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cpu/VexRiscv_SMP add --wishbone-force-32b option

This commit is contained in:
Dolu1990 2022-09-06 11:23:36 +02:00
parent 89522f6980
commit 5fad94f9d6
1 changed files with 6 additions and 1 deletions
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7
litex/soc/cores/cpu/vexriscv_smp/core.py
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@ -48,6 +48,7 @@ class VexRiscvSMP(CPU):
aes_instruction = False
out_of_order_decoder = True
wishbone_memory = False
wishbone_force_32b = False
with_fpu = False
cpu_per_fpu = 4
with_rvc = False
@ -70,6 +71,7 @@ class VexRiscvSMP(CPU):
cpu_group.add_argument("--aes-instruction", default=None, help="Enable AES instruction acceleration.")
cpu_group.add_argument("--without-out-of-order-decoder", action="store_true", help="Reduce area at cost of peripheral access speed")
cpu_group.add_argument("--with-wishbone-memory", action="store_true", help="Disable native LiteDRAM interface")
cpu_group.add_argument("--wishbone-force-32b", action="store_true", help="Force the wishbone bus to be 32 bits")
cpu_group.add_argument("--with-fpu", action="store_true", help="Enable the F32/F64 FPU")
cpu_group.add_argument("--cpu-per-fpu", default="4", help="Maximal ratio between CPU count and FPU count. Will instanciate as many FPU as necessary.")
cpu_group.add_argument("--with-rvc", action="store_true", help="Enable RISC-V compressed instruction support")
@ -98,6 +100,7 @@ class VexRiscvSMP(CPU):
if(args.aes_instruction): VexRiscvSMP.aes_instruction = bool(args.aes_instruction)
if(args.without_out_of_order_decoder): VexRiscvSMP.out_of_order_decoder = False
if(args.with_wishbone_memory): VexRiscvSMP.wishbone_memory = True
if(args.wishbone_force_32b): VexRiscvSMP.wishbone_force_32b = True
if(args.with_fpu):
VexRiscvSMP.with_fpu = True
VexRiscvSMP.icache_width = 64
@ -169,6 +172,7 @@ class VexRiscvSMP(CPU):
f"{'_Aes' if VexRiscvSMP.aes_instruction else ''}" \
f"{'_Ood' if VexRiscvSMP.out_of_order_decoder else ''}" \
f"{'_Wm' if VexRiscvSMP.wishbone_memory else ''}" \
f"{'_Wf32' if VexRiscvSMP.wishbone_force_32b else ''}" \
f"{'_Fpu' + str(VexRiscvSMP.cpu_per_fpu) if VexRiscvSMP.with_fpu else ''}" \
f"{'_Rvc' if VexRiscvSMP.with_rvc else ''}"
@ -256,6 +260,7 @@ class VexRiscvSMP(CPU):
gen_args.append(f"--aes-instruction={VexRiscvSMP.aes_instruction}")
gen_args.append(f"--out-of-order-decoder={VexRiscvSMP.out_of_order_decoder}")
gen_args.append(f"--wishbone-memory={VexRiscvSMP.wishbone_memory}")
gen_args.append(f"--wishbone-force-32b={VexRiscvSMP.wishbone_force_32b}")
gen_args.append(f"--fpu={VexRiscvSMP.with_fpu}")
gen_args.append(f"--cpu-per-fpu={VexRiscvSMP.cpu_per_fpu}")
gen_args.append(f"--rvc={VexRiscvSMP.with_rvc}")
@ -287,7 +292,7 @@ class VexRiscvSMP(CPU):
False : 32,
# Else max of I/DCache-width.
True : max(VexRiscvSMP.icache_width, VexRiscvSMP.dcache_width),
}[VexRiscvSMP.wishbone_memory])
}[VexRiscvSMP.wishbone_memory and not VexRiscvSMP.wishbone_force_32b])
self.periph_buses = [pbus] # Peripheral buses (Connected to main SoC's bus).
self.memory_buses = [] # Memory buses (Connected directly to LiteDRAM).