hardware_gen.py: Address some warning messages

CMake treats any text output that is generated by tools during the
configuration phase as important if it isn't part of a message(STATUS)
command. Output generated by hardware_gen.py often shows up as warnings
about device tree properties that are usually uninformative. Resolving
some of the warning conditions removes these messages for most
platforms.

- Setting kernel_size in hardware.yml to 0x1000 to handle cases where
  the kernel only needs the first page of a device that has a
  device-tree definition larger than that.
- Remove status print about each Interrupt processed as it's usually not
  useful information.
- Only process IRQs for a selected kernel device if the rule for that
  device has any interrupt queries. This prevents warnings for IRQ
  controllers that the script doesn't know how to process when it
  doesn't need to.

Signed-off-by: Kent McLeod <kent@kry10.com>

tools/hardware.yml

@@ -21,13 +21,16 @@ devices:
       # distributor
       - index: 0
         kernel: GIC_V2_DISTRIBUTOR_PPTR
+        kernel_size: 0x1000
       # controller
       - index: 1
         kernel: GIC_V2_CONTROLLER_PPTR
+        kernel_size: 0x1000
       # GICV
       - index: 2
         kernel: GIC_V2_VCPUCTRL_PPTR
         macro: CONFIG_ARM_HYPERVISOR_SUPPORT
+        kernel_size: 0x1000
     interrupts:
       INTERRUPT_VGIC_MAINTENANCE: 0
   # ARM GICv3
@@ -75,6 +78,7 @@ devices:
     regions:
       - index: 0
         kernel: AVIC_PPTR
+        kernel_size: 0x1000
   # ARM PL310 L2 cache controller (arm/l2c2x0.txt)
   - compatible:
       - arm,pl310-cache
@@ -178,6 +182,7 @@ devices:
     regions:
       - index: 0
         kernel: EPIT_PPTR
+        kernel_size: 0x1000
     interrupts:
       KERNEL_TIMER_IRQ: 0
   # i.MX GPT
@@ -212,6 +217,7 @@ devices:
       - index: 0
         kernel: CMPER_PPTR
         user: true
+        kernel_size: 0x1000
   # TI watchdog
   - compatible:
       - ti,omap3-wdt
@@ -241,6 +247,7 @@ devices:
         kernel: UART_PPTR
         macro: CONFIG_PRINTING
         user: true
+        kernel_size: 0x1000
 
   # RISC-V PLIC
   - compatible:

tools/hardware/outputs/c_header.py

@@ -141,8 +141,8 @@ def get_interrupts(tree: fdt.FdtParser, rules: rule.HardwareYaml):
     irqs = []
     for dev in kernel_devices:
         dev_rule = rules.get_rule(dev)
-        print(f"interrupts for device {dev.path}")
-        irqs += dev_rule.get_interrupts(tree, dev)
+        if len(dev_rule.interrupts.items()) > 0:
+            irqs += dev_rule.get_interrupts(tree, dev)
 
     ret = {}
     for irq in irqs: