux/arch/mips/mips-boards/generic/printf.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/mips/mips-boards/generic/printf.c linux/arch/mips/mips-boards/generic/printf.c
@@ -0,0 +1,140 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 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.
+ *
+ * ########################################################################
+ *
+ * Putting things on the screen/serial line using YAMONs facilities.
+ *
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/serialP.h>
+#include <linux/serial_reg.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/serial.h>
+
+
+#ifdef CONFIG_MIPS_ATLAS 
+/* 
+ * Atlas registers are memory mapped on 64-bit aligned boundaries and 
+ * only word access are allowed.
+ * When reading the UART 8 bit registers only the LSB are valid.
+ */
+unsigned int atlas_serial_in(struct async_struct *info, int offset)
+{
+	return (*(volatile unsigned int *)(info->port + mips_io_port_base + offset*8) & 0xff);
+}
+
+void atlas_serial_out(struct async_struct *info, int offset, int value)
+{
+	*(volatile unsigned int *)(info->port + mips_io_port_base + offset*8) = value;
+}
+
+#define serial_in  atlas_serial_in
+#define serial_out atlas_serial_out
+
+#else
+
+static unsigned int serial_in(struct async_struct *info, int offset)
+{
+	return inb(info->port + offset);
+}
+
+static void serial_out(struct async_struct *info, int offset,
+				int value)
+{
+	outb(value, info->port + offset);
+}
+#endif
+
+static struct serial_state rs_table[] = {
+	SERIAL_PORT_DFNS	/* Defined in serial.h */
+};
+
+/*
+ * Hooks to fake "prom" console I/O before devices 
+ * are fully initialized. 
+ */
+static struct async_struct prom_port_info = {0};
+
+void __init setup_prom_printf(int tty_no) {
+	struct serial_state *ser = &rs_table[tty_no];
+
+	prom_port_info.state = ser;
+	prom_port_info.magic = SERIAL_MAGIC;
+	prom_port_info.port = ser->port;
+	prom_port_info.flags = ser->flags;
+
+	/* No setup of UART - assume YAMON left in sane state */
+}
+
+int putPromChar(char c)
+{
+        if (!prom_port_info.state) { 	/* need to init device first */
+		return 0;
+	}
+
+	while ((serial_in(&prom_port_info, UART_LSR) & UART_LSR_THRE) == 0)
+		;
+
+	serial_out(&prom_port_info, UART_TX, c);
+
+	return 1;
+}
+
+char getPromChar(void)
+{
+	if (!prom_port_info.state) { 	/* need to init device first */
+		return 0;
+	}
+
+	while (!(serial_in(&prom_port_info, UART_LSR) & 1))
+		;
+
+	return(serial_in(&prom_port_info, UART_RX));
+}
+
+static char buf[1024];
+
+void __init prom_printf(char *fmt, ...)
+{
+	va_list args;
+	int l;
+	char *p, *buf_end;
+	long flags;
+
+	int putPromChar(char);
+
+	/* Low level, brute force, not SMP safe... */
+	save_and_cli(flags);
+	va_start(args, fmt);
+	l = vsprintf(buf, fmt, args); /* hopefully i < sizeof(buf) */
+	va_end(args);
+
+	buf_end = buf + l;
+
+	for (p = buf; p < buf_end; p++) {
+		/* Crude cr/nl handling is better than none */
+		if(*p == '\n')putPromChar('\r');
+		putPromChar(*p);
+	}
+	restore_flags(flags);
+}