summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/xmon/xmon.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /arch/powerpc/xmon/xmon.c
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--arch/powerpc/xmon/xmon.c4311
1 files changed, 4311 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
new file mode 100644
index 000000000..3de2adc0a
--- /dev/null
+++ b/arch/powerpc/xmon/xmon.c
@@ -0,0 +1,4311 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Routines providing a simple monitor for use on the PowerMac.
+ *
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ * Copyright (C) 2001 PPC64 Team, IBM Corp
+ * Copyrignt (C) 2006 Michael Ellerman, IBM Corp
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sched/signal.h>
+#include <linux/smp.h>
+#include <linux/mm.h>
+#include <linux/reboot.h>
+#include <linux/delay.h>
+#include <linux/kallsyms.h>
+#include <linux/kmsg_dump.h>
+#include <linux/cpumask.h>
+#include <linux/export.h>
+#include <linux/sysrq.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+#include <linux/ctype.h>
+#include <linux/highmem.h>
+#include <linux/security.h>
+
+#include <asm/debugfs.h>
+#include <asm/ptrace.h>
+#include <asm/smp.h>
+#include <asm/string.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/xmon.h>
+#include <asm/processor.h>
+#include <asm/mmu.h>
+#include <asm/mmu_context.h>
+#include <asm/plpar_wrappers.h>
+#include <asm/cputable.h>
+#include <asm/rtas.h>
+#include <asm/sstep.h>
+#include <asm/irq_regs.h>
+#include <asm/spu.h>
+#include <asm/spu_priv1.h>
+#include <asm/setjmp.h>
+#include <asm/reg.h>
+#include <asm/debug.h>
+#include <asm/hw_breakpoint.h>
+#include <asm/xive.h>
+#include <asm/opal.h>
+#include <asm/firmware.h>
+#include <asm/code-patching.h>
+#include <asm/sections.h>
+#include <asm/inst.h>
+
+#ifdef CONFIG_PPC64
+#include <asm/hvcall.h>
+#include <asm/paca.h>
+#include <asm/lppaca.h>
+#endif
+
+#include "nonstdio.h"
+#include "dis-asm.h"
+#include "xmon_bpts.h"
+
+#ifdef CONFIG_SMP
+static cpumask_t cpus_in_xmon = CPU_MASK_NONE;
+static unsigned long xmon_taken = 1;
+static int xmon_owner;
+static int xmon_gate;
+#else
+#define xmon_owner 0
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_PPC_PSERIES
+static int set_indicator_token = RTAS_UNKNOWN_SERVICE;
+#endif
+static unsigned long in_xmon __read_mostly = 0;
+static int xmon_on = IS_ENABLED(CONFIG_XMON_DEFAULT);
+static bool xmon_is_ro = IS_ENABLED(CONFIG_XMON_DEFAULT_RO_MODE);
+
+static unsigned long adrs;
+static int size = 1;
+#define MAX_DUMP (64 * 1024)
+static unsigned long ndump = 64;
+#define MAX_IDUMP (MAX_DUMP >> 2)
+static unsigned long nidump = 16;
+static unsigned long ncsum = 4096;
+static int termch;
+static char tmpstr[128];
+static int tracing_enabled;
+
+static long bus_error_jmp[JMP_BUF_LEN];
+static int catch_memory_errors;
+static int catch_spr_faults;
+static long *xmon_fault_jmp[NR_CPUS];
+
+/* Breakpoint stuff */
+struct bpt {
+ unsigned long address;
+ struct ppc_inst *instr;
+ atomic_t ref_count;
+ int enabled;
+ unsigned long pad;
+};
+
+/* Bits in bpt.enabled */
+#define BP_CIABR 1
+#define BP_TRAP 2
+#define BP_DABR 4
+
+static struct bpt bpts[NBPTS];
+static struct bpt dabr[HBP_NUM_MAX];
+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 mread_instr(unsigned long, struct ppc_inst *);
+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 show_pte(unsigned long);
+static void prdump(unsigned long, long);
+static int ppc_inst_dump(unsigned long, long, int);
+static void dump_log_buf(void);
+
+#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
+
+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 *);
+static int read_spr(int, unsigned long *);
+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);
+static void proccall(void);
+static void show_tasks(void);
+void dump_segments(void);
+static void symbol_lookup(void);
+static void xmon_show_stack(unsigned long sp, unsigned long lr,
+ unsigned long pc);
+static void xmon_print_symbol(unsigned long address, const char *mid,
+ const char *after);
+static const char *getvecname(unsigned long vec);
+
+static int do_spu_cmd(void);
+
+#ifdef CONFIG_44x
+static void dump_tlb_44x(void);
+#endif
+#ifdef CONFIG_PPC_BOOK3E
+static void dump_tlb_book3e(void);
+#endif
+
+static void clear_all_bpt(void);
+
+#ifdef CONFIG_PPC64
+#define REG "%.16lx"
+#else
+#define REG "%.8lx"
+#endif
+
+#ifdef __LITTLE_ENDIAN__
+#define GETWORD(v) (((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0])
+#else
+#define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3])
+#endif
+
+static const char *xmon_ro_msg = "Operation disabled: xmon in read-only mode\n";
+
+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\
+ d1 dump 1 byte values\n\
+ d2 dump 2 byte values\n\
+ d4 dump 4 byte values\n\
+ d8 dump 8 byte values\n\
+ di dump instructions\n\
+ df dump float values\n\
+ dd dump double values\n\
+ dl dump the kernel log buffer\n"
+#ifdef CONFIG_PPC_POWERNV
+ "\
+ do dump the OPAL message log\n"
+#endif
+#ifdef CONFIG_PPC64
+ "\
+ dp[#] dump paca for current cpu, or cpu #\n\
+ dpa dump paca for all possible cpus\n"
+#endif
+ "\
+ dr dump stream of raw bytes\n\
+ dv dump virtual address translation \n\
+ dt dump the tracing buffers (uses printk)\n\
+ dtc dump the tracing buffers for current CPU (uses printk)\n\
+"
+#ifdef CONFIG_PPC_POWERNV
+" dx# dump xive on CPU #\n\
+ dxi# dump xive irq state #\n\
+ dxa dump xive on all CPUs\n"
+#endif
+" e print exception information\n\
+ f flush cache\n\
+ la lookup symbol+offset of specified address\n\
+ ls lookup address of specified symbol\n\
+ lp s [#] lookup address of percpu symbol s for current cpu, or cpu #\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\
+ p call a procedure\n\
+ P list processes/tasks\n\
+ r print registers\n\
+ s single step\n"
+#ifdef CONFIG_SPU_BASE
+" ss stop execution on all spus\n\
+ sr restore execution on stopped spus\n\
+ sf # dump spu fields for spu # (in hex)\n\
+ sd # dump spu local store for spu # (in hex)\n\
+ sdi # disassemble spu local store for spu # (in hex)\n"
+#endif
+" S print special registers\n\
+ Sa print all SPRs\n\
+ Sr # read SPR #\n\
+ Sw #v write v to SPR #\n\
+ t print backtrace\n\
+ x exit monitor and recover\n\
+ X exit monitor and don't recover\n"
+#if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E)
+" u dump segment table or SLB\n"
+#elif defined(CONFIG_PPC_BOOK3S_32)
+" u dump segment registers\n"
+#elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E)
+" u dump TLB\n"
+#endif
+" U show uptime information\n"
+" ? help\n"
+" # n limit output to n lines per page (for dp, dpa, dl)\n"
+" zr reboot\n"
+" zh halt\n"
+;
+
+#ifdef CONFIG_SECURITY
+static bool xmon_is_locked_down(void)
+{
+ static bool lockdown;
+
+ if (!lockdown) {
+ lockdown = !!security_locked_down(LOCKDOWN_XMON_RW);
+ if (lockdown) {
+ printf("xmon: Disabled due to kernel lockdown\n");
+ xmon_is_ro = true;
+ }
+ }
+
+ if (!xmon_is_ro) {
+ xmon_is_ro = !!security_locked_down(LOCKDOWN_XMON_WR);
+ if (xmon_is_ro)
+ printf("xmon: Read-only due to kernel lockdown\n");
+ }
+
+ return lockdown;
+}
+#else /* CONFIG_SECURITY */
+static inline bool xmon_is_locked_down(void)
+{
+ return false;
+}
+#endif
+
+static struct pt_regs *xmon_regs;
+
+static inline void sync(void)
+{
+ asm volatile("sync; isync");
+}
+
+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));
+}
+
+/**
+ * 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;
+ }
+ plpar_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);
+}
+
+/*
+ * 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;
+
+ /*
+ * 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.
+ */
+ if (set_indicator_token == RTAS_UNKNOWN_SERVICE)
+ return;
+
+ rtas_call_unlocked(&args, set_indicator_token, 3, 1, NULL,
+ SURVEILLANCE_TOKEN, 0, 0);
+
+#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;
+
+ for (;;) {
+ last_speaker = cmpxchg(&xmon_speaker, 0, me);
+ if (last_speaker == 0)
+ return;
+
+ /*
+ * Wait a full second for the lock, we might be on a slow
+ * console, but check every 100us.
+ */
+ timeout = 10000;
+ while (xmon_speaker == last_speaker) {
+ if (--timeout > 0) {
+ udelay(100);
+ continue;
+ }
+
+ /* hostile takeover */
+ prev = cmpxchg(&xmon_speaker, last_speaker, me);
+ if (prev == last_speaker)
+ return;
+ break;
+ }
+ }
+}
+
+static void release_output_lock(void)
+{
+ xmon_speaker = 0;
+}
+
+int cpus_are_in_xmon(void)
+{
+ return !cpumask_empty(&cpus_in_xmon);
+}
+
+static bool wait_for_other_cpus(int ncpus)
+{
+ unsigned long timeout;
+
+ /* We wait for 2s, which is a metric "little while" */
+ for (timeout = 20000; timeout != 0; --timeout) {
+ if (cpumask_weight(&cpus_in_xmon) >= ncpus)
+ return true;
+ udelay(100);
+ barrier();
+ }
+
+ return false;
+}
+#else /* CONFIG_SMP */
+static inline void get_output_lock(void) {}
+static inline void release_output_lock(void) {}
+#endif
+
+static inline int unrecoverable_excp(struct pt_regs *regs)
+{
+#if defined(CONFIG_4xx) || defined(CONFIG_PPC_BOOK3E)
+ /* We have no MSR_RI bit on 4xx or Book3e, so we simply return false */
+ return 0;
+#else
+ return ((regs->msr & MSR_RI) == 0);
+#endif
+}
+
+static void xmon_touch_watchdogs(void)
+{
+ touch_softlockup_watchdog_sync();
+ rcu_cpu_stall_reset();
+ touch_nmi_watchdog();
+}
+
+static int xmon_core(struct pt_regs *regs, int fromipi)
+{
+ int cmd = 0;
+ struct bpt *bp;
+ long recurse_jmp[JMP_BUF_LEN];
+ bool locked_down;
+ unsigned long offset;
+ unsigned long flags;
+#ifdef CONFIG_SMP
+ int cpu;
+ int secondary;
+#endif
+
+ local_irq_save(flags);
+ hard_irq_disable();
+
+ locked_down = xmon_is_locked_down();
+
+ if (!fromipi) {
+ tracing_enabled = tracing_is_on();
+ tracing_off();
+ }
+
+ 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();
+ if (cpumask_test_cpu(cpu, &cpus_in_xmon)) {
+ /*
+ * 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);
+ 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)));
+ release_output_lock();
+ longjmp(xmon_fault_jmp[cpu], 1);
+ }
+
+ if (setjmp(recurse_jmp) != 0) {
+ if (!in_xmon || !xmon_gate) {
+ get_output_lock();
+ printf("xmon: WARNING: bad recursive fault "
+ "on cpu 0x%x\n", cpu);
+ release_output_lock();
+ goto waiting;
+ }
+ secondary = !(xmon_taken && cpu == xmon_owner);
+ goto cmdloop;
+ }
+
+ xmon_fault_jmp[cpu] = recurse_jmp;
+
+ bp = NULL;
+ if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT))
+ bp = at_breakpoint(regs->nip);
+ if (bp || unrecoverable_excp(regs))
+ fromipi = 0;
+
+ if (!fromipi) {
+ get_output_lock();
+ if (!locked_down)
+ excprint(regs);
+ if (bp) {
+ printf("cpu 0x%x stopped at breakpoint 0x%tx (",
+ cpu, BP_NUM(bp));
+ xmon_print_symbol(regs->nip, " ", ")\n");
+ }
+ if (unrecoverable_excp(regs))
+ printf("WARNING: exception is not recoverable, "
+ "can't continue\n");
+ release_output_lock();
+ }
+
+ cpumask_set_cpu(cpu, &cpus_in_xmon);
+
+ waiting:
+ secondary = 1;
+ spin_begin();
+ while (secondary && !xmon_gate) {
+ if (in_xmon == 0) {
+ if (fromipi) {
+ spin_end();
+ goto leave;
+ }
+ secondary = test_and_set_bit(0, &in_xmon);
+ }
+ spin_cpu_relax();
+ touch_nmi_watchdog();
+ }
+ spin_end();
+
+ 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) {
+ /*
+ * A system reset (trap == 0x100) can be triggered on
+ * all CPUs, so when we come in via 0x100 try waiting
+ * for the other CPUs to come in before we send the
+ * debugger break (IPI). This is similar to
+ * crash_kexec_secondary().
+ */
+ if (TRAP(regs) != 0x100 || !wait_for_other_cpus(ncpus))
+ smp_send_debugger_break();
+
+ wait_for_other_cpus(ncpus);
+ }
+ remove_bpts();
+ disable_surveillance();
+
+ if (!locked_down) {
+ /* for breakpoint or single step, print curr insn */
+ if (bp || TRAP(regs) == 0xd00)
+ ppc_inst_dump(regs->nip, 1, 0);
+ printf("enter ? for help\n");
+ }
+
+ mb();
+ xmon_gate = 1;
+ barrier();
+ touch_nmi_watchdog();
+ }
+
+ cmdloop:
+ while (in_xmon) {
+ if (secondary) {
+ spin_begin();
+ if (cpu == xmon_owner) {
+ if (!test_and_set_bit(0, &xmon_taken)) {
+ secondary = 0;
+ spin_end();
+ continue;
+ }
+ /* missed it */
+ while (cpu == xmon_owner)
+ spin_cpu_relax();
+ }
+ spin_cpu_relax();
+ touch_nmi_watchdog();
+ } else {
+ if (!locked_down)
+ cmd = cmds(regs);
+ if (locked_down || cmd != 0) {
+ /* exiting xmon */
+ insert_bpts();
+ xmon_gate = 0;
+ wmb();
+ in_xmon = 0;
+ break;
+ }
+ /* have switched to some other cpu */
+ secondary = 1;
+ }
+ }
+ leave:
+ cpumask_clear_cpu(cpu, &cpus_in_xmon);
+ 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) {
+ printf("Stopped at breakpoint %tx (", BP_NUM(bp));
+ xmon_print_symbol(regs->nip, " ", ")\n");
+ }
+ if (unrecoverable_excp(regs))
+ printf("WARNING: exception is not recoverable, "
+ "can't continue\n");
+ remove_bpts();
+ disable_surveillance();
+ if (!locked_down) {
+ /* for breakpoint or single step, print current insn */
+ if (bp || TRAP(regs) == 0xd00)
+ ppc_inst_dump(regs->nip, 1, 0);
+ printf("enter ? for help\n");
+ }
+ }
+
+ if (!locked_down)
+ cmd = cmds(regs);
+
+ insert_bpts();
+ in_xmon = 0;
+#endif
+
+#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
+ if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) {
+ bp = at_breakpoint(regs->nip);
+ if (bp != NULL) {
+ int stepped = emulate_step(regs, ppc_inst_read(bp->instr));
+ 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(ppc_inst_read(bp->instr))? "rfid": "mtmsrd");
+ }
+ }
+ }
+#endif
+ if (locked_down)
+ clear_all_bpt();
+ else
+ insert_cpu_bpts();
+
+ xmon_touch_watchdogs();
+ local_irq_restore(flags);
+
+ return cmd != 'X' && cmd != EOF;
+}
+
+int xmon(struct pt_regs *excp)
+{
+ struct pt_regs regs;
+
+ if (excp == NULL) {
+ ppc_save_regs(&regs);
+ excp = &regs;
+ }
+
+ return xmon_core(excp, 0);
+}
+EXPORT_SYMBOL(xmon);
+
+irqreturn_t xmon_irq(int irq, void *d)
+{
+ unsigned long flags;
+ local_irq_save(flags);
+ printf("Keyboard interrupt\n");
+ xmon(get_irq_regs());
+ local_irq_restore(flags);
+ return IRQ_HANDLED;
+}
+
+static int xmon_bpt(struct pt_regs *regs)
+{
+ struct bpt *bp;
+ unsigned long offset;
+
+ if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
+ 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 || offset == 8)) {
+ regs->nip = bp->address + offset;
+ 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;
+}
+
+static int xmon_sstep(struct pt_regs *regs)
+{
+ if (user_mode(regs))
+ return 0;
+ xmon_core(regs, 0);
+ return 1;
+}
+
+static int xmon_break_match(struct pt_regs *regs)
+{
+ int i;
+
+ if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
+ return 0;
+ for (i = 0; i < nr_wp_slots(); i++) {
+ if (dabr[i].enabled)
+ goto found;
+ }
+ return 0;
+
+found:
+ xmon_core(regs, 0);
+ return 1;
+}
+
+static int xmon_iabr_match(struct pt_regs *regs)
+{
+ if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
+ return 0;
+ if (iabr == NULL)
+ return 0;
+ xmon_core(regs, 0);
+ return 1;
+}
+
+static int xmon_ipi(struct pt_regs *regs)
+{
+#ifdef CONFIG_SMP
+ if (in_xmon && !cpumask_test_cpu(smp_processor_id(), &cpus_in_xmon))
+ xmon_core(regs, 1);
+#endif
+ return 0;
+}
+
+static int xmon_fault_handler(struct pt_regs *regs)
+{
+ struct bpt *bp;
+ unsigned long offset;
+
+ if (in_xmon && catch_memory_errors)
+ handle_fault(regs); /* doesn't return */
+
+ if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) {
+ bp = in_breakpoint_table(regs->nip, &offset);
+ if (bp != NULL) {
+ regs->nip = bp->address + offset;
+ atomic_dec(&bp->ref_count);
+ }
+ }
+
+ return 0;
+}
+
+/* Force enable xmon if not already enabled */
+static inline void force_enable_xmon(void)
+{
+ /* Enable xmon hooks if needed */
+ if (!xmon_on) {
+ printf("xmon: Enabling debugger hooks\n");
+ xmon_on = 1;
+ }
+}
+
+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)bpt_table;
+ if (off >= sizeof(bpt_table))
+ return NULL;
+ *offp = off & (BPT_SIZE - 1);
+ if (off & 3)
+ return NULL;
+ return bpts + (off / BPT_SIZE);
+}
+
+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 = (void *)(bpt_table + ((bp - bpts) * BPT_WORDS));
+ return bp;
+ }
+ }
+
+ printf("Sorry, no free breakpoints. Please clear one first.\n");
+ return NULL;
+}
+
+static void insert_bpts(void)
+{
+ int i;
+ struct ppc_inst instr, instr2;
+ struct bpt *bp, *bp2;
+
+ bp = bpts;
+ for (i = 0; i < NBPTS; ++i, ++bp) {
+ if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0)
+ continue;
+ if (!mread_instr(bp->address, &instr)) {
+ printf("Couldn't read instruction at %lx, "
+ "disabling breakpoint there\n", bp->address);
+ bp->enabled = 0;
+ continue;
+ }
+ if (IS_MTMSRD(instr) || IS_RFID(instr)) {
+ printf("Breakpoint at %lx is on an mtmsrd or rfid "
+ "instruction, disabling it\n", bp->address);
+ bp->enabled = 0;
+ continue;
+ }
+ /*
+ * Check the address is not a suffix by looking for a prefix in
+ * front of it.
+ */
+ if (mread_instr(bp->address - 4, &instr2) == 8) {
+ printf("Breakpoint at %lx is on the second word of a prefixed instruction, disabling it\n",
+ bp->address);
+ bp->enabled = 0;
+ continue;
+ }
+ /*
+ * We might still be a suffix - if the prefix has already been
+ * replaced by a breakpoint we won't catch it with the above
+ * test.
+ */
+ bp2 = at_breakpoint(bp->address - 4);
+ if (bp2 && ppc_inst_prefixed(ppc_inst_read(bp2->instr))) {
+ printf("Breakpoint at %lx is on the second word of a prefixed instruction, disabling it\n",
+ bp->address);
+ bp->enabled = 0;
+ continue;
+ }
+
+ patch_instruction(bp->instr, instr);
+ patch_instruction(ppc_inst_next(bp->instr, &instr),
+ ppc_inst(bpinstr));
+ if (bp->enabled & BP_CIABR)
+ continue;
+ if (patch_instruction((struct ppc_inst *)bp->address,
+ ppc_inst(bpinstr)) != 0) {
+ printf("Couldn't write instruction at %lx, "
+ "disabling breakpoint there\n", bp->address);
+ bp->enabled &= ~BP_TRAP;
+ continue;
+ }
+ }
+}
+
+static void insert_cpu_bpts(void)
+{
+ int i;
+ struct arch_hw_breakpoint brk;
+
+ for (i = 0; i < nr_wp_slots(); i++) {
+ if (dabr[i].enabled) {
+ brk.address = dabr[i].address;
+ brk.type = (dabr[i].enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL;
+ brk.len = 8;
+ brk.hw_len = 8;
+ __set_breakpoint(i, &brk);
+ }
+ }
+
+ if (iabr)
+ set_ciabr(iabr->address);
+}
+
+static void remove_bpts(void)
+{
+ int i;
+ struct bpt *bp;
+ struct ppc_inst instr;
+
+ bp = bpts;
+ for (i = 0; i < NBPTS; ++i, ++bp) {
+ if ((bp->enabled & (BP_TRAP|BP_CIABR)) != BP_TRAP)
+ continue;
+ if (mread_instr(bp->address, &instr)
+ && ppc_inst_equal(instr, ppc_inst(bpinstr))
+ && patch_instruction(
+ (struct ppc_inst *)bp->address, ppc_inst_read(bp->instr)) != 0)
+ printf("Couldn't remove breakpoint at %lx\n",
+ bp->address);
+ }
+}
+
+static void remove_cpu_bpts(void)
+{
+ hw_breakpoint_disable();
+ write_ciabr(0);
+}
+
+/* Based on uptime_proc_show(). */
+static void
+show_uptime(void)
+{
+ struct timespec64 uptime;
+
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_memory_errors = 1;
+ sync();
+
+ ktime_get_coarse_boottime_ts64(&uptime);
+ printf("Uptime: %lu.%.2lu seconds\n", (unsigned long)uptime.tv_sec,
+ ((unsigned long)uptime.tv_nsec / (NSEC_PER_SEC/100)));
+
+ sync();
+ __delay(200); \
+ }
+ catch_memory_errors = 0;
+}
+
+static void set_lpp_cmd(void)
+{
+ unsigned long lpp;
+
+ if (!scanhex(&lpp)) {
+ printf("Invalid number.\n");
+ lpp = 0;
+ }
+ xmon_set_pagination_lpp(lpp);
+}
+/* Command interpreting routine */
+static char *last_cmd;
+
+static int
+cmds(struct pt_regs *excp)
+{
+ int cmd = 0;
+
+ last_cmd = NULL;
+ xmon_regs = excp;
+
+ xmon_show_stack(excp->gpr[1], excp->link, excp->nip);
+
+ 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':
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ break;
+ }
+ memzcan();
+ break;
+ case 'i':
+ show_mem(0, NULL);
+ 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':
+ if (do_spu_cmd() == 0)
+ break;
+ if (do_step(excp))
+ return cmd;
+ break;
+ case 'x':
+ case 'X':
+ if (tracing_enabled)
+ tracing_on();
+ return cmd;
+ case EOF:
+ printf(" <no input ...>\n");
+ mdelay(2000);
+ return cmd;
+ case '?':
+ xmon_puts(help_string);
+ break;
+ case '#':
+ set_lpp_cmd();
+ break;
+ case 'b':
+ bpt_cmds();
+ break;
+ case 'C':
+ csum();
+ break;
+ case 'c':
+ if (cpu_cmd())
+ return 0;
+ break;
+ case 'z':
+ bootcmds();
+ break;
+ case 'p':
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ break;
+ }
+ proccall();
+ break;
+ case 'P':
+ show_tasks();
+ break;
+#ifdef CONFIG_PPC_BOOK3S
+ case 'u':
+ dump_segments();
+ break;
+#elif defined(CONFIG_44x)
+ case 'u':
+ dump_tlb_44x();
+ break;
+#elif defined(CONFIG_PPC_BOOK3E)
+ case 'u':
+ dump_tlb_book3e();
+ break;
+#endif
+ case 'U':
+ show_uptime();
+ break;
+ default:
+ printf("Unrecognized command: ");
+ do {
+ if (' ' < cmd && cmd <= '~')
+ putchar(cmd);
+ else
+ printf("\\x%x", cmd);
+ cmd = inchar();
+ } while (cmd != '\n');
+ printf(" (type ? for help)\n");
+ break;
+ }
+ }
+}
+
+#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
+/*
+ * Step a single instruction.
+ * Some instructions we emulate, others we execute with MSR_SE set.
+ */
+static int do_step(struct pt_regs *regs)
+{
+ struct ppc_inst instr;
+ int stepped;
+
+ force_enable_xmon();
+ /* check we are in 64-bit kernel mode, translation enabled */
+ if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) {
+ if (mread_instr(regs->nip, &instr)) {
+ 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) {
+ set_trap(regs, 0xd00);
+ printf("stepped to ");
+ xmon_print_symbol(regs->nip, " ", "\n");
+ ppc_inst_dump(regs->nip, 1, 0);
+ return 0;
+ }
+ }
+ }
+ regs->msr |= MSR_SE;
+ return 1;
+}
+#endif
+
+static void bootcmds(void)
+{
+ char tmp[64];
+ int cmd;
+
+ cmd = inchar();
+ if (cmd == 'r') {
+ getstring(tmp, 64);
+ ppc_md.restart(tmp);
+ } else if (cmd == 'h') {
+ ppc_md.halt();
+ } else if (cmd == 'p') {
+ if (pm_power_off)
+ pm_power_off();
+ }
+}
+
+static int cpu_cmd(void)
+{
+#ifdef CONFIG_SMP
+ unsigned long cpu, first_cpu, last_cpu;
+ int timeout;
+
+ if (!scanhex(&cpu)) {
+ /* print cpus waiting or in xmon */
+ printf("cpus stopped:");
+ last_cpu = first_cpu = NR_CPUS;
+ for_each_possible_cpu(cpu) {
+ if (cpumask_test_cpu(cpu, &cpus_in_xmon)) {
+ if (cpu == last_cpu + 1) {
+ last_cpu = cpu;
+ } else {
+ if (last_cpu != first_cpu)
+ printf("-0x%lx", last_cpu);
+ last_cpu = first_cpu = cpu;
+ printf(" 0x%lx", cpu);
+ }
+ }
+ }
+ if (last_cpu != first_cpu)
+ printf("-0x%lx", last_cpu);
+ printf("\n");
+ return 0;
+ }
+ /* try to switch to cpu specified */
+ if (!cpumask_test_cpu(cpu, &cpus_in_xmon)) {
+ printf("cpu 0x%lx isn't in xmon\n", cpu);
+#ifdef CONFIG_PPC64
+ printf("backtrace of paca[0x%lx].saved_r1 (possibly stale):\n", cpu);
+ xmon_show_stack(paca_ptrs[cpu]->saved_r1, 0, 0);
+#endif
+ 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();
+ printf("cpu 0x%lx didn't take control\n", cpu);
+ 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) {
+ printf("csum stopped at "REG"\n", adrs+i);
+ 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)
+{
+ struct ppc_inst instr;
+
+ addr &= ~3;
+ if (!is_kernel_addr(addr)) {
+ printf("Breakpoints may only be placed at kernel addresses\n");
+ return 0;
+ }
+ if (!mread_instr(addr, &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;
+}
+
+static int find_free_data_bpt(void)
+{
+ int i;
+
+ for (i = 0; i < nr_wp_slots(); i++) {
+ if (!dabr[i].enabled)
+ return i;
+ }
+ printf("Couldn't find free breakpoint register\n");
+ return -1;
+}
+
+static void print_data_bpts(void)
+{
+ int i;
+
+ for (i = 0; i < nr_wp_slots(); i++) {
+ if (!dabr[i].enabled)
+ continue;
+
+ printf(" data "REG" [", dabr[i].address);
+ if (dabr[i].enabled & 1)
+ printf("r");
+ if (dabr[i].enabled & 2)
+ printf("w");
+ printf("]\n");
+ }
+}
+
+static char *breakpoint_help_string =
+ "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"
+ "bi <addr> [cnt] set hardware instr breakpoint (POWER8 only)\n"
+ "bd <addr> [cnt] set hardware data breakpoint\n"
+ "";
+
+static void
+bpt_cmds(void)
+{
+ int cmd;
+ unsigned long a;
+ int i;
+ struct bpt *bp;
+
+ cmd = inchar();
+
+ switch (cmd) {
+ case 'd': { /* bd - hardware data breakpoint */
+ static const char badaddr[] = "Only kernel addresses are permitted for breakpoints\n";
+ int mode;
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ break;
+ }
+ if (!ppc_breakpoint_available()) {
+ printf("Hardware data breakpoint not supported on this cpu\n");
+ break;
+ }
+ i = find_free_data_bpt();
+ if (i < 0)
+ break;
+ mode = 7;
+ cmd = inchar();
+ if (cmd == 'r')
+ mode = 5;
+ else if (cmd == 'w')
+ mode = 6;
+ else
+ termch = cmd;
+ dabr[i].address = 0;
+ dabr[i].enabled = 0;
+ if (scanhex(&dabr[i].address)) {
+ if (!is_kernel_addr(dabr[i].address)) {
+ printf(badaddr);
+ break;
+ }
+ dabr[i].address &= ~HW_BRK_TYPE_DABR;
+ dabr[i].enabled = mode | BP_DABR;
+ }
+
+ force_enable_xmon();
+ break;
+ }
+
+ case 'i': /* bi - hardware instr breakpoint */
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ break;
+ }
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S)) {
+ printf("Hardware instruction breakpoint "
+ "not supported on this cpu\n");
+ break;
+ }
+ if (iabr) {
+ iabr->enabled &= ~BP_CIABR;
+ iabr = NULL;
+ }
+ if (!scanhex(&a))
+ break;
+ if (!check_bp_loc(a))
+ break;
+ bp = new_breakpoint(a);
+ if (bp != NULL) {
+ bp->enabled |= BP_CIABR;
+ iabr = bp;
+ force_enable_xmon();
+ }
+ break;
+
+ case 'c':
+ if (!scanhex(&a)) {
+ /* clear all breakpoints */
+ for (i = 0; i < NBPTS; ++i)
+ bpts[i].enabled = 0;
+ iabr = NULL;
+ for (i = 0; i < nr_wp_slots(); i++)
+ dabr[i].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);
+ if (bp == NULL) {
+ printf("No breakpoint at %lx\n", a);
+ break;
+ }
+ }
+
+ printf("Cleared breakpoint %tx (", BP_NUM(bp));
+ xmon_print_symbol(bp->address, " ", ")\n");
+ bp->enabled = 0;
+ break;
+
+ default:
+ termch = cmd;
+ cmd = skipbl();
+ if (cmd == '?') {
+ printf(breakpoint_help_string);
+ break;
+ }
+ termch = cmd;
+
+ if (xmon_is_ro || !scanhex(&a)) {
+ /* print all breakpoints */
+ printf(" type address\n");
+ print_data_bpts();
+ for (bp = bpts; bp < &bpts[NBPTS]; ++bp) {
+ if (!bp->enabled)
+ continue;
+ printf("%tx %s ", BP_NUM(bp),
+ (bp->enabled & BP_CIABR) ? "inst": "trap");
+ xmon_print_symbol(bp->address, " ", "\n");
+ }
+ break;
+ }
+
+ if (!check_bp_loc(a))
+ break;
+ bp = new_breakpoint(a);
+ if (bp != NULL) {
+ bp->enabled |= BP_TRAP;
+ force_enable_xmon();
+ }
+ 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:
+ if (radix_enabled())
+ ret = "(Data Access Out of Range)";
+ else
+ ret = "(Data SLB Access)";
+ break;
+ case 0x400: ret = "(Instruction Access)"; break;
+ case 0x480:
+ if (radix_enabled())
+ ret = "(Instruction Access Out of Range)";
+ else
+ 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;
+ case 0x980: ret = "(Hypervisor Decrementer)"; break;
+ case 0xa00: ret = "(Doorbell)"; break;
+ case 0xc00: ret = "(System Call)"; break;
+ case 0xd00: ret = "(Single Step)"; break;
+ case 0xe40: ret = "(Emulation Assist)"; break;
+ case 0xe60: ret = "(HMI)"; break;
+ case 0xe80: ret = "(Hypervisor Doorbell)"; break;
+ case 0xf00: ret = "(Performance Monitor)"; break;
+ case 0xf20: ret = "(Altivec Unavailable)"; break;
+ case 0x1300: ret = "(Instruction Breakpoint)"; break;
+ case 0x1500: ret = "(Denormalisation)"; break;
+ case 0x1700: ret = "(Altivec Assist)"; break;
+ case 0x3000: ret = "(System Call Vectored)"; break;
+ 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();
+ name = kallsyms_lookup(pc, &size, &offset, NULL, tmpstr);
+ if (name != NULL) {
+ *startp = pc - offset;
+ *endp = pc - offset + size;
+ }
+ sync();
+ }
+ catch_memory_errors = 0;
+}
+
+#define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long))
+#define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long))
+
+static void xmon_show_stack(unsigned long sp, unsigned long lr,
+ unsigned long pc)
+{
+ int max_to_print = 64;
+ unsigned long ip;
+ unsigned long newsp;
+ unsigned long marker;
+ struct pt_regs regs;
+
+ while (max_to_print--) {
+ if (!is_kernel_addr(sp)) {
+ if (sp != 0)
+ printf("SP (%lx) is in userspace\n", sp);
+ break;
+ }
+
+ if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long))
+ || !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)
+ mread(newsp + LRSAVE_OFFSET, &nextip,
+ sizeof(unsigned long));
+ if (lr == ip) {
+ if (!is_kernel_addr(lr)
+ || (fnstart <= lr && lr < fnend))
+ printip = 0;
+ } else if (lr == nextip) {
+ printip = 0;
+ } else if (is_kernel_addr(lr)
+ && !(fnstart <= lr && lr < fnend)) {
+ printf("[link register ] ");
+ xmon_print_symbol(lr, " ", "\n");
+ }
+ if (printip) {
+ printf("["REG"] ", sp);
+ xmon_print_symbol(ip, " ", " (unreliable)\n");
+ }
+ pc = lr = 0;
+
+ } else {
+ printf("["REG"] ", sp);
+ xmon_print_symbol(ip, " ", "\n");
+ }
+
+ /* Look for "regshere" marker to see if this is
+ an exception frame. */
+ if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
+ && marker == STACK_FRAME_REGS_MARKER) {
+ if (mread(sp + STACK_FRAME_OVERHEAD, &regs, sizeof(regs))
+ != sizeof(regs)) {
+ printf("Couldn't read registers at %lx\n",
+ sp + STACK_FRAME_OVERHEAD);
+ break;
+ }
+ printf("--- Exception: %lx %s at ", regs.trap,
+ getvecname(TRAP(&regs)));
+ pc = regs.nip;
+ lr = regs.link;
+ xmon_print_symbol(pc, " ", "\n");
+ }
+
+ if (newsp == 0)
+ break;
+
+ sp = newsp;
+ }
+}
+
+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)
+{
+#ifdef CONFIG_BUG
+ const struct bug_entry *bug;
+ unsigned long addr;
+
+ if (regs->msr & MSR_PR)
+ return; /* not in kernel */
+ addr = regs->nip; /* address of trap instruction */
+ if (!is_kernel_addr(addr))
+ return;
+ bug = find_bug(regs->nip);
+ if (bug == NULL)
+ return;
+ if (is_warning_bug(bug))
+ return;
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+ printf("kernel BUG at %s:%u!\n",
+ bug->file, bug->line);
+#else
+ printf("kernel BUG at %px!\n", (void *)bug->bug_addr);
+#endif
+#endif /* CONFIG_BUG */
+}
+
+static void excprint(struct pt_regs *fp)
+{
+ unsigned long trap;
+
+#ifdef CONFIG_SMP
+ printf("cpu 0x%x: ", smp_processor_id());
+#endif /* CONFIG_SMP */
+
+ trap = TRAP(fp);
+ printf("Vector: %lx %s at [%px]\n", fp->trap, getvecname(trap), fp);
+ printf(" pc: ");
+ xmon_print_symbol(fp->nip, ": ", "\n");
+
+ printf(" lr: ");
+ xmon_print_symbol(fp->link, ": ", "\n");
+
+ printf(" sp: %lx\n", fp->gpr[1]);
+ printf(" msr: %lx\n", fp->msr);
+
+ if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) {
+ printf(" dar: %lx\n", fp->dar);
+ if (trap != 0x380)
+ printf(" dsisr: %lx\n", fp->dsisr);
+ }
+
+ printf(" current = 0x%px\n", current);
+#ifdef CONFIG_PPC64
+ printf(" paca = 0x%px\t irqmask: 0x%02x\t irq_happened: 0x%02x\n",
+ local_paca, local_paca->irq_soft_mask, local_paca->irq_happened);
+#endif
+ if (current) {
+ printf(" pid = %d, comm = %s\n",
+ current->pid, current->comm);
+ }
+
+ if (trap == 0x700)
+ print_bug_trap(fp);
+
+ printf(linux_banner);
+}
+
+static void prregs(struct pt_regs *fp)
+{
+ int n, trap;
+ 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;
+ printf("*** Error reading registers from "REG"\n",
+ base);
+ return;
+ }
+ catch_memory_errors = 0;
+ fp = &regs;
+ }
+
+#ifdef CONFIG_PPC64
+ if (FULL_REGS(fp)) {
+ for (n = 0; n < 16; ++n)
+ printf("R%.2d = "REG" R%.2d = "REG"\n",
+ n, fp->gpr[n], n+16, fp->gpr[n+16]);
+ } else {
+ for (n = 0; n < 7; ++n)
+ printf("R%.2d = "REG" R%.2d = "REG"\n",
+ n, fp->gpr[n], n+7, fp->gpr[n+7]);
+ }
+#else
+ for (n = 0; n < 32; ++n) {
+ printf("R%.2d = %.8lx%s", n, fp->gpr[n],
+ (n & 3) == 3? "\n": " ");
+ if (n == 12 && !FULL_REGS(fp)) {
+ printf("\n");
+ break;
+ }
+ }
+#endif
+ printf("pc = ");
+ xmon_print_symbol(fp->nip, " ", "\n");
+ if (!trap_is_syscall(fp) && cpu_has_feature(CPU_FTR_CFAR)) {
+ printf("cfar= ");
+ xmon_print_symbol(fp->orig_gpr3, " ", "\n");
+ }
+ printf("lr = ");
+ xmon_print_symbol(fp->link, " ", "\n");
+ printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr);
+ printf("ctr = "REG" xer = "REG" trap = %4lx\n",
+ fp->ctr, fp->xer, fp->trap);
+ trap = TRAP(fp);
+ if (trap == 0x300 || trap == 0x380 || trap == 0x600)
+ printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr);
+}
+
+static void cacheflush(void)
+{
+ 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' || IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
+ 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;
+}
+
+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)
+{
+ unsigned long ret = -1UL;
+ int ok = 0;
+
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_spr_faults = 1;
+ sync();
+
+ ret = xmon_mfspr(n, *vp);
+
+ sync();
+ *vp = ret;
+ ok = 1;
+ }
+ catch_spr_faults = 0;
+
+ return ok;
+}
+
+static void
+write_spr(int n, unsigned long val)
+{
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ return;
+ }
+
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_spr_faults = 1;
+ sync();
+
+ xmon_mtspr(n, val);
+
+ sync();
+ } else {
+ printf("SPR 0x%03x (%4d) Faulted during write\n", n, n);
+ }
+ catch_spr_faults = 0;
+}
+
+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 = %.16lx srr1 = %.16lx dsisr = %.8lx\n",
+ mfspr(SPRN_SRR0), mfspr(SPRN_SRR1), mfspr(SPRN_DSISR));
+ printf("dscr = %.16lx ppr = %.16lx pir = %.8lx\n",
+ mfspr(SPRN_DSCR), mfspr(SPRN_PPR), mfspr(SPRN_PIR));
+ printf("amr = %.16lx uamor = %.16lx\n",
+ mfspr(SPRN_AMR), mfspr(SPRN_UAMOR));
+
+ if (!(mfmsr() & MSR_HV))
+ return;
+
+ printf("sdr1 = %.16lx hdar = %.16lx hdsisr = %.8lx\n",
+ mfspr(SPRN_SDR1), mfspr(SPRN_HDAR), mfspr(SPRN_HDSISR));
+ printf("hsrr0 = %.16lx hsrr1 = %.16lx hdec = %.16lx\n",
+ mfspr(SPRN_HSRR0), mfspr(SPRN_HSRR1), mfspr(SPRN_HDEC));
+ printf("lpcr = %.16lx pcr = %.16lx lpidr = %.8lx\n",
+ mfspr(SPRN_LPCR), mfspr(SPRN_PCR), mfspr(SPRN_LPID));
+ printf("hsprg0 = %.16lx hsprg1 = %.16lx amor = %.16lx\n",
+ mfspr(SPRN_HSPRG0), mfspr(SPRN_HSPRG1), mfspr(SPRN_AMOR));
+ printf("dabr = %.16lx dabrx = %.16lx\n",
+ mfspr(SPRN_DABR), mfspr(SPRN_DABRX));
+#endif
+}
+
+static void dump_207_sprs(void)
+{
+#ifdef CONFIG_PPC64
+ unsigned long msr;
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_207S))
+ return;
+
+ printf("dpdes = %.16lx tir = %.16lx cir = %.8lx\n",
+ mfspr(SPRN_DPDES), mfspr(SPRN_TIR), mfspr(SPRN_CIR));
+
+ printf("fscr = %.16lx tar = %.16lx pspb = %.8lx\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 = %.16lx tfiar = %.16lx texasr = %.16lx\n",
+ mfspr(SPRN_TFHAR), mfspr(SPRN_TFIAR),
+ mfspr(SPRN_TEXASR));
+ }
+
+ printf("mmcr0 = %.16lx mmcr1 = %.16lx mmcr2 = %.16lx\n",
+ mfspr(SPRN_MMCR0), mfspr(SPRN_MMCR1), mfspr(SPRN_MMCR2));
+ printf("pmc1 = %.8lx pmc2 = %.8lx pmc3 = %.8lx pmc4 = %.8lx\n",
+ mfspr(SPRN_PMC1), mfspr(SPRN_PMC2),
+ mfspr(SPRN_PMC3), mfspr(SPRN_PMC4));
+ printf("mmcra = %.16lx siar = %.16lx pmc5 = %.8lx\n",
+ mfspr(SPRN_MMCRA), mfspr(SPRN_SIAR), mfspr(SPRN_PMC5));
+ printf("sdar = %.16lx sier = %.16lx pmc6 = %.8lx\n",
+ mfspr(SPRN_SDAR), mfspr(SPRN_SIER), mfspr(SPRN_PMC6));
+ printf("ebbhr = %.16lx ebbrr = %.16lx bescr = %.16lx\n",
+ mfspr(SPRN_EBBHR), mfspr(SPRN_EBBRR), mfspr(SPRN_BESCR));
+ printf("iamr = %.16lx\n", mfspr(SPRN_IAMR));
+
+ if (!(msr & MSR_HV))
+ return;
+
+ printf("hfscr = %.16lx dhdes = %.16lx rpr = %.16lx\n",
+ mfspr(SPRN_HFSCR), mfspr(SPRN_DHDES), mfspr(SPRN_RPR));
+ printf("dawr0 = %.16lx dawrx0 = %.16lx\n",
+ mfspr(SPRN_DAWR0), mfspr(SPRN_DAWRX0));
+ if (nr_wp_slots() > 1) {
+ printf("dawr1 = %.16lx dawrx1 = %.16lx\n",
+ mfspr(SPRN_DAWR1), mfspr(SPRN_DAWRX1));
+ }
+ printf("ciabr = %.16lx\n", mfspr(SPRN_CIABR));
+#endif
+}
+
+static void dump_300_sprs(void)
+{
+#ifdef CONFIG_PPC64
+ bool hv = mfmsr() & MSR_HV;
+
+ if (!cpu_has_feature(CPU_FTR_ARCH_300))
+ return;
+
+ printf("pidr = %.16lx tidr = %.16lx\n",
+ mfspr(SPRN_PID), mfspr(SPRN_TIDR));
+ printf("psscr = %.16lx\n",
+ hv ? mfspr(SPRN_PSSCR) : mfspr(SPRN_PSSCR_PR));
+
+ if (!hv)
+ return;
+
+ printf("ptcr = %.16lx asdr = %.16lx\n",
+ mfspr(SPRN_PTCR), mfspr(SPRN_ASDR));
+#endif
+}
+
+static void dump_310_sprs(void)
+{
+#ifdef CONFIG_PPC64
+ if (!cpu_has_feature(CPU_FTR_ARCH_31))
+ return;
+
+ printf("mmcr3 = %.16lx, sier2 = %.16lx, sier3 = %.16lx\n",
+ mfspr(SPRN_MMCR3), mfspr(SPRN_SIER2), mfspr(SPRN_SIER3));
+
+#endif
+}
+
+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);
+}
+
+static void super_regs(void)
+{
+ static unsigned long regno;
+ int cmd;
+ int spr;
+
+ cmd = skipbl();
+
+ switch (cmd) {
+ case '\n': {
+ unsigned long sp, toc;
+ asm("mr %0,1" : "=r" (sp) :);
+ asm("mr %0,2" : "=r" (toc) :);
+
+ printf("msr = "REG" sprg0 = "REG"\n",
+ mfmsr(), mfspr(SPRN_SPRG0));
+ printf("pvr = "REG" sprg1 = "REG"\n",
+ mfspr(SPRN_PVR), mfspr(SPRN_SPRG1));
+ printf("dec = "REG" sprg2 = "REG"\n",
+ mfspr(SPRN_DEC), mfspr(SPRN_SPRG2));
+ printf("sp = "REG" sprg3 = "REG"\n", sp, mfspr(SPRN_SPRG3));
+ printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR));
+
+ dump_206_sprs();
+ dump_207_sprs();
+ dump_300_sprs();
+ dump_310_sprs();
+
+ return;
+ }
+ case 'w': {
+ unsigned long val;
+ scanhex(&regno);
+ val = 0;
+ read_spr(regno, &val);
+ scanhex(&val);
+ write_spr(regno, val);
+ dump_one_spr(regno, true);
+ break;
+ }
+ case 'r':
+ scanhex(&regno);
+ dump_one_spr(regno, true);
+ break;
+ case 'a':
+ /* dump ALL SPRs */
+ for (spr = 1; spr < 1024; ++spr)
+ dump_one_spr(spr, false);
+ break;
+ }
+
+ scannl();
+}
+
+/*
+ * Stuff for reading and writing memory safely
+ */
+static int
+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:
+ *(u16 *)q = *(u16 *)p;
+ break;
+ case 4:
+ *(u32 *)q = *(u32 *)p;
+ break;
+ case 8:
+ *(u64 *)q = *(u64 *)p;
+ 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;
+}
+
+static int
+mwrite(unsigned long adrs, void *buf, int size)
+{
+ volatile int n;
+ char *p, *q;
+
+ n = 0;
+
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ return n;
+ }
+
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_memory_errors = 1;
+ sync();
+ p = (char *) adrs;
+ q = (char *) buf;
+ switch (size) {
+ case 2:
+ *(u16 *)p = *(u16 *)q;
+ break;
+ case 4:
+ *(u32 *)p = *(u32 *)q;
+ break;
+ case 8:
+ *(u64 *)p = *(u64 *)q;
+ 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 {
+ printf("*** Error writing address "REG"\n", adrs + n);
+ }
+ catch_memory_errors = 0;
+ return n;
+}
+
+static int
+mread_instr(unsigned long adrs, struct ppc_inst *instr)
+{
+ volatile int n;
+
+ n = 0;
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_memory_errors = 1;
+ sync();
+ *instr = ppc_inst_read((struct ppc_inst *)adrs);
+ sync();
+ /* wait a little while to see if we get a machine check */
+ __delay(200);
+ n = ppc_inst_len(*instr);
+ }
+ catch_memory_errors = 0;
+ return n;
+}
+
+static int fault_type;
+static int fault_except;
+static char *fault_chars[] = { "--", "**", "##" };
+
+static int handle_fault(struct pt_regs *regs)
+{
+ fault_except = TRAP(regs);
+ 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))
+
+static void
+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;
+
+static char *memex_help_string =
+ "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"
+ "";
+
+static char *memex_subcmd_help_string =
+ "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"
+ "";
+
+static void
+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);
+ printf(REG"%c", adrs, brev? 'r': ' ');
+ 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;
+ }
+}
+
+static int
+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;
+}
+
+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");
+}
+
+static void dump_tracing(void)
+{
+ int c;
+
+ c = inchar();
+ if (c == 'c')
+ ftrace_dump(DUMP_ORIG);
+ else
+ ftrace_dump(DUMP_ALL);
+}
+
+#ifdef CONFIG_PPC64
+static void dump_one_paca(int cpu)
+{
+ struct paca_struct *p;
+#ifdef CONFIG_PPC_BOOK3S_64
+ int i = 0;
+#endif
+
+ if (setjmp(bus_error_jmp) != 0) {
+ printf("*** Error dumping paca for cpu 0x%x!\n", cpu);
+ return;
+ }
+
+ catch_memory_errors = 1;
+ sync();
+
+ p = paca_ptrs[cpu];
+
+ printf("paca for cpu 0x%x @ %px:\n", cpu, p);
+
+ printf(" %-*s = %s\n", 25, "possible", cpu_possible(cpu) ? "yes" : "no");
+ printf(" %-*s = %s\n", 25, "present", cpu_present(cpu) ? "yes" : "no");
+ printf(" %-*s = %s\n", 25, "online", cpu_online(cpu) ? "yes" : "no");
+
+#define DUMP(paca, name, format) \
+ printf(" %-*s = "format"\t(0x%lx)\n", 25, #name, 18, paca->name, \
+ offsetof(struct paca_struct, name));
+
+ DUMP(p, lock_token, "%#-*x");
+ DUMP(p, paca_index, "%#-*x");
+ DUMP(p, kernel_toc, "%#-*llx");
+ DUMP(p, kernelbase, "%#-*llx");
+ DUMP(p, kernel_msr, "%#-*llx");
+ DUMP(p, emergency_sp, "%-*px");
+#ifdef CONFIG_PPC_BOOK3S_64
+ DUMP(p, nmi_emergency_sp, "%-*px");
+ DUMP(p, mc_emergency_sp, "%-*px");
+ DUMP(p, in_nmi, "%#-*x");
+ DUMP(p, in_mce, "%#-*x");
+ DUMP(p, hmi_event_available, "%#-*x");
+#endif
+ DUMP(p, data_offset, "%#-*llx");
+ DUMP(p, hw_cpu_id, "%#-*x");
+ DUMP(p, cpu_start, "%#-*x");
+ DUMP(p, kexec_state, "%#-*x");
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (!early_radix_enabled()) {
+ 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(" %-*s[%d] = 0x%016llx 0x%016llx\n",
+ 22, "slb_shadow", i, esid, vsid);
+ }
+ }
+ DUMP(p, vmalloc_sllp, "%#-*x");
+ DUMP(p, stab_rr, "%#-*x");
+ DUMP(p, slb_used_bitmap, "%#-*x");
+ DUMP(p, slb_kern_bitmap, "%#-*x");
+
+ if (!early_cpu_has_feature(CPU_FTR_ARCH_300)) {
+ DUMP(p, slb_cache_ptr, "%#-*x");
+ for (i = 0; i < SLB_CACHE_ENTRIES; i++)
+ printf(" %-*s[%d] = 0x%016x\n",
+ 22, "slb_cache", i, p->slb_cache[i]);
+ }
+ }
+
+ DUMP(p, rfi_flush_fallback_area, "%-*px");
+#endif
+ DUMP(p, dscr_default, "%#-*llx");
+#ifdef CONFIG_PPC_BOOK3E
+ DUMP(p, pgd, "%-*px");
+ DUMP(p, kernel_pgd, "%-*px");
+ DUMP(p, tcd_ptr, "%-*px");
+ DUMP(p, mc_kstack, "%-*px");
+ DUMP(p, crit_kstack, "%-*px");
+ DUMP(p, dbg_kstack, "%-*px");
+#endif
+ DUMP(p, __current, "%-*px");
+ DUMP(p, kstack, "%#-*llx");
+ printf(" %-*s = 0x%016llx\n", 25, "kstack_base", p->kstack & ~(THREAD_SIZE - 1));
+#ifdef CONFIG_STACKPROTECTOR
+ DUMP(p, canary, "%#-*lx");
+#endif
+ DUMP(p, saved_r1, "%#-*llx");
+#ifdef CONFIG_PPC_BOOK3E
+ DUMP(p, trap_save, "%#-*x");
+#endif
+ DUMP(p, irq_soft_mask, "%#-*x");
+ DUMP(p, irq_happened, "%#-*x");
+#ifdef CONFIG_MMIOWB
+ DUMP(p, mmiowb_state.nesting_count, "%#-*x");
+ DUMP(p, mmiowb_state.mmiowb_pending, "%#-*x");
+#endif
+ DUMP(p, irq_work_pending, "%#-*x");
+ DUMP(p, sprg_vdso, "%#-*llx");
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ DUMP(p, tm_scratch, "%#-*llx");
+#endif
+
+#ifdef CONFIG_PPC_POWERNV
+ DUMP(p, idle_state, "%#-*lx");
+ if (!early_cpu_has_feature(CPU_FTR_ARCH_300)) {
+ DUMP(p, thread_idle_state, "%#-*x");
+ DUMP(p, subcore_sibling_mask, "%#-*x");
+ } else {
+#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
+ DUMP(p, requested_psscr, "%#-*llx");
+ DUMP(p, dont_stop.counter, "%#-*x");
+#endif
+ }
+#endif
+
+ DUMP(p, accounting.utime, "%#-*lx");
+ DUMP(p, accounting.stime, "%#-*lx");
+#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
+ DUMP(p, accounting.utime_scaled, "%#-*lx");
+#endif
+ DUMP(p, accounting.starttime, "%#-*lx");
+ DUMP(p, accounting.starttime_user, "%#-*lx");
+#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
+ DUMP(p, accounting.startspurr, "%#-*lx");
+ DUMP(p, accounting.utime_sspurr, "%#-*lx");
+#endif
+ DUMP(p, accounting.steal_time, "%#-*lx");
+#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
+
+#ifdef CONFIG_PPC_POWERNV
+static void dump_one_xive(int cpu)
+{
+ unsigned int hwid = get_hard_smp_processor_id(cpu);
+ bool hv = cpu_has_feature(CPU_FTR_HVMODE);
+
+ if (hv) {
+ opal_xive_dump(XIVE_DUMP_TM_HYP, hwid);
+ opal_xive_dump(XIVE_DUMP_TM_POOL, hwid);
+ opal_xive_dump(XIVE_DUMP_TM_OS, hwid);
+ opal_xive_dump(XIVE_DUMP_TM_USER, hwid);
+ opal_xive_dump(XIVE_DUMP_VP, hwid);
+ opal_xive_dump(XIVE_DUMP_EMU_STATE, hwid);
+ }
+
+ if (setjmp(bus_error_jmp) != 0) {
+ catch_memory_errors = 0;
+ printf("*** Error dumping xive on cpu %d\n", cpu);
+ return;
+ }
+
+ catch_memory_errors = 1;
+ sync();
+ xmon_xive_do_dump(cpu);
+ sync();
+ __delay(200);
+ catch_memory_errors = 0;
+}
+
+static void dump_all_xives(void)
+{
+ int cpu;
+
+ if (num_possible_cpus() == 0) {
+ printf("No possible cpus, use 'dx #' to dump individual cpus\n");
+ return;
+ }
+
+ for_each_possible_cpu(cpu)
+ dump_one_xive(cpu);
+}
+
+static void dump_one_xive_irq(u32 num, struct irq_data *d)
+{
+ xmon_xive_get_irq_config(num, d);
+}
+
+static void dump_all_xive_irq(void)
+{
+ unsigned int i;
+ struct irq_desc *desc;
+
+ for_each_irq_desc(i, desc) {
+ struct irq_data *d = irq_desc_get_irq_data(desc);
+ unsigned int hwirq;
+
+ if (!d)
+ continue;
+
+ hwirq = (unsigned int)irqd_to_hwirq(d);
+ /* IPIs are special (HW number 0) */
+ if (hwirq)
+ dump_one_xive_irq(hwirq, d);
+ }
+}
+
+static void dump_xives(void)
+{
+ unsigned long num;
+ int c;
+
+ if (!xive_enabled()) {
+ printf("Xive disabled on this system\n");
+ return;
+ }
+
+ c = inchar();
+ if (c == 'a') {
+ dump_all_xives();
+ return;
+ } else if (c == 'i') {
+ if (scanhex(&num))
+ dump_one_xive_irq(num, NULL);
+ else
+ dump_all_xive_irq();
+ return;
+ }
+
+ termch = c; /* Put c back, it wasn't 'a' */
+
+ if (scanhex(&num))
+ dump_one_xive(num);
+ else
+ dump_one_xive(xmon_owner);
+}
+#endif /* CONFIG_PPC_POWERNV */
+
+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*llx", size * 2, val);
+ }
+ printf(" |");
+ for (j = 0; j < 16; ++j) {
+ val = temp[j];
+ putchar(' ' <= val && val <= '~' ? val : '.');
+ }
+ printf("|\n");
+ }
+}
+
+static void
+dump(void)
+{
+ static char last[] = { "d?\n" };
+ int c;
+
+ c = inchar();
+
+#ifdef CONFIG_PPC64
+ if (c == 'p') {
+ xmon_start_pagination();
+ dump_pacas();
+ xmon_end_pagination();
+ return;
+ }
+#endif
+#ifdef CONFIG_PPC_POWERNV
+ if (c == 'x') {
+ xmon_start_pagination();
+ dump_xives();
+ xmon_end_pagination();
+ return;
+ }
+#endif
+
+ if (c == 't') {
+ dump_tracing();
+ return;
+ }
+
+ if (c == '\n')
+ termch = c;
+
+ scanhex((void *)&adrs);
+ if (termch != '\n')
+ termch = 0;
+ if (c == 'i') {
+ scanhex(&nidump);
+ if (nidump == 0)
+ nidump = 16;
+ else if (nidump > MAX_IDUMP)
+ nidump = MAX_IDUMP;
+ adrs += ppc_inst_dump(adrs, nidump, 1);
+ last_cmd = "di\n";
+ } else if (c == 'l') {
+ dump_log_buf();
+ } else if (c == 'o') {
+ dump_opal_msglog();
+ } else if (c == 'v') {
+ /* dump virtual to physical translation */
+ show_pte(adrs);
+ } else if (c == 'r') {
+ scanhex(&ndump);
+ if (ndump == 0)
+ ndump = 64;
+ xmon_rawdump(adrs, ndump);
+ adrs += ndump;
+ last_cmd = "dr\n";
+ } else {
+ scanhex(&ndump);
+ if (ndump == 0)
+ ndump = 64;
+ else if (ndump > MAX_DUMP)
+ ndump = MAX_DUMP;
+
+ 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";
+ }
+
+ adrs += ndump;
+ }
+}
+
+static void
+prdump(unsigned long adrs, long ndump)
+{
+ long n, m, c, r, nr;
+ unsigned char temp[16];
+
+ for (n = ndump; n > 0;) {
+ printf(REG, adrs);
+ putchar(' ');
+ r = n < 16? n: 16;
+ nr = mread(adrs, temp, r);
+ adrs += nr;
+ for (m = 0; m < r; ++m) {
+ if ((m & (sizeof(long) - 1)) == 0 && m > 0)
+ putchar(' ');
+ if (m < nr)
+ printf("%.2x", temp[m]);
+ else
+ printf("%s", fault_chars[fault_type]);
+ }
+ for (; m < 16; ++m) {
+ if ((m & (sizeof(long) - 1)) == 0)
+ putchar(' ');
+ printf(" ");
+ }
+ 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;
+ }
+}
+
+typedef int (*instruction_dump_func)(unsigned long inst, unsigned long addr);
+
+static int
+generic_inst_dump(unsigned long adr, long count, int praddr,
+ instruction_dump_func dump_func)
+{
+ int nr, dotted;
+ unsigned long first_adr;
+ struct ppc_inst inst, last_inst = ppc_inst(0);
+
+ dotted = 0;
+ for (first_adr = adr; count > 0; --count, adr += ppc_inst_len(inst)) {
+ nr = mread_instr(adr, &inst);
+ if (nr == 0) {
+ if (praddr) {
+ const char *x = fault_chars[fault_type];
+ printf(REG" %s%s%s%s\n", adr, x, x, x, x);
+ }
+ break;
+ }
+ if (adr > first_adr && ppc_inst_equal(inst, last_inst)) {
+ if (!dotted) {
+ printf(" ...\n");
+ dotted = 1;
+ }
+ continue;
+ }
+ dotted = 0;
+ last_inst = inst;
+ if (praddr)
+ printf(REG" %s", adr, ppc_inst_as_str(inst));
+ printf("\t");
+ if (!ppc_inst_prefixed(inst))
+ dump_func(ppc_inst_val(inst), adr);
+ else
+ dump_func(ppc_inst_as_u64(inst), adr);
+ printf("\n");
+ }
+ return adr - first_adr;
+}
+
+static int
+ppc_inst_dump(unsigned long adr, long count, int praddr)
+{
+ return generic_inst_dump(adr, count, praddr, print_insn_powerpc);
+}
+
+void
+print_address(unsigned long addr)
+{
+ xmon_print_symbol(addr, "\t# ", "");
+}
+
+static void
+dump_log_buf(void)
+{
+ struct kmsg_dumper dumper = { .active = 1 };
+ unsigned char buf[128];
+ size_t len;
+
+ if (setjmp(bus_error_jmp) != 0) {
+ printf("Error dumping printk buffer!\n");
+ return;
+ }
+
+ catch_memory_errors = 1;
+ sync();
+
+ kmsg_dump_rewind_nolock(&dumper);
+ xmon_start_pagination();
+ while (kmsg_dump_get_line_nolock(&dumper, false, buf, sizeof(buf), &len)) {
+ buf[len] = '\0';
+ printf("%s", buf);
+ }
+ xmon_end_pagination();
+
+ sync();
+ /* wait a little while to see if we get a machine check */
+ __delay(200);
+ catch_memory_errors = 0;
+}
+
+#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
+
+/*
+ * 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 */
+
+static void
+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':
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ break;
+ }
+ memmove((void *)mdest, (void *)msrc, mcount);
+ break;
+ case 's':
+ if (xmon_is_ro) {
+ printf(xmon_ro_msg);
+ break;
+ }
+ 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;
+ }
+}
+
+static void
+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("%px %.2x # %px %.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;
+
+static void
+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;
+
+static void
+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("%.8lx\n", a - mskip);
+ ook = ok;
+ if (a + mskip < a)
+ break;
+ }
+ if (ook)
+ printf("%.8lx\n", a - mskip);
+}
+
+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("%16px %16lx %16px %6d %6d %c %2d %s\n", tsk,
+ tsk->thread.ksp, tsk->thread.regs,
+ tsk->pid, rcu_dereference(tsk->parent)->pid,
+ state, task_cpu(tsk),
+ tsk->comm);
+}
+
+#ifdef CONFIG_PPC_BOOK3S_64
+static void format_pte(void *ptep, unsigned long pte)
+{
+ pte_t entry = __pte(pte);
+
+ printf("ptep @ 0x%016lx = 0x%016lx\n", (unsigned long)ptep, pte);
+ printf("Maps physical address = 0x%016lx\n", pte & PTE_RPN_MASK);
+
+ printf("Flags = %s%s%s%s%s\n",
+ pte_young(entry) ? "Accessed " : "",
+ pte_dirty(entry) ? "Dirty " : "",
+ pte_read(entry) ? "Read " : "",
+ pte_write(entry) ? "Write " : "",
+ pte_exec(entry) ? "Exec " : "");
+}
+
+static void show_pte(unsigned long addr)
+{
+ unsigned long tskv = 0;
+ struct task_struct *tsk = NULL;
+ struct mm_struct *mm;
+ pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep;
+
+ if (!scanhex(&tskv))
+ mm = &init_mm;
+ else
+ tsk = (struct task_struct *)tskv;
+
+ if (tsk == NULL)
+ mm = &init_mm;
+ else
+ mm = tsk->active_mm;
+
+ if (setjmp(bus_error_jmp) != 0) {
+ catch_memory_errors = 0;
+ printf("*** Error dumping pte for task %px\n", tsk);
+ return;
+ }
+
+ catch_memory_errors = 1;
+ sync();
+
+ if (mm == &init_mm)
+ pgdp = pgd_offset_k(addr);
+ else
+ pgdp = pgd_offset(mm, addr);
+
+ p4dp = p4d_offset(pgdp, addr);
+
+ if (p4d_none(*p4dp)) {
+ printf("No valid P4D\n");
+ return;
+ }
+
+ if (p4d_is_leaf(*p4dp)) {
+ format_pte(p4dp, p4d_val(*p4dp));
+ return;
+ }
+
+ printf("p4dp @ 0x%px = 0x%016lx\n", p4dp, p4d_val(*p4dp));
+
+ pudp = pud_offset(p4dp, addr);
+
+ if (pud_none(*pudp)) {
+ printf("No valid PUD\n");
+ return;
+ }
+
+ if (pud_is_leaf(*pudp)) {
+ format_pte(pudp, pud_val(*pudp));
+ return;
+ }
+
+ printf("pudp @ 0x%px = 0x%016lx\n", pudp, pud_val(*pudp));
+
+ pmdp = pmd_offset(pudp, addr);
+
+ if (pmd_none(*pmdp)) {
+ printf("No valid PMD\n");
+ return;
+ }
+
+ if (pmd_is_leaf(*pmdp)) {
+ format_pte(pmdp, pmd_val(*pmdp));
+ return;
+ }
+ printf("pmdp @ 0x%px = 0x%016lx\n", pmdp, pmd_val(*pmdp));
+
+ ptep = pte_offset_map(pmdp, addr);
+ if (pte_none(*ptep)) {
+ printf("no valid PTE\n");
+ return;
+ }
+
+ format_pte(ptep, pte_val(*ptep));
+
+ sync();
+ __delay(200);
+ catch_memory_errors = 0;
+}
+#else
+static void show_pte(unsigned long addr)
+{
+ printf("show_pte not yet implemented\n");
+}
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
+static void show_tasks(void)
+{
+ unsigned long tskv;
+ struct task_struct *tsk = NULL;
+
+ printf(" task_struct ->thread.ksp ->thread.regs 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 %px\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;
+}
+
+static void proccall(void)
+{
+ 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();
+ printf("return value is 0x%lx\n", ret);
+ } else {
+ printf("*** %x exception occurred\n", fault_except);
+ }
+ catch_memory_errors = 0;
+}
+
+/* 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 const 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",
+ "pc", "msr", "or3", "ctr", "lr", "xer", "ccr",
+#ifdef CONFIG_PPC64
+ "softe",
+#else
+ "mq",
+#endif
+ "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;
+ i = match_string(regnames, N_PTREGS, regname);
+ if (i < 0) {
+ printf("invalid register name '%%%s'\n", regname);
+ return 0;
+ }
+ if (xmon_regs == NULL) {
+ printf("regs not available\n");
+ return 0;
+ }
+ *vp = ((unsigned long *)xmon_regs)[i];
+ return 1;
+ }
+
+ /* 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();
+ if (isspace(c) || c == '\0') {
+ termch = c;
+ break;
+ }
+ tmpstr[i] = c;
+ }
+ tmpstr[i++] = 0;
+ *vp = 0;
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_memory_errors = 1;
+ sync();
+ *vp = kallsyms_lookup_name(tmpstr);
+ sync();
+ }
+ catch_memory_errors = 0;
+ 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;
+}
+
+static void
+scannl(void)
+{
+ int c;
+
+ c = termch;
+ termch = 0;
+ while( c != '\n' )
+ c = inchar();
+}
+
+static int hexdigit(int c)
+{
+ 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();
+ if (c == '\n') {
+ *s = 0;
+ return;
+ }
+
+ 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;
+
+static void
+flush_input(void)
+{
+ lineptr = NULL;
+}
+
+static int
+inchar(void)
+{
+ if (lineptr == NULL || *lineptr == 0) {
+ if (xmon_gets(line, sizeof(line)) == NULL) {
+ lineptr = NULL;
+ return EOF;
+ }
+ lineptr = line;
+ }
+ return *lineptr++;
+}
+
+static void
+take_input(char *str)
+{
+ lineptr = str;
+}
+
+
+static void
+symbol_lookup(void)
+{
+ int type = inchar();
+ unsigned long addr, cpu;
+ void __percpu *ptr = NULL;
+ 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;
+ case 'p':
+ getstring(tmp, 64);
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_memory_errors = 1;
+ sync();
+ ptr = (void __percpu *)kallsyms_lookup_name(tmp);
+ sync();
+ }
+
+ if (ptr &&
+ ptr >= (void __percpu *)__per_cpu_start &&
+ ptr < (void __percpu *)__per_cpu_end)
+ {
+ if (scanhex(&cpu) && cpu < num_possible_cpus()) {
+ addr = (unsigned long)per_cpu_ptr(ptr, cpu);
+ } else {
+ cpu = raw_smp_processor_id();
+ addr = (unsigned long)this_cpu_ptr(ptr);
+ }
+
+ printf("%s for cpu 0x%lx: %lx\n", tmp, cpu, addr);
+ } else {
+ printf("Percpu symbol '%s' not found.\n", tmp);
+ }
+
+ 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;
+
+ printf(REG, address);
+ 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);
+}
+
+#ifdef CONFIG_PPC_BOOK3S_64
+void dump_segments(void)
+{
+ int i;
+ unsigned long esid,vsid;
+ unsigned long llp;
+
+ printf("SLB contents of cpu 0x%x\n", smp_processor_id());
+
+ for (i = 0; i < mmu_slb_size; i++) {
+ asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i));
+ asm volatile("slbmfev %0,%1" : "=r" (vsid) : "r" (i));
+
+ if (!esid && !vsid)
+ continue;
+
+ printf("%02d %016lx %016lx", i, esid, vsid);
+
+ if (!(esid & SLB_ESID_V)) {
+ printf("\n");
+ continue;
+ }
+
+ 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);
+ }
+ }
+}
+#endif
+
+#ifdef CONFIG_PPC_BOOK3S_32
+void dump_segments(void)
+{
+ int i;
+
+ printf("sr0-15 =");
+ for (i = 0; i < 16; ++i)
+ printf(" %x", mfsrin(i << 28));
+ printf("\n");
+}
+#endif
+
+#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] %08lx %08lx %08lx ", i, w0, w1, w2);
+ if (w0 & PPC44x_TLB_VALID) {
+ printf("V %08lx -> %01lx%08lx %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 */
+
+#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 */
+
+static void xmon_init(int enable)
+{
+ if (enable) {
+ __debugger = xmon;
+ __debugger_ipi = xmon_ipi;
+ __debugger_bpt = xmon_bpt;
+ __debugger_sstep = xmon_sstep;
+ __debugger_iabr_match = xmon_iabr_match;
+ __debugger_break_match = xmon_break_match;
+ __debugger_fault_handler = xmon_fault_handler;
+
+#ifdef CONFIG_PPC_PSERIES
+ /*
+ * Get the token here to avoid trying to get a lock
+ * during the crash, causing a deadlock.
+ */
+ set_indicator_token = rtas_token("set-indicator");
+#endif
+ } else {
+ __debugger = NULL;
+ __debugger_ipi = NULL;
+ __debugger_bpt = NULL;
+ __debugger_sstep = NULL;
+ __debugger_iabr_match = NULL;
+ __debugger_break_match = NULL;
+ __debugger_fault_handler = NULL;
+ }
+}
+
+#ifdef CONFIG_MAGIC_SYSRQ
+static void sysrq_handle_xmon(int key)
+{
+ if (xmon_is_locked_down()) {
+ clear_all_bpt();
+ xmon_init(0);
+ return;
+ }
+ /* ensure xmon is enabled */
+ xmon_init(1);
+ debugger(get_irq_regs());
+ if (!xmon_on)
+ xmon_init(0);
+}
+
+static const struct sysrq_key_op sysrq_xmon_op = {
+ .handler = sysrq_handle_xmon,
+ .help_msg = "xmon(x)",
+ .action_msg = "Entering xmon",
+};
+
+static int __init setup_xmon_sysrq(void)
+{
+ register_sysrq_key('x', &sysrq_xmon_op);
+ return 0;
+}
+device_initcall(setup_xmon_sysrq);
+#endif /* CONFIG_MAGIC_SYSRQ */
+
+static void clear_all_bpt(void)
+{
+ int i;
+
+ /* clear/unpatch all breakpoints */
+ remove_bpts();
+ remove_cpu_bpts();
+
+ /* Disable all breakpoints */
+ for (i = 0; i < NBPTS; ++i)
+ bpts[i].enabled = 0;
+
+ /* Clear any data or iabr breakpoints */
+ iabr = NULL;
+ for (i = 0; i < nr_wp_slots(); i++)
+ dabr[i].enabled = 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int xmon_dbgfs_set(void *data, u64 val)
+{
+ xmon_on = !!val;
+ xmon_init(xmon_on);
+
+ /* make sure all breakpoints removed when disabling */
+ if (!xmon_on) {
+ clear_all_bpt();
+ get_output_lock();
+ printf("xmon: All breakpoints cleared\n");
+ release_output_lock();
+ }
+
+ return 0;
+}
+
+static int xmon_dbgfs_get(void *data, u64 *val)
+{
+ *val = xmon_on;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(xmon_dbgfs_ops, xmon_dbgfs_get,
+ xmon_dbgfs_set, "%llu\n");
+
+static int __init setup_xmon_dbgfs(void)
+{
+ debugfs_create_file("xmon", 0600, powerpc_debugfs_root, NULL,
+ &xmon_dbgfs_ops);
+ return 0;
+}
+device_initcall(setup_xmon_dbgfs);
+#endif /* CONFIG_DEBUG_FS */
+
+static int xmon_early __initdata;
+
+static int __init early_parse_xmon(char *p)
+{
+ if (xmon_is_locked_down()) {
+ xmon_init(0);
+ xmon_early = 0;
+ xmon_on = 0;
+ } else if (!p || strncmp(p, "early", 5) == 0) {
+ /* just "xmon" is equivalent to "xmon=early" */
+ xmon_init(1);
+ xmon_early = 1;
+ xmon_on = 1;
+ } else if (strncmp(p, "on", 2) == 0) {
+ xmon_init(1);
+ xmon_on = 1;
+ } else if (strncmp(p, "rw", 2) == 0) {
+ xmon_init(1);
+ xmon_on = 1;
+ xmon_is_ro = false;
+ } else if (strncmp(p, "ro", 2) == 0) {
+ xmon_init(1);
+ xmon_on = 1;
+ xmon_is_ro = true;
+ } else if (strncmp(p, "off", 3) == 0)
+ xmon_on = 0;
+ else
+ return 1;
+
+ return 0;
+}
+early_param("xmon", early_parse_xmon);
+
+void __init xmon_setup(void)
+{
+ if (xmon_on)
+ xmon_init(1);
+ if (xmon_early)
+ debugger(NULL);
+}
+
+#ifdef CONFIG_SPU_BASE
+
+struct spu_info {
+ struct spu *spu;
+ u64 saved_mfc_sr1_RW;
+ u32 saved_spu_runcntl_RW;
+ unsigned long dump_addr;
+ 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;
+ spu_info[spu->number].dump_addr = (unsigned long)
+ spu_info[spu->number].spu->local_store;
+ }
+}
+
+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;
+
+ printf("Stopped spu %.2d (was %s)\n", i,
+ spu_info[i].saved_spu_runcntl_RW ?
+ "running" : "stopped");
+ } 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;
+ }
+}
+
+#define DUMP_WIDTH 23
+#define DUMP_VALUE(format, field, value) \
+do { \
+ if (setjmp(bus_error_jmp) == 0) { \
+ catch_memory_errors = 1; \
+ sync(); \
+ printf(" %-*s = "format"\n", DUMP_WIDTH, \
+ #field, value); \
+ sync(); \
+ __delay(200); \
+ } else { \
+ catch_memory_errors = 0; \
+ printf(" %-*s = *** Error reading field.\n", \
+ DUMP_WIDTH, #field); \
+ } \
+ catch_memory_errors = 0; \
+} while (0)
+
+#define DUMP_FIELD(obj, format, field) \
+ DUMP_VALUE(format, field, obj->field)
+
+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, "%llu", class_0_pending);
+ DUMP_FIELD(spu, "0x%llx", class_0_dar);
+ DUMP_FIELD(spu, "0x%llx", class_1_dar);
+ DUMP_FIELD(spu, "0x%llx", class_1_dsisr);
+ DUMP_FIELD(spu, "0x%x", irqs[0]);
+ DUMP_FIELD(spu, "0x%x", irqs[1]);
+ DUMP_FIELD(spu, "0x%x", 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%llx", timestamp);
+ DUMP_FIELD(spu, "0x%lx", problem_phys);
+ DUMP_FIELD(spu, "0x%p", problem);
+ 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));
+ DUMP_FIELD(spu, "0x%p", priv2);
+ DUMP_FIELD(spu, "0x%p", pdata);
+}
+
+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)
+{
+ 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 %ld\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;
+ }
+
+ 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;
+ }
+
+ spu_info[num].dump_addr = addr;
+}
+
+static int do_spu_cmd(void)
+{
+ static unsigned long num = 0;
+ int cmd, subcmd = 0;
+
+ cmd = inchar();
+ switch (cmd) {
+ case 's':
+ stop_spus();
+ break;
+ case 'r':
+ restart_spus();
+ break;
+ case 'd':
+ subcmd = inchar();
+ if (isxdigit(subcmd) || subcmd == '\n')
+ termch = subcmd;
+ fallthrough;
+ case 'f':
+ scanhex(&num);
+ if (num >= XMON_NUM_SPUS || !spu_info[num].spu) {
+ printf("*** Error: invalid spu number\n");
+ return 0;
+ }
+
+ switch (cmd) {
+ case 'f':
+ dump_spu_fields(spu_info[num].spu);
+ break;
+ default:
+ dump_spu_ls(num, subcmd);
+ break;
+ }
+
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+#else /* ! CONFIG_SPU_BASE */
+static int do_spu_cmd(void)
+{
+ return -1;
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 03:36:22 +0000