Hi, Guenter,



On 25 May 2015 at 01:32, Guenter Roeck [off-list ref] wrote:

On 05/24/2015 10:19 AM, Timur Tabi wrote:

quoted

Fu Wei wrote:

quoted

I don't know why you want to do this tricky way.  you can always
register the interrupt handler,
if pre-timeout is 0, system will just trigger WS1 right after WS0

But that only works if the pre-timeout and timeout can be programmed to
separate values.  And as Guenter says, the SBSA may not guarantee that.

The pseudo-code in the specification suggests that if WCV is configured,
        WS0 = WCV
        WS1 = WCV + WOR

Assuming that the implementation follows the pseudo-code in the
specification,
we would have separately programmable values. Since the pretimeout (per ABI)
is the difference in seconds to the timeout, and not an absolute value,
we would have to program the registers as follows.

        WCV = timeout - pretimeout;
        WOR = pretimeout;

yes, this patchset is doing this way.

Does this make sense ?

Thanks,
Guenter

-- 
Best regards,

Fu Wei
Software Engineer
Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
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