patch-2.3.99-pre6 linux/arch/ia64/kdb/kdb_io.c

• Lines: 351
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.99-pre5/linux/arch/ia64/kdb/kdb_io.c
• Orig date: Thu Feb 10 17:11:03 2000

diff -u --recursive --new-file v2.3.99-pre5/linux/arch/ia64/kdb/kdb_io.c linux/arch/ia64/kdb/kdb_io.c
@@ -1,350 +0,0 @@
-/*
- * Kernel Debugger Console I/O handler
- *
- * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) Scott Lurndal (slurn@engr.sgi.com)
- * Copyright (C) Scott Foehner (sfoehner@engr.sgi.com)
- * Copyright (C) Srinivasa Thirumalachar (sprasad@engr.sgi.com)
- *
- * Written March 1999 by Scott Lurndal at Silicon Graphics, Inc.
- *
- * Modifications from:
- *	Chuck Fleckenstein		1999/07/20
- *		Move kdb_info struct declaration to this file
- *		for cases where serial support is not compiled into
- *		the kernel.
- *
- *	Masahiro Adegawa		1999/07/20
- *		Handle some peculiarities of japanese 86/106
- *		keyboards.
- *
- *	marc@mucom.co.il		1999/07/20
- *		Catch buffer overflow for serial input.
- *
- *      Scott Foehner  
- *              Port to ia64
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/console.h>
-#include <linux/serial_reg.h>
-#include <linux/spinlock.h>
-
-#include <asm/io.h>
-
-#include "pc_keyb.h"
-
-int kdb_port = 0;
-
-/*
- * This module contains code to read characters from the keyboard or a serial
- * port.
- * 
- * It is used by the kernel debugger, and is polled, not interrupt driven.
- *
- */
-
-/*
- * send:  Send a byte to the keyboard controller.  Used primarily to 
- * 	  alter LED settings.
- */
-
-static void
-kdb_kbdsend(unsigned char byte) 
-{
-	while (inb(KBD_STATUS_REG) & KBD_STAT_IBF)
-		;
-	outb(KBD_DATA_REG, byte);
-}
-
-static void
-kdb_kbdsetled(int leds)
-{
-	kdb_kbdsend(KBD_CMD_SET_LEDS);
-	kdb_kbdsend((unsigned char)leds);
-}
-
-static void
-console_read (char *buffer, size_t bufsize)
-{
-	struct console *in;
-	struct console *out;
-	char *cp, ch;
-
-	for (in = console_drivers; in; in = in->next) {
-		if ((in->flags & CON_ENABLED) && (in->read || in->wait_key))
-			break;
-	}
-	for (out = console_drivers; out; out = out->next) {
-		if ((out->flags & CON_ENABLED) && out->write)
-			break;
-	}
-
-	if ((!in->read && !in->wait_key) || !out->write) {
-		panic("kdb_io: can't do console i/o!");
-	}
-
-	if (in->read) {
-		/* this is untested... */
-		(*in->read)(in, buffer, bufsize);
-		return;
-	}
-
-	bufsize -= 2;			/* leave room for CR & NUL terminator */
-	cp = buffer;
-	while (1) {
-		ch = (*in->wait_key)(in);
-		switch (ch) {
-		      case '\b':
-			if (cp > buffer) {
-				--cp, ++bufsize;
-				(*out->write)(out, "\b \b", 3);
-			}
-			break;
-
-		      case '\025':
-			while (cp > buffer) {
-				--cp, ++bufsize;
-				(*out->write)(out, "\b \b", 3);
-			}
-			break;
-
-		      case '\r':
-		      case '\n':
-			(*out->write)(out, "\r\n", 2);
-			*cp++ = '\n';
-			*cp++ = '\0';
-			return;
-
-		      default:
-			if (bufsize > 0) {
-				(*out->write)(out, &ch, 1);
-				--bufsize;
-				*cp++ = ch;
-			}
-			break;
-		}
-	}
-}
-
-char *
-kdb_getscancode(char *buffer, size_t bufsize)
-{
-	/*
-	 * XXX Shouldn't kdb _always_ use console based I/O?  That's what the console
-	 * abstraction is for, after all... ---davidm
-	 */
-#ifdef CONFIG_IA64_HP_SIM
-	extern spinlock_t console_lock;
-	unsigned long flags;
-
-	spin_lock_irqsave(&console_lock, flags);
-	console_read(buffer, bufsize);
-	spin_unlock_irqrestore(&console_lock, flags);
-	return buffer;
-#else /* !CONFIG_IA64_HP_SIM */
-	char	*cp = buffer;
-	int	scancode, scanstatus;
-	static int shift_lock = 0;	/* CAPS LOCK state (0-off, 1-on) */
-	static int shift_key  = 0;	/* Shift next keypress */
-	static int ctrl_key   = 0;
-	static int leds       = 2;	/* Num lock */
-	u_short keychar;
-	extern u_short plain_map[], shift_map[], ctrl_map[];
-
-	bufsize -= 2;	/* Reserve space for newline and null byte */
-
-	/*
-	 * If we came in via a serial console, we allow that to
-	 * be the input window for kdb.
-	 */
-	if (kdb_port != 0) {
-		char ch;
-		int status;
-#define serial_inp(info, offset) inb((info) + (offset))
-#define serial_out(info, offset, v) outb((v), (info) + (offset))
-
-		while(1) {
-			while ((status = serial_inp(kdb_port, UART_LSR)) 
-							& UART_LSR_DR) {
-readchar:
-				ch = serial_inp(kdb_port, UART_RX);
-				if (ch == 8) {		/* BS */
-					if (cp > buffer) {
-						--cp, bufsize++;
-						printk("%c %c", 0x08, 0x08);
-					}
-					continue;
-				}
-				serial_out(kdb_port, UART_TX, ch);
-				if (ch == 13) {		/* CR */
-					*cp++ = '\n';
-					*cp++ = '\0';
-					serial_out(kdb_port, UART_TX, 10);
-					return(buffer);
-				}
-				/*
-				 * Discard excess characters
-				 */
-				if (bufsize > 0) {
-					*cp++ = ch;
-					bufsize--;
-				} 
-			}
-			while (((status = serial_inp(kdb_port, UART_LSR)) 
-					& UART_LSR_DR) == 0);
-		}
-	}
-
-	while (1) {
-
-		/*
-		 * Wait for a valid scancode
-		 */
-
-		while ((inb(KBD_STATUS_REG) & KBD_STAT_OBF) == 0)
-			;
-
-		/*
-		 * Fetch the scancode
-		 */
-		scancode = inb(KBD_DATA_REG);
-		scanstatus = inb(KBD_STATUS_REG);
-
-		/*
-		 * Ignore mouse events.
-		 */
-		if (scanstatus & KBD_STAT_MOUSE_OBF)
-			continue;
-
-		/*
-		 * Ignore release, trigger on make
-		 * (except for shift keys, where we want to 
-		 *  keep the shift state so long as the key is
-		 *  held down).
-		 */
-
-		if (((scancode&0x7f) == 0x2a) 
-		 || ((scancode&0x7f) == 0x36)) {
-			/*
-			 * Next key may use shift table
-			 */
-			if ((scancode & 0x80) == 0) {
-				shift_key=1;
-			} else {
-				shift_key=0;
-			}
-			continue;
-		}
-
-		if ((scancode&0x7f) == 0x1d) {
-			/*
-			 * Left ctrl key
-			 */
-			if ((scancode & 0x80) == 0) {
-				ctrl_key = 1;
-			} else {
-				ctrl_key = 0;
-			}
-			continue;
-		}
-
-		if ((scancode & 0x80) != 0) 
-			continue;
-
-		scancode &= 0x7f;
-
-		/*
-	 	 * Translate scancode
-		 */
-		
-		if (scancode == 0x3a) {
-			/*
-			 * Toggle caps lock
-			 */
-			shift_lock ^= 1;
-			leds ^= 0x4;	/* toggle caps lock led */
-			
-			kdb_kbdsetled(leds);
-			continue;
-		}
-			
-		if (scancode == 0x0e) {
-			/*
-			 * Backspace
-			 */
-			if (cp > buffer) {
-				--cp, bufsize++;
-
-				/*
-				 * XXX - erase character on screen
-				 */
-				printk("%c %c", 0x08, 0x08);
-			}
-			continue;
-		}
-	
-		if (scancode == 0xe0) {
-			continue;
-		}
-
-		/*
-		 * For Japanese 86/106 keyboards 
-		 * 	See comment in drivers/char/pc_keyb.c.
-		 * 	- Masahiro Adegawa
-		 */
-		if (scancode == 0x73) {
-			scancode = 0x59;
-		} else if (scancode == 0x7d) {
-			scancode = 0x7c;
-		}
-			
-		if (!shift_lock && !shift_key) {
-			keychar = plain_map[scancode];
-		} else if (shift_lock || shift_key) {
-			keychar = shift_map[scancode];
-		} else if (ctrl_key) {
-			keychar = ctrl_map[scancode];
-		} else {
-			keychar = 0x0020;
-			printk("Unknown state/scancode (%d)\n", scancode);
-		}
-		 
-		if ((scancode & 0x7f) == 0x1c) {
-			/*
-			 * enter key.  All done.
-			 */
-			printk("\n");
-			break;
-		}
-
-		/*
-		 * echo the character.
-		 */
-		printk("%c", keychar&0xff);
-
-		if (bufsize) {
-			--bufsize;
-			*cp++ = keychar&0xff;
-		} else {
-			printk("buffer overflow\n");
-			break;
-		}
-
-	}
-
-	*cp++ = '\n';		/* White space for parser */
-	*cp++ = '\0';		/* String termination */
-
-#if defined(NOTNOW)
-	cp = buffer;
-	while (*cp) {
-		printk("char 0x%x\n", *cp++);
-	}
-#endif
-
-	return buffer;
-#endif /* !CONFIG_IA64_HP_SIM */
-}
-