Merge branch 'linus' into timers/nohz

1 files changed, 0 insertions, 866 deletions

diff --git a/arch/ppc/kernel/ppc-stub.c b/arch/ppc/kernel/ppc-stub.c
deleted file mode 100644
index 5f9ee7bb67ec..000000000000
--- a/arch/ppc/kernel/ppc-stub.c
+++ /dev/null
@@ -1,866 +0,0 @@
-/*
- * ppc-stub.c:  KGDB support for the Linux kernel.
- *
- * adapted from arch/sparc/kernel/sparc-stub.c for the PowerPC
- * some stuff borrowed from Paul Mackerras' xmon
- * Copyright (C) 1998 Michael AK Tesch (tesch@cs.wisc.edu)
- *
- * Modifications to run under Linux
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- *
- * This file originally came from the gdb sources, and the
- * copyright notices have been retained below.
- */
-
-/****************************************************************************
-
-		THIS SOFTWARE IS NOT COPYRIGHTED
-
-   HP offers the following for use in the public domain.  HP makes no
-   warranty with regard to the software or its performance and the
-   user accepts the software "AS IS" with all faults.
-
-   HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
-   TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-
-****************************************************************************/
-
-/****************************************************************************
- *  Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
- *
- *  Module name: remcom.c $
- *  Revision: 1.34 $
- *  Date: 91/03/09 12:29:49 $
- *  Contributor:     Lake Stevens Instrument Division$
- *
- *  Description:     low level support for gdb debugger. $
- *
- *  Considerations:  only works on target hardware $
- *
- *  Written by:      Glenn Engel $
- *  ModuleState:     Experimental $
- *
- *  NOTES:           See Below $
- *
- *  Modified for SPARC by Stu Grossman, Cygnus Support.
- *
- *  This code has been extensively tested on the Fujitsu SPARClite demo board.
- *
- *  To enable debugger support, two things need to happen.  One, a
- *  call to set_debug_traps() is necessary in order to allow any breakpoints
- *  or error conditions to be properly intercepted and reported to gdb.
- *  Two, a breakpoint needs to be generated to begin communication.  This
- *  is most easily accomplished by a call to breakpoint().  Breakpoint()
- *  simulates a breakpoint by executing a trap #1.
- *
- *************
- *
- *    The following gdb commands are supported:
- *
- * command          function		          Return value
- *
- *    g             return the value of the CPU registers  hex data or ENN
- *    G             set the value of the CPU registers     OK or ENN
- *    qOffsets      Get section offsets.  Reply is Text=xxx;Data=yyy;Bss=zzz
- *
- *    mAA..AA,LLLL  Read LLLL bytes at address AA..AA      hex data or ENN
- *    MAA..AA,LLLL: Write LLLL bytes at address AA.AA      OK or ENN
- *
- *    c             Resume at current address              SNN   ( signal NN)
- *    cAA..AA       Continue at address AA..AA             SNN
- *
- *    s             Step one instruction                   SNN
- *    sAA..AA       Step one instruction from AA..AA       SNN
- *
- *    k             kill
- *
- *    ?             What was the last sigval ?             SNN   (signal NN)
- *
- *    bBB..BB	    Set baud rate to BB..BB		   OK or BNN, then sets
- *							   baud rate
- *
- * All commands and responses are sent with a packet which includes a
- * checksum.  A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum>    :: <two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer.  '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host:                  Reply:
- * $m0,10#2a               +$00010203040506070809101112131415#42
- *
- ****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/init.h>
-#include <linux/sysrq.h>
-
-#include <asm/cacheflush.h>
-#include <asm/system.h>
-#include <asm/signal.h>
-#include <asm/kgdb.h>
-#include <asm/pgtable.h>
-#include <asm/ptrace.h>
-
-void breakinst(void);
-
-/*
- * BUFMAX defines the maximum number of characters in inbound/outbound buffers
- * at least NUMREGBYTES*2 are needed for register packets
- */
-#define BUFMAX 2048
-static char remcomInBuffer[BUFMAX];
-static char remcomOutBuffer[BUFMAX];
-
-static int initialized;
-static int kgdb_active;
-static int kgdb_started;
-static u_int fault_jmp_buf[100];
-static int kdebug;
-
-
-static const char hexchars[]="0123456789abcdef";
-
-/* Place where we save old trap entries for restoration - sparc*/
-/* struct tt_entry kgdb_savettable[256]; */
-/* typedef void (*trapfunc_t)(void); */
-
-static void kgdb_fault_handler(struct pt_regs *regs);
-static int handle_exception (struct pt_regs *regs);
-
-#if 0
-/* Install an exception handler for kgdb */
-static void exceptionHandler(int tnum, unsigned int *tfunc)
-{
-	/* We are dorking with a live trap table, all irqs off */
-}
-#endif
-
-int
-kgdb_setjmp(long *buf)
-{
-	asm ("mflr 0; stw 0,0(%0);"
-	     "stw 1,4(%0); stw 2,8(%0);"
-	     "mfcr 0; stw 0,12(%0);"
-	     "stmw 13,16(%0)"
-	     : : "r" (buf));
-	/* XXX should save fp regs as well */
-	return 0;
-}
-void
-kgdb_longjmp(long *buf, int val)
-{
-	if (val == 0)
-		val = 1;
-	asm ("lmw 13,16(%0);"
-	     "lwz 0,12(%0); mtcrf 0x38,0;"
-	     "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
-	     "mtlr 0; mr 3,%1"
-	     : : "r" (buf), "r" (val));
-}
-/* Convert ch from a hex digit to an int */
-static int
-hex(unsigned char ch)
-{
-	if (ch >= 'a' && ch <= 'f')
-		return ch-'a'+10;
-	if (ch >= '0' && ch <= '9')
-		return ch-'0';
-	if (ch >= 'A' && ch <= 'F')
-		return ch-'A'+10;
-	return -1;
-}
-
-/* Convert the memory pointed to by mem into hex, placing result in buf.
- * Return a pointer to the last char put in buf (null), in case of mem fault,
- * return 0.
- */
-static unsigned char *
-mem2hex(const char *mem, char *buf, int count)
-{
-	unsigned char ch;
-	unsigned short tmp_s;
-	unsigned long tmp_l;
-
-	if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
-		debugger_fault_handler = kgdb_fault_handler;
-
-		/* Accessing 16 bit and 32 bit objects in a single
-		** load instruction is required to avoid bad side
-		** effects for some IO registers.
-		*/
-
-		if ((count == 2) && (((long)mem & 1) == 0)) {
-			tmp_s = *(unsigned short *)mem;
-			mem += 2;
-			*buf++ = hexchars[(tmp_s >> 12) & 0xf];
-			*buf++ = hexchars[(tmp_s >> 8) & 0xf];
-			*buf++ = hexchars[(tmp_s >> 4) & 0xf];
-			*buf++ = hexchars[tmp_s & 0xf];
-
-		} else if ((count == 4) && (((long)mem & 3) == 0)) {
-			tmp_l = *(unsigned int *)mem;
-			mem += 4;
-			*buf++ = hexchars[(tmp_l >> 28) & 0xf];
-			*buf++ = hexchars[(tmp_l >> 24) & 0xf];
-			*buf++ = hexchars[(tmp_l >> 20) & 0xf];
-			*buf++ = hexchars[(tmp_l >> 16) & 0xf];
-			*buf++ = hexchars[(tmp_l >> 12) & 0xf];
-			*buf++ = hexchars[(tmp_l >> 8) & 0xf];
-			*buf++ = hexchars[(tmp_l >> 4) & 0xf];
-			*buf++ = hexchars[tmp_l & 0xf];
-
-		} else {
-			while (count-- > 0) {
-				ch = *mem++;
-				*buf++ = hexchars[ch >> 4];
-				*buf++ = hexchars[ch & 0xf];
-			}
-		}
-
-	} else {
-		/* error condition */
-	}
-	debugger_fault_handler = NULL;
-	*buf = 0;
-	return buf;
-}
-
-/* convert the hex array pointed to by buf into binary to be placed in mem
- * return a pointer to the character AFTER the last byte written.
-*/
-static char *
-hex2mem(char *buf, char *mem, int count)
-{
-	unsigned char ch;
-	int i;
-	char *orig_mem;
-	unsigned short tmp_s;
-	unsigned long tmp_l;
-
-	orig_mem = mem;
-
-	if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
-		debugger_fault_handler = kgdb_fault_handler;
-
-		/* Accessing 16 bit and 32 bit objects in a single
-		** store instruction is required to avoid bad side
-		** effects for some IO registers.
-		*/
-
-		if ((count == 2) && (((long)mem & 1) == 0)) {
-			tmp_s = hex(*buf++) << 12;
-			tmp_s |= hex(*buf++) << 8;
-			tmp_s |= hex(*buf++) << 4;
-			tmp_s |= hex(*buf++);
-
-			*(unsigned short *)mem = tmp_s;
-			mem += 2;
-
-		} else if ((count == 4) && (((long)mem & 3) == 0)) {
-			tmp_l = hex(*buf++) << 28;
-			tmp_l |= hex(*buf++) << 24;
-			tmp_l |= hex(*buf++) << 20;
-			tmp_l |= hex(*buf++) << 16;
-			tmp_l |= hex(*buf++) << 12;
-			tmp_l |= hex(*buf++) << 8;
-			tmp_l |= hex(*buf++) << 4;
-			tmp_l |= hex(*buf++);
-
-			*(unsigned long *)mem = tmp_l;
-			mem += 4;
-
-		} else {
-			for (i=0; i<count; i++) {
-				ch = hex(*buf++) << 4;
-				ch |= hex(*buf++);
-				*mem++ = ch;
-			}
-		}
-
-
-		/*
-		** Flush the data cache, invalidate the instruction cache.
-		*/
-		flush_icache_range((int)orig_mem, (int)orig_mem + count - 1);
-
-	} else {
-		/* error condition */
-	}
-	debugger_fault_handler = NULL;
-	return mem;
-}
-
-/*
- * While we find nice hex chars, build an int.
- * Return number of chars processed.
- */
-static int
-hexToInt(char **ptr, int *intValue)
-{
-	int numChars = 0;
-	int hexValue;
-
-	*intValue = 0;
-
-	if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
-		debugger_fault_handler = kgdb_fault_handler;
-		while (**ptr) {
-			hexValue = hex(**ptr);
-			if (hexValue < 0)
-				break;
-
-			*intValue = (*intValue << 4) | hexValue;
-			numChars ++;
-
-			(*ptr)++;
-		}
-	} else {
-		/* error condition */
-	}
-	debugger_fault_handler = NULL;
-
-	return (numChars);
-}
-
-/* scan for the sequence $<data>#<checksum> */
-static void
-getpacket(char *buffer)
-{
-	unsigned char checksum;
-	unsigned char xmitcsum;
-	int i;
-	int count;
-	unsigned char ch;
-
-	do {
-		/* wait around for the start character, ignore all other
-		 * characters */
-		while ((ch = (getDebugChar() & 0x7f)) != '$') ;
-
-		checksum = 0;
-		xmitcsum = -1;
-
-		count = 0;
-
-		/* now, read until a # or end of buffer is found */
-		while (count < BUFMAX) {
-			ch = getDebugChar() & 0x7f;
-			if (ch == '#')
-				break;
-			checksum = checksum + ch;
-			buffer[count] = ch;
-			count = count + 1;
-		}
-
-		if (count >= BUFMAX)
-			continue;
-
-		buffer[count] = 0;
-
-		if (ch == '#') {
-			xmitcsum = hex(getDebugChar() & 0x7f) << 4;
-			xmitcsum |= hex(getDebugChar() & 0x7f);
-			if (checksum != xmitcsum)
-				putDebugChar('-');	/* failed checksum */
-			else {
-				putDebugChar('+'); /* successful transfer */
-				/* if a sequence char is present, reply the ID */
-				if (buffer[2] == ':') {
-					putDebugChar(buffer[0]);
-					putDebugChar(buffer[1]);
-					/* remove sequence chars from buffer */
-					count = strlen(buffer);
-					for (i=3; i <= count; i++)
-						buffer[i-3] = buffer[i];
-				}
-			}
-		}
-	} while (checksum != xmitcsum);
-}
-
-/* send the packet in buffer. */
-static void putpacket(unsigned char *buffer)
-{
-	unsigned char checksum;
-	int count;
-	unsigned char ch, recv;
-
-	/* $<packet info>#<checksum>. */
-	do {
-		putDebugChar('$');
-		checksum = 0;
-		count = 0;
-
-		while ((ch = buffer[count])) {
-			putDebugChar(ch);
-			checksum += ch;
-			count += 1;
-		}
-
-		putDebugChar('#');
-		putDebugChar(hexchars[checksum >> 4]);
-		putDebugChar(hexchars[checksum & 0xf]);
-		recv = getDebugChar();
-	} while ((recv & 0x7f) != '+');
-}
-
-static void kgdb_flush_cache_all(void)
-{
-	flush_instruction_cache();
-}
-
-/* Set up exception handlers for tracing and breakpoints
- * [could be called kgdb_init()]
- */
-void set_debug_traps(void)
-{
-#if 0
-	unsigned char c;
-
-	save_and_cli(flags);
-
-	/* In case GDB is started before us, ack any packets (presumably
-	 * "$?#xx") sitting there.
-	 *
-	 * I've found this code causes more problems than it solves,
-	 * so that's why it's commented out.  GDB seems to work fine
-	 * now starting either before or after the kernel   -bwb
-	 */
-
-	while((c = getDebugChar()) != '$');
-	while((c = getDebugChar()) != '#');
-	c = getDebugChar(); /* eat first csum byte */
-	c = getDebugChar(); /* eat second csum byte */
-	putDebugChar('+'); /* ack it */
-#endif
-	debugger = kgdb;
-	debugger_bpt = kgdb_bpt;
-	debugger_sstep = kgdb_sstep;
-	debugger_iabr_match = kgdb_iabr_match;
-	debugger_dabr_match = kgdb_dabr_match;
-
-	initialized = 1;
-}
-
-static void kgdb_fault_handler(struct pt_regs *regs)
-{
-	kgdb_longjmp((long*)fault_jmp_buf, 1);
-}
-
-int kgdb_bpt(struct pt_regs *regs)
-{
-	return handle_exception(regs);
-}
-
-int kgdb_sstep(struct pt_regs *regs)
-{
-	return handle_exception(regs);
-}
-
-void kgdb(struct pt_regs *regs)
-{
-	handle_exception(regs);
-}
-
-int kgdb_iabr_match(struct pt_regs *regs)
-{
-	printk(KERN_ERR "kgdb doesn't support iabr, what?!?\n");
-	return handle_exception(regs);
-}
-
-int kgdb_dabr_match(struct pt_regs *regs)
-{
-	printk(KERN_ERR "kgdb doesn't support dabr, what?!?\n");
-	return handle_exception(regs);
-}
-
-/* Convert the hardware trap type code to a unix signal number. */
-/*
- * This table contains the mapping between PowerPC hardware trap types, and
- * signals, which are primarily what GDB understands.
- */
-static struct hard_trap_info
-{
-	unsigned int tt;		/* Trap type code for powerpc */
-	unsigned char signo;		/* Signal that we map this trap into */
-} hard_trap_info[] = {
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
-	{ 0x100, SIGINT  },		/* critical input interrupt */
-	{ 0x200, SIGSEGV },		/* machine check */
-	{ 0x300, SIGSEGV },		/* data storage */
-	{ 0x400, SIGBUS  },		/* instruction storage */
-	{ 0x500, SIGINT  },		/* interrupt */
-	{ 0x600, SIGBUS  },		/* alignment */
-	{ 0x700, SIGILL  },		/* program */
-	{ 0x800, SIGILL  },		/* reserved */
-	{ 0x900, SIGILL  },		/* reserved */
-	{ 0xa00, SIGILL  },		/* reserved */
-	{ 0xb00, SIGILL  },		/* reserved */
-	{ 0xc00, SIGCHLD },		/* syscall */
-	{ 0xd00, SIGILL  },		/* reserved */
-	{ 0xe00, SIGILL  },		/* reserved */
-	{ 0xf00, SIGILL  },		/* reserved */
-	/*
-	** 0x1000  PIT
-	** 0x1010  FIT
-	** 0x1020  watchdog
-	** 0x1100  data TLB miss
-	** 0x1200  instruction TLB miss
-	*/
-	{ 0x2002, SIGTRAP},		/* debug */
-#else
-	{ 0x200, SIGSEGV },		/* machine check */
-	{ 0x300, SIGSEGV },		/* address error (store) */
-	{ 0x400, SIGBUS },		/* instruction bus error */
-	{ 0x500, SIGINT },		/* interrupt */
-	{ 0x600, SIGBUS },		/* alingment */
-	{ 0x700, SIGTRAP },		/* breakpoint trap */
-	{ 0x800, SIGFPE },		/* fpu unavail */
-	{ 0x900, SIGALRM },		/* decrementer */
-	{ 0xa00, SIGILL },		/* reserved */
-	{ 0xb00, SIGILL },		/* reserved */
-	{ 0xc00, SIGCHLD },		/* syscall */
-	{ 0xd00, SIGTRAP },		/* single-step/watch */
-	{ 0xe00, SIGFPE },		/* fp assist */
-#endif
-	{ 0, 0}				/* Must be last */
-
-};
-
-static int computeSignal(unsigned int tt)
-{
-	struct hard_trap_info *ht;
-
-	for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
-		if (ht->tt == tt)
-			return ht->signo;
-
-	return SIGHUP; /* default for things we don't know about */
-}
-
-#define PC_REGNUM 64
-#define SP_REGNUM 1
-
-/*
- * This function does all command processing for interfacing to gdb.
- */
-static int
-handle_exception (struct pt_regs *regs)
-{
-	int sigval;
-	int addr;
-	int length;
-	char *ptr;
-	unsigned int msr;
-
-	/* We don't handle user-mode breakpoints. */
-	if (user_mode(regs))
-		return 0;
-
-	if (debugger_fault_handler) {
-		debugger_fault_handler(regs);
-		panic("kgdb longjump failed!\n");
-	}
-	if (kgdb_active) {
-		printk(KERN_ERR "interrupt while in kgdb, returning\n");
-		return 0;
-	}
-
-	kgdb_active = 1;
-	kgdb_started = 1;
-
-#ifdef KGDB_DEBUG
-	printk("kgdb: entering handle_exception; trap [0x%x]\n",
-			(unsigned int)regs->trap);
-#endif
-
-	kgdb_interruptible(0);
-	lock_kernel();
-	msr = mfmsr();
-	mtmsr(msr & ~MSR_EE);	/* disable interrupts */
-
-	if (regs->nip == (unsigned long)breakinst) {
-		/* Skip over breakpoint trap insn */
-		regs->nip += 4;
-	}
-
-	/* reply to host that an exception has occurred */
-	sigval = computeSignal(regs->trap);
-	ptr = remcomOutBuffer;
-
-	*ptr++ = 'T';
-	*ptr++ = hexchars[sigval >> 4];
-	*ptr++ = hexchars[sigval & 0xf];
-	*ptr++ = hexchars[PC_REGNUM >> 4];
-	*ptr++ = hexchars[PC_REGNUM & 0xf];
-	*ptr++ = ':';
-	ptr = mem2hex((char *)&regs->nip, ptr, 4);
-	*ptr++ = ';';
-	*ptr++ = hexchars[SP_REGNUM >> 4];
-	*ptr++ = hexchars[SP_REGNUM & 0xf];
-	*ptr++ = ':';
-	ptr = mem2hex(((char *)regs) + SP_REGNUM*4, ptr, 4);
-	*ptr++ = ';';
-	*ptr++ = 0;
-
-	putpacket(remcomOutBuffer);
-	if (kdebug)
-		printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-
-	/* XXX We may want to add some features dealing with poking the
-	 * XXX page tables, ... (look at sparc-stub.c for more info)
-	 * XXX also required hacking to the gdb sources directly...
-	 */
-
-	while (1) {
-		remcomOutBuffer[0] = 0;
-
-		getpacket(remcomInBuffer);
-		switch (remcomInBuffer[0]) {
-		case '?': /* report most recent signal */
-			remcomOutBuffer[0] = 'S';
-			remcomOutBuffer[1] = hexchars[sigval >> 4];
-			remcomOutBuffer[2] = hexchars[sigval & 0xf];
-			remcomOutBuffer[3] = 0;
-			break;
-#if 0
-		case 'q': /* this screws up gdb for some reason...*/
-		{
-			extern long _start, sdata, __bss_start;
-
-			ptr = &remcomInBuffer[1];
-			if (strncmp(ptr, "Offsets", 7) != 0)
-				break;
-
-			ptr = remcomOutBuffer;
-			sprintf(ptr, "Text=%8.8x;Data=%8.8x;Bss=%8.8x",
-				&_start, &sdata, &__bss_start);
-			break;
-		}
-#endif
-		case 'd':
-			/* toggle debug flag */
-			kdebug ^= 1;
-			break;
-
-		case 'g':	/* return the value of the CPU registers.
-				 * some of them are non-PowerPC names :(
-				 * they are stored in gdb like:
-				 * struct {
-				 *     u32 gpr[32];
-				 *     f64 fpr[32];
-				 *     u32 pc, ps, cnd, lr; (ps=msr)
-				 *     u32 cnt, xer, mq;
-				 * }
-				 */
-		{
-			int i;
-			ptr = remcomOutBuffer;
-			/* General Purpose Regs */
-			ptr = mem2hex((char *)regs, ptr, 32 * 4);
-			/* Floating Point Regs - FIXME */
-			/*ptr = mem2hex((char *), ptr, 32 * 8);*/
-			for(i=0; i<(32*8*2); i++) { /* 2chars/byte */
-				ptr[i] = '0';
-			}
-			ptr += 32*8*2;
-			/* pc, msr, cr, lr, ctr, xer, (mq is unused) */
-			ptr = mem2hex((char *)&regs->nip, ptr, 4);
-			ptr = mem2hex((char *)&regs->msr, ptr, 4);
-			ptr = mem2hex((char *)&regs->ccr, ptr, 4);
-			ptr = mem2hex((char *)&regs->link, ptr, 4);
-			ptr = mem2hex((char *)&regs->ctr, ptr, 4);
-			ptr = mem2hex((char *)&regs->xer, ptr, 4);
-		}
-			break;
-
-		case 'G': /* set the value of the CPU registers */
-		{
-			ptr = &remcomInBuffer[1];
-
-			/*
-			 * If the stack pointer has moved, you should pray.
-			 * (cause only god can help you).
-			 */
-
-			/* General Purpose Regs */
-			hex2mem(ptr, (char *)regs, 32 * 4);
-
-			/* Floating Point Regs - FIXME?? */
-			/*ptr = hex2mem(ptr, ??, 32 * 8);*/
-			ptr += 32*8*2;
-
-			/* pc, msr, cr, lr, ctr, xer, (mq is unused) */
-			ptr = hex2mem(ptr, (char *)&regs->nip, 4);
-			ptr = hex2mem(ptr, (char *)&regs->msr, 4);
-			ptr = hex2mem(ptr, (char *)&regs->ccr, 4);
-			ptr = hex2mem(ptr, (char *)&regs->link, 4);
-			ptr = hex2mem(ptr, (char *)&regs->ctr, 4);
-			ptr = hex2mem(ptr, (char *)&regs->xer, 4);
-
-			strcpy(remcomOutBuffer,"OK");
-		}
-			break;
-		case 'H':
-			/* don't do anything, yet, just acknowledge */
-			hexToInt(&ptr, &addr);
-			strcpy(remcomOutBuffer,"OK");
-			break;
-
-		case 'm':	/* mAA..AA,LLLL  Read LLLL bytes at address AA..AA */
-				/* Try to read %x,%x.  */
-
-			ptr = &remcomInBuffer[1];
-
-			if (hexToInt(&ptr, &addr) && *ptr++ == ','
-					&& hexToInt(&ptr, &length)) {
-				if (mem2hex((char *)addr, remcomOutBuffer,
-							length))
-					break;
-				strcpy(remcomOutBuffer, "E03");
-			} else
-				strcpy(remcomOutBuffer, "E01");
-			break;
-
-		case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
-			/* Try to read '%x,%x:'.  */
-
-			ptr = &remcomInBuffer[1];
-
-			if (hexToInt(&ptr, &addr) && *ptr++ == ','
-					&& hexToInt(&ptr, &length)
-					&& *ptr++ == ':') {
-				if (hex2mem(ptr, (char *)addr, length))
-					strcpy(remcomOutBuffer, "OK");
-				else
-					strcpy(remcomOutBuffer, "E03");
-				flush_icache_range(addr, addr+length);
-			} else
-				strcpy(remcomOutBuffer, "E02");
-			break;
-
-
-		case 'k': /* kill the program, actually just continue */
-		case 'c': /* cAA..AA  Continue; address AA..AA optional */
-			/* try to read optional parameter, pc unchanged if no parm */
-
-			ptr = &remcomInBuffer[1];
-			if (hexToInt(&ptr, &addr))
-				regs->nip = addr;
-
-/* Need to flush the instruction cache here, as we may have deposited a
- * breakpoint, and the icache probably has no way of knowing that a data ref to
- * some location may have changed something that is in the instruction cache.
- */
-			kgdb_flush_cache_all();
-			mtmsr(msr);
-
-			kgdb_interruptible(1);
-			unlock_kernel();
-			kgdb_active = 0;
-			if (kdebug) {
-				printk("remcomInBuffer: %s\n", remcomInBuffer);
-				printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-			}
-			return 1;
-
-		case 's':
-			kgdb_flush_cache_all();
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
-			mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC);
-			regs->msr |= MSR_DE;
-#else
-			regs->msr |= MSR_SE;
-#endif
-			unlock_kernel();
-			kgdb_active = 0;
-			if (kdebug) {
-				printk("remcomInBuffer: %s\n", remcomInBuffer);
-				printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-			}
-			return 1;
-
-		case 'r':		/* Reset (if user process..exit ???)*/
-			panic("kgdb reset.");
-			break;
-		}			/* switch */
-		if (remcomOutBuffer[0] && kdebug) {
-			printk("remcomInBuffer: %s\n", remcomInBuffer);
-			printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-		}
-		/* reply to the request */
-		putpacket(remcomOutBuffer);
-	} /* while(1) */
-}
-
-/* This function will generate a breakpoint exception.  It is used at the
-   beginning of a program to sync up with a debugger and can be used
-   otherwise as a quick means to stop program execution and "break" into
-   the debugger. */
-
-void
-breakpoint(void)
-{
-	if (!initialized) {
-		printk("breakpoint() called b4 kgdb init\n");
-		return;
-	}
-
-	asm("	.globl breakinst	\n\
-	     breakinst: .long 0x7d821008");
-}
-
-#ifdef CONFIG_KGDB_CONSOLE
-/* Output string in GDB O-packet format if GDB has connected. If nothing
-   output, returns 0 (caller must then handle output). */
-int
-kgdb_output_string (const char* s, unsigned int count)
-{
-	char buffer[512];
-
-	if (!kgdb_started)
-		return 0;
-
-	count = (count <= (sizeof(buffer) / 2 - 2))
-		? count : (sizeof(buffer) / 2 - 2);
-
-	buffer[0] = 'O';
-	mem2hex (s, &buffer[1], count);
-	putpacket(buffer);
-
-	return 1;
-}
-#endif
-
-static void sysrq_handle_gdb(int key, struct pt_regs *pt_regs,
-			     struct tty_struct *tty)
-{
-	printk("Entering GDB stub\n");
-	breakpoint();
-}
-static struct sysrq_key_op sysrq_gdb_op = {
-        .handler        = sysrq_handle_gdb,
-        .help_msg       = "Gdb",
-        .action_msg     = "GDB",
-};
-
-static int gdb_register_sysrq(void)
-{
-	printk("Registering GDB sysrq handler\n");
-	register_sysrq_key('g', &sysrq_gdb_op);
-	return 0;
-}
-module_init(gdb_register_sysrq);