patch-2.4.21 linux-2.4.21/arch/ia64/sn/io/sn2/l1.c

• Lines: 240
• Date: 2003-06-13 07:51:30.000000000 -0700
• Orig file: linux-2.4.20/arch/ia64/sn/io/sn2/l1.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/arch/ia64/sn/io/sn2/l1.c linux-2.4.21/arch/ia64/sn/io/sn2/l1.c
@@ -0,0 +1,239 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1992-1997, 2000-2002 Silicon Graphics, Inc.  All rights reserved.
+ */
+
+/* In general, this file is organized in a hierarchy from lower-level
+ * to higher-level layers, as follows:
+ *
+ *	UART routines
+ *	Bedrock/L1 "PPP-like" protocol implementation
+ *	System controller "message" interface (allows multiplexing
+ *		of various kinds of requests and responses with
+ *		console I/O)
+ *	Console interface:
+ *	  "l1_cons", the glue that allows the L1 to act
+ *		as the system console for the stdio libraries
+ *
+ * Routines making use of the system controller "message"-style interface
+ * can be found in l1_command.c.
+ */
+
+
+#include <linux/types.h>
+#include <linux/config.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <asm/sn/sgi.h>
+#include <asm/sn/io.h>
+#include <asm/sn/iograph.h>
+#include <asm/sn/invent.h>
+#include <asm/sn/hcl.h>
+#include <asm/sn/hcl_util.h>
+#include <asm/sn/labelcl.h>
+#include <asm/sn/eeprom.h>
+#include <asm/sn/router.h>
+#include <asm/sn/module.h>
+#include <asm/sn/ksys/l1.h>
+#include <asm/sn/nodepda.h>
+#include <asm/sn/clksupport.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/uart16550.h>
+#include <asm/sn/simulator.h>
+
+
+#define UART_BAUD_RATE          57600
+
+int 
+get_L1_baud(void)
+{
+    return UART_BAUD_RATE;
+}
+
+
+
+/* Return the current interrupt level */
+int
+l1_get_intr_value( void )
+{
+	return(0);
+}
+
+/* Disconnect the callup functions - throw away interrupts */
+
+void
+l1_unconnect_intr(void)
+{
+}
+
+/* Set up uart interrupt handling for this node's uart */
+
+void
+l1_connect_intr(void *rx_notify, void *tx_notify)
+{
+#if 0
+	// Will need code here for sn2 - something like this
+	console_nodepda = NODEPDA(NASID_TO_COMPACT_NODEID(get_master_nasid());
+	intr_connect_level(console_nodepda->node_first_cpu,
+                                SGI_UART_VECTOR, INTPEND0_MAXMASK,
+                                dummy_intr_func);
+	request_irq(SGI_UART_VECTOR | (console_nodepda->node_first_cpu << 8),
+                                intr_func, SA_INTERRUPT | SA_SHIRQ,
+                                "l1_protocol_driver", (void *)sc);
+#endif
+}
+
+
+/* These are functions to use from serial_in/out when in protocol
+ * mode to send and receive uart control regs. These are external
+ * interfaces into the protocol driver.
+ */
+
+void
+l1_control_out(int offset, int value)
+{
+	/* quietly ignore unless simulator */
+	if ( IS_RUNNING_ON_SIMULATOR() ) {
+		extern u64 master_node_bedrock_address;
+		if ( master_node_bedrock_address != (u64)0 ) {
+			writeb(value, (unsigned long)master_node_bedrock_address +
+				(offset<< 3));
+		}
+		return;
+	}
+}
+
+/* Console input exported interface. Return a register value.  */
+
+int
+l1_control_in_polled(int offset)
+{
+	static int l1_control_in_local(int);
+
+	return(l1_control_in_local(offset));
+}
+
+int
+l1_control_in(int offset)
+{
+	static int l1_control_in_local(int);
+
+	return(l1_control_in_local(offset));
+}
+
+static int
+l1_control_in_local(int offset)
+{
+	int sal_call_status = 0, input;
+	int ret = 0;
+
+	if ( IS_RUNNING_ON_SIMULATOR() ) {
+		extern u64 master_node_bedrock_address;
+		ret = readb((unsigned long)master_node_bedrock_address +
+				(offset<< 3));
+		return(ret);
+	}		
+	if ( offset == REG_LSR ) {
+		ret = (LSR_XHRE | LSR_XSRE);	/* can send anytime */
+		sal_call_status = ia64_sn_console_check(&input);
+		if ( !sal_call_status && input ) {
+			/* input pending */
+			ret |= LSR_RCA;
+		}
+	}
+	return(ret);
+}
+
+/*
+ * Console input exported interface. Return a character (if one is available)
+ */
+
+int
+l1_serial_in_polled(void)
+{
+	static int l1_serial_in_local(void);
+
+	return(l1_serial_in_local());
+}
+
+int
+l1_serial_in(void)
+{
+	static int l1_serial_in_local(void);
+
+	if ( IS_RUNNING_ON_SIMULATOR() ) {
+		extern u64 master_node_bedrock_address;
+		return(readb((unsigned long)master_node_bedrock_address + (REG_DAT<< 3)));
+	}	
+	return(l1_serial_in_local());
+}
+
+static int
+l1_serial_in_local(void)
+{
+	int ch;
+
+	if ( IS_RUNNING_ON_SIMULATOR() ) {
+		extern u64 master_node_bedrock_address;
+		return(readb((unsigned long)master_node_bedrock_address + (REG_DAT<< 3)));
+	}		
+
+	if ( !(ia64_sn_console_getc(&ch)) )
+		return(ch);
+	else
+		return(0);
+}
+
+/* Console output exported interface. Write message to the console.  */
+
+int
+l1_serial_out( char *str, int len )
+{
+	int counter = len;
+
+#if defined(CONFIG_IA64_EARLY_PRINTK)
+	/* Need to setup SAL calls so the PROM calls will work */
+	{
+		static int inited;
+		void early_sn_setup(void);
+		if(!inited) {
+			inited=1;
+			early_sn_setup();
+		}
+	}
+#endif
+
+	if ( IS_RUNNING_ON_SIMULATOR() ) {
+		extern u64 master_node_bedrock_address;
+		void early_sn_setup(void);
+		if (!master_node_bedrock_address)
+			early_sn_setup();
+		if ( master_node_bedrock_address != (u64)0 ) {
+#ifdef FLAG_DIRECT_CONSOLE_WRITES
+			/* This is an easy way to pre-pend the output to know whether the output
+			 * was done via sal or directly */
+			writeb('[', (unsigned long)master_node_bedrock_address + (REG_DAT<< 3));
+			writeb('+', (unsigned long)master_node_bedrock_address + (REG_DAT<< 3));
+			writeb(']', (unsigned long)master_node_bedrock_address + (REG_DAT<< 3));
+			writeb(' ', (unsigned long)master_node_bedrock_address + (REG_DAT<< 3));
+#endif	/* FLAG_DIRECT_CONSOLE_WRITES */
+			while ( counter > 0 ) {
+				writeb(*str, (unsigned long)master_node_bedrock_address + (REG_DAT<< 3));
+				counter--;
+				str++;
+			}
+		}
+		return(len);
+	}
+
+	/* Attempt to write things out thru the sal */
+	if ( ia64_sn_console_putb(str, len) )
+		return(0);
+	return((counter <= 0) ? 0 : (len - counter));
+}