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authorAlec Roelke <ar4jc@virginia.edu>2016-11-30 17:10:28 -0500
committerAlec Roelke <ar4jc@virginia.edu>2016-11-30 17:10:28 -0500
commite76bfc87640dd236f1527e3f8f19507f0275dad9 (patch)
treeec4c7d3add594e373cbaf5c0509889720113d6fc /src/cpu
parentce2722cdd97a31f85d36f6c32637b230e3c25c73 (diff)
downloadgem5-e76bfc87640dd236f1527e3f8f19507f0275dad9.tar.xz
arch: [Patch 1/5] Added RISC-V base instruction set RV64I
First of five patches adding RISC-V to GEM5. This patch introduces the base 64-bit ISA (RV64I) in src/arch/riscv for use with syscall emulation. The multiply, floating point, and atomic memory instructions will be added in additional patches, as well as support for more detailed CPU models. The loader is also modified to be able to parse RISC-V ELF files, and a "Hello world\!" example for RISC-V is added to test-progs. Patch 2 will implement the multiply extension, RV64M; patch 3 will implement the floating point (single- and double-precision) extensions, RV64FD; patch 4 will implement the atomic memory instructions, RV64A, and patch 5 will add support for timing, minor, and detailed CPU models that is missing from the first four patches (such as handling locked memory). [Removed several unused parameters and imports from RiscvInterrupts.py, RiscvISA.py, and RiscvSystem.py.] [Fixed copyright information in RISC-V files copied from elsewhere that had ARM licenses attached.] [Reorganized instruction definitions in decoder.isa so that they are sorted by opcode in preparation for the addition of ISA extensions M, A, F, D.] [Fixed formatting of several files, removed some variables and instructions that were missed when moving them to other patches, fixed RISC-V Foundation copyright attribution, and fixed history of files copied from other architectures using hg copy.] [Fixed indentation of switch cases in isa.cc.] [Reorganized syscall descriptions in linux/process.cc to remove large number of repeated unimplemented system calls and added implmementations to functions that have received them since it process.cc was first created.] [Fixed spacing for some copyright attributions.] [Replaced the rest of the file copies using hg copy.] [Fixed style check errors and corrected unaligned memory accesses.] [Fix some minor formatting mistakes.] Signed-off by: Alec Roelke Signed-off by: Jason Lowe-Power <jason@lowepower.com>
Diffstat (limited to 'src/cpu')
-rw-r--r--src/cpu/BaseCPU.py14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/cpu/BaseCPU.py b/src/cpu/BaseCPU.py
index 4d114cbdc..c85e5afda 100644
--- a/src/cpu/BaseCPU.py
+++ b/src/cpu/BaseCPU.py
@@ -85,6 +85,11 @@ elif buildEnv['TARGET_ISA'] == 'power':
from PowerInterrupts import PowerInterrupts
from PowerISA import PowerISA
isa_class = PowerISA
+elif buildEnv['TARGET_ISA'] == 'riscv':
+ from RiscvTLB import RiscvTLB
+ from RiscvInterrupts import RiscvInterrupts
+ from RiscvISA import RiscvISA
+ isa_class = RiscvISA
class BaseCPU(MemObject):
type = 'BaseCPU'
@@ -185,6 +190,12 @@ class BaseCPU(MemObject):
interrupts = VectorParam.PowerInterrupts(
[], "Interrupt Controller")
isa = VectorParam.PowerISA([ isa_class() ], "ISA instance")
+ elif buildEnv['TARGET_ISA'] == 'riscv':
+ dtb = Param.RiscvTLB(RiscvTLB(), "Data TLB")
+ itb = Param.RiscvTLB(RiscvTLB(), "Instruction TLB")
+ interrupts = VectorParam.RiscvInterrupts(
+ [], "Interrupt Controller")
+ isa = VectorParam.RiscvISA([ isa_class() ], "ISA instance")
else:
print "Don't know what TLB to use for ISA %s" % \
buildEnv['TARGET_ISA']
@@ -242,6 +253,9 @@ class BaseCPU(MemObject):
self.interrupts = [ArmInterrupts() for i in xrange(self.numThreads)]
elif buildEnv['TARGET_ISA'] == 'power':
self.interrupts = [PowerInterrupts() for i in xrange(self.numThreads)]
+ elif buildEnv['TARGET_ISA'] == 'riscv':
+ self.interrupts = \
+ [RiscvInterrupts() for i in xrange(self.numThreads)]
else:
print "Don't know what Interrupt Controller to use for ISA %s" % \
buildEnv['TARGET_ISA']