Why “integrated”? Because at lower nodes, you have to integrate other parts of the flow. Sign-off (you can see power and timing buttons below), clock tree synthesis (you can see synthesis button) must be integrated, so we have a fully integrated PnR flow that we built from day one.
a RISC-V cpu core is being placed using end-to-end opensource EDA tool. This is possible due constant effort and dedication by so many visionary people in industry, and will let you know all details about all of them very soon.
In on opensource RISC-V implementation flow, you move from right (Hardware) to Left (application program), and then coming from left, if you stop at middle (RISC-V ISA), that’s when you start thinking about this architecture from all angles, like sta, drc, congestion, clock skew, io latency, static and dynamic power, IR and many more
ABI (application binary interface), as the name says, is an interface, that helps programs access system hardware and services.RISC-V architecture has 32 registers (we explained, in detail, why this architecture has 32 registers in our online course). Application programmer, can access each of these 32 registers through its ABI name, for example, you need know the value of stack pointer or move the stack pointer, all you need to do is “addi sp, sp, -16”, where ‘sp’ is the ABI name of stack pointer.