/*
 * Copyright (c) 2009-2012 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */

/*
 * Hardware trap/fault handler.
 */

#include <types.h>
#include <i386/eflags.h>
#include <i386/trap.h>
#include <i386/pmap.h>
#include <i386/fpu.h>
#include <i386/panic_notify.h>

#include <mach/exception.h>
#include <mach/kern_return.h>
#include <mach/vm_param.h>
#include <mach/i386/thread_status.h>

#include <kern/kern_types.h>
#include <kern/processor.h>
#include <kern/thread.h>
#include <kern/task.h>
#include <kern/sched.h>
#include <kern/sched_prim.h>
#include <kern/exception.h>
#include <kern/spl.h>
#include <kern/misc_protos.h>
#include <kern/debug.h>

#include <sys/kdebug.h>

#include <string.h>

#include <i386/postcode.h>
#include <i386/mp_desc.h>
#include <i386/proc_reg.h>
#if CONFIG_MCA
#include <i386/machine_check.h>
#endif
#include <mach/i386/syscall_sw.h>

#include <machine/pal_routines.h>
#include <libkern/OSAtomic.h>

extern void kprintf_break_lock(void);
extern void kprint_state(x86_saved_state64_t *saved_state);

extern volatile int panic_double_fault_cpu;


#if defined(__x86_64__) && DEBUG
/*
 * K64 debug - fatal handler for debug code in the trap vectors.
 */
extern void __dead2
panic_idt64(x86_saved_state_t *rsp);
void
panic_idt64(x86_saved_state_t *rsp)
{
	kprint_state(saved_state64(rsp));
	panic("panic_idt64");
}
#endif


__dead2
static void
panic_64(x86_saved_state_t *sp, __unused int pc, __unused const char *msg, boolean_t do_mca_dump)
{
	/* Set postcode (DEBUG only) */
	postcode(pc);

	/*
	 * Issue an I/O port read if one has been requested - this is an
	 * event logic analyzers can use as a trigger point.
	 */
	panic_notify();


	/*
	 * Break kprintf lock in case of recursion,
	 * and record originally faulted instruction address.
	 */
	kprintf_break_lock();

	if (do_mca_dump) {
#if CONFIG_MCA
		/*
		 * Dump the contents of the machine check MSRs (if any).
		 */
		mca_dump();
#endif
	}

	x86_saved_state64_t *regs = saved_state64(sp);
	panic("%s at 0x%016llx, registers:\n"
	    "CR0: 0x%016lx, CR2: 0x%016lx, CR3: 0x%016lx, CR4: 0x%016lx\n"
	    "RAX: 0x%016llx, RBX: 0x%016llx, RCX: 0x%016llx, RDX: 0x%016llx\n"
	    "RSP: 0x%016llx, RBP: 0x%016llx, RSI: 0x%016llx, RDI: 0x%016llx\n"
	    "R8:  0x%016llx, R9:  0x%016llx, R10: 0x%016llx, R11: 0x%016llx\n"
	    "R12: 0x%016llx, R13: 0x%016llx, R14: 0x%016llx, R15: 0x%016llx\n"
	    "RFL: 0x%016llx, RIP: 0x%016llx, CS:  0x%016llx, SS:  0x%016llx\n"
	    "Error code: 0x%016llx%s\n",
	    msg,
	    regs->isf.rip,
	    get_cr0(), get_cr2(), get_cr3_raw(), get_cr4(),
	    regs->rax, regs->rbx, regs->rcx, regs->rdx,
	    regs->isf.rsp, regs->rbp, regs->rsi, regs->rdi,
	    regs->r8, regs->r9, regs->r10, regs->r11,
	    regs->r12, regs->r13, regs->r14, regs->r15,
	    regs->isf.rflags, regs->isf.rip, regs->isf.cs & 0xFFFF, regs->isf.ss & 0xFFFF,
	    regs->isf.err, virtualized ? " VMM" : "");
}

void
panic_double_fault64(x86_saved_state_t *sp)
{
#if DEVELOPMENT || DEBUG
	uint64_t frameptr = is_saved_state64(sp) ? saved_state64(sp)->rbp : saved_state32(sp)->ebp;
	(void) traptrace_start(T_DOUBLE_FAULT, saved_state64(sp)->isf.rip, mach_absolute_time(), frameptr);
#endif
	(void)OSCompareAndSwap((UInt32) - 1, (UInt32) cpu_number(), (volatile UInt32 *)&panic_double_fault_cpu);
	panic_64(sp, PANIC_DOUBLE_FAULT, "Double fault", FALSE);
}
void
panic_machine_check64(x86_saved_state_t *sp)
{
#if DEVELOPMENT || DEBUG
	uint64_t frameptr = is_saved_state64(sp) ? saved_state64(sp)->rbp : saved_state32(sp)->ebp;
	(void) traptrace_start(T_MACHINE_CHECK, saved_state64(sp)->isf.rip, mach_absolute_time(), frameptr);
#endif
	panic_64(sp, PANIC_MACHINE_CHECK, "Machine Check", TRUE);
}