xnu-6153.11.26.tar.gz

[apple/xnu.git] / osfmk / vm / vm_init.c

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 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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 * This file contains Original Code and/or Modifications of Original Code
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 * may not be used to create, or enable the creation or redistribution of,
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 * 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_COPYRIGHT@
 */
/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 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.
 */
/*
 */
/*
 *	File:	vm/vm_init.c
 *	Author:	Avadis Tevanian, Jr., Michael Wayne Young
 *	Date:	1985
 *
 *	Initialize the Virtual Memory subsystem.
 */

#include <mach/machine/vm_types.h>
#include <mach/vm_map.h>
#include <kern/zalloc.h>
#include <kern/kalloc.h>
#include <kern/kext_alloc.h>
#include <sys/kdebug.h>
#include <vm/vm_object.h>
#include <vm/vm_map.h>
#include <vm/vm_page.h>
#include <vm/vm_kern.h>
#include <vm/memory_object.h>
#include <vm/vm_fault.h>
#include <vm/vm_init.h>

#include <pexpert/pexpert.h>

#include <vm/vm_protos.h>

#define ZONE_MAP_MIN CONFIG_ZONE_MAP_MIN

/* Maximum zone size is 1.5G */
#define ZONE_MAP_MAX (1024 * 1024 * 1536)

const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;

boolean_t vm_kernel_ready = FALSE;
boolean_t kmem_ready = FALSE;
boolean_t kmem_alloc_ready = FALSE;
boolean_t zlog_ready = FALSE;
boolean_t iokit_iomd_setownership_enabled = TRUE;

vm_offset_t kmapoff_kaddr;
unsigned int kmapoff_pgcnt;

#if CONFIG_EMBEDDED
extern int log_executable_mem_entry;
#endif /* CONFIG_EMBEDDED */

static inline void
vm_mem_bootstrap_log(const char *message)
{
//	kprintf("vm_mem_bootstrap: %s\n", message);
	kernel_debug_string_early(message);
}

/*
 *	vm_mem_bootstrap initializes the virtual memory system.
 *	This is done only by the first cpu up.
 */

void
vm_mem_bootstrap(void)
{
	vm_offset_t     start, end;
	vm_size_t zsizearg;
	mach_vm_size_t zsize;

	/*
	 *	Initializes resident memory structures.
	 *	From here on, all physical memory is accounted for,
	 *	and we use only virtual addresses.
	 */
	vm_mem_bootstrap_log("vm_page_bootstrap");
	vm_page_bootstrap(&start, &end);

	/*
	 *	Initialize other VM packages
	 */

	vm_mem_bootstrap_log("zone_bootstrap");
	zone_bootstrap();

	vm_mem_bootstrap_log("vm_object_bootstrap");
	vm_object_bootstrap();

	vm_kernel_ready = TRUE;

	vm_mem_bootstrap_log("vm_map_init");
	vm_map_init();

	vm_mem_bootstrap_log("kmem_init");
	kmem_init(start, end);
	kmem_ready = TRUE;
	/*
	 * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
	 * stack addresses. (With a 4K page and 9 bits of randomness, this
	 * eats at most 2M of VA from the map.)
	 */
	if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt,
	    sizeof(kmapoff_pgcnt))) {
		kmapoff_pgcnt = early_random() & 0x1ff; /* 9 bits */
	}
	if (kmapoff_pgcnt > 0 &&
	    vm_allocate_kernel(kernel_map, &kmapoff_kaddr,
	    kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_OSFMK) != KERN_SUCCESS) {
		panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt);
	}

#if CONFIG_EMBEDDED
	PE_parse_boot_argn("log_executable_mem_entry",
	    &log_executable_mem_entry,
	    sizeof(log_executable_mem_entry));
#endif /* CONFIG_EMBEDDED */

	vm_mem_bootstrap_log("pmap_init");
	pmap_init();

	kmem_alloc_ready = TRUE;

	if (PE_parse_boot_argn("zsize", &zsizearg, sizeof(zsizearg))) {
		zsize = zsizearg * (1024ULL * 1024);
	} else {
		zsize = sane_size >> 2;         /* Set target zone size as 1/4 of physical memory */
#if defined(__LP64__)
		zsize += zsize >> 1;
#endif /* __LP64__ */

#if !CONFIG_EMBEDDED
		/*
		 * The max_zonemap_size was based on physical memory and might make the
		 * end of the zone go beyond what vm_page_[un]pack_ptr() can handle.
		 * To fix that we'll limit the size of the zone map to be what a 256Gig
		 * machine would have, but we'll retain the boot-args-specified size if
		 * it was provided.
		 */
		vm_size_t       orig_zsize = zsize;

		if (zsize > 256 * (1024ULL * 1024 * 1024) / 4) {
			zsize = 256 * (1024ULL * 1024 * 1024) / 4;
			printf("NOTE: zonemap size reduced from 0x%lx to 0x%lx\n",
			    (uintptr_t)orig_zsize, (uintptr_t)zsize);
		}
#endif
	}

	if (zsize < ZONE_MAP_MIN) {
		zsize = ZONE_MAP_MIN;   /* Clamp to min */
	}
	if (zsize > sane_size >> 1) {
		zsize = sane_size >> 1; /* Clamp to half of RAM max */
	}
#if !__LP64__
	if (zsize > ZONE_MAP_MAX) {
		zsize = ZONE_MAP_MAX;   /* Clamp to 1.5GB max for K32 */
	}
#endif /* !__LP64__ */

	vm_mem_bootstrap_log("kext_alloc_init");
	kext_alloc_init();

	vm_mem_bootstrap_log("zone_init");
	assert((vm_size_t) zsize == zsize);
	zone_init((vm_size_t) zsize);   /* Allocate address space for zones */

	/* The vm_page_zone must be created prior to kalloc_init; that
	 * routine can trigger zalloc()s (for e.g. mutex statistic structure
	 * initialization). The vm_page_zone must exist to saisfy fictitious
	 * page allocations (which are used for guard pages by the guard
	 * mode zone allocator).
	 */
	vm_mem_bootstrap_log("vm_page_module_init");
	vm_page_module_init();

	vm_mem_bootstrap_log("kalloc_init");
	kalloc_init();

	vm_mem_bootstrap_log("vm_fault_init");
	vm_fault_init();

	vm_mem_bootstrap_log("memory_manager_default_init");
	memory_manager_default_init();

	vm_mem_bootstrap_log("memory_object_control_bootstrap");
	memory_object_control_bootstrap();

	vm_mem_bootstrap_log("device_pager_bootstrap");
	device_pager_bootstrap();

	vm_paging_map_init();

	vm_mem_bootstrap_log("vm_mem_bootstrap done");

#ifdef  CONFIG_ZCACHE
	zcache_bootstrap();
#endif
	vm_rtfault_record_init();

	PE_parse_boot_argn("iokit_iomd_setownership_enabled", &iokit_iomd_setownership_enabled, sizeof(iokit_iomd_setownership_enabled));
	if (!iokit_iomd_setownership_enabled) {
		kprintf("IOKit IOMD setownership DISABLED\n");
	} else {
		kprintf("IOKit IOMD setownership ENABLED\n");
	}
}

void
vm_mem_init(void)
{
	vm_object_init();
}