xmon.c 76.5 KB
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/*
 * Routines providing a simple monitor for use on the PowerMac.
 *
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 * Copyright (C) 1996-2005 Paul Mackerras.
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 * Copyright (C) 2001 PPC64 Team, IBM Corp
 * Copyrignt (C) 2006 Michael Ellerman, IBM Corp
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 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/sched/signal.h>
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#include <linux/smp.h>
#include <linux/mm.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/kallsyms.h>
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#include <linux/kmsg_dump.h>
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#include <linux/cpumask.h>
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#include <linux/export.h>
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#include <linux/sysrq.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/bug.h>
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#include <linux/nmi.h>
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#include <linux/ctype.h>
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#include <asm/ptrace.h>
#include <asm/string.h>
#include <asm/prom.h>
#include <asm/machdep.h>
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#include <asm/xmon.h>
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#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
#include <asm/mmu_context.h>
#include <asm/cputable.h>
#include <asm/rtas.h>
#include <asm/sstep.h>
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#include <asm/irq_regs.h>
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#include <asm/spu.h>
#include <asm/spu_priv1.h>
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#include <asm/setjmp.h>
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#include <asm/reg.h>
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#include <asm/debug.h>
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#include <asm/hw_breakpoint.h>
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#include <asm/opal.h>
#include <asm/firmware.h>

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#ifdef CONFIG_PPC64
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#include <asm/hvcall.h>
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#include <asm/paca.h>
#endif
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#if defined(CONFIG_PPC_SPLPAR)
#include <asm/plpar_wrappers.h>
#else
static inline long plapr_set_ciabr(unsigned long ciabr) {return 0; };
#endif

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#include "nonstdio.h"
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#include "dis-asm.h"
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#ifdef CONFIG_SMP
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static cpumask_t cpus_in_xmon = CPU_MASK_NONE;
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static unsigned long xmon_taken = 1;
static int xmon_owner;
static int xmon_gate;
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#else
#define xmon_owner 0
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#endif /* CONFIG_SMP */

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static unsigned long in_xmon __read_mostly = 0;
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static int xmon_on = IS_ENABLED(CONFIG_XMON_DEFAULT);
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static unsigned long adrs;
static int size = 1;
#define MAX_DUMP (128 * 1024)
static unsigned long ndump = 64;
static unsigned long nidump = 16;
static unsigned long ncsum = 4096;
static int termch;
static char tmpstr[128];

static long bus_error_jmp[JMP_BUF_LEN];
static int catch_memory_errors;
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static int catch_spr_faults;
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static long *xmon_fault_jmp[NR_CPUS];

/* Breakpoint stuff */
struct bpt {
	unsigned long	address;
	unsigned int	instr[2];
	atomic_t	ref_count;
	int		enabled;
	unsigned long	pad;
};

/* Bits in bpt.enabled */
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#define BP_CIABR	1
#define BP_TRAP		2
#define BP_DABR		4
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#define NBPTS	256
static struct bpt bpts[NBPTS];
static struct bpt dabr;
static struct bpt *iabr;
static unsigned bpinstr = 0x7fe00008;	/* trap */

#define BP_NUM(bp)	((bp) - bpts + 1)

/* Prototypes */
static int cmds(struct pt_regs *);
static int mread(unsigned long, void *, int);
static int mwrite(unsigned long, void *, int);
static int handle_fault(struct pt_regs *);
static void byterev(unsigned char *, int);
static void memex(void);
static int bsesc(void);
static void dump(void);
static void prdump(unsigned long, long);
static int ppc_inst_dump(unsigned long, long, int);
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static void dump_log_buf(void);
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#ifdef CONFIG_PPC_POWERNV
static void dump_opal_msglog(void);
#else
static inline void dump_opal_msglog(void)
{
	printf("Machine is not running OPAL firmware.\n");
}
#endif

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static void backtrace(struct pt_regs *);
static void excprint(struct pt_regs *);
static void prregs(struct pt_regs *);
static void memops(int);
static void memlocate(void);
static void memzcan(void);
static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned);
int skipbl(void);
int scanhex(unsigned long *valp);
static void scannl(void);
static int hexdigit(int);
void getstring(char *, int);
static void flush_input(void);
static int inchar(void);
static void take_input(char *);
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static int  read_spr(int, unsigned long *);
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static void write_spr(int, unsigned long);
static void super_regs(void);
static void remove_bpts(void);
static void insert_bpts(void);
static void remove_cpu_bpts(void);
static void insert_cpu_bpts(void);
static struct bpt *at_breakpoint(unsigned long pc);
static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp);
static int  do_step(struct pt_regs *);
static void bpt_cmds(void);
static void cacheflush(void);
static int  cpu_cmd(void);
static void csum(void);
static void bootcmds(void);
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static void proccall(void);
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static void show_tasks(void);
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void dump_segments(void);
static void symbol_lookup(void);
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static void xmon_show_stack(unsigned long sp, unsigned long lr,
			    unsigned long pc);
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static void xmon_print_symbol(unsigned long address, const char *mid,
			      const char *after);
static const char *getvecname(unsigned long vec);

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static int do_spu_cmd(void);

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#ifdef CONFIG_44x
static void dump_tlb_44x(void);
#endif
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#ifdef CONFIG_PPC_BOOK3E
static void dump_tlb_book3e(void);
#endif
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static int xmon_no_auto_backtrace;
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#ifdef CONFIG_PPC64
#define REG		"%.16lx"
#else
#define REG		"%.8lx"
#endif
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#ifdef __LITTLE_ENDIAN__
#define GETWORD(v)	(((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0])
#else
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#define GETWORD(v)	(((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3])
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#endif
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static char *help_string = "\
Commands:\n\
  b	show breakpoints\n\
  bd	set data breakpoint\n\
  bi	set instruction breakpoint\n\
  bc	clear breakpoint\n"
#ifdef CONFIG_SMP
  "\
  c	print cpus stopped in xmon\n\
  c#	try to switch to cpu number h (in hex)\n"
#endif
  "\
  C	checksum\n\
  d	dump bytes\n\
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  d1	dump 1 byte values\n\
  d2	dump 2 byte values\n\
  d4	dump 4 byte values\n\
  d8	dump 8 byte values\n\
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  di	dump instructions\n\
  df	dump float values\n\
  dd	dump double values\n\
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  dl    dump the kernel log buffer\n"
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#ifdef CONFIG_PPC_POWERNV
  "\
  do    dump the OPAL message log\n"
#endif
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#ifdef CONFIG_PPC64
  "\
  dp[#]	dump paca for current cpu, or cpu #\n\
  dpa	dump paca for all possible cpus\n"
#endif
  "\
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  dr	dump stream of raw bytes\n\
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  dt	dump the tracing buffers (uses printk)\n\
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  e	print exception information\n\
  f	flush cache\n\
  la	lookup symbol+offset of specified address\n\
  ls	lookup address of specified symbol\n\
  m	examine/change memory\n\
  mm	move a block of memory\n\
  ms	set a block of memory\n\
  md	compare two blocks of memory\n\
  ml	locate a block of memory\n\
  mz	zero a block of memory\n\
  mi	show information about memory allocation\n\
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  p 	call a procedure\n\
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  P 	list processes/tasks\n\
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  r	print registers\n\
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  s	single step\n"
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#ifdef CONFIG_SPU_BASE
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"  ss	stop execution on all spus\n\
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  sr	restore execution on stopped spus\n\
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  sf  #	dump spu fields for spu # (in hex)\n\
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  sd  #	dump spu local store for spu # (in hex)\n\
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  sdi #	disassemble spu local store for spu # (in hex)\n"
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#endif
"  S	print special registers\n\
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  Sa    print all SPRs\n\
  Sr #	read SPR #\n\
  Sw #v write v to SPR #\n\
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  t	print backtrace\n\
  x	exit monitor and recover\n\
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  X	exit monitor and don't recover\n"
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#if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E)
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"  u	dump segment table or SLB\n"
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#elif defined(CONFIG_PPC_STD_MMU_32)
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"  u	dump segment registers\n"
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#elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E)
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"  u	dump TLB\n"
#endif
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"  ?	help\n"
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"  # n	limit output to n lines per page (for dp, dpa, dl)\n"
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"  zr	reboot\n\
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  zh	halt\n"
;

static struct pt_regs *xmon_regs;

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static inline void sync(void)
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{
	asm volatile("sync; isync");
}

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static inline void store_inst(void *p)
{
	asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p));
}

static inline void cflush(void *p)
{
	asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p));
}

static inline void cinval(void *p)
{
	asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p));
}
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/**
 * write_ciabr() - write the CIABR SPR
 * @ciabr:	The value to write.
 *
 * This function writes a value to the CIARB register either directly
 * through mtspr instruction if the kernel is in HV privilege mode or
 * call a hypervisor function to achieve the same in case the kernel
 * is in supervisor privilege mode.
 */
static void write_ciabr(unsigned long ciabr)
{
	if (!cpu_has_feature(CPU_FTR_ARCH_207S))
		return;

	if (cpu_has_feature(CPU_FTR_HVMODE)) {
		mtspr(SPRN_CIABR, ciabr);
		return;
	}
	plapr_set_ciabr(ciabr);
}

/**
 * set_ciabr() - set the CIABR
 * @addr:	The value to set.
 *
 * This function sets the correct privilege value into the the HW
 * breakpoint address before writing it up in the CIABR register.
 */
static void set_ciabr(unsigned long addr)
{
	addr &= ~CIABR_PRIV;

	if (cpu_has_feature(CPU_FTR_HVMODE))
		addr |= CIABR_PRIV_HYPER;
	else
		addr |= CIABR_PRIV_SUPER;
	write_ciabr(addr);
}

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/*
 * Disable surveillance (the service processor watchdog function)
 * while we are in xmon.
 * XXX we should re-enable it when we leave. :)
 */
#define SURVEILLANCE_TOKEN	9000

static inline void disable_surveillance(void)
{
#ifdef CONFIG_PPC_PSERIES
	/* Since this can't be a module, args should end up below 4GB. */
	static struct rtas_args args;
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	int token;
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	/*
	 * At this point we have got all the cpus we can into
	 * xmon, so there is hopefully no other cpu calling RTAS
	 * at the moment, even though we don't take rtas.lock.
	 * If we did try to take rtas.lock there would be a
	 * real possibility of deadlock.
	 */
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	token = rtas_token("set-indicator");
	if (token == RTAS_UNKNOWN_SERVICE)
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		return;
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	rtas_call_unlocked(&args, token, 3, 1, NULL, SURVEILLANCE_TOKEN, 0, 0);

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#endif /* CONFIG_PPC_PSERIES */
}

#ifdef CONFIG_SMP
static int xmon_speaker;

static void get_output_lock(void)
{
	int me = smp_processor_id() + 0x100;
	int last_speaker = 0, prev;
	long timeout;

	if (xmon_speaker == me)
		return;
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	for (;;) {
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		last_speaker = cmpxchg(&xmon_speaker, 0, me);
		if (last_speaker == 0)
			return;

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		/*
		 * Wait a full second for the lock, we might be on a slow
		 * console, but check every 100us.
		 */
		timeout = 10000;
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		while (xmon_speaker == last_speaker) {
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			if (--timeout > 0) {
				udelay(100);
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				continue;
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			}

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			/* hostile takeover */
			prev = cmpxchg(&xmon_speaker, last_speaker, me);
			if (prev == last_speaker)
				return;
			break;
		}
	}
}

static void release_output_lock(void)
{
	xmon_speaker = 0;
}
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int cpus_are_in_xmon(void)
{
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	return !cpumask_empty(&cpus_in_xmon);
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}
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#endif

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static inline int unrecoverable_excp(struct pt_regs *regs)
{
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#if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E)
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	/* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */
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	return 0;
#else
	return ((regs->msr & MSR_RI) == 0);
#endif
}

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static int xmon_core(struct pt_regs *regs, int fromipi)
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{
	int cmd = 0;
	struct bpt *bp;
	long recurse_jmp[JMP_BUF_LEN];
	unsigned long offset;
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	unsigned long flags;
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#ifdef CONFIG_SMP
	int cpu;
	int secondary;
	unsigned long timeout;
#endif

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	local_irq_save(flags);
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	hard_irq_disable();
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	bp = in_breakpoint_table(regs->nip, &offset);
	if (bp != NULL) {
		regs->nip = bp->address + offset;
		atomic_dec(&bp->ref_count);
	}

	remove_cpu_bpts();

#ifdef CONFIG_SMP
	cpu = smp_processor_id();
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	if (cpumask_test_cpu(cpu, &cpus_in_xmon)) {
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		/*
		 * We catch SPR read/write faults here because the 0x700, 0xf60
		 * etc. handlers don't call debugger_fault_handler().
		 */
		if (catch_spr_faults)
			longjmp(bus_error_jmp, 1);
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		get_output_lock();
		excprint(regs);
		printf("cpu 0x%x: Exception %lx %s in xmon, "
		       "returning to main loop\n",
		       cpu, regs->trap, getvecname(TRAP(regs)));
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		release_output_lock();
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		longjmp(xmon_fault_jmp[cpu], 1);
	}

	if (setjmp(recurse_jmp) != 0) {
		if (!in_xmon || !xmon_gate) {
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			get_output_lock();
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			printf("xmon: WARNING: bad recursive fault "
			       "on cpu 0x%x\n", cpu);
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			release_output_lock();
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			goto waiting;
		}
		secondary = !(xmon_taken && cpu == xmon_owner);
		goto cmdloop;
	}

	xmon_fault_jmp[cpu] = recurse_jmp;

	bp = NULL;
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	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT))
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		bp = at_breakpoint(regs->nip);
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	if (bp || unrecoverable_excp(regs))
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		fromipi = 0;

	if (!fromipi) {
		get_output_lock();
		excprint(regs);
		if (bp) {
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			printf("cpu 0x%x stopped at breakpoint 0x%lx (",
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			       cpu, BP_NUM(bp));
			xmon_print_symbol(regs->nip, " ", ")\n");
		}
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		if (unrecoverable_excp(regs))
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			printf("WARNING: exception is not recoverable, "
			       "can't continue\n");
		release_output_lock();
	}

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	cpumask_set_cpu(cpu, &cpus_in_xmon);

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 waiting:
	secondary = 1;
	while (secondary && !xmon_gate) {
		if (in_xmon == 0) {
			if (fromipi)
				goto leave;
			secondary = test_and_set_bit(0, &in_xmon);
		}
		barrier();
	}

	if (!secondary && !xmon_gate) {
		/* we are the first cpu to come in */
		/* interrupt other cpu(s) */
		int ncpus = num_online_cpus();

		xmon_owner = cpu;
		mb();
		if (ncpus > 1) {
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			smp_send_debugger_break();
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			/* wait for other cpus to come in */
			for (timeout = 100000000; timeout != 0; --timeout) {
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				if (cpumask_weight(&cpus_in_xmon) >= ncpus)
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					break;
				barrier();
			}
		}
		remove_bpts();
		disable_surveillance();
		/* for breakpoint or single step, print the current instr. */
		if (bp || TRAP(regs) == 0xd00)
			ppc_inst_dump(regs->nip, 1, 0);
		printf("enter ? for help\n");
		mb();
		xmon_gate = 1;
		barrier();
	}

 cmdloop:
	while (in_xmon) {
		if (secondary) {
			if (cpu == xmon_owner) {
				if (!test_and_set_bit(0, &xmon_taken)) {
					secondary = 0;
					continue;
				}
				/* missed it */
				while (cpu == xmon_owner)
					barrier();
			}
			barrier();
		} else {
			cmd = cmds(regs);
			if (cmd != 0) {
				/* exiting xmon */
				insert_bpts();
				xmon_gate = 0;
				wmb();
				in_xmon = 0;
				break;
			}
			/* have switched to some other cpu */
			secondary = 1;
		}
	}
 leave:
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	cpumask_clear_cpu(cpu, &cpus_in_xmon);
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	xmon_fault_jmp[cpu] = NULL;
#else
	/* UP is simple... */
	if (in_xmon) {
		printf("Exception %lx %s in xmon, returning to main loop\n",
		       regs->trap, getvecname(TRAP(regs)));
		longjmp(xmon_fault_jmp[0], 1);
	}
	if (setjmp(recurse_jmp) == 0) {
		xmon_fault_jmp[0] = recurse_jmp;
		in_xmon = 1;

		excprint(regs);
		bp = at_breakpoint(regs->nip);
		if (bp) {
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			printf("Stopped at breakpoint %lx (", BP_NUM(bp));
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			xmon_print_symbol(regs->nip, " ", ")\n");
		}
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		if (unrecoverable_excp(regs))
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			printf("WARNING: exception is not recoverable, "
			       "can't continue\n");
		remove_bpts();
		disable_surveillance();
		/* for breakpoint or single step, print the current instr. */
		if (bp || TRAP(regs) == 0xd00)
			ppc_inst_dump(regs->nip, 1, 0);
		printf("enter ? for help\n");
	}

	cmd = cmds(regs);

	insert_bpts();
	in_xmon = 0;
#endif

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#ifdef CONFIG_BOOKE
	if (regs->msr & MSR_DE) {
		bp = at_breakpoint(regs->nip);
		if (bp != NULL) {
			regs->nip = (unsigned long) &bp->instr[0];
			atomic_inc(&bp->ref_count);
		}
	}
#else
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	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) {
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		bp = at_breakpoint(regs->nip);
		if (bp != NULL) {
			int stepped = emulate_step(regs, bp->instr[0]);
			if (stepped == 0) {
				regs->nip = (unsigned long) &bp->instr[0];
				atomic_inc(&bp->ref_count);
			} else if (stepped < 0) {
				printf("Couldn't single-step %s instruction\n",
				    (IS_RFID(bp->instr[0])? "rfid": "mtmsrd"));
			}
		}
	}
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#endif
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	insert_cpu_bpts();

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	touch_nmi_watchdog();
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	local_irq_restore(flags);
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	return cmd != 'X' && cmd != EOF;
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}

int xmon(struct pt_regs *excp)
{
	struct pt_regs regs;

	if (excp == NULL) {
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		ppc_save_regs(&regs);
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		excp = &regs;
	}
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	return xmon_core(excp, 0);
}
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EXPORT_SYMBOL(xmon);

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irqreturn_t xmon_irq(int irq, void *d)
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{
	unsigned long flags;
	local_irq_save(flags);
	printf("Keyboard interrupt\n");
656
	xmon(get_irq_regs());
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	local_irq_restore(flags);
	return IRQ_HANDLED;
}
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static int xmon_bpt(struct pt_regs *regs)
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{
	struct bpt *bp;
	unsigned long offset;

666
	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
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		return 0;

	/* Are we at the trap at bp->instr[1] for some bp? */
	bp = in_breakpoint_table(regs->nip, &offset);
	if (bp != NULL && offset == 4) {
		regs->nip = bp->address + 4;
		atomic_dec(&bp->ref_count);
		return 1;
	}

	/* Are we at a breakpoint? */
	bp = at_breakpoint(regs->nip);
	if (!bp)
		return 0;

	xmon_core(regs, 0);

	return 1;
}

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static int xmon_sstep(struct pt_regs *regs)
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{
	if (user_mode(regs))
		return 0;
	xmon_core(regs, 0);
	return 1;
}

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static int xmon_break_match(struct pt_regs *regs)
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{
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	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
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		return 0;
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	if (dabr.enabled == 0)
		return 0;
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	xmon_core(regs, 0);
	return 1;
}

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static int xmon_iabr_match(struct pt_regs *regs)
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{
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	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
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		return 0;
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	if (iabr == NULL)
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		return 0;
	xmon_core(regs, 0);
	return 1;
}

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static int xmon_ipi(struct pt_regs *regs)
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{
#ifdef CONFIG_SMP
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	if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon))
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		xmon_core(regs, 1);
#endif
	return 0;
}

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static int xmon_fault_handler(struct pt_regs *regs)
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{
	struct bpt *bp;
	unsigned long offset;

	if (in_xmon && catch_memory_errors)
		handle_fault(regs);	/* doesn't return */

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	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) {
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		bp = in_breakpoint_table(regs->nip, &offset);
		if (bp != NULL) {
			regs->nip = bp->address + offset;
			atomic_dec(&bp->ref_count);
		}
	}

	return 0;
}

static struct bpt *at_breakpoint(unsigned long pc)
{
	int i;
	struct bpt *bp;

	bp = bpts;
	for (i = 0; i < NBPTS; ++i, ++bp)
		if (bp->enabled && pc == bp->address)
			return bp;
	return NULL;
}

static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp)
{
	unsigned long off;

	off = nip - (unsigned long) bpts;
	if (off >= sizeof(bpts))
		return NULL;
	off %= sizeof(struct bpt);
	if (off != offsetof(struct bpt, instr[0])
	    && off != offsetof(struct bpt, instr[1]))
		return NULL;
	*offp = off - offsetof(struct bpt, instr[0]);
	return (struct bpt *) (nip - off);
}

static struct bpt *new_breakpoint(unsigned long a)
{
	struct bpt *bp;

	a &= ~3UL;
	bp = at_breakpoint(a);
	if (bp)
		return bp;

	for (bp = bpts; bp < &bpts[NBPTS]; ++bp) {
		if (!bp->enabled && atomic_read(&bp->ref_count) == 0) {
			bp->address = a;
			bp->instr[1] = bpinstr;
			store_inst(&bp->instr[1]);
			return bp;
		}
	}

	printf("Sorry, no free breakpoints.  Please clear one first.\n");
	return NULL;
}

static void insert_bpts(void)
{
	int i;
	struct bpt *bp;

	bp = bpts;
	for (i = 0; i < NBPTS; ++i, ++bp) {
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		if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0)
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			continue;
		if (mread(bp->address, &bp->instr[0], 4) != 4) {
			printf("Couldn't read instruction at %lx, "
			       "disabling breakpoint there\n", bp->address);
			bp->enabled = 0;
			continue;
		}
		if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) {
			printf("Breakpoint at %lx is on an mtmsrd or rfid "
			       "instruction, disabling it\n", bp->address);
			bp->enabled = 0;
			continue;
		}
		store_inst(&bp->instr[0]);
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		if (bp->enabled & BP_CIABR)
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			continue;
		if (mwrite(bp->address, &bpinstr, 4) != 4) {
			printf("Couldn't write instruction at %lx, "
			       "disabling breakpoint there\n", bp->address);
			bp->enabled &= ~BP_TRAP;
			continue;
		}
		store_inst((void *)bp->address);
	}
}

static void insert_cpu_bpts(void)
{
828 829 830 831 832 833
	struct arch_hw_breakpoint brk;

	if (dabr.enabled) {
		brk.address = dabr.address;
		brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL;
		brk.len = 8;
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		__set_breakpoint(&brk);
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	}
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	if (iabr)
		set_ciabr(iabr->address);
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}

static void remove_bpts(void)
{
	int i;
	struct bpt *bp;
	unsigned instr;

	bp = bpts;
	for (i = 0; i < NBPTS; ++i, ++bp) {
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		if ((bp->enabled & (BP_TRAP|BP_CIABR)) != BP_TRAP)
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			continue;
		if (mread(bp->address, &instr, 4) == 4
		    && instr == bpinstr
		    && mwrite(bp->address, &bp->instr, 4) != 4)
			printf("Couldn't remove breakpoint at %lx\n",
			       bp->address);
		else
			store_inst((void *)bp->address);
	}
}

static void remove_cpu_bpts(void)
{
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	hw_breakpoint_disable();
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	write_ciabr(0);
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}

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static void set_lpp_cmd(void)
{
	unsigned long lpp;

	if (!scanhex(&lpp)) {
		printf("Invalid number.\n");
		lpp = 0;
	}
	xmon_set_pagination_lpp(lpp);
}
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/* Command interpreting routine */
static char *last_cmd;

static int
cmds(struct pt_regs *excp)
{
	int cmd = 0;

	last_cmd = NULL;
	xmon_regs = excp;
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	if (!xmon_no_auto_backtrace) {
		xmon_no_auto_backtrace = 1;
		xmon_show_stack(excp->gpr[1], excp->link, excp->nip);
	}

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	for(;;) {
#ifdef CONFIG_SMP
		printf("%x:", smp_processor_id());
#endif /* CONFIG_SMP */
		printf("mon> ");
		flush_input();
		termch = 0;
		cmd = skipbl();
		if( cmd == '\n' ) {
			if (last_cmd == NULL)
				continue;
			take_input(last_cmd);
			last_cmd = NULL;
			cmd = inchar();
		}
		switch (cmd) {
		case 'm':
			cmd = inchar();
			switch (cmd) {
			case 'm':
			case 's':
			case 'd':
				memops(cmd);
				break;
			case 'l':
				memlocate();
				break;
			case 'z':
				memzcan();
				break;
			case 'i':
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				show_mem(0, NULL);
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				break;
			default:
				termch = cmd;
				memex();
			}
			break;
		case 'd':
			dump();
			break;
		case 'l':
			symbol_lookup();
			break;
		case 'r':
			prregs(excp);	/* print regs */
			break;
		case 'e':
			excprint(excp);
			break;
		case 'S':
			super_regs();
			break;
		case 't':
			backtrace(excp);
			break;
		case 'f':
			cacheflush();
			break;
		case 's':
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			if (do_spu_cmd() == 0)
				break;
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			if (do_step(excp))
				return cmd;
			break;
		case 'x':
		case 'X':
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			return cmd;
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		case EOF:
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			printf(" <no input ...>\n");
			mdelay(2000);
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			return cmd;
		case '?':
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			xmon_puts(help_string);
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			break;
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		case '#':
			set_lpp_cmd();
			break;
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		case 'b':
			bpt_cmds();
			break;
		case 'C':
			csum();
			break;
		case 'c':
			if (cpu_cmd())
				return 0;
			break;
		case 'z':
			bootcmds();
			break;
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		case 'p':
			proccall();
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			break;
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		case 'P':
			show_tasks();
			break;
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#ifdef CONFIG_PPC_STD_MMU
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		case 'u':
			dump_segments();
			break;
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#elif defined(CONFIG_44x)
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		case 'u':
			dump_tlb_44x();
			break;
998
#elif defined(CONFIG_PPC_BOOK3E)
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		case 'u':
			dump_tlb_book3e();
			break;
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#endif
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		default:
			printf("Unrecognized command: ");
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			do {
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				if (' ' < cmd && cmd <= '~')
					putchar(cmd);
				else
					printf("\\x%x", cmd);
				cmd = inchar();
1011
			} while (cmd != '\n');
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			printf(" (type ? for help)\n");
			break;
		}
	}
}

1018 1019 1020 1021 1022 1023 1024 1025
#ifdef CONFIG_BOOKE
static int do_step(struct pt_regs *regs)
{
	regs->msr |= MSR_DE;
	mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
	return 1;
}
#else
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/*
 * Step a single instruction.
 * Some instructions we emulate, others we execute with MSR_SE set.
 */
static int do_step(struct pt_regs *regs)
{
	unsigned int instr;
	int stepped;

	/* check we are in 64-bit kernel mode, translation enabled */
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	if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) {
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		if (mread(regs->nip, &instr, 4) == 4) {
			stepped = emulate_step(regs, instr);
			if (stepped < 0) {
				printf("Couldn't single-step %s instruction\n",
				       (IS_RFID(instr)? "rfid": "mtmsrd"));
				return 0;
			}
			if (stepped > 0) {
				regs->trap = 0xd00 | (regs->trap & 1);
				printf("stepped to ");
				xmon_print_symbol(regs->nip, " ", "\n");
				ppc_inst_dump(regs->nip, 1, 0);
				return 0;
			}
		}
	}
	regs->msr |= MSR_SE;
	return 1;
}
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#endif
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static void bootcmds(void)
{
	int cmd;

	cmd = inchar();
	if (cmd == 'r')
		ppc_md.restart(NULL);
	else if (cmd == 'h')
		ppc_md.halt();
	else if (cmd == 'p')
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		if (pm_power_off)
			pm_power_off();
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}

static int cpu_cmd(void)
{
#ifdef CONFIG_SMP
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	unsigned long cpu, first_cpu, last_cpu;
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	int timeout;

	if (!scanhex(&cpu)) {
		/* print cpus waiting or in xmon */
		printf("cpus stopped:");
1081
		last_cpu = first_cpu = NR_CPUS;
1082
		for_each_possible_cpu(cpu) {
1083
			if (cpumask_test_cpu(cpu, &cpus_in_xmon)) {
1084 1085 1086 1087
				if (cpu == last_cpu + 1) {
					last_cpu = cpu;
				} else {
					if (last_cpu != first_cpu)
1088
						printf("-0x%lx", last_cpu);
1089
					last_cpu = first_cpu = cpu;
1090
					printf(" 0x%lx", cpu);
1091
				}
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			}
		}
1094
		if (last_cpu != first_cpu)
1095
			printf("-0x%lx", last_cpu);
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		printf("\n");
		return 0;
	}
	/* try to switch to cpu specified */
1100
	if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) {
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		printf("cpu 0x%x isn't in xmon\n", cpu);
		return 0;
	}
	xmon_taken = 0;
	mb();
	xmon_owner = cpu;
	timeout = 10000000;
	while (!xmon_taken) {
		if (--timeout == 0) {
			if (test_and_set_bit(0, &xmon_taken))
				break;
			/* take control back */
			mb();
			xmon_owner = smp_processor_id();
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			printf("cpu 0x%x didn't take control\n", cpu);
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			return 0;
		}
		barrier();
	}
	return 1;
#else
	return 0;
#endif /* CONFIG_SMP */
}

static unsigned short fcstab[256] = {
	0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
	0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
	0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
	0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
	0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
	0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
	0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
	0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
	0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
	0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
	0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
	0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
	0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
	0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
	0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
	0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
	0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
	0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
	0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
	0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
	0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
	0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
	0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
	0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
	0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
	0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
	0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
	0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
	0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
	0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
	0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
	0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};

#define FCS(fcs, c)	(((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])

static void
csum(void)
{
	unsigned int i;
	unsigned short fcs;
	unsigned char v;

	if (!scanhex(&adrs))
		return;
	if (!scanhex(&ncsum))
		return;
	fcs = 0xffff;
	for (i = 0; i < ncsum; ++i) {
		if (mread(adrs+i, &v, 1) == 0) {
1177
			printf("csum stopped at "REG"\n", adrs+i);
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			break;
		}
		fcs = FCS(fcs, v);
	}
	printf("%x\n", fcs);
}

/*
 * Check if this is a suitable place to put a breakpoint.
 */
static long check_bp_loc(unsigned long addr)
{
	unsigned int instr;

	addr &= ~3;
1193
	if (!is_kernel_addr(addr)) {
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		printf("Breakpoints may only be placed at kernel addresses\n");
		return 0;
	}
	if (!mread(addr, &instr, sizeof(instr))) {
		printf("Can't read instruction at address %lx\n", addr);
		return 0;
	}
	if (IS_MTMSRD(instr) || IS_RFID(instr)) {
		printf("Breakpoints may not be placed on mtmsrd or rfid "
		       "instructions\n");
		return 0;
	}
	return 1;
}

1209
static char *breakpoint_help_string =
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    "Breakpoint command usage:\n"
    "b                show breakpoints\n"
    "b <addr> [cnt]   set breakpoint at given instr addr\n"
    "bc               clear all breakpoints\n"
    "bc <n/addr>      clear breakpoint number n or at addr\n"
1215
    "bi <addr> [cnt]  set hardware instr breakpoint (POWER8 only)\n"
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    "bd <addr> [cnt]  set hardware data breakpoint\n"
    "";

static void
bpt_cmds(void)
{
	int cmd;
	unsigned long a;
	int mode, i;
	struct bpt *bp;
	const char badaddr[] = "Only kernel addresses are permitted "
		"for breakpoints\n";

	cmd = inchar();
	switch (cmd) {
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#ifndef CONFIG_8xx
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	case 'd':	/* bd - hardware data breakpoint */
		mode = 7;
		cmd = inchar();
		if (cmd == 'r')
			mode = 5;
		else if (cmd == 'w')
			mode = 6;
		else
			termch = cmd;
		dabr.address = 0;
		dabr.enabled = 0;
		if (scanhex(&dabr.address)) {
1244
			if (!is_kernel_addr(dabr.address)) {
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				printf(badaddr);
				break;
			}
1248
			dabr.address &= ~HW_BRK_TYPE_DABR;
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			dabr.enabled = mode | BP_DABR;
		}
		break;

	case 'i':	/* bi - hardware instr breakpoint */
1254
		if (!cpu_has_feature(CPU_FTR_ARCH_207S)) {
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			printf("Hardware instruction breakpoint "
			       "not supported on this cpu\n");
			break;
		}
		if (iabr) {
1260
			iabr->enabled &= ~BP_CIABR;
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			iabr = NULL;
		}
		if (!scanhex(&a))
			break;
		if (!check_bp_loc(a))
			break;
		bp = new_breakpoint(a);
		if (bp != NULL) {
1269
			bp->enabled |= BP_CIABR;
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			iabr = bp;
		}
		break;
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#endif
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	case 'c':
		if (!scanhex(&a)) {
			/* clear all breakpoints */
			for (i = 0; i < NBPTS; ++i)
				bpts[i].enabled = 0;
			iabr = NULL;
			dabr.enabled = 0;
			printf("All breakpoints cleared\n");
			break;
		}

		if (a <= NBPTS && a >= 1) {
			/* assume a breakpoint number */
			bp = &bpts[a-1];	/* bp nums are 1 based */
		} else {
			/* assume a breakpoint address */
			bp = at_breakpoint(a);
1292
			if (bp == NULL) {
1293
				printf("No breakpoint at %lx\n", a);
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				break;
			}
		}

1298
		printf("Cleared breakpoint %lx (", BP_NUM(bp));
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		xmon_print_symbol(bp->address, " ", ")\n");
		bp->enabled = 0;
		break;

	default:
		termch = cmd;
1305
		cmd = skipbl();
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		if (cmd == '?') {
			printf(breakpoint_help_string);
			break;
		}
		termch = cmd;
		if (!scanhex(&a)) {
			/* print all breakpoints */
			printf("   type            address\n");
			if (dabr.enabled) {
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				printf("   data   "REG"  [", dabr.address);
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				if (dabr.enabled & 1)
					printf("r");
				if (dabr.enabled & 2)
					printf("w");
				printf("]\n");
			}
			for (bp = bpts; bp < &bpts[NBPTS]; ++bp) {
				if (!bp->enabled)
					continue;
				printf("%2x %s   ", BP_NUM(bp),
1326
				    (bp->enabled & BP_CIABR) ? "inst": "trap");
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				xmon_print_symbol(bp->address, "  ", "\n");
			}
			break;
		}

		if (!check_bp_loc(a))
			break;
		bp = new_breakpoint(a);
		if (bp != NULL)
			bp->enabled |= BP_TRAP;
		break;
	}
}

/* Very cheap human name for vector lookup. */
static
const char *getvecname(unsigned long vec)
{
	char *ret;

	switch (vec) {
	case 0x100:	ret = "(System Reset)"; break;
	case 0x200:	ret = "(Machine Check)"; break;
	case 0x300:	ret = "(Data Access)"; break;
	case 0x380:	ret = "(Data SLB Access)"; break;
	case 0x400:	ret = "(Instruction Access)"; break;
	case 0x480:	ret = "(Instruction SLB Access)"; break;
	case 0x500:	ret = "(Hardware Interrupt)"; break;
	case 0x600:	ret = "(Alignment)"; break;
	case 0x700:	ret = "(Program Check)"; break;
	case 0x800:	ret = "(FPU Unavailable)"; break;
	case 0x900:	ret = "(Decrementer)"; break;
1359 1360
	case 0x980:	ret = "(Hypervisor Decrementer)"; break;
	case 0xa00:	ret = "(Doorbell)"; break;
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	case 0xc00:	ret = "(System Call)"; break;
	case 0xd00:	ret = "(Single Step)"; break;
1363 1364 1365
	case 0xe40:	ret = "(Emulation Assist)"; break;
	case 0xe60:	ret = "(HMI)"; break;
	case 0xe80:	ret = "(Hypervisor Doorbell)"; break;
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	case 0xf00:	ret = "(Performance Monitor)"; break;
	case 0xf20:	ret = "(Altivec Unavailable)"; break;
	case 0x1300:	ret = "(Instruction Breakpoint)"; break;
1369 1370
	case 0x1500:	ret = "(Denormalisation)"; break;
	case 0x1700:	ret = "(Altivec Assist)"; break;
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	default: ret = "";
	}
	return ret;
}

static void get_function_bounds(unsigned long pc, unsigned long *startp,
				unsigned long *endp)
{
	unsigned long size, offset;
	const char *name;

	*startp = *endp = 0;
	if (pc == 0)
		return;
	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();
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		name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr);
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		if (name != NULL) {
			*startp = pc - offset;
			*endp = pc - offset + size;
		}
		sync();
	}
	catch_memory_errors = 0;
}

1398 1399 1400
#define LRSAVE_OFFSET		(STACK_FRAME_LR_SAVE * sizeof(unsigned long))
#define MARKER_OFFSET		(STACK_FRAME_MARKER * sizeof(unsigned long))

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static void xmon_show_stack(unsigned long sp, unsigned long lr,
			    unsigned long pc)
{
1404
	int max_to_print = 64;
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	unsigned long ip;
	unsigned long newsp;
	unsigned long marker;
	struct pt_regs regs;

1410
	while (max_to_print--) {
1411
		if (!is_kernel_addr(sp)) {
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			if (sp != 0)
				printf("SP (%lx) is in userspace\n", sp);
			break;
		}

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		if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long))
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		    || !mread(sp, &newsp, sizeof(unsigned long))) {
			printf("Couldn't read stack frame at %lx\n", sp);
			break;
		}

		/*
		 * For the first stack frame, try to work out if
		 * LR and/or the saved LR value in the bottommost
		 * stack frame are valid.
		 */
		if ((pc | lr) != 0) {
			unsigned long fnstart, fnend;
			unsigned long nextip;
			int printip = 1;

			get_function_bounds(pc, &fnstart, &fnend);
			nextip = 0;
			if (newsp > sp)
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				mread(newsp + LRSAVE_OFFSET, &nextip,
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				      sizeof(unsigned long));
			if (lr == ip) {
1439
				if (!is_kernel_addr(lr)
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				    || (fnstart <= lr && lr < fnend))
					printip = 0;
			} else if (lr == nextip) {
				printip = 0;
1444
			} else if (is_kernel_addr(lr)
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				   && !(fnstart <= lr && lr < fnend)) {
				printf("[link register   ] ");
				xmon_print_symbol(lr, " ", "\n");
			}
			if (printip) {
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				printf("["REG"] ", sp);
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				xmon_print_symbol(ip, " ", " (unreliable)\n");
			}
			pc = lr = 0;

		} else {
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			printf("["REG"] ", sp);
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			xmon_print_symbol(ip, " ", "\n");
		}

		/* Look for "regshere" marker to see if this is
		   an exception frame. */
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		if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
1463
		    && marker == STACK_FRAME_REGS_MARKER) {
1464
			if (mread(sp + STACK_FRAME_OVERHEAD, &regs, sizeof(regs))
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			    != sizeof(regs)) {
				printf("Couldn't read registers at %lx\n",
1467
				       sp + STACK_FRAME_OVERHEAD);
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				break;
			}
1470
			printf("--- Exception: %lx %s at ", regs.trap,
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			       getvecname(TRAP(&regs)));
			pc = regs.nip;
			lr = regs.link;
			xmon_print_symbol(pc, " ", "\n");
		}

		if (newsp == 0)
			break;

		sp = newsp;
1481
	}
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}

static void backtrace(struct pt_regs *excp)
{
	unsigned long sp;

	if (scanhex(&sp))
		xmon_show_stack(sp, 0, 0);
	else
		xmon_show_stack(excp->gpr[1], excp->link, excp->nip);
	scannl();
}

static void print_bug_trap(struct pt_regs *regs)
{
1497
#ifdef CONFIG_BUG
1498
	const struct bug_entry *bug;
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	unsigned long addr;

	if (regs->msr & MSR_PR)
		return;		/* not in kernel */
	addr = regs->nip;	/* address of trap instruction */
1504
	if (!is_kernel_addr(addr))
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		return;
	bug = find_bug(regs->nip);
	if (bug == NULL)
		return;
1509
	if (is_warning_bug(bug))
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		return;

1512
#ifdef CONFIG_DEBUG_BUGVERBOSE
1513 1514
	printf("kernel BUG at %s:%u!\n",
	       bug->file, bug->line);
1515 1516 1517
#else
	printf("kernel BUG at %p!\n", (void *)bug->bug_addr);
#endif
1518
#endif /* CONFIG_BUG */
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}

1521
static void excprint(struct pt_regs *fp)
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{
	unsigned long trap;

#ifdef CONFIG_SMP
	printf("cpu 0x%x: ", smp_processor_id());
#endif /* CONFIG_SMP */

	trap = TRAP(fp);
	printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp);
	printf("    pc: ");
	xmon_print_symbol(fp->nip, ": ", "\n");

	printf("    lr: ", fp->link);
	xmon_print_symbol(fp->link, ": ", "\n");

	printf("    sp: %lx\n", fp->gpr[1]);
	printf("   msr: %lx\n", fp->msr);

1540
	if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) {
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		printf("   dar: %lx\n", fp->dar);
		if (trap != 0x380)
			printf(" dsisr: %lx\n", fp->dsisr);
	}

	printf("  current = 0x%lx\n", current);
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#ifdef CONFIG_PPC64
1548 1549
	printf("  paca    = 0x%lx\t softe: %d\t irq_happened: 0x%02x\n",
	       local_paca, local_paca->soft_enabled, local_paca->irq_happened);
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#endif
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	if (current) {
		printf("    pid   = %ld, comm = %s\n",
		       current->pid, current->comm);
	}

	if (trap == 0x700)
		print_bug_trap(fp);
1558 1559

	printf(linux_banner);
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}

1562
static void prregs(struct pt_regs *fp)
L
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{
P
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	int n, trap;
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	unsigned long base;
	struct pt_regs regs;

	if (scanhex(&base)) {
		if (setjmp(bus_error_jmp) == 0) {
			catch_memory_errors = 1;
			sync();
			regs = *(struct pt_regs *)base;
			sync();
			__delay(200);
		} else {
			catch_memory_errors = 0;
P
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			printf("*** Error reading registers from "REG"\n",
L
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1578 1579 1580 1581 1582 1583 1584
			       base);
			return;
		}
		catch_memory_errors = 0;
		fp = &regs;
	}

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#ifdef CONFIG_PPC64
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	if (FULL_REGS(fp)) {
		for (n = 0; n < 16; ++n)
P
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			printf("R%.2ld = "REG"   R%.2ld = "REG"\n",
L
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			       n, fp->gpr[n], n+16, fp->gpr[n+16]);
	} else {
		for (n = 0; n < 7; ++n)
P
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			printf("R%.2ld = "REG"   R%.2ld = "REG"\n",
L
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1593 1594
			       n, fp->gpr[n], n+7, fp->gpr[n+7]);
	}
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#else
	for (n = 0; n < 32; ++n) {
		printf("R%.2d = %.8x%s", n, fp->gpr[n],
		       (n & 3) == 3? "\n": "   ");
		if (n == 12 && !FULL_REGS(fp)) {
			printf("\n");
			break;
		}
	}
#endif
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	printf("pc  = ");
	xmon_print_symbol(fp->nip, " ", "\n");
1607 1608 1609 1610
	if (TRAP(fp) != 0xc00 && cpu_has_feature(CPU_FTR_CFAR)) {
		printf("cfar= ");
		xmon_print_symbol(fp->orig_gpr3, " ", "\n");
	}
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	printf("lr  = ");
	xmon_print_symbol(fp->link, " ", "\n");
P
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	printf("msr = "REG"   cr  = %.8lx\n", fp->msr, fp->ccr);
	printf("ctr = "REG"   xer = "REG"   trap = %4lx\n",
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1615
	       fp->ctr, fp->xer, fp->trap);
P
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	trap = TRAP(fp);
	if (trap == 0x300 || trap == 0x380 || trap == 0x600)
		printf("dar = "REG"   dsisr = %.8lx\n", fp->dar, fp->dsisr);
L
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}

1621
static void cacheflush(void)
L
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{
	int cmd;
	unsigned long nflush;

	cmd = inchar();
	if (cmd != 'i')
		termch = cmd;
	scanhex((void *)&adrs);
	if (termch != '\n')
		termch = 0;
	nflush = 1;
	scanhex(&nflush);
	nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES;
	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();

		if (cmd != 'i') {
			for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES)
				cflush((void *) adrs);
		} else {
			for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES)
				cinval((void *) adrs);
		}
		sync();
		/* wait a little while to see if we get a machine check */
		__delay(200);
	}
	catch_memory_errors = 0;
}

1653 1654 1655 1656 1657
extern unsigned long xmon_mfspr(int spr, unsigned long default_value);
extern void xmon_mtspr(int spr, unsigned long value);

static int
read_spr(int n, unsigned long *vp)
L
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{
	unsigned long ret = -1UL;
1660
	int ok = 0;
L
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	if (setjmp(bus_error_jmp) == 0) {
1663
		catch_spr_faults = 1;
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		sync();

1666
		ret = xmon_mfspr(n, *vp);
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		sync();
1669 1670
		*vp = ret;
		ok = 1;
L
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	}
1672
	catch_spr_faults = 0;
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1674
	return ok;
L
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}

1677
static void
L
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write_spr(int n, unsigned long val)
{
	if (setjmp(bus_error_jmp) == 0) {
1681
		catch_spr_faults = 1;
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		sync();

1684
		xmon_mtspr(n, val);
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		sync();
1687 1688
	} else {
		printf("SPR 0x%03x (%4d) Faulted during write\n", n, n);
L
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	}
1690
	catch_spr_faults = 0;
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}

1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721
static void dump_206_sprs(void)
{
#ifdef CONFIG_PPC64
	if (!cpu_has_feature(CPU_FTR_ARCH_206))
		return;

	/* Actually some of these pre-date 2.06, but whatevs */

	printf("srr0   = %.16x  srr1  = %.16x dsisr  = %.8x\n",
		mfspr(SPRN_SRR0), mfspr(SPRN_SRR1), mfspr(SPRN_DSISR));
	printf("dscr   = %.16x  ppr   = %.16x pir    = %.8x\n",
		mfspr(SPRN_DSCR), mfspr(SPRN_PPR), mfspr(SPRN_PIR));

	if (!(mfmsr() & MSR_HV))
		return;

	printf("sdr1   = %.16x  hdar  = %.16x hdsisr = %.8x\n",
		mfspr(SPRN_SDR1), mfspr(SPRN_HDAR), mfspr(SPRN_HDSISR));
	printf("hsrr0  = %.16x hsrr1  = %.16x hdec = %.8x\n",
		mfspr(SPRN_HSRR0), mfspr(SPRN_HSRR1), mfspr(SPRN_HDEC));
	printf("lpcr   = %.16x  pcr   = %.16x lpidr = %.8x\n",
		mfspr(SPRN_LPCR), mfspr(SPRN_PCR), mfspr(SPRN_LPID));
	printf("hsprg0 = %.16x hsprg1 = %.16x\n",
		mfspr(SPRN_HSPRG0), mfspr(SPRN_HSPRG1));
	printf("dabr   = %.16x dabrx  = %.16x\n",
		mfspr(SPRN_DABR), mfspr(SPRN_DABRX));
#endif
}

1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
static void dump_207_sprs(void)
{
#ifdef CONFIG_PPC64
	unsigned long msr;

	if (!cpu_has_feature(CPU_FTR_ARCH_207S))
		return;

	printf("dpdes  = %.16x  tir   = %.16x cir    = %.8x\n",
		mfspr(SPRN_DPDES), mfspr(SPRN_TIR), mfspr(SPRN_CIR));

	printf("fscr   = %.16x  tar   = %.16x pspb   = %.8x\n",
		mfspr(SPRN_FSCR), mfspr(SPRN_TAR), mfspr(SPRN_PSPB));

	msr = mfmsr();
	if (msr & MSR_TM) {
		/* Only if TM has been enabled in the kernel */
		printf("tfhar  = %.16x  tfiar = %.16x texasr = %.16x\n",
			mfspr(SPRN_TFHAR), mfspr(SPRN_TFIAR),
			mfspr(SPRN_TEXASR));
	}

	printf("mmcr0  = %.16x  mmcr1 = %.16x mmcr2  = %.16x\n",
		mfspr(SPRN_MMCR0), mfspr(SPRN_MMCR1), mfspr(SPRN_MMCR2));
	printf("pmc1   = %.8x pmc2 = %.8x  pmc3 = %.8x  pmc4   = %.8x\n",
		mfspr(SPRN_PMC1), mfspr(SPRN_PMC2),
		mfspr(SPRN_PMC3), mfspr(SPRN_PMC4));
	printf("mmcra  = %.16x   siar = %.16x pmc5   = %.8x\n",
		mfspr(SPRN_MMCRA), mfspr(SPRN_SIAR), mfspr(SPRN_PMC5));
	printf("sdar   = %.16x   sier = %.16x pmc6   = %.8x\n",
		mfspr(SPRN_SDAR), mfspr(SPRN_SIER), mfspr(SPRN_PMC6));
	printf("ebbhr  = %.16x  ebbrr = %.16x bescr  = %.16x\n",
		mfspr(SPRN_EBBHR), mfspr(SPRN_EBBRR), mfspr(SPRN_BESCR));

	if (!(msr & MSR_HV))
		return;

	printf("hfscr  = %.16x  dhdes = %.16x rpr    = %.16x\n",
		mfspr(SPRN_HFSCR), mfspr(SPRN_DHDES), mfspr(SPRN_RPR));
	printf("dawr   = %.16x  dawrx = %.16x ciabr  = %.16x\n",
		mfspr(SPRN_DAWR), mfspr(SPRN_DAWRX), mfspr(SPRN_CIABR));
#endif
}
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1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
static void dump_one_spr(int spr, bool show_unimplemented)
{
	unsigned long val;

	val = 0xdeadbeef;
	if (!read_spr(spr, &val)) {
		printf("SPR 0x%03x (%4d) Faulted during read\n", spr, spr);
		return;
	}

	if (val == 0xdeadbeef) {
		/* Looks like read was a nop, confirm */
		val = 0x0badcafe;
		if (!read_spr(spr, &val)) {
			printf("SPR 0x%03x (%4d) Faulted during read\n", spr, spr);
			return;
		}

		if (val == 0x0badcafe) {
			if (show_unimplemented)
				printf("SPR 0x%03x (%4d) Unimplemented\n", spr, spr);
			return;
		}
	}

	printf("SPR 0x%03x (%4d) = 0x%lx\n", spr, spr, val);
}

1794
static void super_regs(void)
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{
1796
	static unsigned long regno;
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	int cmd;
1798
	int spr;
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	cmd = skipbl();
1801 1802 1803

	switch (cmd) {
	case '\n': {
1804
		unsigned long sp, toc;
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		asm("mr %0,1" : "=r" (sp) :);
		asm("mr %0,2" : "=r" (toc) :);

1808
		printf("msr    = "REG"  sprg0 = "REG"\n",
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		       mfmsr(), mfspr(SPRN_SPRG0));
1810
		printf("pvr    = "REG"  sprg1 = "REG"\n",
1811
		       mfspr(SPRN_PVR), mfspr(SPRN_SPRG1));
1812
		printf("dec    = "REG"  sprg2 = "REG"\n",
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		       mfspr(SPRN_DEC), mfspr(SPRN_SPRG2));
1814 1815 1816
		printf("sp     = "REG"  sprg3 = "REG"\n", sp, mfspr(SPRN_SPRG3));
		printf("toc    = "REG"  dar   = "REG"\n", toc, mfspr(SPRN_DAR));

1817
		dump_206_sprs();
1818
		dump_207_sprs();
1819

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		return;
	}
1822 1823 1824 1825 1826
	case 'w': {
		unsigned long val;
		scanhex(&regno);
		val = 0;
		read_spr(regno, &val);
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		scanhex(&val);
		write_spr(regno, val);
1829 1830 1831
		dump_one_spr(regno, true);
		break;
	}
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	case 'r':
1833 1834 1835 1836 1837 1838 1839
		scanhex(&regno);
		dump_one_spr(regno, true);
		break;
	case 'a':
		/* dump ALL SPRs */
		for (spr = 1; spr < 1024; ++spr)
			dump_one_spr(spr, false);
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1840 1841
		break;
	}
1842

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1843 1844 1845 1846 1847 1848
	scannl();
}

/*
 * Stuff for reading and writing memory safely
 */
1849
static int
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mread(unsigned long adrs, void *buf, int size)
{
	volatile int n;
	char *p, *q;

	n = 0;
	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();
		p = (char *)adrs;
		q = (char *)buf;
		switch (size) {
		case 2:
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			*(u16 *)q = *(u16 *)p;
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			break;
		case 4:
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			*(u32 *)q = *(u32 *)p;
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			break;
		case 8:
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			*(u64 *)q = *(u64 *)p;
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			break;
		default:
			for( ; n < size; ++n) {
				*q++ = *p++;
				sync();
			}
		}
		sync();
		/* wait a little while to see if we get a machine check */
		__delay(200);
		n = size;
	}
	catch_memory_errors = 0;
	return n;
}

1886
static int
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mwrite(unsigned long adrs, void *buf, int size)
{
	volatile int n;
	char *p, *q;

	n = 0;
	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();
		p = (char *) adrs;
		q = (char *) buf;
		switch (size) {
		case 2:
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			*(u16 *)p = *(u16 *)q;
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			break;
		case 4:
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			*(u32 *)p = *(u32 *)q;
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			break;
		case 8:
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			*(u64 *)p = *(u64 *)q;
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			break;
		default:
			for ( ; n < size; ++n) {
				*p++ = *q++;
				sync();
			}
		}
		sync();
		/* wait a little while to see if we get a machine check */
		__delay(200);
		n = size;
	} else {
1919
		printf("*** Error writing address "REG"\n", adrs + n);
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	}
	catch_memory_errors = 0;
	return n;
}

static int fault_type;
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static int fault_except;
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static char *fault_chars[] = { "--", "**", "##" };

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static int handle_fault(struct pt_regs *regs)
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{
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	fault_except = TRAP(regs);
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	switch (TRAP(regs)) {
	case 0x200:
		fault_type = 0;
		break;
	case 0x300:
	case 0x380:
		fault_type = 1;
		break;
	default:
		fault_type = 2;
	}

	longjmp(bus_error_jmp, 1);

	return 0;
}

#define SWAP(a, b, t)	((t) = (a), (a) = (b), (b) = (t))

1951
static void
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byterev(unsigned char *val, int size)
{
	int t;
	
	switch (size) {
	case 2:
		SWAP(val[0], val[1], t);
		break;
	case 4:
		SWAP(val[0], val[3], t);
		SWAP(val[1], val[2], t);
		break;
	case 8: /* is there really any use for this? */
		SWAP(val[0], val[7], t);
		SWAP(val[1], val[6], t);
		SWAP(val[2], val[5], t);
		SWAP(val[3], val[4], t);
		break;
	}
}

static int brev;
static int mnoread;

1976
static char *memex_help_string =
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    "Memory examine command usage:\n"
    "m [addr] [flags] examine/change memory\n"
    "  addr is optional.  will start where left off.\n"
    "  flags may include chars from this set:\n"
    "    b   modify by bytes (default)\n"
    "    w   modify by words (2 byte)\n"
    "    l   modify by longs (4 byte)\n"
    "    d   modify by doubleword (8 byte)\n"
    "    r   toggle reverse byte order mode\n"
    "    n   do not read memory (for i/o spaces)\n"
    "    .   ok to read (default)\n"
    "NOTE: flags are saved as defaults\n"
    "";

1991
static char *memex_subcmd_help_string =
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    "Memory examine subcommands:\n"
    "  hexval   write this val to current location\n"
    "  'string' write chars from string to this location\n"
    "  '        increment address\n"
    "  ^        decrement address\n"
    "  /        increment addr by 0x10.  //=0x100, ///=0x1000, etc\n"
    "  \\        decrement addr by 0x10.  \\\\=0x100, \\\\\\=0x1000, etc\n"
    "  `        clear no-read flag\n"
    "  ;        stay at this addr\n"
    "  v        change to byte mode\n"
    "  w        change to word (2 byte) mode\n"
    "  l        change to long (4 byte) mode\n"
    "  u        change to doubleword (8 byte) mode\n"
    "  m addr   change current addr\n"
    "  n        toggle no-read flag\n"
    "  r        toggle byte reverse flag\n"
    "  < count  back up count bytes\n"
    "  > count  skip forward count bytes\n"
    "  x        exit this mode\n"
    "";

2013
static void
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2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046
memex(void)
{
	int cmd, inc, i, nslash;
	unsigned long n;
	unsigned char val[16];

	scanhex((void *)&adrs);
	cmd = skipbl();
	if (cmd == '?') {
		printf(memex_help_string);
		return;
	} else {
		termch = cmd;
	}
	last_cmd = "m\n";
	while ((cmd = skipbl()) != '\n') {
		switch( cmd ){
		case 'b':	size = 1;	break;
		case 'w':	size = 2;	break;
		case 'l':	size = 4;	break;
		case 'd':	size = 8;	break;
		case 'r': 	brev = !brev;	break;
		case 'n':	mnoread = 1;	break;
		case '.':	mnoread = 0;	break;
		}
	}
	if( size <= 0 )
		size = 1;
	else if( size > 8 )
		size = 8;
	for(;;){
		if (!mnoread)
			n = mread(adrs, val, size);
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2047
		printf(REG"%c", adrs, brev? 'r': ' ');
L
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2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162
		if (!mnoread) {
			if (brev)
				byterev(val, size);
			putchar(' ');
			for (i = 0; i < n; ++i)
				printf("%.2x", val[i]);
			for (; i < size; ++i)
				printf("%s", fault_chars[fault_type]);
		}
		putchar(' ');
		inc = size;
		nslash = 0;
		for(;;){
			if( scanhex(&n) ){
				for (i = 0; i < size; ++i)
					val[i] = n >> (i * 8);
				if (!brev)
					byterev(val, size);
				mwrite(adrs, val, size);
				inc = size;
			}
			cmd = skipbl();
			if (cmd == '\n')
				break;
			inc = 0;
			switch (cmd) {
			case '\'':
				for(;;){
					n = inchar();
					if( n == '\\' )
						n = bsesc();
					else if( n == '\'' )
						break;
					for (i = 0; i < size; ++i)
						val[i] = n >> (i * 8);
					if (!brev)
						byterev(val, size);
					mwrite(adrs, val, size);
					adrs += size;
				}
				adrs -= size;
				inc = size;
				break;
			case ',':
				adrs += size;
				break;
			case '.':
				mnoread = 0;
				break;
			case ';':
				break;
			case 'x':
			case EOF:
				scannl();
				return;
			case 'b':
			case 'v':
				size = 1;
				break;
			case 'w':
				size = 2;
				break;
			case 'l':
				size = 4;
				break;
			case 'u':
				size = 8;
				break;
			case '^':
				adrs -= size;
				break;
			case '/':
				if (nslash > 0)
					adrs -= 1 << nslash;
				else
					nslash = 0;
				nslash += 4;
				adrs += 1 << nslash;
				break;
			case '\\':
				if (nslash < 0)
					adrs += 1 << -nslash;
				else
					nslash = 0;
				nslash -= 4;
				adrs -= 1 << -nslash;
				break;
			case 'm':
				scanhex((void *)&adrs);
				break;
			case 'n':
				mnoread = 1;
				break;
			case 'r':
				brev = !brev;
				break;
			case '<':
				n = size;
				scanhex(&n);
				adrs -= n;
				break;
			case '>':
				n = size;
				scanhex(&n);
				adrs += n;
				break;
			case '?':
				printf(memex_subcmd_help_string);
				break;
			}
		}
		adrs += inc;
	}
}

2163
static int
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2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177
bsesc(void)
{
	int c;

	c = inchar();
	switch( c ){
	case 'n':	c = '\n';	break;
	case 'r':	c = '\r';	break;
	case 'b':	c = '\b';	break;
	case 't':	c = '\t';	break;
	}
	return c;
}

2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199
static void xmon_rawdump (unsigned long adrs, long ndump)
{
	long n, m, r, nr;
	unsigned char temp[16];

	for (n = ndump; n > 0;) {
		r = n < 16? n: 16;
		nr = mread(adrs, temp, r);
		adrs += nr;
		for (m = 0; m < r; ++m) {
			if (m < nr)
				printf("%.2x", temp[m]);
			else
				printf("%s", fault_chars[fault_type]);
		}
		n -= r;
		if (nr < r)
			break;
	}
	printf("\n");
}

2200 2201 2202 2203
#ifdef CONFIG_PPC64
static void dump_one_paca(int cpu)
{
	struct paca_struct *p;
2204 2205 2206
#ifdef CONFIG_PPC_STD_MMU_64
	int i = 0;
#endif
2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219

	if (setjmp(bus_error_jmp) != 0) {
		printf("*** Error dumping paca for cpu 0x%x!\n", cpu);
		return;
	}

	catch_memory_errors = 1;
	sync();

	p = &paca[cpu];

	printf("paca for cpu 0x%x @ %p:\n", cpu, p);

2220 2221 2222
	printf(" %-*s = %s\n", 20, "possible", cpu_possible(cpu) ? "yes" : "no");
	printf(" %-*s = %s\n", 20, "present", cpu_present(cpu) ? "yes" : "no");
	printf(" %-*s = %s\n", 20, "online", cpu_online(cpu) ? "yes" : "no");
2223 2224

#define DUMP(paca, name, format) \
2225
	printf(" %-*s = %#-*"format"\t(0x%lx)\n", 20, #name, 18, paca->name, \
2226 2227 2228 2229 2230 2231 2232 2233
		offsetof(struct paca_struct, name));

	DUMP(p, lock_token, "x");
	DUMP(p, paca_index, "x");
	DUMP(p, kernel_toc, "lx");
	DUMP(p, kernelbase, "lx");
	DUMP(p, kernel_msr, "lx");
	DUMP(p, emergency_sp, "p");
2234 2235 2236
#ifdef CONFIG_PPC_BOOK3S_64
	DUMP(p, mc_emergency_sp, "p");
	DUMP(p, in_mce, "x");
2237
	DUMP(p, hmi_event_available, "x");
2238
#endif
2239 2240 2241 2242
	DUMP(p, data_offset, "lx");
	DUMP(p, hw_cpu_id, "x");
	DUMP(p, cpu_start, "x");
	DUMP(p, kexec_state, "x");
2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271
#ifdef CONFIG_PPC_STD_MMU_64
	for (i = 0; i < SLB_NUM_BOLTED; i++) {
		u64 esid, vsid;

		if (!p->slb_shadow_ptr)
			continue;

		esid = be64_to_cpu(p->slb_shadow_ptr->save_area[i].esid);
		vsid = be64_to_cpu(p->slb_shadow_ptr->save_area[i].vsid);

		if (esid || vsid) {
			printf(" slb_shadow[%d]:       = 0x%016lx 0x%016lx\n",
				i, esid, vsid);
		}
	}
	DUMP(p, vmalloc_sllp, "x");
	DUMP(p, slb_cache_ptr, "x");
	for (i = 0; i < SLB_CACHE_ENTRIES; i++)
		printf(" slb_cache[%d]:        = 0x%016lx\n", i, p->slb_cache[i]);
#endif
	DUMP(p, dscr_default, "llx");
#ifdef CONFIG_PPC_BOOK3E
	DUMP(p, pgd, "p");
	DUMP(p, kernel_pgd, "p");
	DUMP(p, tcd_ptr, "p");
	DUMP(p, mc_kstack, "p");
	DUMP(p, crit_kstack, "p");
	DUMP(p, dbg_kstack, "p");
#endif
2272 2273 2274 2275 2276 2277 2278 2279 2280 2281
	DUMP(p, __current, "p");
	DUMP(p, kstack, "lx");
	DUMP(p, stab_rr, "lx");
	DUMP(p, saved_r1, "lx");
	DUMP(p, trap_save, "x");
	DUMP(p, soft_enabled, "x");
	DUMP(p, irq_happened, "x");
	DUMP(p, io_sync, "x");
	DUMP(p, irq_work_pending, "x");
	DUMP(p, nap_state_lost, "x");
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293
	DUMP(p, sprg_vdso, "llx");

#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
	DUMP(p, tm_scratch, "llx");
#endif

#ifdef CONFIG_PPC_POWERNV
	DUMP(p, core_idle_state_ptr, "p");
	DUMP(p, thread_idle_state, "x");
	DUMP(p, thread_mask, "x");
	DUMP(p, subcore_sibling_mask, "x");
#endif
2294

2295 2296 2297
	DUMP(p, accounting.utime, "llx");
	DUMP(p, accounting.stime, "llx");
	DUMP(p, accounting.utime_scaled, "llx");
2298 2299 2300 2301
	DUMP(p, accounting.starttime, "llx");
	DUMP(p, accounting.starttime_user, "llx");
	DUMP(p, accounting.startspurr, "llx");
	DUMP(p, accounting.utime_sspurr, "llx");
2302
	DUMP(p, accounting.steal_time, "llx");
2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341
#undef DUMP

	catch_memory_errors = 0;
	sync();
}

static void dump_all_pacas(void)
{
	int cpu;

	if (num_possible_cpus() == 0) {
		printf("No possible cpus, use 'dp #' to dump individual cpus\n");
		return;
	}

	for_each_possible_cpu(cpu)
		dump_one_paca(cpu);
}

static void dump_pacas(void)
{
	unsigned long num;
	int c;

	c = inchar();
	if (c == 'a') {
		dump_all_pacas();
		return;
	}

	termch = c;	/* Put c back, it wasn't 'a' */

	if (scanhex(&num))
		dump_one_paca(num);
	else
		dump_one_paca(xmon_owner);
}
#endif

2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373
static void dump_by_size(unsigned long addr, long count, int size)
{
	unsigned char temp[16];
	int i, j;
	u64 val;

	count = ALIGN(count, 16);

	for (i = 0; i < count; i += 16, addr += 16) {
		printf(REG, addr);

		if (mread(addr, temp, 16) != 16) {
			printf("\nFaulted reading %d bytes from 0x"REG"\n", 16, addr);
			return;
		}

		for (j = 0; j < 16; j += size) {
			putchar(' ');
			switch (size) {
			case 1: val = temp[j]; break;
			case 2: val = *(u16 *)&temp[j]; break;
			case 4: val = *(u32 *)&temp[j]; break;
			case 8: val = *(u64 *)&temp[j]; break;
			default: val = 0;
			}

			printf("%0*lx", size * 2, val);
		}
		printf("\n");
	}
}

2374
static void
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dump(void)
{
2377
	static char last[] = { "d?\n" };
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	int c;

	c = inchar();
2381 2382 2383

#ifdef CONFIG_PPC64
	if (c == 'p') {
2384
		xmon_start_pagination();
2385
		dump_pacas();
2386
		xmon_end_pagination();
2387 2388 2389 2390
		return;
	}
#endif

2391
	if (c == '\n')
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		termch = c;
2393

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	scanhex((void *)&adrs);
	if (termch != '\n')
		termch = 0;
	if (c == 'i') {
		scanhex(&nidump);
		if (nidump == 0)
			nidump = 16;
		else if (nidump > MAX_DUMP)
			nidump = MAX_DUMP;
		adrs += ppc_inst_dump(adrs, nidump, 1);
		last_cmd = "di\n";
2405 2406
	} else if (c == 'l') {
		dump_log_buf();
2407 2408
	} else if (c == 'o') {
		dump_opal_msglog();
2409 2410 2411
	} else if (c == 't') {
		ftrace_dump(DUMP_ALL);
		tracing_on();
2412 2413 2414 2415 2416 2417 2418
	} else if (c == 'r') {
		scanhex(&ndump);
		if (ndump == 0)
			ndump = 64;
		xmon_rawdump(adrs, ndump);
		adrs += ndump;
		last_cmd = "dr\n";
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	} else {
		scanhex(&ndump);
		if (ndump == 0)
			ndump = 64;
		else if (ndump > MAX_DUMP)
			ndump = MAX_DUMP;
2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440

		switch (c) {
		case '8':
		case '4':
		case '2':
		case '1':
			ndump = ALIGN(ndump, 16);
			dump_by_size(adrs, ndump, c - '0');
			last[1] = c;
			last_cmd = last;
			break;
		default:
			prdump(adrs, ndump);
			last_cmd = "d\n";
		}

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2441 2442 2443 2444
		adrs += ndump;
	}
}

2445
static void
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prdump(unsigned long adrs, long ndump)
{
	long n, m, c, r, nr;
	unsigned char temp[16];

	for (n = ndump; n > 0;) {
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		printf(REG, adrs);
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		putchar(' ');
		r = n < 16? n: 16;
		nr = mread(adrs, temp, r);
		adrs += nr;
		for (m = 0; m < r; ++m) {
2458
			if ((m & (sizeof(long) - 1)) == 0 && m > 0)
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				putchar(' ');
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			if (m < nr)
				printf("%.2x", temp[m]);
			else
				printf("%s", fault_chars[fault_type]);
		}
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		for (; m < 16; ++m) {
2466
			if ((m & (sizeof(long) - 1)) == 0)
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				putchar(' ');
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			printf("  ");
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2469
		}
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		printf("  |");
		for (m = 0; m < r; ++m) {
			if (m < nr) {
				c = temp[m];
				putchar(' ' <= c && c <= '~'? c: '.');
			} else
				putchar(' ');
		}
		n -= r;
		for (; m < 16; ++m)
			putchar(' ');
		printf("|\n");
		if (nr < r)
			break;
	}
}

2487 2488
typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr);

2489
static int
2490 2491
generic_inst_dump(unsigned long adr, long count, int praddr,
			instruction_dump_func dump_func)
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{
	int nr, dotted;
	unsigned long first_adr;
	unsigned long inst, last_inst = 0;
	unsigned char val[4];

	dotted = 0;
	for (first_adr = adr; count > 0; --count, adr += 4) {
		nr = mread(adr, val, 4);
		if (nr == 0) {
			if (praddr) {
				const char *x = fault_chars[fault_type];
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				printf(REG"  %s%s%s%s\n", adr, x, x, x, x);
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			}
			break;
		}
		inst = GETWORD(val);
		if (adr > first_adr && inst == last_inst) {
			if (!dotted) {
				printf(" ...\n");
				dotted = 1;
			}
			continue;
		}
		dotted = 0;
		last_inst = inst;
		if (praddr)
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			printf(REG"  %.8x", adr, inst);
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		printf("\t");
2521
		dump_func(inst, adr);
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		printf("\n");
	}
	return adr - first_adr;
}

2527
static int
2528 2529 2530 2531 2532
ppc_inst_dump(unsigned long adr, long count, int praddr)
{
	return generic_inst_dump(adr, count, praddr, print_insn_powerpc);
}

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void
print_address(unsigned long addr)
{
	xmon_print_symbol(addr, "\t# ", "");
}

2539 2540 2541
void
dump_log_buf(void)
{
2542 2543 2544
	struct kmsg_dumper dumper = { .active = 1 };
	unsigned char buf[128];
	size_t len;
2545

2546
	if (setjmp(bus_error_jmp) != 0) {
2547
		printf("Error dumping printk buffer!\n");
2548 2549
		return;
	}
2550

2551 2552
	catch_memory_errors = 1;
	sync();
2553

2554
	kmsg_dump_rewind_nolock(&dumper);
2555
	xmon_start_pagination();
2556 2557 2558 2559
	while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) {
		buf[len] = '\0';
		printf("%s", buf);
	}
2560
	xmon_end_pagination();
2561

2562 2563 2564 2565
	sync();
	/* wait a little while to see if we get a machine check */
	__delay(200);
	catch_memory_errors = 0;
2566
}
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2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606
#ifdef CONFIG_PPC_POWERNV
static void dump_opal_msglog(void)
{
	unsigned char buf[128];
	ssize_t res;
	loff_t pos = 0;

	if (!firmware_has_feature(FW_FEATURE_OPAL)) {
		printf("Machine is not running OPAL firmware.\n");
		return;
	}

	if (setjmp(bus_error_jmp) != 0) {
		printf("Error dumping OPAL msglog!\n");
		return;
	}

	catch_memory_errors = 1;
	sync();

	xmon_start_pagination();
	while ((res = opal_msglog_copy(buf, pos, sizeof(buf) - 1))) {
		if (res < 0) {
			printf("Error dumping OPAL msglog! Error: %zd\n", res);
			break;
		}
		buf[res] = '\0';
		printf("%s", buf);
		pos += res;
	}
	xmon_end_pagination();

	sync();
	/* wait a little while to see if we get a machine check */
	__delay(200);
	catch_memory_errors = 0;
}
#endif

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/*
 * Memory operations - move, set, print differences
 */
static unsigned long mdest;		/* destination address */
static unsigned long msrc;		/* source address */
static unsigned long mval;		/* byte value to set memory to */
static unsigned long mcount;		/* # bytes to affect */
static unsigned long mdiffs;		/* max # differences to print */

2616
static void
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2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641
memops(int cmd)
{
	scanhex((void *)&mdest);
	if( termch != '\n' )
		termch = 0;
	scanhex((void *)(cmd == 's'? &mval: &msrc));
	if( termch != '\n' )
		termch = 0;
	scanhex((void *)&mcount);
	switch( cmd ){
	case 'm':
		memmove((void *)mdest, (void *)msrc, mcount);
		break;
	case 's':
		memset((void *)mdest, mval, mcount);
		break;
	case 'd':
		if( termch != '\n' )
			termch = 0;
		scanhex((void *)&mdiffs);
		memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs);
		break;
	}
}

2642
static void
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2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659
memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr)
{
	unsigned n, prt;

	prt = 0;
	for( n = nb; n > 0; --n )
		if( *p1++ != *p2++ )
			if( ++prt <= maxpr )
				printf("%.16x %.2x # %.16x %.2x\n", p1 - 1,
					p1[-1], p2 - 1, p2[-1]);
	if( prt > maxpr )
		printf("Total of %d differences\n", prt);
}

static unsigned mend;
static unsigned mask;

2660
static void
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2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692
memlocate(void)
{
	unsigned a, n;
	unsigned char val[4];

	last_cmd = "ml";
	scanhex((void *)&mdest);
	if (termch != '\n') {
		termch = 0;
		scanhex((void *)&mend);
		if (termch != '\n') {
			termch = 0;
			scanhex((void *)&mval);
			mask = ~0;
			if (termch != '\n') termch = 0;
			scanhex((void *)&mask);
		}
	}
	n = 0;
	for (a = mdest; a < mend; a += 4) {
		if (mread(a, val, 4) == 4
			&& ((GETWORD(val) ^ mval) & mask) == 0) {
			printf("%.16x:  %.16x\n", a, GETWORD(val));
			if (++n >= 10)
				break;
		}
	}
}

static unsigned long mskip = 0x1000;
static unsigned long mlim = 0xffffffff;

2693
static void
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2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719
memzcan(void)
{
	unsigned char v;
	unsigned a;
	int ok, ook;

	scanhex(&mdest);
	if (termch != '\n') termch = 0;
	scanhex(&mskip);
	if (termch != '\n') termch = 0;
	scanhex(&mlim);
	ook = 0;
	for (a = mdest; a < mlim; a += mskip) {
		ok = mread(a, &v, 1);
		if (ok && !ook) {
			printf("%.8x .. ", a);
		} else if (!ok && ook)
			printf("%.8x\n", a - mskip);
		ook = ok;
		if (a + mskip < a)
			break;
	}
	if (ook)
		printf("%.8x\n", a - mskip);
}

2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774
static void show_task(struct task_struct *tsk)
{
	char state;

	/*
	 * Cloned from kdb_task_state_char(), which is not entirely
	 * appropriate for calling from xmon. This could be moved
	 * to a common, generic, routine used by both.
	 */
	state = (tsk->state == 0) ? 'R' :
		(tsk->state < 0) ? 'U' :
		(tsk->state & TASK_UNINTERRUPTIBLE) ? 'D' :
		(tsk->state & TASK_STOPPED) ? 'T' :
		(tsk->state & TASK_TRACED) ? 'C' :
		(tsk->exit_state & EXIT_ZOMBIE) ? 'Z' :
		(tsk->exit_state & EXIT_DEAD) ? 'E' :
		(tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?';

	printf("%p %016lx %6d %6d %c %2d %s\n", tsk,
		tsk->thread.ksp,
		tsk->pid, tsk->parent->pid,
		state, task_thread_info(tsk)->cpu,
		tsk->comm);
}

static void show_tasks(void)
{
	unsigned long tskv;
	struct task_struct *tsk = NULL;

	printf("     task_struct     ->thread.ksp    PID   PPID S  P CMD\n");

	if (scanhex(&tskv))
		tsk = (struct task_struct *)tskv;

	if (setjmp(bus_error_jmp) != 0) {
		catch_memory_errors = 0;
		printf("*** Error dumping task %p\n", tsk);
		return;
	}

	catch_memory_errors = 1;
	sync();

	if (tsk)
		show_task(tsk);
	else
		for_each_process(tsk)
			show_task(tsk);

	sync();
	__delay(200);
	catch_memory_errors = 0;
}

2775
static void proccall(void)
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{
	unsigned long args[8];
	unsigned long ret;
	int i;
	typedef unsigned long (*callfunc_t)(unsigned long, unsigned long,
			unsigned long, unsigned long, unsigned long,
			unsigned long, unsigned long, unsigned long);
	callfunc_t func;

	if (!scanhex(&adrs))
		return;
	if (termch != '\n')
		termch = 0;
	for (i = 0; i < 8; ++i)
		args[i] = 0;
	for (i = 0; i < 8; ++i) {
		if (!scanhex(&args[i]) || termch == '\n')
			break;
		termch = 0;
	}
	func = (callfunc_t) adrs;
	ret = 0;
	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();
		ret = func(args[0], args[1], args[2], args[3],
			   args[4], args[5], args[6], args[7]);
		sync();
2804
		printf("return value is 0x%lx\n", ret);
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2805 2806 2807 2808 2809 2810
	} else {
		printf("*** %x exception occurred\n", fault_except);
	}
	catch_memory_errors = 0;
}

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/* Input scanning routines */
int
skipbl(void)
{
	int c;

	if( termch != 0 ){
		c = termch;
		termch = 0;
	} else
		c = inchar();
	while( c == ' ' || c == '\t' )
		c = inchar();
	return c;
}

#define N_PTREGS	44
static char *regnames[N_PTREGS] = {
	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
	"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
	"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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2833 2834 2835 2836 2837 2838
	"pc", "msr", "or3", "ctr", "lr", "xer", "ccr",
#ifdef CONFIG_PPC64
	"softe",
#else
	"mq",
#endif
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	"trap", "dar", "dsisr", "res"
};

int
scanhex(unsigned long *vp)
{
	int c, d;
	unsigned long v;

	c = skipbl();
	if (c == '%') {
		/* parse register name */
		char regname[8];
		int i;

		for (i = 0; i < sizeof(regname) - 1; ++i) {
			c = inchar();
			if (!isalnum(c)) {
				termch = c;
				break;
			}
			regname[i] = c;
		}
		regname[i] = 0;
		for (i = 0; i < N_PTREGS; ++i) {
			if (strcmp(regnames[i], regname) == 0) {
				if (xmon_regs == NULL) {
					printf("regs not available\n");
					return 0;
				}
				*vp = ((unsigned long *)xmon_regs)[i];
				return 1;
			}
		}
		printf("invalid register name '%%%s'\n", regname);
		return 0;
	}

	/* skip leading "0x" if any */

	if (c == '0') {
		c = inchar();
		if (c == 'x') {
			c = inchar();
		} else {
			d = hexdigit(c);
			if (d == EOF) {
				termch = c;
				*vp = 0;
				return 1;
			}
		}
	} else if (c == '$') {
		int i;
		for (i=0; i<63; i++) {
			c = inchar();
2895
			if (isspace(c) || c == '\0') {
L
Linus Torvalds 已提交
2896 2897 2898 2899 2900 2901
				termch = c;
				break;
			}
			tmpstr[i] = c;
		}
		tmpstr[i++] = 0;
2902 2903 2904 2905 2906 2907 2908 2909
		*vp = 0;
		if (setjmp(bus_error_jmp) == 0) {
			catch_memory_errors = 1;
			sync();
			*vp = kallsyms_lookup_name(tmpstr);
			sync();
		}
		catch_memory_errors = 0;
L
Linus Torvalds 已提交
2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932
		if (!(*vp)) {
			printf("unknown symbol '%s'\n", tmpstr);
			return 0;
		}
		return 1;
	}

	d = hexdigit(c);
	if (d == EOF) {
		termch = c;
		return 0;
	}
	v = 0;
	do {
		v = (v << 4) + d;
		c = inchar();
		d = hexdigit(c);
	} while (d != EOF);
	termch = c;
	*vp = v;
	return 1;
}

2933
static void
L
Linus Torvalds 已提交
2934 2935 2936 2937 2938 2939 2940 2941 2942 2943
scannl(void)
{
	int c;

	c = termch;
	termch = 0;
	while( c != '\n' )
		c = inchar();
}

2944
static int hexdigit(int c)
L
Linus Torvalds 已提交
2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974
{
	if( '0' <= c && c <= '9' )
		return c - '0';
	if( 'A' <= c && c <= 'F' )
		return c - ('A' - 10);
	if( 'a' <= c && c <= 'f' )
		return c - ('a' - 10);
	return EOF;
}

void
getstring(char *s, int size)
{
	int c;

	c = skipbl();
	do {
		if( size > 1 ){
			*s++ = c;
			--size;
		}
		c = inchar();
	} while( c != ' ' && c != '\t' && c != '\n' );
	termch = c;
	*s = 0;
}

static char line[256];
static char *lineptr;

2975
static void
L
Linus Torvalds 已提交
2976 2977 2978 2979 2980
flush_input(void)
{
	lineptr = NULL;
}

2981
static int
L
Linus Torvalds 已提交
2982 2983 2984
inchar(void)
{
	if (lineptr == NULL || *lineptr == 0) {
2985
		if (xmon_gets(line, sizeof(line)) == NULL) {
L
Linus Torvalds 已提交
2986 2987 2988 2989 2990 2991 2992 2993
			lineptr = NULL;
			return EOF;
		}
		lineptr = line;
	}
	return *lineptr++;
}

2994
static void
L
Linus Torvalds 已提交
2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040
take_input(char *str)
{
	lineptr = str;
}


static void
symbol_lookup(void)
{
	int type = inchar();
	unsigned long addr;
	static char tmp[64];

	switch (type) {
	case 'a':
		if (scanhex(&addr))
			xmon_print_symbol(addr, ": ", "\n");
		termch = 0;
		break;
	case 's':
		getstring(tmp, 64);
		if (setjmp(bus_error_jmp) == 0) {
			catch_memory_errors = 1;
			sync();
			addr = kallsyms_lookup_name(tmp);
			if (addr)
				printf("%s: %lx\n", tmp, addr);
			else
				printf("Symbol '%s' not found.\n", tmp);
			sync();
		}
		catch_memory_errors = 0;
		termch = 0;
		break;
	}
}


/* Print an address in numeric and symbolic form (if possible) */
static void xmon_print_symbol(unsigned long address, const char *mid,
			      const char *after)
{
	char *modname;
	const char *name = NULL;
	unsigned long offset, size;

P
Paul Mackerras 已提交
3041
	printf(REG, address);
L
Linus Torvalds 已提交
3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061
	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();
		name = kallsyms_lookup(address, &size, &offset, &modname,
				       tmpstr);
		sync();
		/* wait a little while to see if we get a machine check */
		__delay(200);
	}

	catch_memory_errors = 0;

	if (name) {
		printf("%s%s+%#lx/%#lx", mid, name, offset, size);
		if (modname)
			printf(" [%s]", modname);
	}
	printf("%s", after);
}

3062
#ifdef CONFIG_PPC_STD_MMU_64
M
Michael Ellerman 已提交
3063
void dump_segments(void)
L
Linus Torvalds 已提交
3064 3065
{
	int i;
3066
	unsigned long esid,vsid;
W
will schmidt 已提交
3067
	unsigned long llp;
L
Linus Torvalds 已提交
3068

3069
	printf("SLB contents of cpu 0x%x\n", smp_processor_id());
L
Linus Torvalds 已提交
3070

3071
	for (i = 0; i < mmu_slb_size; i++) {
W
will schmidt 已提交
3072 3073
		asm volatile("slbmfee  %0,%1" : "=r" (esid) : "r" (i));
		asm volatile("slbmfev  %0,%1" : "=r" (vsid) : "r" (i));
3074
		if (esid || vsid) {
W
will schmidt 已提交
3075
			printf("%02d %016lx %016lx", i, esid, vsid);
3076
			if (esid & SLB_ESID_V) {
W
will schmidt 已提交
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091
				llp = vsid & SLB_VSID_LLP;
				if (vsid & SLB_VSID_B_1T) {
					printf("  1T  ESID=%9lx  VSID=%13lx LLP:%3lx \n",
						GET_ESID_1T(esid),
						(vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT_1T,
						llp);
				} else {
					printf(" 256M ESID=%9lx  VSID=%13lx LLP:%3lx \n",
						GET_ESID(esid),
						(vsid & ~SLB_VSID_B) >> SLB_VSID_SHIFT,
						llp);
				}
			} else
				printf("\n");
		}
L
Linus Torvalds 已提交
3092 3093
	}
}
P
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3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107
#endif

#ifdef CONFIG_PPC_STD_MMU_32
void dump_segments(void)
{
	int i;

	printf("sr0-15 =");
	for (i = 0; i < 16; ++i)
		printf(" %x", mfsrin(i));
	printf("\n");
}
#endif

3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133
#ifdef CONFIG_44x
static void dump_tlb_44x(void)
{
	int i;

	for (i = 0; i < PPC44x_TLB_SIZE; i++) {
		unsigned long w0,w1,w2;
		asm volatile("tlbre  %0,%1,0" : "=r" (w0) : "r" (i));
		asm volatile("tlbre  %0,%1,1" : "=r" (w1) : "r" (i));
		asm volatile("tlbre  %0,%1,2" : "=r" (w2) : "r" (i));
		printf("[%02x] %08x %08x %08x ", i, w0, w1, w2);
		if (w0 & PPC44x_TLB_VALID) {
			printf("V %08x -> %01x%08x %c%c%c%c%c",
			       w0 & PPC44x_TLB_EPN_MASK,
			       w1 & PPC44x_TLB_ERPN_MASK,
			       w1 & PPC44x_TLB_RPN_MASK,
			       (w2 & PPC44x_TLB_W) ? 'W' : 'w',
			       (w2 & PPC44x_TLB_I) ? 'I' : 'i',
			       (w2 & PPC44x_TLB_M) ? 'M' : 'm',
			       (w2 & PPC44x_TLB_G) ? 'G' : 'g',
			       (w2 & PPC44x_TLB_E) ? 'E' : 'e');
		}
		printf("\n");
	}
}
#endif /* CONFIG_44x */
3134

3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278
#ifdef CONFIG_PPC_BOOK3E
static void dump_tlb_book3e(void)
{
	u32 mmucfg, pidmask, lpidmask;
	u64 ramask;
	int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0;
	int mmu_version;
	static const char *pgsz_names[] = {
		"  1K",
		"  2K",
		"  4K",
		"  8K",
		" 16K",
		" 32K",
		" 64K",
		"128K",
		"256K",
		"512K",
		"  1M",
		"  2M",
		"  4M",
		"  8M",
		" 16M",
		" 32M",
		" 64M",
		"128M",
		"256M",
		"512M",
		"  1G",
		"  2G",
		"  4G",
		"  8G",
		" 16G",
		" 32G",
		" 64G",
		"128G",
		"256G",
		"512G",
		"  1T",
		"  2T",
	};

	/* Gather some infos about the MMU */
	mmucfg = mfspr(SPRN_MMUCFG);
	mmu_version = (mmucfg & 3) + 1;
	ntlbs = ((mmucfg >> 2) & 3) + 1;
	pidsz = ((mmucfg >> 6) & 0x1f) + 1;
	lpidsz = (mmucfg >> 24) & 0xf;
	rasz = (mmucfg >> 16) & 0x7f;
	if ((mmu_version > 1) && (mmucfg & 0x10000))
		lrat = 1;
	printf("Book3E MMU MAV=%d.0,%d TLBs,%d-bit PID,%d-bit LPID,%d-bit RA\n",
	       mmu_version, ntlbs, pidsz, lpidsz, rasz);
	pidmask = (1ul << pidsz) - 1;
	lpidmask = (1ul << lpidsz) - 1;
	ramask = (1ull << rasz) - 1;

	for (tlb = 0; tlb < ntlbs; tlb++) {
		u32 tlbcfg;
		int nent, assoc, new_cc = 1;
		printf("TLB %d:\n------\n", tlb);
		switch(tlb) {
		case 0:
			tlbcfg = mfspr(SPRN_TLB0CFG);
			break;
		case 1:
			tlbcfg = mfspr(SPRN_TLB1CFG);
			break;
		case 2:
			tlbcfg = mfspr(SPRN_TLB2CFG);
			break;
		case 3:
			tlbcfg = mfspr(SPRN_TLB3CFG);
			break;
		default:
			printf("Unsupported TLB number !\n");
			continue;
		}
		nent = tlbcfg & 0xfff;
		assoc = (tlbcfg >> 24) & 0xff;
		for (i = 0; i < nent; i++) {
			u32 mas0 = MAS0_TLBSEL(tlb);
			u32 mas1 = MAS1_TSIZE(BOOK3E_PAGESZ_4K);
			u64 mas2 = 0;
			u64 mas7_mas3;
			int esel = i, cc = i;

			if (assoc != 0) {
				cc = i / assoc;
				esel = i % assoc;
				mas2 = cc * 0x1000;
			}

			mas0 |= MAS0_ESEL(esel);
			mtspr(SPRN_MAS0, mas0);
			mtspr(SPRN_MAS1, mas1);
			mtspr(SPRN_MAS2, mas2);
			asm volatile("tlbre  0,0,0" : : : "memory");
			mas1 = mfspr(SPRN_MAS1);
			mas2 = mfspr(SPRN_MAS2);
			mas7_mas3 = mfspr(SPRN_MAS7_MAS3);
			if (assoc && (i % assoc) == 0)
				new_cc = 1;
			if (!(mas1 & MAS1_VALID))
				continue;
			if (assoc == 0)
				printf("%04x- ", i);
			else if (new_cc)
				printf("%04x-%c", cc, 'A' + esel);
			else
				printf("    |%c", 'A' + esel);
			new_cc = 0;
			printf(" %016llx %04x %s %c%c AS%c",
			       mas2 & ~0x3ffull,
			       (mas1 >> 16) & 0x3fff,
			       pgsz_names[(mas1 >> 7) & 0x1f],
			       mas1 & MAS1_IND ? 'I' : ' ',
			       mas1 & MAS1_IPROT ? 'P' : ' ',
			       mas1 & MAS1_TS ? '1' : '0');
			printf(" %c%c%c%c%c%c%c",
			       mas2 & MAS2_X0 ? 'a' : ' ',
			       mas2 & MAS2_X1 ? 'v' : ' ',
			       mas2 & MAS2_W  ? 'w' : ' ',
			       mas2 & MAS2_I  ? 'i' : ' ',
			       mas2 & MAS2_M  ? 'm' : ' ',
			       mas2 & MAS2_G  ? 'g' : ' ',
			       mas2 & MAS2_E  ? 'e' : ' ');
			printf(" %016llx", mas7_mas3 & ramask & ~0x7ffull);
			if (mas1 & MAS1_IND)
				printf(" %s\n",
				       pgsz_names[(mas7_mas3 >> 1) & 0x1f]);
			else
				printf(" U%c%c%c S%c%c%c\n",
				       mas7_mas3 & MAS3_UX ? 'x' : ' ',
				       mas7_mas3 & MAS3_UW ? 'w' : ' ',
				       mas7_mas3 & MAS3_UR ? 'r' : ' ',
				       mas7_mas3 & MAS3_SX ? 'x' : ' ',
				       mas7_mas3 & MAS3_SW ? 'w' : ' ',
				       mas7_mas3 & MAS3_SR ? 'r' : ' ');
		}
	}
}
#endif /* CONFIG_PPC_BOOK3E */

3279
static void xmon_init(int enable)
O
Olaf Hering 已提交
3280 3281 3282 3283 3284 3285 3286
{
	if (enable) {
		__debugger = xmon;
		__debugger_ipi = xmon_ipi;
		__debugger_bpt = xmon_bpt;
		__debugger_sstep = xmon_sstep;
		__debugger_iabr_match = xmon_iabr_match;
3287
		__debugger_break_match = xmon_break_match;
O
Olaf Hering 已提交
3288 3289 3290 3291 3292 3293 3294
		__debugger_fault_handler = xmon_fault_handler;
	} else {
		__debugger = NULL;
		__debugger_ipi = NULL;
		__debugger_bpt = NULL;
		__debugger_sstep = NULL;
		__debugger_iabr_match = NULL;
3295
		__debugger_break_match = NULL;
O
Olaf Hering 已提交
3296 3297
		__debugger_fault_handler = NULL;
	}
L
Linus Torvalds 已提交
3298
}
3299 3300

#ifdef CONFIG_MAGIC_SYSRQ
3301
static void sysrq_handle_xmon(int key)
3302 3303 3304
{
	/* ensure xmon is enabled */
	xmon_init(1);
3305
	debugger(get_irq_regs());
3306 3307
	if (!xmon_on)
		xmon_init(0);
3308 3309
}

3310
static struct sysrq_key_op sysrq_xmon_op = {
3311
	.handler =	sysrq_handle_xmon,
3312
	.help_msg =	"xmon(x)",
3313 3314 3315 3316 3317 3318 3319 3320 3321 3322
	.action_msg =	"Entering xmon",
};

static int __init setup_xmon_sysrq(void)
{
	register_sysrq_key('x', &sysrq_xmon_op);
	return 0;
}
__initcall(setup_xmon_sysrq);
#endif /* CONFIG_MAGIC_SYSRQ */
3323

3324
static int __initdata xmon_early;
3325 3326 3327 3328 3329 3330 3331

static int __init early_parse_xmon(char *p)
{
	if (!p || strncmp(p, "early", 5) == 0) {
		/* just "xmon" is equivalent to "xmon=early" */
		xmon_init(1);
		xmon_early = 1;
3332 3333
		xmon_on = 1;
	} else if (strncmp(p, "on", 2) == 0) {
3334
		xmon_init(1);
3335 3336 3337
		xmon_on = 1;
	} else if (strncmp(p, "off", 3) == 0)
		xmon_on = 0;
3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348
	else if (strncmp(p, "nobt", 4) == 0)
		xmon_no_auto_backtrace = 1;
	else
		return 1;

	return 0;
}
early_param("xmon", early_parse_xmon);

void __init xmon_setup(void)
{
3349
	if (xmon_on)
3350 3351 3352 3353
		xmon_init(1);
	if (xmon_early)
		debugger(NULL);
}
3354

3355
#ifdef CONFIG_SPU_BASE
3356 3357 3358 3359 3360

struct spu_info {
	struct spu *spu;
	u64 saved_mfc_sr1_RW;
	u32 saved_spu_runcntl_RW;
3361
	unsigned long dump_addr;
3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380
	u8 stopped_ok;
};

#define XMON_NUM_SPUS	16	/* Enough for current hardware */

static struct spu_info spu_info[XMON_NUM_SPUS];

void xmon_register_spus(struct list_head *list)
{
	struct spu *spu;

	list_for_each_entry(spu, list, full_list) {
		if (spu->number >= XMON_NUM_SPUS) {
			WARN_ON(1);
			continue;
		}

		spu_info[spu->number].spu = spu;
		spu_info[spu->number].stopped_ok = 0;
3381 3382
		spu_info[spu->number].dump_addr = (unsigned long)
				spu_info[spu->number].spu->local_store;
3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414
	}
}

static void stop_spus(void)
{
	struct spu *spu;
	int i;
	u64 tmp;

	for (i = 0; i < XMON_NUM_SPUS; i++) {
		if (!spu_info[i].spu)
			continue;

		if (setjmp(bus_error_jmp) == 0) {
			catch_memory_errors = 1;
			sync();

			spu = spu_info[i].spu;

			spu_info[i].saved_spu_runcntl_RW =
				in_be32(&spu->problem->spu_runcntl_RW);

			tmp = spu_mfc_sr1_get(spu);
			spu_info[i].saved_mfc_sr1_RW = tmp;

			tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK;
			spu_mfc_sr1_set(spu, tmp);

			sync();
			__delay(200);

			spu_info[i].stopped_ok = 1;
3415 3416 3417 3418

			printf("Stopped spu %.2d (was %s)\n", i,
					spu_info[i].saved_spu_runcntl_RW ?
					"running" : "stopped");
3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462
		} else {
			catch_memory_errors = 0;
			printf("*** Error stopping spu %.2d\n", i);
		}
		catch_memory_errors = 0;
	}
}

static void restart_spus(void)
{
	struct spu *spu;
	int i;

	for (i = 0; i < XMON_NUM_SPUS; i++) {
		if (!spu_info[i].spu)
			continue;

		if (!spu_info[i].stopped_ok) {
			printf("*** Error, spu %d was not successfully stopped"
					", not restarting\n", i);
			continue;
		}

		if (setjmp(bus_error_jmp) == 0) {
			catch_memory_errors = 1;
			sync();

			spu = spu_info[i].spu;
			spu_mfc_sr1_set(spu, spu_info[i].saved_mfc_sr1_RW);
			out_be32(&spu->problem->spu_runcntl_RW,
					spu_info[i].saved_spu_runcntl_RW);

			sync();
			__delay(200);

			printf("Restarted spu %.2d\n", i);
		} else {
			catch_memory_errors = 0;
			printf("*** Error restarting spu %.2d\n", i);
		}
		catch_memory_errors = 0;
	}
}

3463
#define DUMP_WIDTH	23
3464
#define DUMP_VALUE(format, field, value)				\
3465 3466 3467 3468 3469
do {									\
	if (setjmp(bus_error_jmp) == 0) {				\
		catch_memory_errors = 1;				\
		sync();							\
		printf("  %-*s = "format"\n", DUMP_WIDTH,		\
3470
				#field, value);				\
3471 3472 3473 3474 3475 3476 3477 3478 3479 3480
		sync();							\
		__delay(200);						\
	} else {							\
		catch_memory_errors = 0;				\
		printf("  %-*s = *** Error reading field.\n",		\
					DUMP_WIDTH, #field);		\
	}								\
	catch_memory_errors = 0;					\
} while (0)

3481 3482 3483
#define DUMP_FIELD(obj, format, field)	\
	DUMP_VALUE(format, field, obj->field)

3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495
static void dump_spu_fields(struct spu *spu)
{
	printf("Dumping spu fields at address %p:\n", spu);

	DUMP_FIELD(spu, "0x%x", number);
	DUMP_FIELD(spu, "%s", name);
	DUMP_FIELD(spu, "0x%lx", local_store_phys);
	DUMP_FIELD(spu, "0x%p", local_store);
	DUMP_FIELD(spu, "0x%lx", ls_size);
	DUMP_FIELD(spu, "0x%x", node);
	DUMP_FIELD(spu, "0x%lx", flags);
	DUMP_FIELD(spu, "%d", class_0_pending);
3496 3497 3498
	DUMP_FIELD(spu, "0x%lx", class_0_dar);
	DUMP_FIELD(spu, "0x%lx", class_1_dar);
	DUMP_FIELD(spu, "0x%lx", class_1_dsisr);
3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509
	DUMP_FIELD(spu, "0x%lx", irqs[0]);
	DUMP_FIELD(spu, "0x%lx", irqs[1]);
	DUMP_FIELD(spu, "0x%lx", irqs[2]);
	DUMP_FIELD(spu, "0x%x", slb_replace);
	DUMP_FIELD(spu, "%d", pid);
	DUMP_FIELD(spu, "0x%p", mm);
	DUMP_FIELD(spu, "0x%p", ctx);
	DUMP_FIELD(spu, "0x%p", rq);
	DUMP_FIELD(spu, "0x%p", timestamp);
	DUMP_FIELD(spu, "0x%lx", problem_phys);
	DUMP_FIELD(spu, "0x%p", problem);
3510 3511 3512 3513 3514 3515
	DUMP_VALUE("0x%x", problem->spu_runcntl_RW,
			in_be32(&spu->problem->spu_runcntl_RW));
	DUMP_VALUE("0x%x", problem->spu_status_R,
			in_be32(&spu->problem->spu_status_R));
	DUMP_VALUE("0x%x", problem->spu_npc_RW,
			in_be32(&spu->problem->spu_npc_RW));
3516
	DUMP_FIELD(spu, "0x%p", priv2);
3517
	DUMP_FIELD(spu, "0x%p", pdata);
3518 3519
}

3520 3521 3522 3523 3524 3525 3526
int
spu_inst_dump(unsigned long adr, long count, int praddr)
{
	return generic_inst_dump(adr, count, praddr, print_insn_spu);
}

static void dump_spu_ls(unsigned long num, int subcmd)
3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552
{
	unsigned long offset, addr, ls_addr;

	if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();
		ls_addr = (unsigned long)spu_info[num].spu->local_store;
		sync();
		__delay(200);
	} else {
		catch_memory_errors = 0;
		printf("*** Error: accessing spu info for spu %d\n", num);
		return;
	}
	catch_memory_errors = 0;

	if (scanhex(&offset))
		addr = ls_addr + offset;
	else
		addr = spu_info[num].dump_addr;

	if (addr >= ls_addr + LS_SIZE) {
		printf("*** Error: address outside of local store\n");
		return;
	}

3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563
	switch (subcmd) {
	case 'i':
		addr += spu_inst_dump(addr, 16, 1);
		last_cmd = "sdi\n";
		break;
	default:
		prdump(addr, 64);
		addr += 64;
		last_cmd = "sd\n";
		break;
	}
3564 3565 3566 3567

	spu_info[num].dump_addr = addr;
}

3568 3569
static int do_spu_cmd(void)
{
3570
	static unsigned long num = 0;
3571
	int cmd, subcmd = 0;
3572 3573 3574 3575 3576 3577 3578 3579 3580

	cmd = inchar();
	switch (cmd) {
	case 's':
		stop_spus();
		break;
	case 'r':
		restart_spus();
		break;
3581
	case 'd':
3582 3583 3584 3585
		subcmd = inchar();
		if (isxdigit(subcmd) || subcmd == '\n')
			termch = subcmd;
	case 'f':
3586 3587
		scanhex(&num);
		if (num >= XMON_NUM_SPUS || !spu_info[num].spu) {
3588
			printf("*** Error: invalid spu number\n");
3589 3590 3591 3592 3593 3594 3595 3596
			return 0;
		}

		switch (cmd) {
		case 'f':
			dump_spu_fields(spu_info[num].spu);
			break;
		default:
3597
			dump_spu_ls(num, subcmd);
3598 3599 3600
			break;
		}

3601
		break;
3602 3603 3604 3605 3606 3607
	default:
		return -1;
	}

	return 0;
}
3608
#else /* ! CONFIG_SPU_BASE */
3609 3610 3611 3612 3613
static int do_spu_cmd(void)
{
	return -1;
}
#endif