297 lines
10 KiB
Plaintext
297 lines
10 KiB
Plaintext
// Copyright (c) 2013-2019 Bluespec, Inc. All Rights Reserved
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package SoC_Map;
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// ================================================================
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// This module defines the overall 'address map' of the SoC, showing
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// the addresses serviced by each slave IP, and which addresses are
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// memory vs. I/O.
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// ***** WARNING! WARNING! WARNING! *****
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// During system integration, this address map should be identical to
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// the system interconnect settings (e.g., routing of requests between
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// masters and slaves). This map is also needed by software so that
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// it knows how to address various IPs.
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// This module contains no state; it just has constants, and so can be
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// freely instantiated at multiple places in the SoC module hierarchy
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// at no hardware cost. It allows this map to be defined in one
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// place and shared across the SoC.
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// ================================================================
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// Exports
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export SoC_Map_Struct (..), soc_map_struct;
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export SoC_Map_IFC (..), mkSoC_Map;
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export Num_Masters;
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export imem_master_num;
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export dmem_master_num;
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export Num_Slaves;
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export boot_rom_slave_num;
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export mem0_controller_slave_num;
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export uart0_slave_num;
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export N_External_Interrupt_Sources;
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export n_external_interrupt_sources;
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export irq_num_uart0;
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// ================================================================
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// Bluespec library imports
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// None
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// ================================================================
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// Project imports
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import Fabric_Defs :: *; // Only for type Fabric_Addr
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// ================================================================
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// Top-level-struct version of the SoC Map for RISCY-OOO
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typedef struct {
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Bit #(64) near_mem_io_addr_base;
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Bit #(64) main_mem_addr_base;
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Bit #(64) main_mem_addr_size;
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Bit #(64) pc_reset_value;
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} SoC_Map_Struct
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deriving (FShow);
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SoC_Map_Struct soc_map_struct =
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SoC_Map_Struct {
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near_mem_io_addr_base: 'h_0200_0000,
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main_mem_addr_base: 'h_8000_0000,
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main_mem_addr_size: 'h_1000_0000,
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pc_reset_value: 'h_0000_1000
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};
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// ================================================================
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// Interface and module for the address map
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interface SoC_Map_IFC;
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(* always_ready *) method Fabric_Addr m_near_mem_io_addr_base;
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(* always_ready *) method Fabric_Addr m_near_mem_io_addr_size;
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(* always_ready *) method Fabric_Addr m_near_mem_io_addr_lim;
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(* always_ready *) method Fabric_Addr m_plic_addr_base;
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(* always_ready *) method Fabric_Addr m_plic_addr_size;
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(* always_ready *) method Fabric_Addr m_plic_addr_lim;
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(* always_ready *) method Fabric_Addr m_uart0_addr_base;
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(* always_ready *) method Fabric_Addr m_uart0_addr_size;
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(* always_ready *) method Fabric_Addr m_uart0_addr_lim;
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(* always_ready *) method Fabric_Addr m_boot_rom_addr_base;
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(* always_ready *) method Fabric_Addr m_boot_rom_addr_size;
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(* always_ready *) method Fabric_Addr m_boot_rom_addr_lim;
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(* always_ready *) method Fabric_Addr m_mem0_controller_addr_base;
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(* always_ready *) method Fabric_Addr m_mem0_controller_addr_size;
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(* always_ready *) method Fabric_Addr m_mem0_controller_addr_lim;
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(* always_ready *) method Fabric_Addr m_tcm_addr_base;
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(* always_ready *) method Fabric_Addr m_tcm_addr_size;
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(* always_ready *) method Fabric_Addr m_tcm_addr_lim;
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(* always_ready *)
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method Bool m_is_mem_addr (Fabric_Addr addr);
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(* always_ready *)
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method Bool m_is_IO_addr (Fabric_Addr addr);
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(* always_ready *)
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method Bool m_is_near_mem_IO_addr (Fabric_Addr addr);
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(* always_ready *) method Bit #(64) m_pc_reset_value;
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(* always_ready *) method Bit #(64) m_mtvec_reset_value;
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(* always_ready *) method Bit #(64) m_nmivec_reset_value;
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endinterface
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// ================================================================
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(* synthesize *)
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module mkSoC_Map (SoC_Map_IFC);
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// ----------------------------------------------------------------
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// Near_Mem_IO (including CLINT, the core-local interruptor)
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Fabric_Addr near_mem_io_addr_base = 'h_0200_0000;
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Fabric_Addr near_mem_io_addr_size = 'h_0000_C000; // 48K
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Fabric_Addr near_mem_io_addr_lim = near_mem_io_addr_base + near_mem_io_addr_size;
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function Bool fn_is_near_mem_io_addr (Fabric_Addr addr);
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return ((near_mem_io_addr_base <= addr) && (addr < near_mem_io_addr_lim));
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endfunction
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// ----------------------------------------------------------------
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// PLIC
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Fabric_Addr plic_addr_base = 'h_0C00_0000;
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Fabric_Addr plic_addr_size = 'h_0040_0000; // 4M
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Fabric_Addr plic_addr_lim = plic_addr_base + plic_addr_size;
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function Bool fn_is_plic_addr (Fabric_Addr addr);
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return ((plic_addr_base <= addr) && (addr < plic_addr_lim));
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endfunction
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// ----------------------------------------------------------------
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// UART 0
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Fabric_Addr uart0_addr_base = 'hC000_0000;
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Fabric_Addr uart0_addr_size = 'h0000_0080; // 128
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Fabric_Addr uart0_addr_lim = uart0_addr_base + uart0_addr_size;
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function Bool fn_is_uart0_addr (Fabric_Addr addr);
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return ((uart0_addr_base <= addr) && (addr < uart0_addr_lim));
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endfunction
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// ----------------------------------------------------------------
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// Boot ROM
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Fabric_Addr boot_rom_addr_base = 'h_0000_1000;
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Fabric_Addr boot_rom_addr_size = 'h_0000_1000; // 4K
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Fabric_Addr boot_rom_addr_lim = boot_rom_addr_base + boot_rom_addr_size;
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function Bool fn_is_boot_rom_addr (Fabric_Addr addr);
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return ((boot_rom_addr_base <= addr) && (addr < boot_rom_addr_lim));
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endfunction
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// ----------------------------------------------------------------
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// Main Mem Controller 0
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Fabric_Addr mem0_controller_addr_base = 'h_8000_0000;
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Fabric_Addr mem0_controller_addr_size = 'h_1000_0000; // 256 MB
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Fabric_Addr mem0_controller_addr_lim = mem0_controller_addr_base + mem0_controller_addr_size;
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function Bool fn_is_mem0_controller_addr (Fabric_Addr addr);
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return ((mem0_controller_addr_base <= addr) && (addr < mem0_controller_addr_lim));
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endfunction
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// ----------------------------------------------------------------
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// Tightly-coupled memory ('TCM'; optional)
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`ifdef Near_Mem_TCM
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// Integer kB_per_TCM = 'h4; // 4KB
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// Integer kB_per_TCM = 'h40; // 64KB
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// Integer kB_per_TCM = 'h80; // 128KB
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// Integer kB_per_TCM = 'h400; // 1 MB
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Integer kB_per_TCM = 'h4000; // 16 MB
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`else
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Integer kB_per_TCM = 0;
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`endif
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Integer bytes_per_TCM = kB_per_TCM * 'h400;
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Fabric_Addr tcm_addr_base = 'h_0000_0000;
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Fabric_Addr tcm_addr_size = fromInteger (bytes_per_TCM);
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Fabric_Addr tcm_addr_lim = tcm_addr_base + tcm_addr_size;
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function Bool fn_is_tcm_addr (Fabric_Addr addr);
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return ((tcm_addr_base <= addr) && (addr < tcm_addr_lim));
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endfunction
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// ----------------------------------------------------------------
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// Memory address predicate
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// Identifies memory addresses in the Fabric.
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// (Caches need this information to cache these addresses.)
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function Bool fn_is_mem_addr (Fabric_Addr addr);
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return ( fn_is_mem0_controller_addr (addr)
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|| fn_is_tcm_addr (addr)
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);
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endfunction
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// ----------------------------------------------------------------
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// I/O address predicate
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// Identifies I/O addresses in the Fabric.
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// (Caches need this information to avoid cacheing these addresses.)
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function Bool fn_is_IO_addr (Fabric_Addr addr);
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return ( fn_is_boot_rom_addr (addr)
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|| fn_is_near_mem_io_addr (addr)
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|| fn_is_plic_addr (addr)
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|| fn_is_uart0_addr (addr)
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);
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endfunction
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// ----------------------------------------------------------------
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// PC, MTVEC and NMIVEC reset values
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Bit #(64) pc_reset_value = boot_rom_addr_base;
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Bit #(64) mtvec_reset_value = 'h1000; // TODO
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Bit #(64) nmivec_reset_value = ?; // TODO
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// ================================================================
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// INTERFACE
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method Fabric_Addr m_near_mem_io_addr_base = near_mem_io_addr_base;
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method Fabric_Addr m_near_mem_io_addr_size = near_mem_io_addr_size;
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method Fabric_Addr m_near_mem_io_addr_lim = near_mem_io_addr_lim;
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method Fabric_Addr m_plic_addr_base = plic_addr_base;
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method Fabric_Addr m_plic_addr_size = plic_addr_size;
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method Fabric_Addr m_plic_addr_lim = plic_addr_lim;
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method Fabric_Addr m_uart0_addr_base = uart0_addr_base;
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method Fabric_Addr m_uart0_addr_size = uart0_addr_size;
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method Fabric_Addr m_uart0_addr_lim = uart0_addr_lim;
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method Fabric_Addr m_boot_rom_addr_base = boot_rom_addr_base;
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method Fabric_Addr m_boot_rom_addr_size = boot_rom_addr_size;
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method Fabric_Addr m_boot_rom_addr_lim = boot_rom_addr_lim;
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method Fabric_Addr m_mem0_controller_addr_base = mem0_controller_addr_base;
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method Fabric_Addr m_mem0_controller_addr_size = mem0_controller_addr_size;
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method Fabric_Addr m_mem0_controller_addr_lim = mem0_controller_addr_lim;
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method Fabric_Addr m_tcm_addr_base = tcm_addr_base;
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method Fabric_Addr m_tcm_addr_size = tcm_addr_size;
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method Fabric_Addr m_tcm_addr_lim = tcm_addr_lim;
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method Bool m_is_mem_addr (Fabric_Addr addr) = fn_is_mem_addr (addr);
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method Bool m_is_IO_addr (Fabric_Addr addr) = fn_is_IO_addr (addr);
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method Bool m_is_near_mem_IO_addr (Fabric_Addr addr) = fn_is_near_mem_io_addr (addr);
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method Bit #(64) m_pc_reset_value = pc_reset_value;
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method Bit #(64) m_mtvec_reset_value = mtvec_reset_value;
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method Bit #(64) m_nmivec_reset_value = nmivec_reset_value;
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endmodule
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// ================================================================
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// Count and master-numbers of masters in the fabric.
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typedef 2 Num_Masters;
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Integer imem_master_num = 0;
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Integer dmem_master_num = 1;
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// ================================================================
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// Count and slave-numbers of slaves in the fabric.
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typedef 3 Num_Slaves;
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Integer boot_rom_slave_num = 0;
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Integer mem0_controller_slave_num = 1;
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Integer uart0_slave_num = 2;
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// ================================================================
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// Interrupt request numbers (== index in to vector of
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// interrupt-request lines in Core)
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typedef 16 N_External_Interrupt_Sources;
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Integer n_external_interrupt_sources = valueOf (N_External_Interrupt_Sources);
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Integer irq_num_uart0 = 0;
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// ================================================================
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endpackage
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