解析 一种是逻辑地址( Logical Address):允许在程序中编排的地址。一种是物理地址( Physical Address):信息在存健器 中实际存故的地址。 一种是逻辑地址( Logical Address):允许在程序中编排的地址。一种是物理地址( Physical Address):信息在存健器 中实际存故的地址。
Logical vs physical address 1) Anaddress generated by the CPUis a logical address. Whereas, anaddress seen by the memory unit, that is, the one loaded into the memory-address register of the memory, is aphysical address. 2) The user program never sees the physical addresses. The program ...
由此个人认为PPHYSICAL_ADDRESS LogicalAddress 这种定义只是微软命名习惯上的差异,这里的LogicalAddress就是物理地址而并非传统意义上的逻辑地址。
DMA操作前需要分配物理地址连续的一个Buffer,AllocateCommonBuffer函数提供了这个功能,该函数原型如下: PVOID AllocateCommonBuffer( _In_ PDMA_ADAPTER DmaAdapter, _In_ ULONG Length, _Out_ PPHYSICAL_ADDRESS LogicalAddress, _In_ BOOLEAN CacheEnabled ); 第三个参数有点不是很能理解,PPHYSICAL_ADDRESS Logical...
3.What is Physical Address 4.Side by Side Comparison – Logical Address vs Physical Address in Tabular Form 5.Summary What is Logical Address? CPU generates logical address. From the perspective of a program that is running, an item seems to be located at the address provided by the logical...
第三个参数有点不是很能理解,PPHYSICAL_ADDRESS LogicalAddress,至少从定义的变量名上看,微软似乎在暗示我:逻辑地址和物理地址是相同的这样一个事实。 虚拟地址到物理地址的转化方法是与体系结构相关的。有分段、分页两种方式。x86 cpu下分段分页都是支持的。MMU负责从虚拟地址到物理地址的转化。逻辑地址是段标识+段...
"false"memory,forexample,a0x08000000memoryaddress,it isnotjustthephysicaladdressofthebigarrayin0x08000000 -1elementsthataddress; Thereasonisthatmodernoperatingsystemsprovideamemory managementimage,virtualmemory(virtual,memory).The processusestheaddressinthevirtualmemorytoassistthe ...
Disclosed is a distributed logical address and physical address conversion apparatus. The apparatus comprises: a server on a main control board and a client on a controlled board; the server is used for obtaining current board configuration information of a system, saving the board configuration ...
The Logical Address is generated by the CPU while the program is running, whereas the Physical Address is the location inside the main memory. The Logical Address is virtual, while the Physical Address is the actual address of the memory....
a linear address to a physical address, as shown in Figure 11–9: 1. The linear address references a location in the linear address space. 2. The 10-bit directory field in the linear address is an index to a page-directory entry. The pagedirectory ...