Why does Cortex-R only support most two cores?

Why does Cortex-R only support most two cores?
which processors are very advanced processors

i just want to know which processors are very advanced processors in cortex-A,R and M series.
interrupt distribution on A53 processor

Hi, Linux Kernel 4.9 Processor a53 SMP 64 Bit linux image Issue seen:- Ethernet interrupts are seen arriving only on core0 ONLY, though core0 is completely occupied by other interrupts. moving...
Which ARM processor is HSA compatible?

Hi, I am new to the ARM community. I am currently studying the HSA ( Heterogeneous System Architecture). ARM is member of this foundation. I wonder which processor from ARM is HSA enabled? And on which...
Cortex-A53 processor instruction cycles

hi , I want to know the cycle information ,latencies of each instruction(secially vector instructions in A32 and A64) in coretex A53 architecture. It seems there is no document available which specifies...