Dsxvm

[karaoui]

This page explain how to describe the hardware in Dsx-vm.

General description

We first start by creating a Hardware object:

Hardware(cluster_x, cluster_y, nb_proc)

• cluster_x : number of cluster in the abscisse axe (int)
• cluster_y : number of cluster in the ordinate axe (int)
• nb_proc : number of proc by cluster

Both cluster_x and cluster_y parameter represent the number of cluster in the platform. If you have a non-clustered platform, you should then set each value to 1.

Peripehrals

Once we have described the platform, we could attach different peripheral to it:

• TIMER : a timer peripheral, useful for the scheduling of the processors Timer(name, pbase, channel_size, nb_channel)
• ICU : a concentrator of interrupt line, mandatory if we got irqs on the platform ICU(name, pbase, channel_size, nb_channel)
• XICU : a concentrator of interrupt line and a timer, this component and the couple Timer/Icu? can't be in the same platform XICU(name, pbase, channel_size, nb_channel)
• Dma : a dma Dma(name, pbase, channel_size, nb_channel)
• Tty : a multi-tty terminal Tty(name, pbase, channel_size, nb_channel)
• Fbf : a frame-buffer Fbf(name, pbase, channel_size, nb_channel)
• RAM : a RAM memory RAM(name, pbase, size)
• ROM : a ROM memory, we must have one at 0xbfc00000 address with the a minimal size of 0x1000 ROM(name, pbase, size)
• MwmrCoprocTaskWrapper? : declare a coproc which is able to simulate the a C task by wrapping it in a SystemC coproc. The coproc (a SystemC module) will only be generated if a task have been mapped MwmrCoprocTaskWrapper?(name, pbase, channel_size, nb_channel, sc_name)

The parameters are the following:

• name : name of the component
• pbase : physical base address of the component
• channel_size : the size of one channel, or the size of the component if it doesn't support multiple channel
• nb_channel : number of channel, set to '1' if no channel
• size : size of the memory
• sc_name : the SystemC name of the coproc

Irqs

This is a special component able who is able to describe the the routing of the interrupt line.

• Irq(proc_id, cluster_id, icu_irq_id, peri, channel_id)
  • proc_id : the proc_id at which the irq is attached
  • icu_id : the icu_id line at which the irq is attached
  • cluster_id : the cluster_id which contain the proc, icu and the peri
  • peri : the class of the peripheral from which the request is sent
  • channel_id : the channel_id of the peripheral

Here's an example for a one cluster platform:

Another example for a multi-cluster platform: