Re: [coreboot] How to trigger SMI and implement SMM

2015-07-31 Thread Stefan Reinauer 
* Yu-Cheng Liu peter90...@gmail.com [150721 11:04]:
 Hello,
 
 I purpose to trigger SMI event and do something in SMM mode .
 
  
 
 I trace the coreboot source code and found that, during the coreboot
 environment setup, the file locate at southbridge/intel/i82801ix/smi.c  will 
 be
 excute. Is it enough for SMI/SMM operation?

That is just the code that installs the SMM handler (well, part of it)

 I didn’t see the code under cpu/smm be locate in the ramstage.debug symbol.

The SMM handler is a separate module.

 What is the different purpose between southbridge/intel/i82801ix/smi.c and 
 /cpu
 /x86/smm?

The code in southbridge/intel/i82801ix/smi.c is the chipset specific SMI
initialization. southbridge/intel/i82801ix/smihandler.c is the chipset
specific SMI handler.

The code under cpu/x86/smm is generic for the x86 architecture.

 How do I trigger the SMI event?

Typically hardware triggers an SMI, e.g. on a GPE event, timeout, or
such. See southbridge/intel/i82801ix/smihandler.c for a more
comprehensive list of southbridge SMI sources.

You can also use the APMC SMI command mechanism to manually trigger
SMIs, see southbridge_smi_apmc(void) for details.

Stefan

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[coreboot] How to trigger SMI and implement SMM

2015-07-25 Thread Yu-Cheng Liu 
Hello,

I purpose to trigger SMI event and do something in SMM mode .



I trace the coreboot source code and found that, during the coreboot
environment setup, the file locate at *southbridge/intel/i82801ix/smi.c*
 will be excute. Is it enough for SMI/SMM operation? I didn’t see the code
under cpu/smm be locate in the ramstage.debug symbol.

What is the different purpose between *southbridge/intel/i82801ix/smi.c* and*
/cpu/x86/smm*? How do I trigger the SMI event?

(my platform is QEMU and Coreboot main board is “emulation”)



Thanks for your kindly reply ~
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