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[Qemu-devel] question about irq update
From: |
Zhi Hui Li |
Subject: |
[Qemu-devel] question about irq update |
Date: |
Fri, 15 Jun 2012 16:42:28 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 |
In the code of libqtest.c have a function :
bool qtest_get_irq(QTestState *s, int num)
{
/* dummy operation in order to make sure irq is up to date */
qtest_inb(s, 0);
return s->irq_level[num];
}
but I don't know how it can make the irq up to date
and why we will read from the address of 0 ?
can anybody explain for me?
Thank you very much!
- [Qemu-devel] question about irq update,
Zhi Hui Li <=