[PATCH 3/3] RISC-V: Support the read-only CSR checking.

[PATCH 3/3] RISC-V: Support the read-only CSR checking.

[Nelson Chu]

CSRRW and CSRRWI always write CSR.  CSRRS, CSRRC, CSRRSI and CSRRCI write CSR
when RS1 isn't zero.  The CSR is read only if the [11:10] bits of CSR address
is 0x3.  The read-only CSR can not be written by the CSR instructions.

	gas/
	* config/tc-riscv.c (riscv_ip): New boolean insn_with_csr to indicate
	we are assembling instruction with CSR.  Call riscv_csr_read_only_check
	after parsing all arguments.
	(enum csr_insn_type): New enum is used to classify the CSR instruction.
	(riscv_csr_insn_type, riscv_csr_read_only_check): New functions.  These
	are used to check if we write a read-only CSR by the CSR instruction.

	* testsuite/gas/riscv/priv-reg-fail-read-only-01.s: New testcase.  Test
	all CSR for the read-only CSR checking.
	* testsuite/gas/riscv/priv-reg-fail-read-only-01.d: Likewise.
	* testsuite/gas/riscv/priv-reg-fail-read-only-01.l: Likewise.
	* testsuite/gas/riscv/priv-reg-fail-read-only-02.s: New testcase.  Test
	all CSR instructions for the read-only CSR checking.
	* testsuite/gas/riscv/priv-reg-fail-read-only-02.d: Likewise.
	* testsuite/gas/riscv/priv-reg-fail-read-only-02.l: Likewise.
---
 gas/config/tc-riscv.c                              |  69 ++++++
 .../gas/riscv/priv-reg-fail-read-only-01.d         |   3 +
 .../gas/riscv/priv-reg-fail-read-only-01.l         |  69 ++++++
 .../gas/riscv/priv-reg-fail-read-only-01.s         | 269 +++++++++++++++++++++
 .../gas/riscv/priv-reg-fail-read-only-02.d         |   3 +
 .../gas/riscv/priv-reg-fail-read-only-02.l         |  25 ++
 .../gas/riscv/priv-reg-fail-read-only-02.s         |  90 +++++++
 7 files changed, 528 insertions(+)
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.d
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.l
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.s
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.d
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.l
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.s

diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index 5972f02..b3fe1aa 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -1486,6 +1486,56 @@ riscv_handle_implicit_zero_offset (expressionS *ep, const char *s)
   return FALSE;
 }
 
+/* All RISC-V CSR instructions belong to one of these classes.  */
+
+enum csr_insn_type
+{
+  INSN_NOT_CSR,
+  INSN_CSRRW,
+  INSN_CSRRS,
+  INSN_CSRRC
+};
+
+/* Return which CSR instruciton is checking.  */
+
+static enum csr_insn_type
+riscv_csr_insn_type (insn_t insn)
+{
+  if (((insn ^ MATCH_CSRRW) & MASK_CSRRW) == 0
+      || ((insn ^ MATCH_CSRRWI) & MASK_CSRRWI) == 0)
+    return INSN_CSRRW;
+  else if (((insn ^ MATCH_CSRRS) & MASK_CSRRS) == 0
+	   || ((insn ^ MATCH_CSRRSI) & MASK_CSRRSI) == 0)
+    return INSN_CSRRS;
+  else if (((insn ^ MATCH_CSRRC) & MASK_CSRRC) == 0
+	   || ((insn ^ MATCH_CSRRCI) & MASK_CSRRCI) == 0)
+    return INSN_CSRRC;
+  else
+    return INSN_NOT_CSR;
+}
+
+/* CSRRW and CSRRWI always write CSR.  CSRRS, CSRRC, CSRRSI and CSRRCI write
+   CSR when RS1 isn't zero.  The CSR is read only if the [11:10] bits of
+   CSR address is 0x3.  */
+
+static bfd_boolean
+riscv_csr_read_only_check (insn_t insn)
+{
+  int csr = (insn & (OP_MASK_CSR << OP_SH_CSR)) >> OP_SH_CSR;
+  int rs1 = (insn & (OP_MASK_RS1 << OP_SH_RS1)) >> OP_SH_RS1;
+  int readonly = (((csr & (0x3 << 10)) >> 10) == 0x3);
+  enum csr_insn_type csr_insn = riscv_csr_insn_type (insn);
+
+  if (readonly
+      && (((csr_insn == INSN_CSRRS
+	    || csr_insn == INSN_CSRRC)
+	   && rs1 != 0)
+	  || csr_insn == INSN_CSRRW))
+    return FALSE;
+
+  return TRUE;
+}
+
 /* This routine assembles an instruction into its binary format.  As a
    side effect, it sets the global variable imm_reloc to the type of
    relocation to do if one of the operands is an address expression.  */
@@ -1504,6 +1554,8 @@ riscv_ip (char *str, struct riscv_cl_insn *ip, expressionS *imm_expr,
   int argnum;
   const struct percent_op_match *p;
   const char *error = "unrecognized opcode";
+  /* Indicate we are assembling instruction with CSR.  */
+  bfd_boolean insn_with_csr = FALSE;
 
   /* Parse the name of the instruction.  Terminate the string if whitespace
      is found so that hash_find only sees the name part of the string.  */
@@ -1550,11 +1602,26 @@ riscv_ip (char *str, struct riscv_cl_insn *ip, expressionS *imm_expr,
 					 : insn->match) == 2
 		      && !riscv_opts.rvc)
 		    break;
+
+		  /* Check if we write a read-only CSR by the CSR
+		     instruction.  */
+		  if (insn_with_csr
+		      && riscv_opts.csr_check
+		      && !riscv_csr_read_only_check (ip->insn_opcode))
+		    {
+		      /* Restore the character in advance, since we want to
+			 report the detailed warning message here.  */
+		      if (save_c)
+			*(argsStart - 1) = save_c;
+		      as_warn (_("Read-only CSR is written `%s'"), str);
+		      insn_with_csr = FALSE;
+		    }
 		}
 	      if (*s != '\0')
 		break;
 	      /* Successful assembly.  */
 	      error = NULL;
+	      insn_with_csr = FALSE;
 	      goto out;
 
 	    case 'C': /* RVC */
@@ -1899,6 +1966,7 @@ rvc_lui:
 	      continue;
 
 	    case 'E':		/* Control register.  */
+	      insn_with_csr = TRUE;
 	      if (reg_lookup (&s, RCLASS_CSR, &regno))
 		INSERT_OPERAND (CSR, *ip, regno);
 	      else
@@ -2219,6 +2287,7 @@ jump:
 	}
       s = argsStart;
       error = _("illegal operands");
+      insn_with_csr = FALSE;
     }
 
 out:
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.d b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.d
new file mode 100644
index 0000000..ae190c0
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.d
@@ -0,0 +1,3 @@
+#as: -march=rv32if -mcsr-check
+#source: priv-reg-fail-read-only-01.s
+#warning_output: priv-reg-fail-read-only-01.l
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.l b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.l
new file mode 100644
index 0000000..7e52bd7
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.l
@@ -0,0 +1,69 @@
+.*Assembler messages:
+.*Warning: Read-only CSR is written `csrw cycle,a1'
+.*Warning: Read-only CSR is written `csrw time,a1'
+.*Warning: Read-only CSR is written `csrw instret,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter3,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter4,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter5,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter6,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter7,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter8,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter9,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter10,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter11,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter12,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter13,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter14,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter15,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter16,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter17,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter18,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter19,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter20,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter21,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter22,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter23,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter24,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter25,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter26,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter27,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter28,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter29,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter30,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter31,a1'
+.*Warning: Read-only CSR is written `csrw cycleh,a1'
+.*Warning: Read-only CSR is written `csrw timeh,a1'
+.*Warning: Read-only CSR is written `csrw instreth,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter3h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter4h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter5h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter6h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter7h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter8h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter9h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter10h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter11h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter12h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter13h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter14h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter15h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter16h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter17h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter18h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter19h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter20h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter21h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter22h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter23h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter24h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter25h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter26h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter27h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter28h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter29h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter30h,a1'
+.*Warning: Read-only CSR is written `csrw hpmcounter31h,a1'
+.*Warning: Read-only CSR is written `csrw mvendorid,a1'
+.*Warning: Read-only CSR is written `csrw marchid,a1'
+.*Warning: Read-only CSR is written `csrw mimpid,a1'
+.*Warning: Read-only CSR is written `csrw mhartid,a1'
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.s b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.s
new file mode 100644
index 0000000..501a52e
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-01.s
@@ -0,0 +1,269 @@
+	.macro csr val
+	csrw \val, a1
+	.endm
+# 1.9.1 registers
+	csr ustatus
+	csr uie
+	csr utvec
+
+	csr uscratch
+	csr uepc
+	csr ucause
+	csr ubadaddr
+	csr uip
+
+	csr fflags
+	csr frm
+	csr fcsr
+
+	csr cycle
+	csr time
+	csr instret
+	csr hpmcounter3
+	csr hpmcounter4
+	csr hpmcounter5
+	csr hpmcounter6
+	csr hpmcounter7
+	csr hpmcounter8
+	csr hpmcounter9
+	csr hpmcounter10
+	csr hpmcounter11
+	csr hpmcounter12
+	csr hpmcounter13
+	csr hpmcounter14
+	csr hpmcounter15
+	csr hpmcounter16
+	csr hpmcounter17
+	csr hpmcounter18
+	csr hpmcounter19
+	csr hpmcounter20
+	csr hpmcounter21
+	csr hpmcounter22
+	csr hpmcounter23
+	csr hpmcounter24
+	csr hpmcounter25
+	csr hpmcounter26
+	csr hpmcounter27
+	csr hpmcounter28
+	csr hpmcounter29
+	csr hpmcounter30
+	csr hpmcounter31
+	csr cycleh
+	csr timeh
+	csr instreth
+	csr hpmcounter3h
+	csr hpmcounter4h
+	csr hpmcounter5h
+	csr hpmcounter6h
+	csr hpmcounter7h
+	csr hpmcounter8h
+	csr hpmcounter9h
+	csr hpmcounter10h
+	csr hpmcounter11h
+	csr hpmcounter12h
+	csr hpmcounter13h
+	csr hpmcounter14h
+	csr hpmcounter15h
+	csr hpmcounter16h
+	csr hpmcounter17h
+	csr hpmcounter18h
+	csr hpmcounter19h
+	csr hpmcounter20h
+	csr hpmcounter21h
+	csr hpmcounter22h
+	csr hpmcounter23h
+	csr hpmcounter24h
+	csr hpmcounter25h
+	csr hpmcounter26h
+	csr hpmcounter27h
+	csr hpmcounter28h
+	csr hpmcounter29h
+	csr hpmcounter30h
+	csr hpmcounter31h
+
+	csr sstatus
+	csr sedeleg
+	csr sideleg
+	csr sie
+	csr stvec
+
+	csr sscratch
+	csr sepc
+	csr scause
+	csr sbadaddr
+	csr sip
+
+	csr sptbr
+
+	csr hstatus
+	csr hedeleg
+	csr hideleg
+	csr hie
+	csr htvec
+
+	csr hscratch
+	csr hepc
+	csr hcause
+	csr hbadaddr
+	csr hip
+
+	csr mvendorid
+	csr marchid
+	csr mimpid
+	csr mhartid
+
+	csr mstatus
+	csr misa
+	csr medeleg
+	csr mideleg
+	csr mie
+	csr mtvec
+
+	csr mscratch
+	csr mepc
+	csr mcause
+	csr mbadaddr
+	csr mip
+
+	csr mbase
+	csr mbound
+	csr mibase
+	csr mibound
+	csr mdbase
+	csr mdbound
+
+	csr mcycle
+	csr minstret
+	csr mhpmcounter3
+	csr mhpmcounter4
+	csr mhpmcounter5
+	csr mhpmcounter6
+	csr mhpmcounter7
+	csr mhpmcounter8
+	csr mhpmcounter9
+	csr mhpmcounter10
+	csr mhpmcounter11
+	csr mhpmcounter12
+	csr mhpmcounter13
+	csr mhpmcounter14
+	csr mhpmcounter15
+	csr mhpmcounter16
+	csr mhpmcounter17
+	csr mhpmcounter18
+	csr mhpmcounter19
+	csr mhpmcounter20
+	csr mhpmcounter21
+	csr mhpmcounter22
+	csr mhpmcounter23
+	csr mhpmcounter24
+	csr mhpmcounter25
+	csr mhpmcounter26
+	csr mhpmcounter27
+	csr mhpmcounter28
+	csr mhpmcounter29
+	csr mhpmcounter30
+	csr mhpmcounter31
+	csr mcycleh
+	csr minstreth
+	csr mhpmcounter3h
+	csr mhpmcounter4h
+	csr mhpmcounter5h
+	csr mhpmcounter6h
+	csr mhpmcounter7h
+	csr mhpmcounter8h
+	csr mhpmcounter9h
+	csr mhpmcounter10h
+	csr mhpmcounter11h
+	csr mhpmcounter12h
+	csr mhpmcounter13h
+	csr mhpmcounter14h
+	csr mhpmcounter15h
+	csr mhpmcounter16h
+	csr mhpmcounter17h
+	csr mhpmcounter18h
+	csr mhpmcounter19h
+	csr mhpmcounter20h
+	csr mhpmcounter21h
+	csr mhpmcounter22h
+	csr mhpmcounter23h
+	csr mhpmcounter24h
+	csr mhpmcounter25h
+	csr mhpmcounter26h
+	csr mhpmcounter27h
+	csr mhpmcounter28h
+	csr mhpmcounter29h
+	csr mhpmcounter30h
+	csr mhpmcounter31h
+
+	csr mucounteren
+	csr mscounteren
+	csr mhcounteren
+
+	csr mhpmevent3
+	csr mhpmevent4
+	csr mhpmevent5
+	csr mhpmevent6
+	csr mhpmevent7
+	csr mhpmevent8
+	csr mhpmevent9
+	csr mhpmevent10
+	csr mhpmevent11
+	csr mhpmevent12
+	csr mhpmevent13
+	csr mhpmevent14
+	csr mhpmevent15
+	csr mhpmevent16
+	csr mhpmevent17
+	csr mhpmevent18
+	csr mhpmevent19
+	csr mhpmevent20
+	csr mhpmevent21
+	csr mhpmevent22
+	csr mhpmevent23
+	csr mhpmevent24
+	csr mhpmevent25
+	csr mhpmevent26
+	csr mhpmevent27
+	csr mhpmevent28
+	csr mhpmevent29
+	csr mhpmevent30
+	csr mhpmevent31
+
+	csr tselect
+	csr tdata1
+	csr tdata2
+	csr tdata3
+
+	csr dcsr
+	csr dpc
+	csr dscratch
+# 1.10 registers
+	csr utval
+
+	csr scounteren
+	csr stval
+	csr satp
+
+	csr mcounteren
+	csr mtval
+
+	csr pmpcfg0
+	csr pmpcfg1
+	csr pmpcfg2
+	csr pmpcfg3
+	csr pmpaddr0
+	csr pmpaddr1
+	csr pmpaddr2
+	csr pmpaddr3
+	csr pmpaddr4
+	csr pmpaddr5
+	csr pmpaddr6
+	csr pmpaddr7
+	csr pmpaddr8
+	csr pmpaddr9
+	csr pmpaddr10
+	csr pmpaddr11
+	csr pmpaddr12
+	csr pmpaddr13
+	csr pmpaddr14
+	csr pmpaddr15
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.d b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.d
new file mode 100644
index 0000000..3c4715f
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.d
@@ -0,0 +1,3 @@
+#as: -march=rv32if -mcsr-check
+#source: priv-reg-fail-read-only-02.s
+#warning_output: priv-reg-fail-read-only-02.l
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.l b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.l
new file mode 100644
index 0000000..660f19d
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.l
@@ -0,0 +1,25 @@
+.*Assembler messages:
+.*Warning: Read-only CSR is written `csrrw a0,cycle,a1'
+.*Warning: Read-only CSR is written `csrrw a0,cycle,zero'
+.*Warning: Read-only CSR is written `csrrw zero,cycle,a1'
+.*Warning: Read-only CSR is written `csrrw zero,cycle,zero'
+.*Warning: Read-only CSR is written `csrw cycle,a1'
+.*Warning: Read-only CSR is written `csrw cycle,zero'
+.*Warning: Read-only CSR is written `csrrwi a0,cycle,0xb'
+.*Warning: Read-only CSR is written `csrrwi a0,cycle,0x0'
+.*Warning: Read-only CSR is written `csrrwi zero,cycle,0xb'
+.*Warning: Read-only CSR is written `csrrwi zero,cycle,0x0'
+.*Warning: Read-only CSR is written `csrwi cycle,0xb'
+.*Warning: Read-only CSR is written `csrwi cycle,0x0'
+.*Warning: Read-only CSR is written `csrrs a0,cycle,a1'
+.*Warning: Read-only CSR is written `csrrs zero,cycle,a1'
+.*Warning: Read-only CSR is written `csrs cycle,a0'
+.*Warning: Read-only CSR is written `csrrsi a0,cycle,0xb'
+.*Warning: Read-only CSR is written `csrrsi zero,cycle,0xb'
+.*Warning: Read-only CSR is written `csrsi cycle,0xb'
+.*Warning: Read-only CSR is written `csrrc a0,cycle,a1'
+.*Warning: Read-only CSR is written `csrrc zero,cycle,a1'
+.*Warning: Read-only CSR is written `csrc cycle,a0'
+.*Warning: Read-only CSR is written `csrrci a0,cycle,0xb'
+.*Warning: Read-only CSR is written `csrrci zero,cycle,0xb'
+.*Warning: Read-only CSR is written `csrci cycle,0xb'
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.s b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.s
new file mode 100644
index 0000000..7afb26e
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-read-only-02.s
@@ -0,0 +1,90 @@
+# CSRRW and CSRRWI always write CSR
+# CSRRS, CSRRC, CSRRSI and CSRRCI write CSR when rs isn't zero.
+
+# csrrw rd, csr, rs
+	csrrw	a0, ustatus, a1
+	csrrw	a0, cycle, a1
+	csrrw	a0, cycle, zero
+	csrrw	zero, cycle, a1
+	csrrw	zero, cycle, zero
+	fscsr	a0, a1
+	fsrm	a0, a1
+	fsflags a0, a1
+# csrrw zero, csr, rs
+	csrw	ustatus, a1
+	csrw	cycle, a1
+	csrw	cycle, zero
+	fscsr	a1
+	fsrm	a1
+	fsflags a1
+# csrrwi rd, csr, imm
+	csrrwi	a0, ustatus, 0xb
+	csrrwi	a0, cycle, 0xb
+	csrrwi	a0, cycle, 0x0
+	csrrwi	zero, cycle, 0xb
+	csrrwi	zero, cycle, 0x0
+# csrrwi zero, csr, imm
+	csrwi   ustatus, 0xb
+	csrwi   cycle, 0xb
+	csrwi   cycle, 0x0
+
+# csrrs rd, csr, rs
+	csrrs	a0, ustatus, a1
+	csrrs	a0, cycle, a1
+	csrrs	a0, cycle, zero
+	csrrs	zero, cycle, a1
+	csrrs	zero, cycle, zero
+# csrrs rd, csr, zero
+	csrr	a0, ustatus
+	csrr	a0, cycle
+	csrr	zero, cycle
+	rdinstret  a0
+	rdinstret  zero
+	rdinstreth a0
+	rdinstreth zero
+	rdcycle	   a0
+	rdcycle    zero
+	rdcycleh   a0
+	rdcycleh   zero
+	rdtime	a0
+	rdtime  zero
+	rdtimeh	a0
+	rdtimeh zero
+	frcsr	a0
+	frrm	a0
+	frflags a0
+# csrrs zero, csr, rs
+	csrs	ustatus, a0
+	csrs	cycle, a0
+	csrs	cycle, zero
+# csrrsi rd, csr, imm
+	csrrsi	a0, ustatus, 0xb
+	csrrsi	a0, cycle, 0xb
+	csrrsi	a0, cycle, 0x0
+	csrrsi	zero, cycle, 0xb
+	csrrsi	zero, cycle, 0x0
+# csrrsi zero, csr, imm
+	csrsi	ustatus, 0xb
+	csrsi	cycle, 0xb
+	csrsi	cycle, 0x0
+
+# csrrc a0, csr, a1
+	csrrc	a0, ustatus, a1
+	csrrc	a0, cycle, a1
+	csrrc	a0, cycle, zero
+	csrrc	zero, cycle, a1
+	csrrc	zero, cycle, zero
+# csrrc zero, csr, rs
+	csrc	ustatus, a0
+	csrc	cycle, a0
+	csrc	cycle, zero
+# csrrci rd, csr, imm
+	csrrci	a0, ustatus, 0xb
+	csrrci	a0, cycle, 0xb
+	csrrci	a0, cycle, 0x0
+	csrrci	zero, cycle, 0xb
+	csrrci	zero, cycle, 0x0
+# csrrci zero, csr, imm
+	csrci	ustatus, 0xb
+	csrci	cycle, 0xb
+	csrci	cycle, 0x0
-- 
2.7.4

[PATCH 2/3] RISC-V: Disable the CSR checking by default.

[Nelson Chu]

Add new .option `csr-check/no-csr-check` and GAS option `-mcsr-check
/-mno-csr-check` to enbale/disable the CSR checking.  Disable the CSR
checking by default.

	gas/
	* config/tc-riscv.c: Add new .option and GAS options to enbale/disable
	the CSR checking.  We disable the CSR checking by default.
	(reg_lookup_internal): Check the `riscv_opts.csr_check`
	before we doing the CSR checking.

	* doc/c-riscv.texi: Add description for the new .option and assembler
	options.

	* testsuite/gas/riscv/priv-reg-fail-fext.d: Add `-mcsr-check` to enable
	the CSR checking.
	* testsuite/gas/riscv/priv-reg-fail-rv32-only.d: Likewise.
---
 gas/config/tc-riscv.c                             | 22 +++++++++++++++++++++-
 gas/doc/c-riscv.texi                              | 13 +++++++++++++
 gas/testsuite/gas/riscv/priv-reg-fail-fext.d      |  2 +-
 gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d |  2 +-
 4 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index 2f95d41..5972f02 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -83,6 +83,7 @@ struct riscv_set_options
   int rve; /* Generate RVE code.  */
   int relax; /* Emit relocs the linker is allowed to relax.  */
   int arch_attr; /* Emit arch attribute.  */
+  int csr_check; /* Enable the CSR checking.  */
 };
 
 static struct riscv_set_options riscv_opts =
@@ -92,6 +93,7 @@ static struct riscv_set_options riscv_opts =
   0,	/* rve */
   1,	/* relax */
   DEFAULT_RISCV_ATTR, /* arch_attr */
+  0.	/* csr_check */
 };
 
 static void
@@ -572,7 +574,9 @@ reg_lookup_internal (const char *s, enum reg_class class)
   if (riscv_opts.rve && class == RCLASS_GPR && DECODE_REG_NUM (r) > 15)
     return -1;
 
-  if (class == RCLASS_CSR && !reg_csr_lookup_internal (s))
+  if (class == RCLASS_CSR
+      && riscv_opts.csr_check
+      && !reg_csr_lookup_internal (s))
     return -1;
 
   return DECODE_REG_NUM (r);
@@ -2272,6 +2276,8 @@ enum options
   OPTION_NO_RELAX,
   OPTION_ARCH_ATTR,
   OPTION_NO_ARCH_ATTR,
+  OPTION_CSR_CHECK,
+  OPTION_NO_CSR_CHECK,
   OPTION_END_OF_ENUM
 };
 
@@ -2286,6 +2292,8 @@ struct option md_longopts[] =
   {"mno-relax", no_argument, NULL, OPTION_NO_RELAX},
   {"march-attr", no_argument, NULL, OPTION_ARCH_ATTR},
   {"mno-arch-attr", no_argument, NULL, OPTION_NO_ARCH_ATTR},
+  {"mcsr-check", no_argument, NULL, OPTION_CSR_CHECK},
+  {"mno-csr-check", no_argument, NULL, OPTION_NO_CSR_CHECK},
 
   {NULL, no_argument, NULL, 0}
 };
@@ -2364,6 +2372,14 @@ md_parse_option (int c, const char *arg)
       riscv_opts.arch_attr = FALSE;
       break;
 
+    case OPTION_CSR_CHECK:
+      riscv_opts.csr_check = TRUE;
+      break;
+
+    case OPTION_NO_CSR_CHECK:
+      riscv_opts.csr_check = FALSE;
+      break;
+
     default:
       return 0;
     }
@@ -2756,6 +2772,10 @@ s_riscv_option (int x ATTRIBUTE_UNUSED)
     riscv_opts.relax = TRUE;
   else if (strcmp (name, "norelax") == 0)
     riscv_opts.relax = FALSE;
+  else if (strcmp (name, "csr-check") == 0)
+    riscv_opts.csr_check = TRUE;
+  else if (strcmp (name, "no-csr-check") == 0)
+    riscv_opts.csr_check = FALSE;
   else if (strcmp (name, "push") == 0)
     {
       struct riscv_option_stack *s;
diff --git a/gas/doc/c-riscv.texi b/gas/doc/c-riscv.texi
index 0976651..83187dc 100644
--- a/gas/doc/c-riscv.texi
+++ b/gas/doc/c-riscv.texi
@@ -59,6 +59,15 @@ required to materialize symbol addresses. (default)
 @item -mno-relax
 Don't do linker relaxations.
 
+@cindex @samp{-mcsr-check} option, RISC-V
+@item -mcsr-check
+Enable the CSR checking for the ISA-dependent CRS and the read-only CSR.
+The ISA-dependent CSR are only valid when the specific ISA is set.  The
+read-only CSR can not be written by the CSR instructions.
+
+@cindex @samp{-mno-csr-check} option, RISC-V
+@item -mno-csr-check
+Don't do CSR cheching.
 @end table
 @c man end
 
@@ -160,6 +169,10 @@ opportunistically relax some code sequences, but sometimes this behavior is not
 desirable.
 @end table
 
+@item csr-check
+@itemx no-csr-check
+Enables or disables the CSR checking.
+
 @cindex INSN directives
 @item .insn @var{value}
 @itemx .insn @var{value}
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-fext.d b/gas/testsuite/gas/riscv/priv-reg-fail-fext.d
index 78ab758..da53566 100644
--- a/gas/testsuite/gas/riscv/priv-reg-fail-fext.d
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-fext.d
@@ -1,3 +1,3 @@
-#as: -march=rv32i
+#as: -march=rv32i -mcsr-check
 #source: priv-reg.s
 #warning_output: priv-reg-fail-fext.l
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d b/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d
index 5dc840a..d71b261 100644
--- a/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d
@@ -1,3 +1,3 @@
-#as: -march=rv64if
+#as: -march=rv64if -mcsr-check
 #source: priv-reg.s
 #warning_output: priv-reg-fail-rv32-only.l
-- 
2.7.4

[PATCH v5 0/3] RISC-V: Support more rigorous check for CSR

[Nelson Chu]

Hi binutils,

I get some feedbacks from Andrew Burgess of gdb side.  Therefroe I update the
series of patches.  There are some differences between v5 version and v3 version
that Jim reviewed, shown as follows:

1. Implement the draft of CSR spec is inadvisable, so I remove the first patch
of v3 version.

2. Reorder the patches.  Move the patch "RISC-V: Disable the CSR checking by
default" to the second patch.


The detailed of patches:

* [PATCH v5 1/3] RISC-V: Support the ISA-dependent CSR checking.
a. Add missing comments for each function.
b. Add -march=rv32if option to the csr-dw-regnum test case.
c. Report warning messages rather than error for the CSR cheking.
d. Keep the consistent usage in gas/config/tc-riscv.c (from Andrew's suggestion)
d-1. Change the 'typedef struct {...} riscv_csr_extra' to
'struct riscv_csr_extra {...}'.
d-2. Use 'if (hash_error != NULL)' in init_opcode_hash and riscv_init_csr_hash, since
hash_error is not a boolean.

* [PATCH v5 2/3] RISC-V: Disable the CSR checking by default.

* [PATCH v5 3/3] RISC-V: Support the read-only CSR checking.


Thanks
Nelson

[PATCH 1/3] RISC-V: Support the ISA-dependent CSR checking.

[Nelson Chu]

According to the riscv privilege spec, some CSR are only valid when rv32 or
the specific extension is set.  We extend the DECLARE_CSR and DECLARE_CSR_ALIAS
to record more informaton we need, and then check whether the CSR is valid
according to these information.  We report warning message when the CSR is
invalid, so we have a choice between error and warning by --fatal-warnings
option.  Also, a --no-warn/-W option is used to turn the warnings off, if
people don't want the warnings.

	gas/
	* config/tc-riscv.c (enum riscv_csr_class): New enum.  Used to decide
	whether or not this CSR is legal in the current ISA string.
	(struct riscv_csr_extra): New structure to hold all extra information
	of CSR.
	(riscv_init_csr_hash): New function.  According to the DECLARE_CSR and
	DECLARE_CSR_ALIAS, insert CSR extra information into csr_extra_hash.
	Call hash_reg_name to insert CSR address into reg_names_hash.
	(md_begin): Call riscv_init_csr_hashes for each DECLARE_CSR.
	(reg_csr_lookup_internal, riscv_csr_class_check): New functions.
	Decide whether the CSR is valid according to the csr_extra_hash.
	(init_opcode_hash): Update 'if (hash_error != NULL)' as hash_error is
	not a boolean.  This is same as riscv_init_csr_hash, so keep the
	consistent usage.

	* testsuite/gas/riscv/csr-dw-regnums.d: Add -march=rv32if option.
	* testsuite/gas/riscv/priv-reg.d: Add f-ext by -march option.
	* testsuite/gas/riscv/priv-reg-fail-fext.d: New testcase.  The source
	file is `priv-reg.s`, and the ISA is rv32i without f-ext, so the
	f-ext CSR are not allowed.
	* testsuite/gas/riscv/priv-reg-fail-fext.l: Likewise.
	* testsuite/gas/riscv/priv-reg-fail-rv32-only.d: New testcase.  The
	source file is `priv-reg.s`, and the ISA is rv64if, so the
	rv32-only CSR are not allowed.
	* testsuite/gas/riscv/priv-reg-fail-rv32-only.l: Likewise.

	include/
	* opcode/riscv-opc.h: Extend DECLARE_CSR and DECLARE_CSR_ALIAS to
	record riscv_csr_class.

	opcodes/
	* riscv-dis.c (print_insn_args): Updated since the DECLARE_CSR is changed.

	gdb/
	* riscv-tdep.c: Updated since the DECLARE_CSR is changed.
	* riscv-tdep.h: Likewise.
	* features/riscv/rebuild-csr-xml.sh: Generate the 64bit-csr.xml without
	rv32-only CSR.
	* features/riscv/64bit-csr.xml: Regernated.

	binutils/
	* dwarf.c: Updated since the DECLARE_CSR is changed.
---
 binutils/dwarf.c                                  |   2 +-
 gas/config/tc-riscv.c                             |  99 ++++-
 gas/testsuite/gas/riscv/csr-dw-regnums.d          |   2 +-
 gas/testsuite/gas/riscv/priv-reg-fail-fext.d      |   3 +
 gas/testsuite/gas/riscv/priv-reg-fail-fext.l      |   4 +
 gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d |   3 +
 gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.l |  66 +++
 gas/testsuite/gas/riscv/priv-reg.d                |   2 +-
 gdb/features/riscv/64bit-csr.xml                  |  65 ---
 gdb/features/riscv/rebuild-csr-xml.sh             |  10 +-
 gdb/riscv-tdep.c                                  |   6 +-
 gdb/riscv-tdep.h                                  |   2 +-
 include/opcode/riscv-opc.h                        | 488 +++++++++++-----------
 opcodes/riscv-dis.c                               |   2 +-
 14 files changed, 429 insertions(+), 325 deletions(-)
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-fext.d
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-fext.l
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d
 create mode 100644 gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.l

diff --git a/binutils/dwarf.c b/binutils/dwarf.c
index 6ecfab5..2403ac7 100644
--- a/binutils/dwarf.c
+++ b/binutils/dwarf.c
@@ -7381,7 +7381,7 @@ regname_internal_riscv (unsigned int regno)
 	 document.  */
       switch (regno)
 	{
-#define DECLARE_CSR(NAME,VALUE) case VALUE + 4096: name = #NAME; break;
+#define DECLARE_CSR(NAME,VALUE,CLASS) case VALUE + 4096: name = #NAME; break;
 #include "opcode/riscv-opc.h"
 #undef DECLARE_CSR
 
diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index 21fff8f..2f95d41 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -455,6 +455,7 @@ enum reg_class
 };
 
 static struct hash_control *reg_names_hash = NULL;
+static struct hash_control *csr_extra_hash = NULL;
 
 #define ENCODE_REG_HASH(cls, n) \
   ((void *)(uintptr_t)((n) * RCLASS_MAX + (cls) + 1))
@@ -480,6 +481,86 @@ hash_reg_names (enum reg_class class, const char * const names[], unsigned n)
     hash_reg_name (class, names[i], i);
 }
 
+/* All RISC-V CSRs belong to one of these classes.  */
+
+enum riscv_csr_class
+{
+  CSR_CLASS_NONE,
+
+  CSR_CLASS_I,
+  CSR_CLASS_I_32,	/* rv32 only */
+  CSR_CLASS_F,		/* f-ext only */
+};
+
+/* This structure holds all restricted conditions for a CSR.  */
+
+struct riscv_csr_extra
+{
+  /* Class to which this CSR belongs.  Used to decide whether or
+     not this CSR is legal in the current -march context.  */
+  enum riscv_csr_class csr_class;
+};
+
+/* Init two hashes, csr_extra_hash and reg_names_hash, for CSR.  */
+
+static void
+riscv_init_csr_hashes (const char *name,
+		       unsigned address,
+		       enum riscv_csr_class class)
+{
+  struct riscv_csr_extra *entry = XNEW (struct riscv_csr_extra);
+  entry->csr_class = class;
+
+  const char *hash_error =
+    hash_insert (csr_extra_hash, name, (void *) entry);
+  if (hash_error != NULL)
+    {
+      fprintf (stderr, _("internal error: can't hash `%s': %s\n"),
+		      name, hash_error);
+      /* Probably a memory allocation problem?  Give up now.  */
+	as_fatal (_("Broken assembler.  No assembly attempted."));
+    }
+
+  hash_reg_name (RCLASS_CSR, name, address);
+}
+
+/* Check wether the CSR is valid according to the ISA.  */
+
+static bfd_boolean
+riscv_csr_class_check (enum riscv_csr_class csr_class)
+{
+  switch (csr_class)
+    {
+    case CSR_CLASS_I: return riscv_subset_supports ("i");
+    case CSR_CLASS_F: return riscv_subset_supports ("f");
+    case CSR_CLASS_I_32:
+      return (xlen == 32 && riscv_subset_supports ("i"));
+
+    default:
+      return FALSE;
+    }
+}
+
+/* If the CSR is defined, then we call `riscv_csr_class_check` to do the
+   further checking.  Return FALSE if the CSR is not defined.  Otherwise,
+   return TRUE.  */
+
+static bfd_boolean
+reg_csr_lookup_internal (const char *s)
+{
+  struct riscv_csr_extra *r =
+    (struct riscv_csr_extra *) hash_find (csr_extra_hash, s);
+
+  if (r == NULL)
+    return FALSE;
+
+  /* We just report the warning when the CSR is invalid.  */
+  if (!riscv_csr_class_check (r->csr_class))
+    as_warn (_("Invalid CSR `%s' for the current ISA"), s);
+
+  return TRUE;
+}
+
 static unsigned int
 reg_lookup_internal (const char *s, enum reg_class class)
 {
@@ -491,6 +572,9 @@ reg_lookup_internal (const char *s, enum reg_class class)
   if (riscv_opts.rve && class == RCLASS_GPR && DECODE_REG_NUM (r) > 15)
     return -1;
 
+  if (class == RCLASS_CSR && !reg_csr_lookup_internal (s))
+    return -1;
+
   return DECODE_REG_NUM (r);
 }
 
@@ -721,7 +805,7 @@ init_opcode_hash (const struct riscv_opcode *opcodes,
       const char *hash_error =
 	hash_insert (hash, name, (void *) &opcodes[i]);
 
-      if (hash_error)
+      if (hash_error != NULL)
 	{
 	  fprintf (stderr, _("internal error: can't hash `%s': %s\n"),
 		   opcodes[i].name, hash_error);
@@ -769,18 +853,19 @@ md_begin (void)
   hash_reg_names (RCLASS_GPR, riscv_gpr_names_abi, NGPR);
   hash_reg_names (RCLASS_FPR, riscv_fpr_names_numeric, NFPR);
   hash_reg_names (RCLASS_FPR, riscv_fpr_names_abi, NFPR);
-
   /* Add "fp" as an alias for "s0".  */
   hash_reg_name (RCLASS_GPR, "fp", 8);
 
-  opcode_names_hash = hash_new ();
-  init_opcode_names_hash ();
-
-#define DECLARE_CSR(name, num) hash_reg_name (RCLASS_CSR, #name, num);
-#define DECLARE_CSR_ALIAS(name, num) DECLARE_CSR(name, num);
+  /* Create and insert CSR hash tables.  */
+  csr_extra_hash = hash_new ();
+#define DECLARE_CSR(name, num, class) riscv_init_csr_hashes (#name, num, class);
+#define DECLARE_CSR_ALIAS(name, num, class) DECLARE_CSR(name, num, class);
 #include "opcode/riscv-opc.h"
 #undef DECLARE_CSR
 
+  opcode_names_hash = hash_new ();
+  init_opcode_names_hash ();
+
   /* Set the default alignment for the text section.  */
   record_alignment (text_section, riscv_opts.rvc ? 1 : 2);
 }
diff --git a/gas/testsuite/gas/riscv/csr-dw-regnums.d b/gas/testsuite/gas/riscv/csr-dw-regnums.d
index 597747c..a7b415e 100644
--- a/gas/testsuite/gas/riscv/csr-dw-regnums.d
+++ b/gas/testsuite/gas/riscv/csr-dw-regnums.d
@@ -1,4 +1,4 @@
-#as:
+#as: -march=rv32if
 #objdump: --dwarf=frames
 
 
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-fext.d b/gas/testsuite/gas/riscv/priv-reg-fail-fext.d
new file mode 100644
index 0000000..78ab758
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-fext.d
@@ -0,0 +1,3 @@
+#as: -march=rv32i
+#source: priv-reg.s
+#warning_output: priv-reg-fail-fext.l
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-fext.l b/gas/testsuite/gas/riscv/priv-reg-fail-fext.l
new file mode 100644
index 0000000..76818c8
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-fext.l
@@ -0,0 +1,4 @@
+.*Assembler messages:
+.*Warning: Invalid CSR `fflags' for the current ISA
+.*Warning: Invalid CSR `frm' for the current ISA
+.*Warning: Invalid CSR `fcsr' for the current ISA
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d b/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d
new file mode 100644
index 0000000..5dc840a
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.d
@@ -0,0 +1,3 @@
+#as: -march=rv64if
+#source: priv-reg.s
+#warning_output: priv-reg-fail-rv32-only.l
diff --git a/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.l b/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.l
new file mode 100644
index 0000000..9123672
--- /dev/null
+++ b/gas/testsuite/gas/riscv/priv-reg-fail-rv32-only.l
@@ -0,0 +1,66 @@
+.*Assembler messages:
+.*Warning: Invalid CSR `cycleh' for the current ISA
+.*Warning: Invalid CSR `timeh' for the current ISA
+.*Warning: Invalid CSR `instreth' for the current ISA
+.*Warning: Invalid CSR `hpmcounter3h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter4h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter5h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter6h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter7h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter8h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter9h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter10h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter11h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter12h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter13h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter14h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter15h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter16h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter17h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter18h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter19h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter20h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter21h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter22h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter23h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter24h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter25h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter26h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter27h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter28h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter29h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter30h' for the current ISA
+.*Warning: Invalid CSR `hpmcounter31h' for the current ISA
+.*Warning: Invalid CSR `mcycleh' for the current ISA
+.*Warning: Invalid CSR `minstreth' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter3h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter4h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter5h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter6h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter7h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter8h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter9h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter10h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter11h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter12h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter13h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter14h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter15h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter16h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter17h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter18h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter19h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter20h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter21h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter22h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter23h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter24h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter25h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter26h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter27h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter28h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter29h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter30h' for the current ISA
+.*Warning: Invalid CSR `mhpmcounter31h' for the current ISA
+.*Warning: Invalid CSR `pmpcfg1' for the current ISA
+.*Warning: Invalid CSR `pmpcfg3' for the current ISA
diff --git a/gas/testsuite/gas/riscv/priv-reg.d b/gas/testsuite/gas/riscv/priv-reg.d
index d8ec868..8b7a7bf 100644
--- a/gas/testsuite/gas/riscv/priv-reg.d
+++ b/gas/testsuite/gas/riscv/priv-reg.d
@@ -1,4 +1,4 @@
-#as: -march=rv32i
+#as: -march=rv32if
 #objdump: -dr
 
 .*:[ 	]+file format .*
diff --git a/gdb/features/riscv/64bit-csr.xml b/gdb/features/riscv/64bit-csr.xml
index cf15a7f..8ec0ffe 100644
--- a/gdb/features/riscv/64bit-csr.xml
+++ b/gdb/features/riscv/64bit-csr.xml
@@ -50,38 +50,6 @@
   <reg name="hpmcounter29" bitsize="64"/>
   <reg name="hpmcounter30" bitsize="64"/>
   <reg name="hpmcounter31" bitsize="64"/>
-  <reg name="cycleh" bitsize="64"/>
-  <reg name="timeh" bitsize="64"/>
-  <reg name="instreth" bitsize="64"/>
-  <reg name="hpmcounter3h" bitsize="64"/>
-  <reg name="hpmcounter4h" bitsize="64"/>
-  <reg name="hpmcounter5h" bitsize="64"/>
-  <reg name="hpmcounter6h" bitsize="64"/>
-  <reg name="hpmcounter7h" bitsize="64"/>
-  <reg name="hpmcounter8h" bitsize="64"/>
-  <reg name="hpmcounter9h" bitsize="64"/>
-  <reg name="hpmcounter10h" bitsize="64"/>
-  <reg name="hpmcounter11h" bitsize="64"/>
-  <reg name="hpmcounter12h" bitsize="64"/>
-  <reg name="hpmcounter13h" bitsize="64"/>
-  <reg name="hpmcounter14h" bitsize="64"/>
-  <reg name="hpmcounter15h" bitsize="64"/>
-  <reg name="hpmcounter16h" bitsize="64"/>
-  <reg name="hpmcounter17h" bitsize="64"/>
-  <reg name="hpmcounter18h" bitsize="64"/>
-  <reg name="hpmcounter19h" bitsize="64"/>
-  <reg name="hpmcounter20h" bitsize="64"/>
-  <reg name="hpmcounter21h" bitsize="64"/>
-  <reg name="hpmcounter22h" bitsize="64"/>
-  <reg name="hpmcounter23h" bitsize="64"/>
-  <reg name="hpmcounter24h" bitsize="64"/>
-  <reg name="hpmcounter25h" bitsize="64"/>
-  <reg name="hpmcounter26h" bitsize="64"/>
-  <reg name="hpmcounter27h" bitsize="64"/>
-  <reg name="hpmcounter28h" bitsize="64"/>
-  <reg name="hpmcounter29h" bitsize="64"/>
-  <reg name="hpmcounter30h" bitsize="64"/>
-  <reg name="hpmcounter31h" bitsize="64"/>
   <reg name="sstatus" bitsize="64"/>
   <reg name="sedeleg" bitsize="64"/>
   <reg name="sideleg" bitsize="64"/>
@@ -111,9 +79,7 @@
   <reg name="mtval" bitsize="64"/>
   <reg name="mip" bitsize="64"/>
   <reg name="pmpcfg0" bitsize="64"/>
-  <reg name="pmpcfg1" bitsize="64"/>
   <reg name="pmpcfg2" bitsize="64"/>
-  <reg name="pmpcfg3" bitsize="64"/>
   <reg name="pmpaddr0" bitsize="64"/>
   <reg name="pmpaddr1" bitsize="64"/>
   <reg name="pmpaddr2" bitsize="64"/>
@@ -161,37 +127,6 @@
   <reg name="mhpmcounter29" bitsize="64"/>
   <reg name="mhpmcounter30" bitsize="64"/>
   <reg name="mhpmcounter31" bitsize="64"/>
-  <reg name="mcycleh" bitsize="64"/>
-  <reg name="minstreth" bitsize="64"/>
-  <reg name="mhpmcounter3h" bitsize="64"/>
-  <reg name="mhpmcounter4h" bitsize="64"/>
-  <reg name="mhpmcounter5h" bitsize="64"/>
-  <reg name="mhpmcounter6h" bitsize="64"/>
-  <reg name="mhpmcounter7h" bitsize="64"/>
-  <reg name="mhpmcounter8h" bitsize="64"/>
-  <reg name="mhpmcounter9h" bitsize="64"/>
-  <reg name="mhpmcounter10h" bitsize="64"/>
-  <reg name="mhpmcounter11h" bitsize="64"/>
-  <reg name="mhpmcounter12h" bitsize="64"/>
-  <reg name="mhpmcounter13h" bitsize="64"/>
-  <reg name="mhpmcounter14h" bitsize="64"/>
-  <reg name="mhpmcounter15h" bitsize="64"/>
-  <reg name="mhpmcounter16h" bitsize="64"/>
-  <reg name="mhpmcounter17h" bitsize="64"/>
-  <reg name="mhpmcounter18h" bitsize="64"/>
-  <reg name="mhpmcounter19h" bitsize="64"/>
-  <reg name="mhpmcounter20h" bitsize="64"/>
-  <reg name="mhpmcounter21h" bitsize="64"/>
-  <reg name="mhpmcounter22h" bitsize="64"/>
-  <reg name="mhpmcounter23h" bitsize="64"/>
-  <reg name="mhpmcounter24h" bitsize="64"/>
-  <reg name="mhpmcounter25h" bitsize="64"/>
-  <reg name="mhpmcounter26h" bitsize="64"/>
-  <reg name="mhpmcounter27h" bitsize="64"/>
-  <reg name="mhpmcounter28h" bitsize="64"/>
-  <reg name="mhpmcounter29h" bitsize="64"/>
-  <reg name="mhpmcounter30h" bitsize="64"/>
-  <reg name="mhpmcounter31h" bitsize="64"/>
   <reg name="mhpmevent3" bitsize="64"/>
   <reg name="mhpmevent4" bitsize="64"/>
   <reg name="mhpmevent5" bitsize="64"/>
diff --git a/gdb/features/riscv/rebuild-csr-xml.sh b/gdb/features/riscv/rebuild-csr-xml.sh
index e21aaba..1adb180 100755
--- a/gdb/features/riscv/rebuild-csr-xml.sh
+++ b/gdb/features/riscv/rebuild-csr-xml.sh
@@ -19,10 +19,18 @@ function gen_csr_xml ()
 <feature name="org.gnu.gdb.riscv.csr">
 EOF
 
+if [ "$bitsize" = "64" ]; then
     grep "^DECLARE_CSR(" ${RISCV_OPC_FILE} \
-        | sed -e "s!DECLARE_CSR(\(.*\), .*!  <reg name=\"\1\" bitsize=\"$bitsize\"/>!"
+        | sed /CSR_CLASS_.*_32/d \
+        | sed -e "s!DECLARE_CSR(\(.*\), .*, .*!  <reg name=\"\1\" bitsize=\"$bitsize\"/>!"
 
     echo "</feature>"
+else
+    grep "^DECLARE_CSR(" ${RISCV_OPC_FILE} \
+        | sed -e "s!DECLARE_CSR(\(.*\), .*, .*!  <reg name=\"\1\" bitsize=\"$bitsize\"/>!"
+
+    echo "</feature>"
+fi
 }
 
 gen_csr_xml 32 > ${RISCV_FEATURE_DIR}/32bit-csr.xml
diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c
index a14ef4d..43970c9 100644
--- a/gdb/riscv-tdep.c
+++ b/gdb/riscv-tdep.c
@@ -240,7 +240,7 @@ static struct riscv_register_feature riscv_csr_feature =
 {
  "org.gnu.gdb.riscv.csr",
  {
-#define DECLARE_CSR(NAME,VALUE) \
+#define DECLARE_CSR(NAME,VALUE,CLASS) \
   { RISCV_ ## VALUE ## _REGNUM, { # NAME }, false },
 #include "opcode/riscv-opc.h"
 #undef DECLARE_CSR
@@ -534,7 +534,7 @@ riscv_register_name (struct gdbarch *gdbarch, int regnum)
 
   if (regnum >= RISCV_FIRST_CSR_REGNUM && regnum <= RISCV_LAST_CSR_REGNUM)
     {
-#define DECLARE_CSR(NAME,VALUE) \
+#define DECLARE_CSR(NAME,VALUE,CLASS) \
       case RISCV_ ## VALUE ## _REGNUM: return # NAME;
 
       switch (regnum)
@@ -870,7 +870,7 @@ riscv_is_regnum_a_named_csr (int regnum)
 
   switch (regnum)
     {
-#define DECLARE_CSR(name, num) case RISCV_ ## num ## _REGNUM:
+#define DECLARE_CSR(name, num, class) case RISCV_ ## num ## _REGNUM:
 #include "opcode/riscv-opc.h"
 #undef DECLARE_CSR
       return true;
diff --git a/gdb/riscv-tdep.h b/gdb/riscv-tdep.h
index aaed33c..90bae08 100644
--- a/gdb/riscv-tdep.h
+++ b/gdb/riscv-tdep.h
@@ -44,7 +44,7 @@ enum
   RISCV_LAST_FP_REGNUM = 64,	/* Last Floating Point Register */
 
   RISCV_FIRST_CSR_REGNUM = 65,  /* First CSR */
-#define DECLARE_CSR(name, num) \
+#define DECLARE_CSR(name, num, class) \
   RISCV_ ## num ## _REGNUM = RISCV_FIRST_CSR_REGNUM + num,
 #include "opcode/riscv-opc.h"
 #undef DECLARE_CSR
diff --git a/include/opcode/riscv-opc.h b/include/opcode/riscv-opc.h
index f09200c..18d0b15 100644
--- a/include/opcode/riscv-opc.h
+++ b/include/opcode/riscv-opc.h
@@ -1116,257 +1116,257 @@ DECLARE_INSN(custom3_rd_rs1, MATCH_CUSTOM3_RD_RS1, MASK_CUSTOM3_RD_RS1)
 DECLARE_INSN(custom3_rd_rs1_rs2, MATCH_CUSTOM3_RD_RS1_RS2, MASK_CUSTOM3_RD_RS1_RS2)
 #endif
 #ifdef DECLARE_CSR
-DECLARE_CSR(ustatus, CSR_USTATUS)
-DECLARE_CSR(uie, CSR_UIE)
-DECLARE_CSR(utvec, CSR_UTVEC)
-DECLARE_CSR(uscratch, CSR_USCRATCH)
-DECLARE_CSR(uepc, CSR_UEPC)
-DECLARE_CSR(ucause, CSR_UCAUSE)
-DECLARE_CSR(utval, CSR_UTVAL)
-DECLARE_CSR(uip, CSR_UIP)
-DECLARE_CSR(fflags, CSR_FFLAGS)
-DECLARE_CSR(frm, CSR_FRM)
-DECLARE_CSR(fcsr, CSR_FCSR)
-DECLARE_CSR(cycle, CSR_CYCLE)
-DECLARE_CSR(time, CSR_TIME)
-DECLARE_CSR(instret, CSR_INSTRET)
-DECLARE_CSR(hpmcounter3, CSR_HPMCOUNTER3)
-DECLARE_CSR(hpmcounter4, CSR_HPMCOUNTER4)
-DECLARE_CSR(hpmcounter5, CSR_HPMCOUNTER5)
-DECLARE_CSR(hpmcounter6, CSR_HPMCOUNTER6)
-DECLARE_CSR(hpmcounter7, CSR_HPMCOUNTER7)
-DECLARE_CSR(hpmcounter8, CSR_HPMCOUNTER8)
-DECLARE_CSR(hpmcounter9, CSR_HPMCOUNTER9)
-DECLARE_CSR(hpmcounter10, CSR_HPMCOUNTER10)
-DECLARE_CSR(hpmcounter11, CSR_HPMCOUNTER11)
-DECLARE_CSR(hpmcounter12, CSR_HPMCOUNTER12)
-DECLARE_CSR(hpmcounter13, CSR_HPMCOUNTER13)
-DECLARE_CSR(hpmcounter14, CSR_HPMCOUNTER14)
-DECLARE_CSR(hpmcounter15, CSR_HPMCOUNTER15)
-DECLARE_CSR(hpmcounter16, CSR_HPMCOUNTER16)
-DECLARE_CSR(hpmcounter17, CSR_HPMCOUNTER17)
-DECLARE_CSR(hpmcounter18, CSR_HPMCOUNTER18)
-DECLARE_CSR(hpmcounter19, CSR_HPMCOUNTER19)
-DECLARE_CSR(hpmcounter20, CSR_HPMCOUNTER20)
-DECLARE_CSR(hpmcounter21, CSR_HPMCOUNTER21)
-DECLARE_CSR(hpmcounter22, CSR_HPMCOUNTER22)
-DECLARE_CSR(hpmcounter23, CSR_HPMCOUNTER23)
-DECLARE_CSR(hpmcounter24, CSR_HPMCOUNTER24)
-DECLARE_CSR(hpmcounter25, CSR_HPMCOUNTER25)
-DECLARE_CSR(hpmcounter26, CSR_HPMCOUNTER26)
-DECLARE_CSR(hpmcounter27, CSR_HPMCOUNTER27)
-DECLARE_CSR(hpmcounter28, CSR_HPMCOUNTER28)
-DECLARE_CSR(hpmcounter29, CSR_HPMCOUNTER29)
-DECLARE_CSR(hpmcounter30, CSR_HPMCOUNTER30)
-DECLARE_CSR(hpmcounter31, CSR_HPMCOUNTER31)
-DECLARE_CSR(cycleh, CSR_CYCLEH)
-DECLARE_CSR(timeh, CSR_TIMEH)
-DECLARE_CSR(instreth, CSR_INSTRETH)
-DECLARE_CSR(hpmcounter3h, CSR_HPMCOUNTER3H)
-DECLARE_CSR(hpmcounter4h, CSR_HPMCOUNTER4H)
-DECLARE_CSR(hpmcounter5h, CSR_HPMCOUNTER5H)
-DECLARE_CSR(hpmcounter6h, CSR_HPMCOUNTER6H)
-DECLARE_CSR(hpmcounter7h, CSR_HPMCOUNTER7H)
-DECLARE_CSR(hpmcounter8h, CSR_HPMCOUNTER8H)
-DECLARE_CSR(hpmcounter9h, CSR_HPMCOUNTER9H)
-DECLARE_CSR(hpmcounter10h, CSR_HPMCOUNTER10H)
-DECLARE_CSR(hpmcounter11h, CSR_HPMCOUNTER11H)
-DECLARE_CSR(hpmcounter12h, CSR_HPMCOUNTER12H)
-DECLARE_CSR(hpmcounter13h, CSR_HPMCOUNTER13H)
-DECLARE_CSR(hpmcounter14h, CSR_HPMCOUNTER14H)
-DECLARE_CSR(hpmcounter15h, CSR_HPMCOUNTER15H)
-DECLARE_CSR(hpmcounter16h, CSR_HPMCOUNTER16H)
-DECLARE_CSR(hpmcounter17h, CSR_HPMCOUNTER17H)
-DECLARE_CSR(hpmcounter18h, CSR_HPMCOUNTER18H)
-DECLARE_CSR(hpmcounter19h, CSR_HPMCOUNTER19H)
-DECLARE_CSR(hpmcounter20h, CSR_HPMCOUNTER20H)
-DECLARE_CSR(hpmcounter21h, CSR_HPMCOUNTER21H)
-DECLARE_CSR(hpmcounter22h, CSR_HPMCOUNTER22H)
-DECLARE_CSR(hpmcounter23h, CSR_HPMCOUNTER23H)
-DECLARE_CSR(hpmcounter24h, CSR_HPMCOUNTER24H)
-DECLARE_CSR(hpmcounter25h, CSR_HPMCOUNTER25H)
-DECLARE_CSR(hpmcounter26h, CSR_HPMCOUNTER26H)
-DECLARE_CSR(hpmcounter27h, CSR_HPMCOUNTER27H)
-DECLARE_CSR(hpmcounter28h, CSR_HPMCOUNTER28H)
-DECLARE_CSR(hpmcounter29h, CSR_HPMCOUNTER29H)
-DECLARE_CSR(hpmcounter30h, CSR_HPMCOUNTER30H)
-DECLARE_CSR(hpmcounter31h, CSR_HPMCOUNTER31H)
-DECLARE_CSR(sstatus, CSR_SSTATUS)
-DECLARE_CSR(sedeleg, CSR_SEDELEG)
-DECLARE_CSR(sideleg, CSR_SIDELEG)
-DECLARE_CSR(sie, CSR_SIE)
-DECLARE_CSR(stvec, CSR_STVEC)
-DECLARE_CSR(scounteren, CSR_SCOUNTEREN)
-DECLARE_CSR(sscratch, CSR_SSCRATCH)
-DECLARE_CSR(sepc, CSR_SEPC)
-DECLARE_CSR(scause, CSR_SCAUSE)
-DECLARE_CSR(stval, CSR_STVAL)
-DECLARE_CSR(sip, CSR_SIP)
-DECLARE_CSR(satp, CSR_SATP)
-DECLARE_CSR(mvendorid, CSR_MVENDORID)
-DECLARE_CSR(marchid, CSR_MARCHID)
-DECLARE_CSR(mimpid, CSR_MIMPID)
-DECLARE_CSR(mhartid, CSR_MHARTID)
-DECLARE_CSR(mstatus, CSR_MSTATUS)
-DECLARE_CSR(misa, CSR_MISA)
-DECLARE_CSR(medeleg, CSR_MEDELEG)
-DECLARE_CSR(mideleg, CSR_MIDELEG)
-DECLARE_CSR(mie, CSR_MIE)
-DECLARE_CSR(mtvec, CSR_MTVEC)
-DECLARE_CSR(mcounteren, CSR_MCOUNTEREN)
-DECLARE_CSR(mscratch, CSR_MSCRATCH)
-DECLARE_CSR(mepc, CSR_MEPC)
-DECLARE_CSR(mcause, CSR_MCAUSE)
-DECLARE_CSR(mtval, CSR_MTVAL)
-DECLARE_CSR(mip, CSR_MIP)
-DECLARE_CSR(pmpcfg0, CSR_PMPCFG0)
-DECLARE_CSR(pmpcfg1, CSR_PMPCFG1)
-DECLARE_CSR(pmpcfg2, CSR_PMPCFG2)
-DECLARE_CSR(pmpcfg3, CSR_PMPCFG3)
-DECLARE_CSR(pmpaddr0, CSR_PMPADDR0)
-DECLARE_CSR(pmpaddr1, CSR_PMPADDR1)
-DECLARE_CSR(pmpaddr2, CSR_PMPADDR2)
-DECLARE_CSR(pmpaddr3, CSR_PMPADDR3)
-DECLARE_CSR(pmpaddr4, CSR_PMPADDR4)
-DECLARE_CSR(pmpaddr5, CSR_PMPADDR5)
-DECLARE_CSR(pmpaddr6, CSR_PMPADDR6)
-DECLARE_CSR(pmpaddr7, CSR_PMPADDR7)
-DECLARE_CSR(pmpaddr8, CSR_PMPADDR8)
-DECLARE_CSR(pmpaddr9, CSR_PMPADDR9)
-DECLARE_CSR(pmpaddr10, CSR_PMPADDR10)
-DECLARE_CSR(pmpaddr11, CSR_PMPADDR11)
-DECLARE_CSR(pmpaddr12, CSR_PMPADDR12)
-DECLARE_CSR(pmpaddr13, CSR_PMPADDR13)
-DECLARE_CSR(pmpaddr14, CSR_PMPADDR14)
-DECLARE_CSR(pmpaddr15, CSR_PMPADDR15)
-DECLARE_CSR(mcycle, CSR_MCYCLE)
-DECLARE_CSR(minstret, CSR_MINSTRET)
-DECLARE_CSR(mhpmcounter3, CSR_MHPMCOUNTER3)
-DECLARE_CSR(mhpmcounter4, CSR_MHPMCOUNTER4)
-DECLARE_CSR(mhpmcounter5, CSR_MHPMCOUNTER5)
-DECLARE_CSR(mhpmcounter6, CSR_MHPMCOUNTER6)
-DECLARE_CSR(mhpmcounter7, CSR_MHPMCOUNTER7)
-DECLARE_CSR(mhpmcounter8, CSR_MHPMCOUNTER8)
-DECLARE_CSR(mhpmcounter9, CSR_MHPMCOUNTER9)
-DECLARE_CSR(mhpmcounter10, CSR_MHPMCOUNTER10)
-DECLARE_CSR(mhpmcounter11, CSR_MHPMCOUNTER11)
-DECLARE_CSR(mhpmcounter12, CSR_MHPMCOUNTER12)
-DECLARE_CSR(mhpmcounter13, CSR_MHPMCOUNTER13)
-DECLARE_CSR(mhpmcounter14, CSR_MHPMCOUNTER14)
-DECLARE_CSR(mhpmcounter15, CSR_MHPMCOUNTER15)
-DECLARE_CSR(mhpmcounter16, CSR_MHPMCOUNTER16)
-DECLARE_CSR(mhpmcounter17, CSR_MHPMCOUNTER17)
-DECLARE_CSR(mhpmcounter18, CSR_MHPMCOUNTER18)
-DECLARE_CSR(mhpmcounter19, CSR_MHPMCOUNTER19)
-DECLARE_CSR(mhpmcounter20, CSR_MHPMCOUNTER20)
-DECLARE_CSR(mhpmcounter21, CSR_MHPMCOUNTER21)
-DECLARE_CSR(mhpmcounter22, CSR_MHPMCOUNTER22)
-DECLARE_CSR(mhpmcounter23, CSR_MHPMCOUNTER23)
-DECLARE_CSR(mhpmcounter24, CSR_MHPMCOUNTER24)
-DECLARE_CSR(mhpmcounter25, CSR_MHPMCOUNTER25)
-DECLARE_CSR(mhpmcounter26, CSR_MHPMCOUNTER26)
-DECLARE_CSR(mhpmcounter27, CSR_MHPMCOUNTER27)
-DECLARE_CSR(mhpmcounter28, CSR_MHPMCOUNTER28)
-DECLARE_CSR(mhpmcounter29, CSR_MHPMCOUNTER29)
-DECLARE_CSR(mhpmcounter30, CSR_MHPMCOUNTER30)
-DECLARE_CSR(mhpmcounter31, CSR_MHPMCOUNTER31)
-DECLARE_CSR(mcycleh, CSR_MCYCLEH)
-DECLARE_CSR(minstreth, CSR_MINSTRETH)
-DECLARE_CSR(mhpmcounter3h, CSR_MHPMCOUNTER3H)
-DECLARE_CSR(mhpmcounter4h, CSR_MHPMCOUNTER4H)
-DECLARE_CSR(mhpmcounter5h, CSR_MHPMCOUNTER5H)
-DECLARE_CSR(mhpmcounter6h, CSR_MHPMCOUNTER6H)
-DECLARE_CSR(mhpmcounter7h, CSR_MHPMCOUNTER7H)
-DECLARE_CSR(mhpmcounter8h, CSR_MHPMCOUNTER8H)
-DECLARE_CSR(mhpmcounter9h, CSR_MHPMCOUNTER9H)
-DECLARE_CSR(mhpmcounter10h, CSR_MHPMCOUNTER10H)
-DECLARE_CSR(mhpmcounter11h, CSR_MHPMCOUNTER11H)
-DECLARE_CSR(mhpmcounter12h, CSR_MHPMCOUNTER12H)
-DECLARE_CSR(mhpmcounter13h, CSR_MHPMCOUNTER13H)
-DECLARE_CSR(mhpmcounter14h, CSR_MHPMCOUNTER14H)
-DECLARE_CSR(mhpmcounter15h, CSR_MHPMCOUNTER15H)
-DECLARE_CSR(mhpmcounter16h, CSR_MHPMCOUNTER16H)
-DECLARE_CSR(mhpmcounter17h, CSR_MHPMCOUNTER17H)
-DECLARE_CSR(mhpmcounter18h, CSR_MHPMCOUNTER18H)
-DECLARE_CSR(mhpmcounter19h, CSR_MHPMCOUNTER19H)
-DECLARE_CSR(mhpmcounter20h, CSR_MHPMCOUNTER20H)
-DECLARE_CSR(mhpmcounter21h, CSR_MHPMCOUNTER21H)
-DECLARE_CSR(mhpmcounter22h, CSR_MHPMCOUNTER22H)
-DECLARE_CSR(mhpmcounter23h, CSR_MHPMCOUNTER23H)
-DECLARE_CSR(mhpmcounter24h, CSR_MHPMCOUNTER24H)
-DECLARE_CSR(mhpmcounter25h, CSR_MHPMCOUNTER25H)
-DECLARE_CSR(mhpmcounter26h, CSR_MHPMCOUNTER26H)
-DECLARE_CSR(mhpmcounter27h, CSR_MHPMCOUNTER27H)
-DECLARE_CSR(mhpmcounter28h, CSR_MHPMCOUNTER28H)
-DECLARE_CSR(mhpmcounter29h, CSR_MHPMCOUNTER29H)
-DECLARE_CSR(mhpmcounter30h, CSR_MHPMCOUNTER30H)
-DECLARE_CSR(mhpmcounter31h, CSR_MHPMCOUNTER31H)
-DECLARE_CSR(mhpmevent3, CSR_MHPMEVENT3)
-DECLARE_CSR(mhpmevent4, CSR_MHPMEVENT4)
-DECLARE_CSR(mhpmevent5, CSR_MHPMEVENT5)
-DECLARE_CSR(mhpmevent6, CSR_MHPMEVENT6)
-DECLARE_CSR(mhpmevent7, CSR_MHPMEVENT7)
-DECLARE_CSR(mhpmevent8, CSR_MHPMEVENT8)
-DECLARE_CSR(mhpmevent9, CSR_MHPMEVENT9)
-DECLARE_CSR(mhpmevent10, CSR_MHPMEVENT10)
-DECLARE_CSR(mhpmevent11, CSR_MHPMEVENT11)
-DECLARE_CSR(mhpmevent12, CSR_MHPMEVENT12)
-DECLARE_CSR(mhpmevent13, CSR_MHPMEVENT13)
-DECLARE_CSR(mhpmevent14, CSR_MHPMEVENT14)
-DECLARE_CSR(mhpmevent15, CSR_MHPMEVENT15)
-DECLARE_CSR(mhpmevent16, CSR_MHPMEVENT16)
-DECLARE_CSR(mhpmevent17, CSR_MHPMEVENT17)
-DECLARE_CSR(mhpmevent18, CSR_MHPMEVENT18)
-DECLARE_CSR(mhpmevent19, CSR_MHPMEVENT19)
-DECLARE_CSR(mhpmevent20, CSR_MHPMEVENT20)
-DECLARE_CSR(mhpmevent21, CSR_MHPMEVENT21)
-DECLARE_CSR(mhpmevent22, CSR_MHPMEVENT22)
-DECLARE_CSR(mhpmevent23, CSR_MHPMEVENT23)
-DECLARE_CSR(mhpmevent24, CSR_MHPMEVENT24)
-DECLARE_CSR(mhpmevent25, CSR_MHPMEVENT25)
-DECLARE_CSR(mhpmevent26, CSR_MHPMEVENT26)
-DECLARE_CSR(mhpmevent27, CSR_MHPMEVENT27)
-DECLARE_CSR(mhpmevent28, CSR_MHPMEVENT28)
-DECLARE_CSR(mhpmevent29, CSR_MHPMEVENT29)
-DECLARE_CSR(mhpmevent30, CSR_MHPMEVENT30)
-DECLARE_CSR(mhpmevent31, CSR_MHPMEVENT31)
-DECLARE_CSR(tselect, CSR_TSELECT)
-DECLARE_CSR(tdata1, CSR_TDATA1)
-DECLARE_CSR(tdata2, CSR_TDATA2)
-DECLARE_CSR(tdata3, CSR_TDATA3)
-DECLARE_CSR(dcsr, CSR_DCSR)
-DECLARE_CSR(dpc, CSR_DPC)
-DECLARE_CSR(dscratch, CSR_DSCRATCH)
+DECLARE_CSR(ustatus, CSR_USTATUS, CSR_CLASS_I)
+DECLARE_CSR(uie, CSR_UIE, CSR_CLASS_I)
+DECLARE_CSR(utvec, CSR_UTVEC, CSR_CLASS_I)
+DECLARE_CSR(uscratch, CSR_USCRATCH, CSR_CLASS_I)
+DECLARE_CSR(uepc, CSR_UEPC, CSR_CLASS_I)
+DECLARE_CSR(ucause, CSR_UCAUSE, CSR_CLASS_I)
+DECLARE_CSR(utval, CSR_UTVAL, CSR_CLASS_I)
+DECLARE_CSR(uip, CSR_UIP, CSR_CLASS_I)
+DECLARE_CSR(fflags, CSR_FFLAGS, CSR_CLASS_F)
+DECLARE_CSR(frm, CSR_FRM, CSR_CLASS_F)
+DECLARE_CSR(fcsr, CSR_FCSR, CSR_CLASS_F)
+DECLARE_CSR(cycle, CSR_CYCLE, CSR_CLASS_I)
+DECLARE_CSR(time, CSR_TIME, CSR_CLASS_I)
+DECLARE_CSR(instret, CSR_INSTRET, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter3, CSR_HPMCOUNTER3, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter4, CSR_HPMCOUNTER4, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter5, CSR_HPMCOUNTER5, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter6, CSR_HPMCOUNTER6, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter7, CSR_HPMCOUNTER7, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter8, CSR_HPMCOUNTER8, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter9, CSR_HPMCOUNTER9, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter10, CSR_HPMCOUNTER10, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter11, CSR_HPMCOUNTER11, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter12, CSR_HPMCOUNTER12, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter13, CSR_HPMCOUNTER13, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter14, CSR_HPMCOUNTER14, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter15, CSR_HPMCOUNTER15, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter16, CSR_HPMCOUNTER16, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter17, CSR_HPMCOUNTER17, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter18, CSR_HPMCOUNTER18, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter19, CSR_HPMCOUNTER19, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter20, CSR_HPMCOUNTER20, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter21, CSR_HPMCOUNTER21, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter22, CSR_HPMCOUNTER22, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter23, CSR_HPMCOUNTER23, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter24, CSR_HPMCOUNTER24, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter25, CSR_HPMCOUNTER25, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter26, CSR_HPMCOUNTER26, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter27, CSR_HPMCOUNTER27, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter28, CSR_HPMCOUNTER28, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter29, CSR_HPMCOUNTER29, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter30, CSR_HPMCOUNTER30, CSR_CLASS_I)
+DECLARE_CSR(hpmcounter31, CSR_HPMCOUNTER31, CSR_CLASS_I)
+DECLARE_CSR(cycleh, CSR_CYCLEH, CSR_CLASS_I_32)
+DECLARE_CSR(timeh, CSR_TIMEH, CSR_CLASS_I_32)
+DECLARE_CSR(instreth, CSR_INSTRETH, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter3h, CSR_HPMCOUNTER3H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter4h, CSR_HPMCOUNTER4H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter5h, CSR_HPMCOUNTER5H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter6h, CSR_HPMCOUNTER6H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter7h, CSR_HPMCOUNTER7H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter8h, CSR_HPMCOUNTER8H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter9h, CSR_HPMCOUNTER9H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter10h, CSR_HPMCOUNTER10H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter11h, CSR_HPMCOUNTER11H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter12h, CSR_HPMCOUNTER12H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter13h, CSR_HPMCOUNTER13H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter14h, CSR_HPMCOUNTER14H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter15h, CSR_HPMCOUNTER15H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter16h, CSR_HPMCOUNTER16H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter17h, CSR_HPMCOUNTER17H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter18h, CSR_HPMCOUNTER18H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter19h, CSR_HPMCOUNTER19H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter20h, CSR_HPMCOUNTER20H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter21h, CSR_HPMCOUNTER21H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter22h, CSR_HPMCOUNTER22H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter23h, CSR_HPMCOUNTER23H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter24h, CSR_HPMCOUNTER24H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter25h, CSR_HPMCOUNTER25H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter26h, CSR_HPMCOUNTER26H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter27h, CSR_HPMCOUNTER27H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter28h, CSR_HPMCOUNTER28H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter29h, CSR_HPMCOUNTER29H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter30h, CSR_HPMCOUNTER30H, CSR_CLASS_I_32)
+DECLARE_CSR(hpmcounter31h, CSR_HPMCOUNTER31H, CSR_CLASS_I_32)
+DECLARE_CSR(sstatus, CSR_SSTATUS, CSR_CLASS_I)
+DECLARE_CSR(sedeleg, CSR_SEDELEG, CSR_CLASS_I)
+DECLARE_CSR(sideleg, CSR_SIDELEG, CSR_CLASS_I)
+DECLARE_CSR(sie, CSR_SIE, CSR_CLASS_I)
+DECLARE_CSR(stvec, CSR_STVEC, CSR_CLASS_I)
+DECLARE_CSR(scounteren, CSR_SCOUNTEREN, CSR_CLASS_I)
+DECLARE_CSR(sscratch, CSR_SSCRATCH, CSR_CLASS_I)
+DECLARE_CSR(sepc, CSR_SEPC, CSR_CLASS_I)
+DECLARE_CSR(scause, CSR_SCAUSE, CSR_CLASS_I)
+DECLARE_CSR(stval, CSR_STVAL, CSR_CLASS_I)
+DECLARE_CSR(sip, CSR_SIP, CSR_CLASS_I)
+DECLARE_CSR(satp, CSR_SATP, CSR_CLASS_I)
+DECLARE_CSR(mvendorid, CSR_MVENDORID, CSR_CLASS_I)
+DECLARE_CSR(marchid, CSR_MARCHID, CSR_CLASS_I)
+DECLARE_CSR(mimpid, CSR_MIMPID, CSR_CLASS_I)
+DECLARE_CSR(mhartid, CSR_MHARTID, CSR_CLASS_I)
+DECLARE_CSR(mstatus, CSR_MSTATUS, CSR_CLASS_I)
+DECLARE_CSR(misa, CSR_MISA, CSR_CLASS_I)
+DECLARE_CSR(medeleg, CSR_MEDELEG, CSR_CLASS_I)
+DECLARE_CSR(mideleg, CSR_MIDELEG, CSR_CLASS_I)
+DECLARE_CSR(mie, CSR_MIE, CSR_CLASS_I)
+DECLARE_CSR(mtvec, CSR_MTVEC, CSR_CLASS_I)
+DECLARE_CSR(mcounteren, CSR_MCOUNTEREN, CSR_CLASS_I)
+DECLARE_CSR(mscratch, CSR_MSCRATCH, CSR_CLASS_I)
+DECLARE_CSR(mepc, CSR_MEPC, CSR_CLASS_I)
+DECLARE_CSR(mcause, CSR_MCAUSE, CSR_CLASS_I)
+DECLARE_CSR(mtval, CSR_MTVAL, CSR_CLASS_I)
+DECLARE_CSR(mip, CSR_MIP, CSR_CLASS_I)
+DECLARE_CSR(pmpcfg0, CSR_PMPCFG0, CSR_CLASS_I)
+DECLARE_CSR(pmpcfg1, CSR_PMPCFG1, CSR_CLASS_I_32)
+DECLARE_CSR(pmpcfg2, CSR_PMPCFG2, CSR_CLASS_I)
+DECLARE_CSR(pmpcfg3, CSR_PMPCFG3, CSR_CLASS_I_32)
+DECLARE_CSR(pmpaddr0, CSR_PMPADDR0, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr1, CSR_PMPADDR1, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr2, CSR_PMPADDR2, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr3, CSR_PMPADDR3, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr4, CSR_PMPADDR4, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr5, CSR_PMPADDR5, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr6, CSR_PMPADDR6, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr7, CSR_PMPADDR7, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr8, CSR_PMPADDR8, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr9, CSR_PMPADDR9, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr10, CSR_PMPADDR10, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr11, CSR_PMPADDR11, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr12, CSR_PMPADDR12, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr13, CSR_PMPADDR13, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr14, CSR_PMPADDR14, CSR_CLASS_I)
+DECLARE_CSR(pmpaddr15, CSR_PMPADDR15, CSR_CLASS_I)
+DECLARE_CSR(mcycle, CSR_MCYCLE, CSR_CLASS_I)
+DECLARE_CSR(minstret, CSR_MINSTRET, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter3, CSR_MHPMCOUNTER3, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter4, CSR_MHPMCOUNTER4, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter5, CSR_MHPMCOUNTER5, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter6, CSR_MHPMCOUNTER6, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter7, CSR_MHPMCOUNTER7, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter8, CSR_MHPMCOUNTER8, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter9, CSR_MHPMCOUNTER9, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter10, CSR_MHPMCOUNTER10, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter11, CSR_MHPMCOUNTER11, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter12, CSR_MHPMCOUNTER12, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter13, CSR_MHPMCOUNTER13, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter14, CSR_MHPMCOUNTER14, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter15, CSR_MHPMCOUNTER15, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter16, CSR_MHPMCOUNTER16, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter17, CSR_MHPMCOUNTER17, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter18, CSR_MHPMCOUNTER18, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter19, CSR_MHPMCOUNTER19, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter20, CSR_MHPMCOUNTER20, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter21, CSR_MHPMCOUNTER21, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter22, CSR_MHPMCOUNTER22, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter23, CSR_MHPMCOUNTER23, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter24, CSR_MHPMCOUNTER24, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter25, CSR_MHPMCOUNTER25, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter26, CSR_MHPMCOUNTER26, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter27, CSR_MHPMCOUNTER27, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter28, CSR_MHPMCOUNTER28, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter29, CSR_MHPMCOUNTER29, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter30, CSR_MHPMCOUNTER30, CSR_CLASS_I)
+DECLARE_CSR(mhpmcounter31, CSR_MHPMCOUNTER31, CSR_CLASS_I)
+DECLARE_CSR(mcycleh, CSR_MCYCLEH, CSR_CLASS_I_32)
+DECLARE_CSR(minstreth, CSR_MINSTRETH, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter3h, CSR_MHPMCOUNTER3H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter4h, CSR_MHPMCOUNTER4H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter5h, CSR_MHPMCOUNTER5H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter6h, CSR_MHPMCOUNTER6H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter7h, CSR_MHPMCOUNTER7H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter8h, CSR_MHPMCOUNTER8H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter9h, CSR_MHPMCOUNTER9H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter10h, CSR_MHPMCOUNTER10H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter11h, CSR_MHPMCOUNTER11H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter12h, CSR_MHPMCOUNTER12H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter13h, CSR_MHPMCOUNTER13H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter14h, CSR_MHPMCOUNTER14H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter15h, CSR_MHPMCOUNTER15H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter16h, CSR_MHPMCOUNTER16H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter17h, CSR_MHPMCOUNTER17H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter18h, CSR_MHPMCOUNTER18H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter19h, CSR_MHPMCOUNTER19H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter20h, CSR_MHPMCOUNTER20H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter21h, CSR_MHPMCOUNTER21H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter22h, CSR_MHPMCOUNTER22H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter23h, CSR_MHPMCOUNTER23H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter24h, CSR_MHPMCOUNTER24H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter25h, CSR_MHPMCOUNTER25H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter26h, CSR_MHPMCOUNTER26H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter27h, CSR_MHPMCOUNTER27H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter28h, CSR_MHPMCOUNTER28H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter29h, CSR_MHPMCOUNTER29H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter30h, CSR_MHPMCOUNTER30H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmcounter31h, CSR_MHPMCOUNTER31H, CSR_CLASS_I_32)
+DECLARE_CSR(mhpmevent3, CSR_MHPMEVENT3, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent4, CSR_MHPMEVENT4, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent5, CSR_MHPMEVENT5, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent6, CSR_MHPMEVENT6, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent7, CSR_MHPMEVENT7, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent8, CSR_MHPMEVENT8, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent9, CSR_MHPMEVENT9, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent10, CSR_MHPMEVENT10, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent11, CSR_MHPMEVENT11, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent12, CSR_MHPMEVENT12, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent13, CSR_MHPMEVENT13, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent14, CSR_MHPMEVENT14, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent15, CSR_MHPMEVENT15, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent16, CSR_MHPMEVENT16, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent17, CSR_MHPMEVENT17, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent18, CSR_MHPMEVENT18, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent19, CSR_MHPMEVENT19, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent20, CSR_MHPMEVENT20, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent21, CSR_MHPMEVENT21, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent22, CSR_MHPMEVENT22, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent23, CSR_MHPMEVENT23, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent24, CSR_MHPMEVENT24, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent25, CSR_MHPMEVENT25, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent26, CSR_MHPMEVENT26, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent27, CSR_MHPMEVENT27, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent28, CSR_MHPMEVENT28, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent29, CSR_MHPMEVENT29, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent30, CSR_MHPMEVENT30, CSR_CLASS_I)
+DECLARE_CSR(mhpmevent31, CSR_MHPMEVENT31, CSR_CLASS_I)
+DECLARE_CSR(tselect, CSR_TSELECT, CSR_CLASS_I)
+DECLARE_CSR(tdata1, CSR_TDATA1, CSR_CLASS_I)
+DECLARE_CSR(tdata2, CSR_TDATA2, CSR_CLASS_I)
+DECLARE_CSR(tdata3, CSR_TDATA3, CSR_CLASS_I)
+DECLARE_CSR(dcsr, CSR_DCSR, CSR_CLASS_I)
+DECLARE_CSR(dpc, CSR_DPC, CSR_CLASS_I)
+DECLARE_CSR(dscratch, CSR_DSCRATCH, CSR_CLASS_I)
 /* These registers are present in priv spec 1.9.1, dropped in 1.10.  */
-DECLARE_CSR(hstatus, CSR_HSTATUS)
-DECLARE_CSR(hedeleg, CSR_HEDELEG)
-DECLARE_CSR(hideleg, CSR_HIDELEG)
-DECLARE_CSR(hie, CSR_HIE)
-DECLARE_CSR(htvec, CSR_HTVEC)
-DECLARE_CSR(hscratch, CSR_HSCRATCH)
-DECLARE_CSR(hepc, CSR_HEPC)
-DECLARE_CSR(hcause, CSR_HCAUSE)
-DECLARE_CSR(hbadaddr, CSR_HBADADDR)
-DECLARE_CSR(hip, CSR_HIP)
-DECLARE_CSR(mbase, CSR_MBASE)
-DECLARE_CSR(mbound, CSR_MBOUND)
-DECLARE_CSR(mibase, CSR_MIBASE)
-DECLARE_CSR(mibound, CSR_MIBOUND)
-DECLARE_CSR(mdbase, CSR_MDBASE)
-DECLARE_CSR(mdbound, CSR_MDBOUND)
-DECLARE_CSR(mucounteren, CSR_MUCOUNTEREN)
-DECLARE_CSR(mscounteren, CSR_MSCOUNTEREN)
-DECLARE_CSR(mhcounteren, CSR_MHCOUNTEREN)
+DECLARE_CSR(hstatus, CSR_HSTATUS, CSR_CLASS_I)
+DECLARE_CSR(hedeleg, CSR_HEDELEG, CSR_CLASS_I)
+DECLARE_CSR(hideleg, CSR_HIDELEG, CSR_CLASS_I)
+DECLARE_CSR(hie, CSR_HIE, CSR_CLASS_I)
+DECLARE_CSR(htvec, CSR_HTVEC, CSR_CLASS_I)
+DECLARE_CSR(hscratch, CSR_HSCRATCH, CSR_CLASS_I)
+DECLARE_CSR(hepc, CSR_HEPC, CSR_CLASS_I)
+DECLARE_CSR(hcause, CSR_HCAUSE, CSR_CLASS_I)
+DECLARE_CSR(hbadaddr, CSR_HBADADDR, CSR_CLASS_I)
+DECLARE_CSR(hip, CSR_HIP, CSR_CLASS_I)
+DECLARE_CSR(mbase, CSR_MBASE, CSR_CLASS_I)
+DECLARE_CSR(mbound, CSR_MBOUND, CSR_CLASS_I)
+DECLARE_CSR(mibase, CSR_MIBASE, CSR_CLASS_I)
+DECLARE_CSR(mibound, CSR_MIBOUND, CSR_CLASS_I)
+DECLARE_CSR(mdbase, CSR_MDBASE, CSR_CLASS_I)
+DECLARE_CSR(mdbound, CSR_MDBOUND, CSR_CLASS_I)
+DECLARE_CSR(mucounteren, CSR_MUCOUNTEREN, CSR_CLASS_I)
+DECLARE_CSR(mscounteren, CSR_MSCOUNTEREN, CSR_CLASS_I)
+DECLARE_CSR(mhcounteren, CSR_MHCOUNTEREN, CSR_CLASS_I)
 #endif
 #ifdef DECLARE_CSR_ALIAS
 /* Ubadaddr is 0x043 in 1.9.1, but 0x043 is utval in 1.10.  */
-DECLARE_CSR_ALIAS(ubadaddr, CSR_UTVAL)
+DECLARE_CSR_ALIAS(ubadaddr, CSR_UTVAL, CSR_CLASS_I)
 /* Sbadaddr is 0x143 in 1.9.1, but 0x143 is stval in 1.10.  */
-DECLARE_CSR_ALIAS(sbadaddr, CSR_STVAL)
+DECLARE_CSR_ALIAS(sbadaddr, CSR_STVAL, CSR_CLASS_I)
 /* Sptbr is 0x180 in 1.9.1, but 0x180 is satp in 1.10.  */
-DECLARE_CSR_ALIAS(sptbr, CSR_SATP)
+DECLARE_CSR_ALIAS(sptbr, CSR_SATP, CSR_CLASS_I)
 /* Mbadaddr is 0x343 in 1.9.1, but 0x343 is mtval in 1.10.  */
-DECLARE_CSR_ALIAS(mbadaddr, CSR_MTVAL)
+DECLARE_CSR_ALIAS(mbadaddr, CSR_MTVAL, CSR_CLASS_I)
 #endif
 #ifdef DECLARE_CAUSE
 DECLARE_CAUSE("misaligned fetch", CAUSE_MISALIGNED_FETCH)
diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index 47f9db0..d7a184c 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -326,7 +326,7 @@ print_insn_args (const char *d, insn_t l, bfd_vma pc, disassemble_info *info)
 	    unsigned int csr = EXTRACT_OPERAND (CSR, l);
 	    switch (csr)
 	      {
-#define DECLARE_CSR(name, num) case num: csr_name = #name; break;
+#define DECLARE_CSR(name, num, class) case num: csr_name = #name; break;
 #include "opcode/riscv-opc.h"
 #undef DECLARE_CSR
 	      }
-- 
2.7.4

Re: [PATCH v5 0/3] RISC-V: Support more rigorous check for CSR

[Jim Wilson]

On Wed, Feb 12, 2020 at 2:18 AM Nelson Chu <nelson.chu@sifive.com> wrote:
> * [PATCH v5 1/3] RISC-V: Support the ISA-dependent CSR checking.
> a. Add missing comments for each function.
> b. Add -march=rv32if option to the csr-dw-regnum test case.
> c. Report warning messages rather than error for the CSR cheking.
> d. Keep the consistent usage in gas/config/tc-riscv.c (from Andrew's suggestion)
> d-1. Change the 'typedef struct {...} riscv_csr_extra' to
> 'struct riscv_csr_extra {...}'.
> d-2. Use 'if (hash_error != NULL)' in init_opcode_hash and riscv_init_csr_hash, since
> hash_error is not a boolean.
>
> * [PATCH v5 2/3] RISC-V: Disable the CSR checking by default.
>
> * [PATCH v5 3/3] RISC-V: Support the read-only CSR checking.

This looks good.  I fixed a comment typo in part 3, and rewrote the
ChangeLog entries a bit because you didn't mention all of the types,
variables, and functions modified by the patches.  Andrew Burgess had
already approved the gdb parts, so I committed both the binutils and
gdb patches.

Jim

Re: [PATCH v5 0/3] RISC-V: Support more rigorous check for CSR

[Nelson Chu]

Hi Jim,

Thanks for helps :)

On Fri, Feb 21, 2020 at 8:55 AM Jim Wilson <jimw@sifive.com> wrote:
> I fixed a comment typo in part 3, and rewrote the
> ChangeLog entries a bit because you didn't mention all of the types,
> variables, and functions modified by the patches.

I will pay attention to this next time, thanks.

Nelson