Include Wishbone to ASMI bridge

m-labs · Feb 13, 2012 · 5165ff7 · 5165ff7
1 parent 0654bf4
commit 5165ff7
Showing 1 changed file with 31 additions and 9 deletions.
diff --git a/top.py b/top.py
@@ -1,48 +1,70 @@
 from migen.fhdl.structure import *
-from migen.fhdl import tools, verilog, autofragment
-from migen.bus import wishbone, csr, wishbone2csr
+from migen.fhdl import verilog, autofragment
+from migen.bus import wishbone, asmibus, wishbone2asmi, csr, wishbone2csr
 
 from milkymist import m1reset, clkfx, lm32, norflash, uart, sram
 import constraints
 
+MHz = 1000000
+clk_freq = 80*MHz
+sram_size = 4096 # in bytes
+l2_size = 8192 # in bytes
+
 def get():
-	MHz = 1000000
-	clk_freq = 80*MHz
-	sram_size = 4096 # in bytes
-
-	clkfx_sys = clkfx.ClkFX(50*MHz, clk_freq)
-	reset0 = m1reset.M1Reset()
+	#
+	# ASMI
+	#
+	asmihub0 = asmibus.Hub(24, 64, 8) # TODO: get hub from memory controller
+	asmiport_wb = asmihub0.get_port()
+	asmihub0.finalize()
 
+	#
+	# WISHBONE
+	#
 	cpu0 = lm32.LM32()
 	norflash0 = norflash.NorFlash(25, 12)
 	sram0 = sram.SRAM(sram_size//4)
+	wishbone2asmi0 = wishbone2asmi.WB2ASMI(l2_size//4, asmiport_wb)
 	wishbone2csr0 = wishbone2csr.WB2CSR()
 
 	# norflash     0x00000000 (shadow @0x80000000)
 	# SRAM/debug   0x10000000 (shadow @0x90000000)
 	# USB          0x20000000 (shadow @0xa0000000)
 	# Ethernet     0x30000000 (shadow @0xb0000000)
 	# SDRAM        0x40000000 (shadow @0xc0000000)
-	# CSR bridge   0x60000000 (shadow @0xe0000000)	
+	# CSR bridge   0x60000000 (shadow @0xe0000000)
 	wishbonecon0 = wishbone.InterconnectShared(
 		[
 			cpu0.ibus,
 			cpu0.dbus
 		], [
 			(binc("000"), norflash0.bus),
 			(binc("001"), sram0.bus),
+			(binc("10"), wishbone2asmi0.wishbone),
 			(binc("11"), wishbone2csr0.wishbone)
 		],
 		register=True,
 		offset=1)
 
+	#
+	# CSR
+	#
 	uart0 = uart.UART(0, clk_freq, baud=115200)
 	csrcon0 = csr.Interconnect(wishbone2csr0.csr, [uart0.bank.interface])
 
+	#
+	# Interrupts
+	#
 	interrupts = Fragment([
 		cpu0.interrupt[0].eq(uart0.events.irq)
 	])
 
+	#
+	# Housekeeping
+	#
+	clkfx_sys = clkfx.ClkFX(50*MHz, clk_freq)
+	reset0 = m1reset.M1Reset()
+
 	frag = autofragment.from_local() + interrupts
 	src_verilog, vns = verilog.convert(frag,
 		{clkfx_sys.clkin, reset0.trigger_reset},