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Archive for May 31st, 2016

The UVM Configuration Database

Tuesday, May 31st, 2016

When I want to wear a certain clothing item, I take out it of the closet. When I go shopping, I add those clothes it to my closet and there are now new items for me to pick out in the future. A database works much the same way, a collection of information that is stored and accessed on demand.

Take the UVM configuration database for example. It basically acts as a repository so that when the time comes, certain portions of the UVM testbench can be obtained from the database and used to build the structure.

When items are placed in the database with a set() method (uvm_config_db::set()), components in lower levels will call the get() method in order to obtain the necessary parts to build the verification framework.

Sharing an interface

If I were to ‘set’ an interface from my top level into the database while simultaneously giving it an identifying name, officially referred to as the ‘field name’, I could later use the field name to retrieve that interface in my driver to connect to the DUT by calling the get() method (uvm_config_db::get()).

Fig. 1) Setting the interface in the configuration database using an identifier ‘my_identifier’

Fig. 2) In order to connect a monitor or driver to the dut, the get() function will need to be called to access the interface in the respective build phase.

Setting up configurations

If I wanted to change or modify my testbench structure, I could create a ‘configuration’. In my configuration, I could specify some rules as to what components I want my testbench to have. If I am designing a processor where I’ve already loaded up the memory with instructions, there’s no need to generate stimulus, therefore I could eliminate the driver and sequencer.

This is what UVM refers to as passive and active modes. Passive mode is where only a monitor exists to observe data and active mode is where a driver and sequencer are needed to generate stimulus. Placing certain variables in the configuration database can help to determine whether the testbench is setup as passive or active.

In order to declare the testbench as passive or active, a configuration object is created. The built in uvm_active_passive_enum data type is used to indicate whether the testbench is UVM_ACTIVE or UVM_PASSIVE.

Fig. 3) An example configuration

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Tags: Riviera-PRO, simulation, uvm, verification
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Vegetarian Dining in Austin – DAC 2016

Tuesday, May 31st, 2016

I moved to Austin a little over a year ago, and have quickly learned that this city is a progressive blue island in a sea of red. That’s the conventional wisdom, and most of the time it holds up.

But there’s one area where this Texas city feels right at home in the rest of the Lone Star State, and that’s the cuisine. Go into the almost any trendy restaurant, and it’s possible to order a meal that has bacon in everything. Whether it’s the Paleo influence, or the craft food movement, or a remnant of good old Southern cooking, there are a lot of meaty options.

That’s great, you say, except I don’t care how ethically sourced the pork is. Dude, I’m a vegetarian.

Never fear. If you plan to visit our fair city for our industry’s upcoming Design Automation Conference (DAC 2016), rest assured you can find great vegetarian dining options in and around downtown Austin. And while UBER may have left Austin, you can still walk or catch a cab from your hotel or the Convention Center to visit these great restaurants (scroll down for map).

Mainstream Options: You’re a Vegetarian, But the Rest of Your Party Wants Meat

A. The Flagship Whole Foods, one mile west of downtown Austin, is a great place for a working lunch. I know, you’re thinking, You want me to eat at a grocery store? This is not just any grocery store, my friend. It is a food bazaar that will absolutely blow you away. Rows of tempting salad bars allow you to compose your own meal, but there are also vegan and vegetarian options at just about every food counter and a pleasant roof-top terrace where you can enjoy your food. Whole Foods Market. 525 North Lamar, Austin, Texas. 512.542.2200. $

B. 24 Diner, like many Austin restaurants, was featured on the Food Network, with the result that this trendy spot can be mobbed. Its allure is comforting food served all night long, with plenty of vegetarian options, like veggie hash, mushroom and veggie burgers, and a variety of tempting salads. 24 Diner. 600 Lamar. 512.472.5400. $$

C. I love the intimacy of Koriente, a Korean health food restaurant with garden dining tucked into a little warren of shops and restaurants at the east end of Sixth Street, right before you hit the I 35 overpass. It was founded by a mom who hated to cook and wanted to make a place where other moms could bring their families for nourishing, healthy, delicious food. Most of the entrees are vegetable based; for a couple extra bucks, add meat and eggs to the mix. But you might want to walk over from your hotel. Parking is at a minimum here. Koriente. 621 East 7th. 512.275.0852. $

D. The Blue Dahlia Bistro is right across the highway in the heart of East Austin, still walking distance from downtown. The restaurant’s promise is that you can “relax and feel like you are in the European countryside.” That might be a tiny stretch, but I have to admit — they do have a truly cozy and inviting outdoor space. They serve yummy French-inspired dishes and have a good selection of vegetarian options, including an all-day breakfast menu. The Blue Dahlia.1115 East 11th Street. 512.542.9542. $

Hardcore and Retro: You Won’t Find Meat on Any of These Plates

E. If you’re looking for a glimpse of the Austin of Slackerfame, venture a few miles north to the University neighborhood of Hyde Park, where Mother’s Cafe has been dishing up family style vegetarian and vegan cuisine since 1980. The restaurant has spruced up with a recent makeover, but they haven’t really changed their menu. There’s nowhere else in town where you can order Mushroom Stroganoff or BBQ Tofu. Ask to be seated in the Garden Room, an Austin tradition. Mother’s Cafe. 4215 Duval. 512.451.3994. $

F. Casa de Luz, located about a half mile from downtown, in the hippest part of East Austin, describes itself as Austin’s “only all-organic dining and community center.” They take good nutrition very seriously here; even the drinking water that serve is filtered to remove fluoride. Each day, they prepare a different menu from scratch, using plant-based foods. That means most of the food they serve is vegan as well. Casa de Luz. 1701 Toomey Road. 512).476.2535. $

G. Mr. Natural lets you enjoy Tex-Mex cuisine without worrying that someone is sticking lard in those beans. The East Austin restaurant is 100 percent vegetarian, and the place also includes a juice bar and a bakery that has won several awards, including “Best Tres Leches” from the Austin Chronicle.That is really saying something: the recipe is vegan. Mr. Natural. 1901 Cesar Chavez. 512.477.5228. $

H. There aren’t a lot of 100 percent vegan options in the Weird City, but East Austin Counter Culturefits the bill. Whenever possible, the chefs here try to use ethically sourced and organic ingredients, and their menu is a combination of classic vegetarian dishes like Lentil Loaf and Mac and Cheeze (the “cheese” made from cashews) and curiosity-inspiring fare such as the Jackfruit BBQ Sandwich. They also serve gluten-free pizza. Counter Culture.2337 East Cesar Chavez. 512.524.1540.

Quick and Trendy Veggie Bites

I. You can’t talk about food in Austin without at least a nod to one of the city’s many food trucks. Arlo’s is the place to go downtown for a late night vegan burger or seiten “chicken” patty. You want fries with that? No problem. Arlo’s. 900 Red River. 512.840.1600. $

J. And for dessert? Lick Honest Ice Creams offers a variety of “weird” flavors — I love the roasted beet and fresh mint — including some vegan options. The staff lets folks sample as many flavors as they like, so the line might move slowly!, Suite 1135. 512.363.5622. $

Well there you have it. You see, if you’re a vegetarian or looking to have a meal with vegetarian colleague or client, Austin has you covered.

I hope you’ll find these tips useful. If you have any other questions about our fair city, please stop by and see me at DAC Booth #619. If you’d like to learn more about Aldec’s Scalable Emulation Solutions or ASIC Verification Spectrum, I hope you’ll register for a one-on-one presentation at DAC, or call +1-702-990-4400 or email us at sales@aldec.com.