riscv/rocket-chip
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Use auto-generated CAUSE constants

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This commit is contained in:
Andrew Waterman
2014-01-21 15:01:54 -08:00
parent 95de358a96
commit 6ba2c1abe5
2 changed files with 44 additions and 14 deletions
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24
rocket/src/main/scala/ctrl.scala
View File

@@ -433,13 +433,13 @@ class Control(implicit conf: RocketConfiguration) extends Module
val (id_xcpt, id_cause) = checkExceptions(List(
(id_interrupt, id_interrupt_cause),
(io.imem.resp.bits.xcpt_ma, UInt(0)),
(io.imem.resp.bits.xcpt_if, UInt(1)),
(!id_int_val || id_csr_invalid, UInt(2)),
(id_privileged && !io.dpath.status.s, UInt(3)),
((id_fp_val || id_csr_fp) && !io.dpath.status.ef, UInt(4)),
(id_syscall, UInt(6)),
(id_rocc_val && !io.dpath.status.er, UInt(12))))
(io.imem.resp.bits.xcpt_ma, UInt(Causes.misaligned_fetch)),
(io.imem.resp.bits.xcpt_if, UInt(Causes.fault_fetch)),
(!id_int_val || id_csr_invalid, UInt(Causes.illegal_instruction)),
(id_privileged && !io.dpath.status.s, UInt(Causes.privileged_instruction)),
((id_fp_val || id_csr_fp) && !io.dpath.status.ef, UInt(Causes.fp_disabled)),
(id_syscall, UInt(Causes.syscall)),
(id_rocc_val && !io.dpath.status.er, UInt(Causes.accelerator_disabled))))
ex_reg_xcpt_interrupt := id_interrupt && !take_pc && io.imem.resp.valid
when (id_xcpt) { ex_reg_cause := id_cause }
@@ -496,7 +496,7 @@ class Control(implicit conf: RocketConfiguration) extends Module
val (ex_xcpt, ex_cause) = checkExceptions(List(
(ex_reg_xcpt_interrupt || ex_reg_xcpt, ex_reg_cause),
(ex_reg_fp_val && io.fpu.illegal_rm, UInt(2))))
(ex_reg_fp_val && io.fpu.illegal_rm, UInt(Causes.illegal_instruction))))
mem_reg_replay := replay_ex && !take_pc_wb
mem_reg_xcpt_interrupt := ex_reg_xcpt_interrupt && !take_pc_wb && !mem_reg_replay_next
@@ -533,10 +533,10 @@ class Control(implicit conf: RocketConfiguration) extends Module
val (mem_xcpt, mem_cause) = checkExceptions(List(
(mem_reg_xcpt_interrupt || mem_reg_xcpt, mem_reg_cause),
(mem_reg_mem_val && io.dmem.xcpt.ma.ld, UInt( 8)),
(mem_reg_mem_val && io.dmem.xcpt.ma.st, UInt( 9)),
(mem_reg_mem_val && io.dmem.xcpt.pf.ld, UInt(10)),
(mem_reg_mem_val && io.dmem.xcpt.pf.st, UInt(11))))
(mem_reg_mem_val && io.dmem.xcpt.ma.ld, UInt(Causes.misaligned_load)),
(mem_reg_mem_val && io.dmem.xcpt.ma.st, UInt(Causes.misaligned_store)),
(mem_reg_mem_val && io.dmem.xcpt.pf.ld, UInt(Causes.fault_load)),
(mem_reg_mem_val && io.dmem.xcpt.pf.st, UInt(Causes.fault_store))))
val dcache_kill_mem = mem_reg_wen && io.dmem.replay_next.valid // structural hazard on writeback port
val fpu_kill_mem = mem_reg_fp_val && io.fpu.nack_mem

34
rocket/src/main/scala/instructions.scala
View File

@@ -5,14 +5,14 @@ import Node._
/* Automatically generated by parse-opcodes */
object Instructions {
def JAL = Bits("b?????????????????????????1101111")
def JALR = Bits("b?????????????????000?????1100111")
def BEQ = Bits("b?????????????????000?????1100011")
def BNE = Bits("b?????????????????001?????1100011")
def BLT = Bits("b?????????????????100?????1100011")
def BGE = Bits("b?????????????????101?????1100011")
def BLTU = Bits("b?????????????????110?????1100011")
def BGEU = Bits("b?????????????????111?????1100011")
def JALR = Bits("b?????????????????000?????1100111")
def JAL = Bits("b?????????????????????????1101111")
def LUI = Bits("b?????????????????????????0110111")
def AUIPC = Bits("b?????????????????????????0010111")
def ADDI = Bits("b?????????????????000?????0010011")
@@ -185,6 +185,36 @@ object Instructions {
def CUSTOM3_RD_RS1 = Bits("b?????????????????110?????1111011")
def CUSTOM3_RD_RS1_RS2 = Bits("b?????????????????111?????1111011")
}
object Causes {
val misaligned_fetch = 0x0
val fault_fetch = 0x1
val illegal_instruction = 0x2
val privileged_instruction = 0x3
val fp_disabled = 0x4
val syscall = 0x6
val breakpoint = 0x7
val misaligned_load = 0x8
val misaligned_store = 0x9
val fault_load = 0xa
val fault_store = 0xb
val accelerator_disabled = 0xc
val all = {
val res = collection.mutable.ArrayBuffer[Int]()
res += misaligned_fetch
res += fault_fetch
res += illegal_instruction
res += privileged_instruction
res += fp_disabled
res += syscall
res += breakpoint
res += misaligned_load
res += misaligned_store
res += fault_load
res += fault_store
res += accelerator_disabled
res.toArray
}
}
object CSRs {
val fflags = 0x1
val frm = 0x2