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<?xml version="1.0" encoding="gb2312"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"/><title>linux for ppc chapter 22 (last) jacobw </title></head><body><center><h1>BBS 水木清華站∶精華區</h1></center><a name="top"></a>發信人: plato (純真年代), 信區: Embedded <br />標 題: linux for ppc chapter 22 (last) <br />發信站: BBS 水木清華站 (Wed May 30 23:26:13 2001) <br /> <br />Next Previous Contents <br />---------------------------------------------------------------------------- <br />---- <br />22. Glossary <br />22.1 ABI - Application Binary Interface <br />The convention for register usage and C linkage commonly used on desktop Pow <br />erPC machines. Similar, but not identical to the EABI. <br />22.2 BDM - Background Debug Mode <br />An on-chip debugging interface, largely eliminating the need for expensive I <br />n Circuit Emulators. <br />22.3 CPM - Communications Processor Module <br />The magic communications co-processor in Motorola PowerQUICC devices. It con <br />tains SCCs and SMCs , and performs SDMA and IDMA. <br />22.4 CPU - Central Processor Unit <br />Depending on the context, this may refer to the PowerPC core itself, or the <br />physical processor device (including CPM, SIU, packaging etc) as a single un <br />it. <br />22.5 DMA - Direct Memory Access <br />A form a data transfer directly between memory and a peripheral or between m <br />emory and memory, without normal program intervention. <br />22.6 EABI - Embedded Application Binary Interface <br />The convention for register usage and C linkage commonly used on embedded Po <br />werPC machines, derived from the ABI. <br />22.7 FEC - Fast Ethernet Controller <br />The 100 Mbps (100Base) Ethernet controller, present on 'T' devices such as t <br />he 860T and 855T. <br />22.8 GPL/LGPL - GNU General Public License/Lesser General Public License <br /><a href="http://www.gnu.org/copyleft/gpl.html">http://www.gnu.org/copyleft/gpl.html</a> <br />The licenses under which the Linux kernel and much of the utility and librar <br />y code necessary to build a complete system may be copied, distributed and m <br />odified. Each portion of the software is copyright by its respected copyrigh <br />t holder, and you must comply with the terms of the license in order to lega <br />lly copy (and hence use) it. One significant requirement is that you freely <br />redistribute any modifications you make; if you can't cope with this, embedd <br />ed Linux isn't for you. <br />22.9 IDMA - Independent DMA <br />A general purpose DMA engine with relatively limited throughput provided by <br />the microcoded CPM, for use with external peripherals or memory-to-memory tr <br />ansfers. <br />22.10 MII - Media Independent Interface <br />The IEEE Ethernet standard control interface used to communicate between the <br /> on-chip Ethernet controller and the external PHY. <br />22.11 MMU - Memory Management Unit <br />CPU component which maps kernel- and user-space virtual addresses to physica <br />l addresses, and is an integral part of Linux kernel operation. <br />22.12 PHY - Physical Interface <br />The IEEE Ethernet standard interface between the external physical layer tra <br />nsceiver and the on-chip ethernet controller in a PowerQUICC device. Often u <br />sed to refer to the external transceiver itself, the PHY is controlled more <br />or less transparently to software via the MII. <br />22.13 SCC - Serial Communications Controller <br />The high performance module(s) within the CPM which implement the lowest lay <br />er of various serial protocols, such as Asynchronous serial ( UART), 10 Mbps <br /> Ethernet, HDLC etc. <br />22.14 SDMA - Serial DMA <br />DMA used to transfer data to and from the SCCs. <br />22.15 SIU - System Interface Unit <br />Provides much of the external interfacing logic. It's the other major module <br /> on Motorola PowerQUICC devices alongside the CPU core and CPM. <br />22.16 SPI - Serial Peripheral Interface <br />A relatively simple synchronous serial interface for connecting low speed ex <br />ternal devices using minimal wires. <br />22.17 SMC - Serial Management Controller <br />A lower performance version of the SCCs with more limited functionality, par <br />ticularly useful for serial debug ports and low throughput serial protocols. <br /> <br />22.18 UART - Universal Asynchronous Receiver Transmitter <br />Generically, this refers to any device capable of implementing a variety of <br />asynchronous serial protocols, such as RS-232, HDLC and SDLC. In this contex <br />t, it refers to the operating mode of the SCCs which provides this functiona <br />lity. <br />22.19 UPM - User Programmable Machine <br />A highly flexible bus interfacing machine unit allowing external peripherals <br /> with an extremely wide variety of interfacing requirements to be connected <br />directly to the CPU. <br />---------------------------------------------------------------------------- <br />---- <br />Next Previous Contents <br /> <br />-- <br /> <br />※ 來源:·BBS 水木清華站 smth.org·[FROM: 166.111.161.8] <br /><a href="00000023.htm">上一篇</a><a href="javascript:history.go(-1)">返回上一頁</a><a href="index.htm">回到目錄</a><a href="#top">回到頁首</a></center><center><h1>BBS 水木清華站∶精華區</h1></center></body></html>?? 快捷鍵說明
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