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cpu/picorv32: Extract picorv32 parameters from Instance constructor to facilitate creating variant CPUs.

This commit is contained in:
William D. Jones 2018-10-29 00:59:13 -04:00
parent e9d4c882ba
commit d05fe673a0
1 changed files with 31 additions and 23 deletions
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54
litex/soc/cores/cpu/picorv32/core.py
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@ -29,31 +29,39 @@ class PicoRV32(Module):
mem_wstrb = Signal(4) mem_wstrb = Signal(4)
mem_rdata = Signal(32) mem_rdata = Signal(32)
# PicoRV32 parameters. To create a new variant, modify this dictionary
# and change the desired parameters.
picorv32_params = {
"p_ENABLE_COUNTERS" : 1,
"p_ENABLE_COUNTERS64" : 1,
# Changing REGS has no effect as on FPGAs, the registers are
# implemented using a register file stored in DPRAM.
"p_ENABLE_REGS_16_31" : 1,
"p_ENABLE_REGS_DUALPORT" : 1,
"p_LATCHED_MEM_RDATA" : 0,
"p_TWO_STAGE_SHIFT" : 1,
"p_TWO_CYCLE_COMPARE" : 0,
"p_TWO_CYCLE_ALU" : 0,
"p_CATCH_MISALIGN" : 1,
"p_CATCH_ILLINSN" : 1,
"p_ENABLE_PCPI" : 0,
"p_ENABLE_MUL" : 1,
"p_ENABLE_DIV" : 1,
"p_ENABLE_FAST_MUL" : 0,
"p_ENABLE_IRQ" : 1,
"p_ENABLE_IRQ_QREGS" : 1,
"p_ENABLE_IRQ_TIMER" : 1,
"p_ENABLE_TRACE" : 0,
"p_MASKED_IRQ" : 0x00000000,
"p_LATCHED_IRQ" : 0xffffffff,
"p_PROGADDR_RESET" : progaddr_reset,
"p_PROGADDR_IRQ" : 0x00000010,
"p_STACKADDR" : 0xffffffff
}
self.specials += Instance("picorv32", self.specials += Instance("picorv32",
# parameters # parameters
p_ENABLE_COUNTERS=1, **picorv32_params,
p_ENABLE_COUNTERS64=1,
p_ENABLE_REGS_16_31=1,
p_ENABLE_REGS_DUALPORT=1,
p_LATCHED_MEM_RDATA=0,
p_TWO_STAGE_SHIFT=1,
p_TWO_CYCLE_COMPARE=0,
p_TWO_CYCLE_ALU=0,
p_CATCH_MISALIGN=1,
p_CATCH_ILLINSN=1,
p_ENABLE_PCPI=0,
p_ENABLE_MUL=1,
p_ENABLE_DIV=1,
p_ENABLE_FAST_MUL=0,
p_ENABLE_IRQ=1,
p_ENABLE_IRQ_QREGS=1,
p_ENABLE_IRQ_TIMER=1,
p_ENABLE_TRACE=0,
p_MASKED_IRQ=0x00000000,
p_LATCHED_IRQ=0xffffffff,
p_PROGADDR_RESET=progaddr_reset,
p_PROGADDR_IRQ=0x00000010,
p_STACKADDR=0xffffffff,
# clock / reset # clock / reset
i_clk=ClockSignal(), i_clk=ClockSignal(),