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这是一个不到2000行的操作系统,巧妙地利用ARM9 CPU的内存管理单元(MMU)实现进程的切换。ARM9的4G虚拟地址可分成128个进程空间,每个32M。虽...
这是一个不到2000行的操作系统,巧妙地利用ARM9 CPU的内存管理单元(MMU)实现进程的切换。ARM9的4G虚拟地址可分成128个进程空间,每个32M。虽然它们的虚拟地址(VA)都是0-(32M-1),但是对应的MVA(Modified vitual address,由虚拟地址VA和进程号PID组合而来)不一样,设置MVA对应的页表指向不同物理地址就可以很方便地让各进程运行空间相互隔开。代码很少,注释丰富,希望能对想理解操作系统、了解ARM体系结构的朋友有所帮助。
-This is a trip of less than 2000 operating system, cleverly using ARM9 CPU memory management unit (MMU) to achieve the switching process. ARM9 4G virtual address can be divided into 128 process space, each 32M. While their virtual address (VA) are 0- (32M-1), but the corresponding MVA (Modified Virtual address, and by the virtual address VA and the process of portfolio from PID) not the same, set MVA corresponding page table at the different physical address can be very easy to let the the process of separating the mutual operation of space. Code rarely Notes rich, in hopes of understanding the operating system, understanding the ARM architecture friends help.
- 2023-01-15 10:50:03下载
- 积分:1
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基于DMX512协议在AT89S51单片机上的收发程序,并附有简单电路图,已在实际开发中应用。...
基于DMX512协议在AT89S51单片机上的收发程序,并附有简单电路图,已在实际开发中应用。-DMX512-based agreement on the single-chip transceiver AT89S51 procedures, together with a simple circuit, has been in the actual development application.
- 2023-05-03 05:00:03下载
- 积分:1
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三洋锁相环IC L72130的收音搜台驱动代码,
三洋锁相环IC L72130的收音搜台驱动代码,- Three oceans phase-locks surround IC L72130 the reception to
search for the actuation code,
- 2022-05-17 19:02:06下载
- 积分:1
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arm 指令集的详细解析 对于adi平台的嵌入式芯片内部有微指令集的芯片,这个文档是很有价值的...
arm 指令集的详细解析 对于adi平台的嵌入式芯片内部有微指令集的芯片,这个文档是很有价值的-arm instruction set for the detailed analysis of Patrick platform chip embedded within the task of the chip sets, this document is of great value
- 2022-01-30 11:19:43下载
- 积分:1
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ADS1241 ADS1241 procedures
ADS1241 ADS1241的程序-ADS1241 ADS1241 procedures
- 2022-03-30 04:54:35下载
- 积分:1
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S3C2440串口测试程序(ARM9)
ARM9芯片S3C2440的串口测试程序,亲测可用
- 2022-03-03 04:01:27下载
- 积分:1
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ARM7
ARM7-44B0的BIOS测试程序,本程序在我的44BO的试验板上成功跑通-ARM7-44B0 the BIOS test procedures, the procedures in my 44BO successfully run the test on-board pass
- 2022-08-12 19:37:42下载
- 积分:1
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参加飞思卡尔比赛时的智能车控制程序,供大家学习用,
参加飞思卡尔比赛时的智能车控制程序,供大家学习用,-Freescale competitions to participate in intelligent vehicle control procedures for them to learn to use,
- 2022-05-17 06:32:07下载
- 积分:1
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这也是ARM的一个调试用的源程序
这也是ARM的一个调试用的源程序-This is an ARM debug the source
- 2022-01-22 17:09:58下载
- 积分:1
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舵机(arm)
嵌入式arm舵机控制程序,可以控制舵机完成0-180的来回旋转,嵌入式arm舵机控制程序,可以控制舵机完成0-180的来回旋转,嵌入式arm舵机控制程序,可以控制舵机完成0-180的来回旋转
- 2022-03-31 15:31:04下载
- 积分:1