Changes between Version 18 and Version 19 of TBR/BSP/Leon3

Timestamp:

01/13/15 10:53:18 (9 years ago)

Author:

daniel.cederman

Comment:

--

TBR/BSP/Leon3

@@ -57 +57 @@
 The console driver can operate in polling mode or interrupt mode, which mode is used is selected at compile time using the `CONSOLE_USE_INTERRUPT` configuration option. All UARTs are operate in the same mode.
 
+= SMP Support =
+
+The BSP supports RTEMS SMP.
+
+== Static Interrupt Affinity ==
+
+CPU affinity can be assigned to individual interrupts. By default interrupts are processed by the boot CPU,
+but this can be changed by defining the weakly linked table `const unsigned char LEON3_irq_to_cpu[32]` in the user program.
+This makes it possible to specify which CPU a specific interrupt should be routed to. The array index is the interrupt to be
+rerouted and the `array[INTERRUPT]` content is the CPU number relative to the boot CPU index that will be servicing the
+interrupts from the IRQ source.
+
+== Selecting IRQ for Inter-processor Interrupts ==
+Inter-processor interrupts are used in the communication between CPUs. By default IRQ 14 is used, but on
+some systems this can conflict with an IP core using the same IRQ. Defining the weakly linked variable
+`const unsigned char LEON3_mp_irq` in the user program makes it possible to decide which IRQ should be
+used instead, allowing the conflict to be avoided.
+
 = Console forwarding to GRMON =