From: Gabriel Somlo Date: Wed, 29 Jul 2020 10:59:59 +0000 (-0400) Subject: cores/cpu/rocket: expose slave port for DMA X-Git-Tag: 24jan2021_ls180~36^2~2 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2d9dc8f9396b9feefed1bf23dc8ecda5c4d0f5e1;p=litex.git cores/cpu/rocket: expose slave port for DMA Signed-off-by: Gabriel Somlo --- diff --git a/litex/soc/cores/cpu/rocket/core.py b/litex/soc/cores/cpu/rocket/core.py index b2ae9a83..eadf9646 100644 --- a/litex/soc/cores/cpu/rocket/core.py +++ b/litex/soc/cores/cpu/rocket/core.py @@ -93,7 +93,7 @@ class RocketRV64(CPU): flags += "-D__rocket__ " return flags - def __init__(self, platform, variant="standard", use_memory_bus=True): + def __init__(self, platform, variant="standard"): self.platform = platform self.variant = variant @@ -102,18 +102,16 @@ class RocketRV64(CPU): mem_dw, mmio_dw = AXI_DATA_WIDTHS[self.variant] - self.mem_axi = mem_axi = axi.AXIInterface(data_width= mem_dw, address_width=32, id_width=4) + self.mem_axi = mem_axi = axi.AXIInterface(data_width=mem_dw, address_width=32, id_width=4) self.mmio_axi = mmio_axi = axi.AXIInterface(data_width=mmio_dw, address_width=32, id_width=4) + self.l2fb_axi = l2fb_axi = axi.AXIInterface(data_width=mmio_dw, address_width=32, id_width=4) - self.mem_wb = mem_wb = wishbone.Interface(data_width=mem_dw, adr_width=32-log2_int(mem_dw//8)) self.mmio_wb = mmio_wb = wishbone.Interface(data_width=mmio_dw, adr_width=32-log2_int(mmio_dw//8)) + self.l2fb_wb = l2fb_wb = wishbone.Interface(data_width=mmio_dw, adr_width=32-log2_int(mmio_dw//8)) + self.memory_buses = [mem_axi] self.periph_buses = [mmio_wb] - self.memory_buses = [] - if use_memory_bus: - self.memory_buses.append(self.mem_axi) - else: - self.periph_buses.append(self.mem_wb) + self.dma_bus = l2fb_wb # # # @@ -123,6 +121,9 @@ class RocketRV64(CPU): i_reset=ResetSignal() | self.reset, # debug (ignored) + #i_resetctrl_hartIsInReset_0 = 0, + i_debug_clock = 0, + i_debug_reset = 0, #o_debug_clockeddmi_dmi_req_ready = , i_debug_clockeddmi_dmi_req_valid = 0, i_debug_clockeddmi_dmi_req_bits_addr = 0, @@ -136,7 +137,7 @@ class RocketRV64(CPU): i_debug_clockeddmi_dmiReset = 0, #o_debug_ndreset = , #o_debug_dmactive = , - + i_debug_dmactiveAck = 0, # irq i_interrupts=self.interrupt, @@ -226,6 +227,49 @@ class RocketRV64(CPU): i_mmio_axi4_0_r_bits_data = mmio_axi.r.data, i_mmio_axi4_0_r_bits_resp = mmio_axi.r.resp, i_mmio_axi4_0_r_bits_last = mmio_axi.r.last, + + # axi l2fb (slave, for e.g., DMA) + o_l2_frontend_bus_axi4_0_aw_ready = l2fb_axi.aw.ready, + i_l2_frontend_bus_axi4_0_aw_valid = l2fb_axi.aw.valid, + i_l2_frontend_bus_axi4_0_aw_bits_id = l2fb_axi.aw.id, + i_l2_frontend_bus_axi4_0_aw_bits_addr = l2fb_axi.aw.addr, + i_l2_frontend_bus_axi4_0_aw_bits_len = l2fb_axi.aw.len, + i_l2_frontend_bus_axi4_0_aw_bits_size = l2fb_axi.aw.size, + i_l2_frontend_bus_axi4_0_aw_bits_burst = l2fb_axi.aw.burst, + i_l2_frontend_bus_axi4_0_aw_bits_lock = l2fb_axi.aw.lock, + i_l2_frontend_bus_axi4_0_aw_bits_cache = l2fb_axi.aw.cache, + i_l2_frontend_bus_axi4_0_aw_bits_prot = l2fb_axi.aw.prot, + i_l2_frontend_bus_axi4_0_aw_bits_qos = l2fb_axi.aw.qos, + + o_l2_frontend_bus_axi4_0_w_ready = l2fb_axi.w.ready, + i_l2_frontend_bus_axi4_0_w_valid = l2fb_axi.w.valid, + i_l2_frontend_bus_axi4_0_w_bits_data = l2fb_axi.w.data, + i_l2_frontend_bus_axi4_0_w_bits_strb = l2fb_axi.w.strb, + i_l2_frontend_bus_axi4_0_w_bits_last = l2fb_axi.w.last, + + i_l2_frontend_bus_axi4_0_b_ready = l2fb_axi.b.ready, + o_l2_frontend_bus_axi4_0_b_valid = l2fb_axi.b.valid, + o_l2_frontend_bus_axi4_0_b_bits_id = l2fb_axi.b.id, + o_l2_frontend_bus_axi4_0_b_bits_resp = l2fb_axi.b.resp, + + o_l2_frontend_bus_axi4_0_ar_ready = l2fb_axi.ar.ready, + i_l2_frontend_bus_axi4_0_ar_valid = l2fb_axi.ar.valid, + i_l2_frontend_bus_axi4_0_ar_bits_id = l2fb_axi.ar.id, + i_l2_frontend_bus_axi4_0_ar_bits_addr = l2fb_axi.ar.addr, + i_l2_frontend_bus_axi4_0_ar_bits_len = l2fb_axi.ar.len, + i_l2_frontend_bus_axi4_0_ar_bits_size = l2fb_axi.ar.size, + i_l2_frontend_bus_axi4_0_ar_bits_burst = l2fb_axi.ar.burst, + i_l2_frontend_bus_axi4_0_ar_bits_lock = l2fb_axi.ar.lock, + i_l2_frontend_bus_axi4_0_ar_bits_cache = l2fb_axi.ar.cache, + i_l2_frontend_bus_axi4_0_ar_bits_prot = l2fb_axi.ar.prot, + i_l2_frontend_bus_axi4_0_ar_bits_qos = l2fb_axi.ar.qos, + + i_l2_frontend_bus_axi4_0_r_ready = l2fb_axi.r.ready, + o_l2_frontend_bus_axi4_0_r_valid = l2fb_axi.r.valid, + o_l2_frontend_bus_axi4_0_r_bits_id = l2fb_axi.r.id, + o_l2_frontend_bus_axi4_0_r_bits_data = l2fb_axi.r.data, + o_l2_frontend_bus_axi4_0_r_bits_resp = l2fb_axi.r.resp, + o_l2_frontend_bus_axi4_0_r_bits_last = l2fb_axi.r.last, ) # adapt axi interfaces to wishbone @@ -234,10 +278,9 @@ class RocketRV64(CPU): self.comb += mmio_a2w.reset.eq(ResetSignal() | self.reset) self.submodules += mmio_a2w - if not use_memory_bus: - mem_a2w = ResetInserter()(axi.AXI2Wishbone(mem_axi, mem_wb, base_address=0)) - self.comb += mem_a2w.reset.eq(ResetSignal() | self.reset) - self.submodules += mem_a2w + l2fb_a2w = ResetInserter()(axi.Wishbone2AXI(l2fb_wb, l2fb_axi, base_address=0)) + self.comb += l2fb_a2w.reset.eq(ResetSignal() | self.reset) + self.submodules += l2fb_a2w # add verilog sources self.add_sources(platform, variant)