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Re: [Qemu-devel] Help writing a trivial device

From: Lluís Vilanova
Subject: Re: [Qemu-devel] Help writing a trivial device
Date: Tue, 27 Sep 2011 15:05:59 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Zhi Yong Wu writes:

> 2011/9/26 Lluís Vilanova <address@hidden>:
>> The testing system is a Linux 2.6.32, with this:
>> int fd = open("/sys/devices/pci0000:00/000000:00:004.00/resource0", O_RDWR);
>> void *addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
>> printf("-> %ld\n", *(uint64_t*)addr);
> This is the way about how to test bar? Does bar1 correspond to guest
> file /sys/devices/pci0000:00/000000:00:004.00/resource0?

In linux, resourceN corresponds to the Nth BAR.


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