This applies to 圆4 (which I think you're using?) too -snip-Ģ. #define GCC_PACKED _attribute_ ((packed)) My solution was an acpi table parser library, that's get called in every driver's init() method, but of course you can do things differently in your OS.
Also there's a chance that a new device would require such info that cannot be represented in your universal structure, and modifying a common structure would require a lot of work in every driver.
#DOTBOT SITEMAP DRIVER#
I thought parsing acpi tables into an universal driver structure would require more memory with only a little lookup performance benefit. Every driver parses the blocks that it's interested in (typically different info for different drivers), and it's only done once whenever a driver installed, so performance is not crutial. Maybe parsing the tables several times is not the best way to do things, but it's very easy and clear, also modular approach. every driver parse it to get it's device info, and because driver loading not restricted to boot time, I will need the tables later too.
#DOTBOT SITEMAP FREE#
I handle it as firmware rom, and do not free it ever, because: But according to the wiki, when (if) I am done with the ACPI tables, I can reclaim it? It really doesn't matter if unusable memory is an LFB MMIO space or ACPI tables or whatever from memory management point of view.
used by firmware, simply lost memory to kmalloc (cannot be freed) used by kmalloc, reusable memory allocated by your kmalloc (that can be freed) As a matter of fact, your memory allocator has to deal with only 3 types of memory: This way it does not matter whether you use E820 or GRUB map or EFI map (with fancy type codes), because you "translate" type codes too. Most OS devers specify their own map, and transform firmware provided map on boot. That is, there should be no overlaping, and should not contain free memory that was also reported non-free in another map record. Yes, you have to order the memory map records, and make them disjunct. More about this meta tag here.0x359A0 - 1 = 0x1 = 0x9F400 1) of memory to some virtual address that I can access from my 64-bit kernel (this is a loader) can I still access the memory map again, then re-evaluate the memory map (including translating it to some arbitrary format of mine?) And this tag should strictly be placed under your HEAD tag of the page. In order for this to be applied to your entire site, You will have to add this meta tag for all of your pages. The ugly:įrom the robots documentation for meta tags, You can use the following meta tag on all your pages on your site to let the Bots know that these pages are not supposed to be indexed. Which should yield the exact same results as the above two.
I don't care way:ĭo not create a /robots.txt altogether. Which will default to allow all for all type of Bots. User-agent: *Ĭreate a /robots.txt file with no content in it. Specify a global matcher with a disallow segment as mentioned by So your /robots.txt looks like this. But, here is my two cents for the sake of completeness.Īs per the official documentation, there are four ways, you can allow complete access for robots to access your site. I understand that this is fairly old question and has some pretty good answers.
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