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flone_sa
Total Points:
40
Registered User
September 15, 2009 2:44 AM PDT
Invoke ACPI methods
Hello,

I'm currently trying to understand at least a minimum how ACPI works. After unsuccessful googling about how to invoke ACPI methods, i'm begging some help here.

So, here are my wonderings :
1. Are the ACPI registers (i.e PM1a_CNT) all accessible via PIO ? If there are some in MMIO? In that case, how can i know if they can be accessed via MMIO or PIO ?
2. How can i call an ACPI method (like \_OSI for example) ? Has anyone a C sample program with the invocation of an ACPI method ?
3. Do you have any references (easy to understand) that i can read to implement a driver that uses ACPI ?

Thanks a lot.

Fernand
Gina Harris (Intel)
Total Points:
115
Status Points:
65
Green Belt
October 26, 2009 12:08 PM PDT
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#1
Quoting - flone_sa
Hello,

I'm currently trying to understand at least a minimum how ACPI works. After unsuccessful googling about how to invoke ACPI methods, i'm begging some help here.

So, here are my wonderings :
1. Are the ACPI registers (i.e PM1a_CNT) all accessible via PIO ? If there are some in MMIO? In that case, how can i know if they can be accessed via MMIO or PIO ?
2. How can i call an ACPI method (like \_OSI for example) ? Has anyone a C sample program with the invocation of an ACPI method ?
3. Do you have any references (easy to understand) that i can read to implement a driver that uses ACPI ?

Thanks a lot.

Fernand

Hello Fernand,

There is some ACPI information on www.intel.com at http://www.intel.com/technology/iapc/acpi/. This page in turn leads to the ACPI web site, where you may be able to find more information.

Regards,

Gina H.
Intel(R) Software Network Support


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