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<a href='../S/94.html#L68'>LOW_MEM</a>            68 mm/memory.c    #define MAP_NR(addr) (((addr)-LOW_MEM)&gt;&gt;12)	// 指定内存地址映射为页号。
<a href='../S/94.html#L115'>LOW_MEM</a>           115 mm/memory.c    "1:": "=a" (__res): "" (0), "i" (LOW_MEM), "c" (PAGING_PAGES), "D" (mem_map + PAGING_PAGES - 1):"di", "cx",
<a href='../S/94.html#L132'>LOW_MEM</a>           132 mm/memory.c      if (addr &lt; LOW_MEM)
<a href='../S/94.html#L136'>LOW_MEM</a>           136 mm/memory.c      addr -= LOW_MEM;		// 物理地址减去低端内存位置，再除以4KB，得页面号。
<a href='../S/94.html#L277'>LOW_MEM</a>           277 mm/memory.c    	  if (this_page &gt; LOW_MEM)
<a href='../S/94.html#L283'>LOW_MEM</a>           283 mm/memory.c    	      this_page -= LOW_MEM;
<a href='../S/94.html#L314'>LOW_MEM</a>           314 mm/memory.c      if (page &lt; LOW_MEM || page &gt;= HIGH_MEMORY)
<a href='../S/94.html#L317'>LOW_MEM</a>           317 mm/memory.c      if (mem_map[(page - LOW_MEM) &gt;&gt; 12] != 1)
<a href='../S/94.html#L352'>LOW_MEM</a>           352 mm/memory.c      if (old_page &gt;= LOW_MEM &amp;&amp; mem_map[MAP_NR (old_page)] == 1)
<a href='../S/94.html#L364'>LOW_MEM</a>           364 mm/memory.c      if (old_page &gt;= LOW_MEM)
<a href='../S/94.html#L499'>LOW_MEM</a>           499 mm/memory.c      if (phys_addr &gt;= HIGH_MEMORY || phys_addr &lt; LOW_MEM)
<a href='../S/94.html#L522'>LOW_MEM</a>           522 mm/memory.c      phys_addr -= LOW_MEM;
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