ruby: single physical memory in fs mode

Both ruby and the system used to maintain memory copies.  With the changes
carried for programmed io accesses, only one single memory is required for
fs simulations.  This patch sets the copy of memory that used to reside
with the system to null, so that no space is allocated, but address checks
can still be carried out.  All the memory accesses now source and sink values
to the memory maintained by ruby.

1 files changed, 7 insertions, 7 deletions

diff --git a/tests/configs/pc-simple-timing-ruby.py b/tests/configs/pc-simple-timing-ruby.py
index 2ac571c83..633a19e2f 100644
--- a/tests/configs/pc-simple-timing-ruby.py
+++ b/tests/configs/pc-simple-timing-ruby.py
@@ -68,12 +68,16 @@ system.cpu_clk_domain = SrcClockDomain(clock = '2GHz',
 system.cpu = [TimingSimpleCPU(cpu_id=i, clk_domain = system.cpu_clk_domain)
               for i in xrange(options.num_cpus)]
 
-Ruby.create_system(options, system, system.iobus, system._dma_ports)
+Ruby.create_system(options, True, system, system.iobus, system._dma_ports)
 
 # Create a seperate clock domain for Ruby
 system.ruby.clk_domain = SrcClockDomain(clock = options.ruby_clock,
                                         voltage_domain = system.voltage_domain)
 
+# Connect the ruby io port to the PIO bus,
+# assuming that there is just one such port.
+system.iobus.master = system.ruby._io_port.slave
+
 for (i, cpu) in enumerate(system.cpu):
     # create the interrupt controller
     cpu.createInterruptController()
@@ -82,17 +86,13 @@ for (i, cpu) in enumerate(system.cpu):
     cpu.dcache_port = system.ruby._cpu_ports[i].slave
     cpu.itb.walker.port = system.ruby._cpu_ports[i].slave
     cpu.dtb.walker.port = system.ruby._cpu_ports[i].slave
+
     cpu.interrupts.pio = system.ruby._cpu_ports[i].master
     cpu.interrupts.int_master = system.ruby._cpu_ports[i].slave
     cpu.interrupts.int_slave = system.ruby._cpu_ports[i].master
 
-    # Set access_phys_mem to True for ruby port
-    system.ruby._cpu_ports[i].access_phys_mem = True
-
-system.physmem = [DDR3_1600_x64(range = r)
+system.physmem = [SimpleMemory(range = r, null = True)
                   for r in system.mem_ranges]
-for i in xrange(len(system.physmem)):
-    system.physmem[i].port = system.iobus.master
 
 root = Root(full_system = True, system = system)
 m5.ticks.setGlobalFrequency('1THz')