1*5e3eaea3SApple OSS Distributions<h2>vm_machine_attribute</h2> 2*5e3eaea3SApple OSS Distributions<hr> 3*5e3eaea3SApple OSS Distributions<p> 4*5e3eaea3SApple OSS Distributions<strong>Function</strong> - Get/set the target memory region's special attributes. 5*5e3eaea3SApple OSS Distributions<h3>SYNOPSIS</h3> 6*5e3eaea3SApple OSS Distributions<pre> 7*5e3eaea3SApple OSS Distributions<strong>kern_return_t vm_machine_attribute</strong> 8*5e3eaea3SApple OSS Distributions <strong>(vm_task_t</strong> <var>target_task</var>, 9*5e3eaea3SApple OSS Distributions <strong>vm_address_t</strong> <var>address</var>, 10*5e3eaea3SApple OSS Distributions <strong>vm_size_t</strong> <var>size</var>, 11*5e3eaea3SApple OSS Distributions <strong>vm_machine_attribute_t</strong> <var>attribute</var>, 12*5e3eaea3SApple OSS Distributions <strong>vm_machine_attribute_val_t</strong> <var>value</var><strong>);</strong> 13*5e3eaea3SApple OSS Distributions</pre> 14*5e3eaea3SApple OSS Distributions<h3>PARAMETERS</h3> 15*5e3eaea3SApple OSS Distributions<dl> 16*5e3eaea3SApple OSS Distributions<p> 17*5e3eaea3SApple OSS Distributions<dt> <var>target_task</var> 18*5e3eaea3SApple OSS Distributions<dd> 19*5e3eaea3SApple OSS Distributions[in task send right] 20*5e3eaea3SApple OSS DistributionsThe port for the task in whose address space the 21*5e3eaea3SApple OSS Distributionsmemory object is to be manipulated. 22*5e3eaea3SApple OSS Distributions<p> 23*5e3eaea3SApple OSS Distributions<dt> <var>address</var> 24*5e3eaea3SApple OSS Distributions<dd> 25*5e3eaea3SApple OSS Distributions[in scalar] 26*5e3eaea3SApple OSS DistributionsThe starting address for the memory region. The granularity 27*5e3eaea3SApple OSS Distributionsof rounding of this value to page boundaries is implementation 28*5e3eaea3SApple OSS Distributionsdependent. 29*5e3eaea3SApple OSS Distributions<p> 30*5e3eaea3SApple OSS Distributions<dt> <var>size</var> 31*5e3eaea3SApple OSS Distributions<dd> 32*5e3eaea3SApple OSS Distributions[in scalar] 33*5e3eaea3SApple OSS DistributionsThe number of bytes in the region. The granularity of 34*5e3eaea3SApple OSS Distributionsrounding of this value to page boundaries is implementation dependent. 35*5e3eaea3SApple OSS Distributions<p> 36*5e3eaea3SApple OSS Distributions<dt> <var>attribute</var> 37*5e3eaea3SApple OSS Distributions<dd> 38*5e3eaea3SApple OSS Distributions[in scalar] 39*5e3eaea3SApple OSS DistributionsThe name of the attribute to be get/set. Possible values are: 40*5e3eaea3SApple OSS Distributions<dl> 41*5e3eaea3SApple OSS Distributions<p> 42*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_CACHE</strong> 43*5e3eaea3SApple OSS Distributions<dd> 44*5e3eaea3SApple OSS DistributionsCachability. Aside from the generic values listed below, the 45*5e3eaea3SApple OSS Distributionsfollowing special values are defined: 46*5e3eaea3SApple OSS Distributions<dl> 47*5e3eaea3SApple OSS Distributions<p> 48*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_VAL_CACHE_FLUSH</strong> 49*5e3eaea3SApple OSS Distributions<dd> 50*5e3eaea3SApple OSS DistributionsFlush from all caches 51*5e3eaea3SApple OSS Distributions<p> 52*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_VAL_DCACHE_FLUSH</strong> 53*5e3eaea3SApple OSS Distributions<dd> 54*5e3eaea3SApple OSS DistributionsFlush from data caches 55*5e3eaea3SApple OSS Distributions<p> 56*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_VAL_ICACHE_FLUSH</strong> 57*5e3eaea3SApple OSS Distributions<dd> 58*5e3eaea3SApple OSS DistributionsFlush from instruction caches 59*5e3eaea3SApple OSS Distributions</dl> 60*5e3eaea3SApple OSS Distributions<p> 61*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_MIGRATE</strong> 62*5e3eaea3SApple OSS Distributions<dd> 63*5e3eaea3SApple OSS DistributionsMigratability. 64*5e3eaea3SApple OSS Distributions<p> 65*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_REPLICATE</strong> 66*5e3eaea3SApple OSS Distributions<dd> 67*5e3eaea3SApple OSS DistributionsReplicability. 68*5e3eaea3SApple OSS Distributions</dl> 69*5e3eaea3SApple OSS Distributions<p> 70*5e3eaea3SApple OSS Distributions<dt> <var>value</var> 71*5e3eaea3SApple OSS Distributions<dd> 72*5e3eaea3SApple OSS Distributions[pointer to in/out scalar] 73*5e3eaea3SApple OSS DistributionsThe new value for the attribute. The old value 74*5e3eaea3SApple OSS Distributionsis also returned in this variable. The new value can be a specific value 75*5e3eaea3SApple OSS Distributionslisted above, or one of the following generic values: 76*5e3eaea3SApple OSS Distributions<dl> 77*5e3eaea3SApple OSS Distributions<p> 78*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_VAL_OFF</strong> 79*5e3eaea3SApple OSS Distributions<dd> 80*5e3eaea3SApple OSS DistributionsTurn attribute off. 81*5e3eaea3SApple OSS Distributions<p> 82*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_VAL_ON</strong> 83*5e3eaea3SApple OSS Distributions<dd> 84*5e3eaea3SApple OSS DistributionsTurn attribute on. 85*5e3eaea3SApple OSS Distributions<p> 86*5e3eaea3SApple OSS Distributions<dt> <strong>MATTR_VAL_GET</strong> 87*5e3eaea3SApple OSS Distributions<dd> 88*5e3eaea3SApple OSS DistributionsNo change, just return current value. 89*5e3eaea3SApple OSS Distributions</dl> 90*5e3eaea3SApple OSS Distributions</dl> 91*5e3eaea3SApple OSS Distributions<h3>DESCRIPTION</h3> 92*5e3eaea3SApple OSS Distributions<p> 93*5e3eaea3SApple OSS DistributionsThe <strong>vm_machine_attribute</strong> function gets and sets special 94*5e3eaea3SApple OSS Distributionsattributes of the 95*5e3eaea3SApple OSS Distributionsmemory region implemented by the underlying <strong>pmap</strong> module. These attributes 96*5e3eaea3SApple OSS Distributionsare properties such as cachability, migratability and replicability. 97*5e3eaea3SApple OSS DistributionsThe behavior of this function is machine dependent. 98*5e3eaea3SApple OSS Distributions<h3>NOTES</h3> 99*5e3eaea3SApple OSS Distributions<p> 100*5e3eaea3SApple OSS DistributionsThis interface is machine word length specific because of the virtual address 101*5e3eaea3SApple OSS Distributionsparameter. 102*5e3eaea3SApple OSS Distributions<h3>RETURN VALUES</h3> 103*5e3eaea3SApple OSS Distributions<dl> 104*5e3eaea3SApple OSS Distributions<p> 105*5e3eaea3SApple OSS Distributions<dt> <strong>KERN_INVALID_ADDRESS</strong> 106*5e3eaea3SApple OSS Distributions<dd> 107*5e3eaea3SApple OSS DistributionsThe address is illegal or specifies a non-allocated region. 108*5e3eaea3SApple OSS Distributions</dl> 109*5e3eaea3SApple OSS Distributions<h3>RELATED INFORMATION</h3> 110*5e3eaea3SApple OSS Distributions<p> 111*5e3eaea3SApple OSS DistributionsFunctions: 112*5e3eaea3SApple OSS Distributions<a href="vm_wire.html"><strong>vm_wire</strong></a>. 113