Diagnostics.c   [plain text]

/*
 * Copyright (c) 2005-2008 Apple Inc. All rights reserved.
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 * 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
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 * 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
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/*
 * @OSF_FREE_COPYRIGHT@
 */
/*
 * @APPLE_FREE_COPYRIGHT@
 */

/*
 *	Author: Bill Angell, Apple
 *	Date:	10/auht-five
 *
 *	Random diagnostics, augmented Derek Kumar 2011
 *
 *
 */


#include <kern/machine.h>
#include <kern/processor.h>
#include <mach/machine.h>
#include <mach/processor_info.h>
#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <kern/thread.h>
#include <kern/task.h>
#include <kern/ipc_kobject.h>
#include <mach/vm_param.h>
#include <ipc/port.h>
#include <ipc/ipc_entry.h>
#include <ipc/ipc_space.h>
#include <ipc/ipc_object.h>
#include <ipc/ipc_port.h>
#include <vm/vm_kern.h>
#include <vm/vm_map.h>
#include <vm/vm_page.h>
#include <vm/pmap.h>
#include <pexpert/pexpert.h>
#include <console/video_console.h>
#include <i386/cpu_data.h>
#include <i386/Diagnostics.h>
#include <i386/mp.h>
#include <i386/pmCPU.h>
#include <i386/tsc.h>
#include <mach/i386/syscall_sw.h>
#include <kern/kalloc.h>

diagWork        dgWork;
uint64_t        lastRuptClear = 0ULL;

int 
diagCall64(x86_saved_state_t * state)
{
	uint64_t        curpos, i, j;
	uint64_t        selector, data;
	uint64_t        currNap, durNap;
	x86_saved_state64_t	*regs;

	assert(is_saved_state64(state));
	regs = saved_state64(state);

	if (!(dgWork.dgFlags & enaDiagSCs))
		return 0;	/* If not enabled, cause an exception */

	selector = regs->rdi;

	switch (selector) {	/* Select the routine */
	case dgRuptStat:	/* Suck Interruption statistics */
		(void) ml_set_interrupts_enabled(TRUE);
		data = regs->rsi; /* Get the number of processors */

		if (data == 0) { /* If no location is specified for data, clear all
				  * counts
				  */
			for (i = 0; i < real_ncpus; i++) {	/* Cycle through
								 * processors */
				for (j = 0; j < 256; j++)
					cpu_data_ptr[i]->cpu_hwIntCnt[j] = 0;
			}

			lastRuptClear = mach_absolute_time();	/* Get the time of clear */
			return 1;	/* Normal return */
		}

		(void) copyout((char *) &real_ncpus, data, sizeof(real_ncpus));	/* Copy out number of
										 * processors */

		currNap = mach_absolute_time();	/* Get the time now */
		durNap = currNap - lastRuptClear;	/* Get the last interval
							 * duration */
		if (durNap == 0)
			durNap = 1;	/* This is a very short time, make it
					 * bigger */

		curpos = data + sizeof(real_ncpus);	/* Point to the next
							 * available spot */

		for (i = 0; i < real_ncpus; i++) {	/* Move 'em all out */
			(void) copyout((char *) &durNap, curpos, 8);	/* Copy out the time
									 * since last clear */
			(void) copyout((char *) &cpu_data_ptr[i]->cpu_hwIntCnt, curpos + 8, 256 * sizeof(uint32_t));	/* Copy out interrupt
															 * data for this
															 * processor */
			curpos = curpos + (256 * sizeof(uint32_t) + 8);	/* Point to next out put
									 * slot */
		}
		return 1;
		break;
#if	DEBUG
	case dgGzallocTest:
	{
		(void) ml_set_interrupts_enabled(TRUE);
		unsigned *ptr = (unsigned *)kalloc(1024);
		kfree(ptr, 1024);
		*ptr = 0x42;
	}
		break;
#endif

#if	defined(__x86_64__)		
	case	dgPermCheck:
	{
		(void) ml_set_interrupts_enabled(TRUE);
		return pmap_permissions_verify(kernel_pmap, kernel_map, 0, ~0ULL);
	}
 		break;
#endif /* __x86_64__*/

	default:		/* Handle invalid ones */
		return 0;	/* Return an exception */
	}

	return 1;		/* Normal non-ast check return */
}