mn10300: add the MN10300/AM33 architecture to the kernel

Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.

This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305.  The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.

[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 619 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/traps.c b/arch/mn10300/kernel/traps.c
new file mode 100644
index 000000000000..8b9dc6d9dcc6
--- /dev/null
+++ b/arch/mn10300/kernel/traps.c
@@ -0,0 +1,619 @@
+/* MN10300 Exception handling
+ *
+ * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Modified by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/kallsyms.h>
+#include <linux/pci.h>
+#include <linux/kdebug.h>
+#include <linux/bug.h>
+#include <linux/irq.h>
+#include <asm/processor.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/atomic.h>
+#include <asm/smp.h>
+#include <asm/pgalloc.h>
+#include <asm/cacheflush.h>
+#include <asm/cpu-regs.h>
+#include <asm/busctl-regs.h>
+#include <asm/unit/leds.h>
+#include <asm/fpu.h>
+#include <asm/gdb-stub.h>
+#include <asm/sections.h>
+
+#if (CONFIG_INTERRUPT_VECTOR_BASE & 0xffffff)
+#error "INTERRUPT_VECTOR_BASE not aligned to 16MiB boundary!"
+#endif
+
+struct pt_regs *__frame; /* current frame pointer */
+EXPORT_SYMBOL(__frame);
+
+int kstack_depth_to_print = 24;
+
+spinlock_t die_lock = __SPIN_LOCK_UNLOCKED(die_lock);
+
+ATOMIC_NOTIFIER_HEAD(mn10300_die_chain);
+
+/*
+ * These constants are for searching for possible module text
+ * segments. MODULE_RANGE is a guess of how much space is likely
+ * to be vmalloced.
+ */
+#define MODULE_RANGE (8 * 1024 * 1024)
+
+#define DO_ERROR(signr, prologue, str, name)			\
+asmlinkage void name(struct pt_regs *regs, u32 intcode)		\
+{								\
+	prologue;						\
+	if (die_if_no_fixup(str, regs, intcode))		\
+		return;						\
+	force_sig(signr, current);				\
+}
+
+#define DO_EINFO(signr, prologue, str, name, sicode)			\
+asmlinkage void name(struct pt_regs *regs, u32 intcode)			\
+{									\
+	siginfo_t info;							\
+	prologue;							\
+	if (die_if_no_fixup(str, regs, intcode))			\
+		return;							\
+	info.si_signo = signr;						\
+	if (signr == SIGILL && sicode == ILL_ILLOPC) {			\
+		uint8_t opcode;						\
+		if (get_user(opcode, (uint8_t __user *)regs->pc) == 0)	\
+			if (opcode == 0xff)				\
+				info.si_signo = SIGTRAP;		\
+	}								\
+	info.si_errno = 0;						\
+	info.si_code = sicode;						\
+	info.si_addr = (void *) regs->pc;				\
+	force_sig_info(info.si_signo, &info, current);			\
+}
+
+DO_ERROR(SIGTRAP, {}, "trap",			trap);
+DO_ERROR(SIGSEGV, {}, "ibreak",			ibreak);
+DO_ERROR(SIGSEGV, {}, "obreak",			obreak);
+DO_EINFO(SIGSEGV, {}, "access error",		access_error,	SEGV_ACCERR);
+DO_EINFO(SIGSEGV, {}, "insn access error",	insn_acc_error,	SEGV_ACCERR);
+DO_EINFO(SIGSEGV, {}, "data access error",	data_acc_error,	SEGV_ACCERR);
+DO_EINFO(SIGILL,  {}, "privileged opcode",	priv_op,	ILL_PRVOPC);
+DO_EINFO(SIGILL,  {}, "invalid opcode",		invalid_op,	ILL_ILLOPC);
+DO_EINFO(SIGILL,  {}, "invalid ex opcode",	invalid_exop,	ILL_ILLOPC);
+DO_EINFO(SIGBUS,  {}, "invalid address",	mem_error,	BUS_ADRERR);
+DO_EINFO(SIGBUS,  {}, "bus error",		bus_error,	BUS_ADRERR);
+DO_EINFO(SIGILL,  {}, "FPU invalid opcode", 	fpu_invalid_op,	ILL_COPROC);
+
+DO_ERROR(SIGTRAP,
+#ifndef CONFIG_MN10300_USING_JTAG
+	 DCR &= ~0x0001,
+#else
+	 {},
+#endif
+	 "single step", istep);
+
+/*
+ * handle NMI
+ */
+asmlinkage void nmi(struct pt_regs *regs, enum exception_code code)
+{
+	/* see if gdbstub wants to deal with it */
+#ifdef CONFIG_GDBSTUB
+	if (gdbstub_intercept(regs, code))
+		return;
+#endif
+
+	printk(KERN_WARNING "--- Register Dump ---\n");
+	show_registers(regs);
+	printk(KERN_WARNING "---------------------\n");
+}
+
+/*
+ * show a stack trace from the specified stack pointer
+ */
+void show_trace(unsigned long *sp)
+{
+	unsigned long *stack, addr, module_start, module_end;
+	int i;
+
+	printk(KERN_EMERG "\n"
+	       KERN_EMERG "Call Trace:");
+
+	stack = sp;
+	i = 0;
+	module_start = VMALLOC_START;
+	module_end = VMALLOC_END;
+
+	while (((long) stack & (THREAD_SIZE - 1)) != 0) {
+		addr = *stack++;
+		if (__kernel_text_address(addr)) {
+#if 1
+			printk(" [<%08lx>]", addr);
+			print_symbol(" %s", addr);
+			printk("\n");
+#else
+			if ((i % 6) == 0)
+				printk("\n" KERN_EMERG "  ");
+			printk("[<%08lx>] ", addr);
+			i++;
+#endif
+		}
+	}
+
+	printk("\n");
+}
+
+/*
+ * show the raw stack from the specified stack pointer
+ */
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	unsigned long *stack;
+	int i;
+
+	if (!sp)
+		sp = (unsigned long *) &sp;
+
+	stack = sp;
+	printk(KERN_EMERG "Stack:");
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (((long) stack & (THREAD_SIZE - 1)) == 0)
+			break;
+		if ((i % 8) == 0)
+			printk("\n" KERN_EMERG "  ");
+		printk("%08lx ", *stack++);
+	}
+
+	show_trace(sp);
+}
+
+/*
+ * the architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+	unsigned long stack;
+
+	show_stack(current, &stack);
+}
+EXPORT_SYMBOL(dump_stack);
+
+/*
+ * dump the register file in the specified exception frame
+ */
+void show_registers_only(struct pt_regs *regs)
+{
+	unsigned long ssp;
+
+	ssp = (unsigned long) regs + sizeof(*regs);
+
+	printk(KERN_EMERG "PC:  %08lx EPSW:  %08lx  SSP: %08lx mode: %s\n",
+	       regs->pc, regs->epsw, ssp, user_mode(regs) ? "User" : "Super");
+	printk(KERN_EMERG "d0:  %08lx   d1:  %08lx   d2: %08lx   d3: %08lx\n",
+	       regs->d0, regs->d1, regs->d2, regs->d3);
+	printk(KERN_EMERG "a0:  %08lx   a1:  %08lx   a2: %08lx   a3: %08lx\n",
+	       regs->a0, regs->a1, regs->a2, regs->a3);
+	printk(KERN_EMERG "e0:  %08lx   e1:  %08lx   e2: %08lx   e3: %08lx\n",
+	       regs->e0, regs->e1, regs->e2, regs->e3);
+	printk(KERN_EMERG "e4:  %08lx   e5:  %08lx   e6: %08lx   e7: %08lx\n",
+	       regs->e4, regs->e5, regs->e6, regs->e7);
+	printk(KERN_EMERG "lar: %08lx   lir: %08lx  mdr: %08lx  usp: %08lx\n",
+	       regs->lar, regs->lir, regs->mdr, regs->sp);
+	printk(KERN_EMERG "cvf: %08lx   crl: %08lx  crh: %08lx  drq: %08lx\n",
+	       regs->mcvf, regs->mcrl, regs->mcrh, regs->mdrq);
+	printk(KERN_EMERG "threadinfo=%p task=%p)\n",
+	       current_thread_info(), current);
+
+	if ((unsigned long) current >= 0x90000000UL &&
+	    (unsigned long) current < 0x94000000UL)
+		printk(KERN_EMERG "Process %s (pid: %d)\n",
+		       current->comm, current->pid);
+
+	printk(KERN_EMERG "CPUP:   %04hx\n", CPUP);
+	printk(KERN_EMERG "TBR:    %08x\n", TBR);
+	printk(KERN_EMERG "DEAR:   %08x\n", DEAR);
+	printk(KERN_EMERG "sISR:   %08x\n", sISR);
+	printk(KERN_EMERG "NMICR:  %04hx\n", NMICR);
+	printk(KERN_EMERG "BCBERR: %08x\n", BCBERR);
+	printk(KERN_EMERG "BCBEAR: %08x\n", BCBEAR);
+	printk(KERN_EMERG "MMUFCR: %08x\n", MMUFCR);
+	printk(KERN_EMERG "IPTEU : %08x  IPTEL2: %08x\n", IPTEU, IPTEL2);
+	printk(KERN_EMERG "DPTEU:  %08x  DPTEL2: %08x\n", DPTEU, DPTEL2);
+}
+
+/*
+ * dump the registers and the stack
+ */
+void show_registers(struct pt_regs *regs)
+{
+	unsigned long sp;
+	int i;
+
+	show_registers_only(regs);
+
+	if (!user_mode(regs))
+		sp = (unsigned long) regs + sizeof(*regs);
+	else
+		sp = regs->sp;
+
+	/* when in-kernel, we also print out the stack and code at the
+	 * time of the fault..
+	 */
+	if (!user_mode(regs)) {
+		printk(KERN_EMERG "\n");
+		show_stack(current, (unsigned long *) sp);
+
+#if 0
+		printk(KERN_EMERG "\n"
+		       KERN_EMERG "Code: ");
+		if (regs->pc < PAGE_OFFSET)
+			goto bad;
+
+		for (i = 0; i < 20; i++) {
+			unsigned char c;
+			if (__get_user(c, &((unsigned char *) regs->pc)[i]))
+				goto bad;
+			printk("%02x ", c);
+		}
+#else
+		i = 0;
+#endif
+	}
+
+	printk("\n");
+	return;
+
+#if 0
+bad:
+	printk(KERN_EMERG " Bad PC value.");
+	break;
+#endif
+}
+
+/*
+ *
+ */
+void show_trace_task(struct task_struct *tsk)
+{
+	unsigned long sp = tsk->thread.sp;
+
+	/* User space on another CPU? */
+	if ((sp ^ (unsigned long) tsk) & (PAGE_MASK << 1))
+		return;
+
+	show_trace((unsigned long *) sp);
+}
+
+/*
+ * note the untimely death of part of the kernel
+ */
+void die(const char *str, struct pt_regs *regs, enum exception_code code)
+{
+	console_verbose();
+	spin_lock_irq(&die_lock);
+	printk(KERN_EMERG "\n"
+	       KERN_EMERG "%s: %04x\n",
+	       str, code & 0xffff);
+	show_registers(regs);
+
+	if (regs->pc >= 0x02000000 && regs->pc < 0x04000000 &&
+	    (regs->epsw & (EPSW_IM | EPSW_IE)) != (EPSW_IM | EPSW_IE)) {
+		printk(KERN_EMERG "Exception in usermode interrupt handler\n");
+		printk(KERN_EMERG "\n"
+		       KERN_EMERG "  Please connect to kernel debugger !!\n");
+		asm volatile ("0: bra 0b");
+	}
+
+	spin_unlock_irq(&die_lock);
+	do_exit(SIGSEGV);
+}
+
+/*
+ * see if there's a fixup handler we can force a jump to when an exception
+ * happens due to something kernel code did
+ */
+int die_if_no_fixup(const char *str, struct pt_regs *regs,
+		    enum exception_code code)
+{
+	if (user_mode(regs))
+		return 0;
+
+	peripheral_leds_display_exception(code);
+
+	switch (code) {
+		/* see if we can fixup the kernel accessing memory */
+	case EXCEP_ITLBMISS:
+	case EXCEP_DTLBMISS:
+	case EXCEP_IAERROR:
+	case EXCEP_DAERROR:
+	case EXCEP_MEMERR:
+	case EXCEP_MISALIGN:
+	case EXCEP_BUSERROR:
+	case EXCEP_ILLDATACC:
+	case EXCEP_IOINSACC:
+	case EXCEP_PRIVINSACC:
+	case EXCEP_PRIVDATACC:
+	case EXCEP_DATINSACC:
+		if (fixup_exception(regs))
+			return 1;
+	case EXCEP_UNIMPINS:
+		if (regs->pc && *(uint8_t *)regs->pc == 0xff)
+			if (notify_die(DIE_BREAKPOINT, str, regs, code, 0, 0))
+				return 1;
+		break;
+	default:
+		break;
+	}
+
+	/* see if gdbstub wants to deal with it */
+#ifdef CONFIG_GDBSTUB
+	if (gdbstub_intercept(regs, code))
+		return 1;
+#endif
+
+	if (notify_die(DIE_GPF, str, regs, code, 0, 0))
+		return 1;
+
+	/* make the process die as the last resort */
+	die(str, regs, code);
+}
+
+/*
+ * handle unsupported syscall instructions (syscall 1-15)
+ */
+static asmlinkage void unsupported_syscall(struct pt_regs *regs,
+					   enum exception_code code)
+{
+	struct task_struct *tsk = current;
+	siginfo_t info;
+
+	/* catch a kernel BUG() */
+	if (code == EXCEP_SYSCALL15 && !user_mode(regs)) {
+		if (report_bug(regs->pc, regs) == BUG_TRAP_TYPE_BUG) {
+#ifdef CONFIG_GDBSTUB
+			__gdbstub_bug_trap();
+#endif
+		}
+	}
+
+	regs->pc -= 2; /* syscall return addr is _after_ the instruction */
+
+	die_if_no_fixup("An unsupported syscall insn was used by the kernel\n",
+			regs, code);
+
+	info.si_signo	= SIGILL;
+	info.si_errno	= ENOSYS;
+	info.si_code	= ILL_ILLTRP;
+	info.si_addr	= (void *) regs->pc;
+	force_sig_info(SIGILL, &info, tsk);
+}
+
+/*
+ * display the register file when the stack pointer gets clobbered
+ */
+asmlinkage void do_double_fault(struct pt_regs *regs)
+{
+	struct task_struct *tsk = current;
+
+	strcpy(tsk->comm, "emergency tsk");
+	tsk->pid = 0;
+	console_verbose();
+	printk(KERN_EMERG "--- double fault ---\n");
+	show_registers(regs);
+}
+
+/*
+ * asynchronous bus error (external, usually I/O DMA)
+ */
+asmlinkage void io_bus_error(u32 bcberr, u32 bcbear, struct pt_regs *regs)
+{
+	console_verbose();
+
+	printk(KERN_EMERG "\n"
+	       KERN_EMERG "Asynchronous I/O Bus Error\n"
+	       KERN_EMERG "==========================\n");
+
+	if (bcberr & BCBERR_BEME)
+		printk(KERN_EMERG "- Multiple recorded errors\n");
+
+	printk(KERN_EMERG "- Faulting Buses:%s%s%s\n",
+	       bcberr & BCBERR_BEMR_CI  ? " CPU-Ins-Fetch" : "",
+	       bcberr & BCBERR_BEMR_CD  ? " CPU-Data" : "",
+	       bcberr & BCBERR_BEMR_DMA ? " DMA" : "");
+
+	printk(KERN_EMERG "- %s %s access made to %s at address %08x\n",
+	       bcberr &	BCBERR_BEBST ? "Burst" : "Single",
+	       bcberr &	BCBERR_BERW ? "Read" : "Write",
+	       bcberr &	BCBERR_BESB_MON  ? "Monitor Space" :
+	       bcberr &	BCBERR_BESB_IO   ? "Internal CPU I/O Space" :
+	       bcberr &	BCBERR_BESB_EX   ? "External I/O Bus" :
+	       bcberr &	BCBERR_BESB_OPEX ? "External Memory Bus" :
+	       "On Chip Memory",
+	       bcbear
+	       );
+
+	printk(KERN_EMERG "- Detected by the %s\n",
+	       bcberr&BCBERR_BESD ? "Bus Control Unit" : "Slave Bus");
+
+#ifdef CONFIG_PCI
+#define BRIDGEREGB(X) (*(volatile __u8  *)(0xBE040000 + (X)))
+#define BRIDGEREGW(X) (*(volatile __u16 *)(0xBE040000 + (X)))
+#define BRIDGEREGL(X) (*(volatile __u32 *)(0xBE040000 + (X)))
+
+	printk(KERN_EMERG "- PCI Memory Paging Reg:         %08x\n",
+	       *(volatile __u32 *) (0xBFFFFFF4));
+	printk(KERN_EMERG "- PCI Bridge Base Address 0:     %08x\n",
+	       BRIDGEREGL(PCI_BASE_ADDRESS_0));
+	printk(KERN_EMERG "- PCI Bridge AMPCI Base Address: %08x\n",
+	       BRIDGEREGL(0x48));
+	printk(KERN_EMERG "- PCI Bridge Command:                %04hx\n",
+	       BRIDGEREGW(PCI_COMMAND));
+	printk(KERN_EMERG "- PCI Bridge Status:                 %04hx\n",
+	       BRIDGEREGW(PCI_STATUS));
+	printk(KERN_EMERG "- PCI Bridge Int Status:         %08hx\n",
+	       BRIDGEREGL(0x4c));
+#endif
+
+	printk(KERN_EMERG "\n");
+	show_registers(regs);
+
+	panic("Halted due to asynchronous I/O Bus Error\n");
+}
+
+/*
+ * handle an exception for which a handler has not yet been installed
+ */
+asmlinkage void uninitialised_exception(struct pt_regs *regs,
+					enum exception_code code)
+{
+
+	/* see if gdbstub wants to deal with it */
+#ifdef CONFIG_GDBSTUB
+	if (gdbstub_intercept(regs, code))
+		return;
+#endif
+
+	peripheral_leds_display_exception(code);
+	printk(KERN_EMERG "Uninitialised Exception 0x%04x\n", code & 0xFFFF);
+	show_registers(regs);
+
+	for (;;)
+		continue;
+}
+
+/*
+ * set an interrupt stub to jump to a handler
+ * ! NOTE: this does *not* flush the caches
+ */
+void __init __set_intr_stub(enum exception_code code, void *handler)
+{
+	unsigned long addr;
+	u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code);
+
+	addr = (unsigned long) handler - (unsigned long) vector;
+	vector[0] = 0xdc;		/* JMP handler */
+	vector[1] = addr;
+	vector[2] = addr >> 8;
+	vector[3] = addr >> 16;
+	vector[4] = addr >> 24;
+	vector[5] = 0xcb;
+	vector[6] = 0xcb;
+	vector[7] = 0xcb;
+}
+
+/*
+ * set an interrupt stub to jump to a handler
+ */
+void __init set_intr_stub(enum exception_code code, void *handler)
+{
+	unsigned long addr;
+	u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code);
+
+	addr = (unsigned long) handler - (unsigned long) vector;
+	vector[0] = 0xdc;		/* JMP handler */
+	vector[1] = addr;
+	vector[2] = addr >> 8;
+	vector[3] = addr >> 16;
+	vector[4] = addr >> 24;
+	vector[5] = 0xcb;
+	vector[6] = 0xcb;
+	vector[7] = 0xcb;
+
+	mn10300_dcache_flush_inv();
+	mn10300_icache_inv();
+}
+
+/*
+ * set an interrupt stub to invoke the JTAG unit and then jump to a handler
+ */
+void __init set_jtag_stub(enum exception_code code, void *handler)
+{
+	unsigned long addr;
+	u8 *vector = (u8 *)(CONFIG_INTERRUPT_VECTOR_BASE + code);
+
+	addr = (unsigned long) handler - ((unsigned long) vector + 1);
+	vector[0] = 0xff;		/* PI to jump into JTAG debugger */
+	vector[1] = 0xdc;		/* jmp handler */
+	vector[2] = addr;
+	vector[3] = addr >> 8;
+	vector[4] = addr >> 16;
+	vector[5] = addr >> 24;
+	vector[6] = 0xcb;
+	vector[7] = 0xcb;
+
+	mn10300_dcache_flush_inv();
+	flush_icache_range((unsigned long) vector, (unsigned long) vector + 8);
+}
+
+/*
+ * initialise the exception table
+ */
+void __init trap_init(void)
+{
+	set_excp_vector(EXCEP_TRAP,		trap);
+	set_excp_vector(EXCEP_ISTEP,		istep);
+	set_excp_vector(EXCEP_IBREAK,		ibreak);
+	set_excp_vector(EXCEP_OBREAK,		obreak);
+
+	set_excp_vector(EXCEP_PRIVINS,		priv_op);
+	set_excp_vector(EXCEP_UNIMPINS,		invalid_op);
+	set_excp_vector(EXCEP_UNIMPEXINS,	invalid_exop);
+	set_excp_vector(EXCEP_MEMERR,		mem_error);
+	set_excp_vector(EXCEP_MISALIGN,		misalignment);
+	set_excp_vector(EXCEP_BUSERROR,		bus_error);
+	set_excp_vector(EXCEP_ILLINSACC,	insn_acc_error);
+	set_excp_vector(EXCEP_ILLDATACC,	data_acc_error);
+	set_excp_vector(EXCEP_IOINSACC,		insn_acc_error);
+	set_excp_vector(EXCEP_PRIVINSACC,	insn_acc_error);
+	set_excp_vector(EXCEP_PRIVDATACC,	data_acc_error);
+	set_excp_vector(EXCEP_DATINSACC,	insn_acc_error);
+	set_excp_vector(EXCEP_FPU_DISABLED,	fpu_disabled);
+	set_excp_vector(EXCEP_FPU_UNIMPINS,	fpu_invalid_op);
+	set_excp_vector(EXCEP_FPU_OPERATION,	fpu_exception);
+
+	set_excp_vector(EXCEP_NMI,		nmi);
+
+	set_excp_vector(EXCEP_SYSCALL1,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL2,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL3,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL4,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL5,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL6,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL7,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL8,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL9,		unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL10,	unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL11,	unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL12,	unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL13,	unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL14,	unsupported_syscall);
+	set_excp_vector(EXCEP_SYSCALL15,	unsupported_syscall);
+}
+
+/*
+ * determine if a program counter value is a valid bug address
+ */
+int is_valid_bugaddr(unsigned long pc)
+{
+	return pc >= PAGE_OFFSET;
+}