imoninit.htm

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

			<title>SerialICE Monitor Initialization</title>
			<h1 align=center>SerialICE Monitor Initialization</h1>

<!--INDEX "SerialICE Monitor Initialization" -->

Here is a brief description of what happens when the SerialICE Monitor
boots (jal is a subroutine call).<p>

</dl><h2>_start: (<a href="../imon/mips.s">imon/mips.s</a>)</h2><dl><dd>
<!--INDEX hostInit -->
  <dl><dt><b>
  jal <a href="../lib/cpuinit.s">cpuInit</a></b><dd>
	This calls getmachtype and then sets up the DRAM and returns
	a pointer to the correct cache flush routine.<dt><b>
  jal r4001_flush</b><dd>
	Calls the correct flush routine to flush the Dcache. In this
	case it is for the 4001.<dt><b>
  jal <a href="../lib/cpdata.s">cpdata</a></b><dd>
	Copies the .data section from the PROM to the DRAM.<dt><b>
  jal <a href="../lib/clrbss.s">clrbss</a></b><dd>
	Clears the .bss section in DRAM.<dt><b>
  jal copyHandler</b><dd>
	Copies the exception handler to the exception vector in DRAM.<dt><b>
  jal copyHandler</b><dd>
	Copies the exception handler to the exception vector in DRAM.<dt><b>
  jal r4001_flush</b><dd>
	Calls the correct flush routine to flush the Dcache. In this
	case it is for the 4001.<dt><b>
  jal r4001_flush</b><dd>
	Calls the correct flush routine to flush the Icache. In this
	case it is for the 4001.<dt><b>
  jal imoninit</b><dd>
	Calls imoninit, this is the first piece of C. At this point
	   IMON switches to kseg0 addresses.
	</dl>

</dl><h2>imoninit() (<a href="../imon/main.c">imon/main.c</a>)</h2><dl><dd>
<!--INDEX imoninit -->
  <dl><dt><b>
  jal getHostType</b><dd>
	Calls getHostType to set the global variable hostType.
	<dt><b>
  jal mfc0</b><dd>
	Uses mfc0() to read the Status register (C0_SR).
	This is the first time that DRAM is assumed to be working.
	If DRAM is not working, control will not return from this
	call.<dt><b>
  jal bzero  </b><dd>
	Clears the first 32 words of the driver load area (80020000..).
	<dt><b>
  jal <a href="../lib/hostinit.c">hostInit(8)</a></b><dd>
	Initialize the DUART. This calls 
	<a href="../lib/termio.c">addDevice</a>, which calls the OP_INIT 
	section of the driver.<dt><b>
  jal <a href="../mon/cli.c">moninit</a></b><dd>
	Initializes the core Monitor.<dt><b>
  jal <a href="../mon/cli.c">addCmdRec</a></b><dd>
	Called several times. Adds PMON-specific commands to the Monitor.
	<dt><b>
  jal <a href="../mon/set.c">addEnvRec</a></b><dd>
	Called several times. Adds PMON-specific environment variables 
	to the Monitor.  <dt><b>
  jal sprintf -- do_cmd</b><dd>
	This pair of functions is called twice. They set two
	environment variables.
	<dt><b>
  jal printf </b><dd>
	Print the first part of the banner.
	</dl>

</dl><p><hr>
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